(HEWLETT-PACKARD) - hieuchuan.com.vnhieuchuan.com.vn/wp-content/uploads/Modul-8901b.pdf · T.O. 33K3-4-3118-1 1 MODULATION ANALYZER 8901B (HEWLETT-PACKARD) 1 CALIBRATION DESCRIPTION:

T.O. 33K3-4-3118-1

30 AUGUST 1998

TECHNICAL MANUAL

CALIBRATION PROCEDURE

FOR

MODULATION ANALYZER

8901B

(HEWLETT-PACKARD)

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Destruction Notice - For unclassified, limited documents, destroy by any method that will preventdisclosure of the contents or reconstruction of the document.

Published under Authority of the Secretary of the Air Force

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A USAF

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1

MODULATION ANALYZER

8901B

(HEWLETT-PACKARD)

1 CALIBRATION DESCRIPTION:

Table 1.

Test Instrument (TI) Performance TestCharacteristics Specifications Method

Frequency Counter Accuracy

Reference Oscillator Range: 10 MHz Compared to aFrequency Standard

Accuracy (Std):Aging month: <1.0 X 10-6;*Temperature: <2 X 10-7/°C*Line Variation: <1 X 10-6

Accuracy: Opt 002 (TCXO)Aging day: <1.0 X 10-9

After 30 day warm-up*Temperature: <2 X 10-10/°C*Line Variation: <6 X 10-10

Display Range: 150 kHz to 1300 MHz Compared to FrequencyStandard

Accuracy: ±Reference Oscillatoraccuracy ±3 counts of least significantdigit (LSD)** @ f <100 MHz; ±Reference Oscillatoraccuracy ±3 counts of LSD or 30 Hz,whichever is larger @ f ≥100 MHz

** The Frequency Counter Accuracy is based upon a 1 Hz resolution. 10 Hzresolution for instruments with firmware date codes 234.1985 and below. (To displaythe firmware date code, select 42.0 SPCL.)

AM Modulation Range: to 99% depth: Measured with an Depth 20 Hz to 10 kHz for 150 kHz to AM/FM Test Source

10 MHz carrier;20 Hz to 100 kHz for 10 to1300 MHz carrier

Accuracy: As shown below:

AM ACCURACY(±1 digit) FREQUENCY RANGE RATES DEPTH

±2% of reading 150 kHz-10 MHz 50 Hz-10 kHz 5%-99%

±3% of reading 150 kHz-10 MHz 20 Hz-10 kHz to 99%

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Table 1. (Cont.)


AM ACCURACY (Cont.) Accuracy: As shown below:

(±1 digit) FREQUENCY RANGE RATES DEPTH

±3% of reading 10 MHz-1300 MHz 20 Hz-100 kHz to 99%

±1% of reading 10 MHz-1300 MHz 50 Hz-50 kHz 5%-99%

Flatness Range: 10 to 1300 MHz carrier; Measured with an90 Hz to 10 kHz rates; AM/FM Test Source20 to 80% depth

Accuracy: ±0.3% of reading ±1 digit

Demodulated Output Accuracy: Measured on a Distortion < 0.3% THD for ≤50% depth; Distortion

< 0.6% THD for ≤95% depth Measurement Set

FM Rejection Range: 250 kHz to 1300 MHz Measured with anAM/FM Test Source

Accuracy: <0.2% AM, 250 kHzto 10 MHz carrier,<5 kHz peak deviation at400 Hz or 1 kHz rates;<0.2 % AM, 10 MHz to 1300 MHzcarrier, <50 kHz peak deviationat 400 Hz or 1 kHz rates

Residual AM Range: 50 Hz to 3 kHz BW

Accuracy: <0.01% rms

Frequency Modulation Range: 40 kHz peak maximum, Measured on a Maximum Peak Deviation 150 kHz to 10 MHz carrier; Spectrum Analyzer

400 kHz peak maximum,10 MHz to 1300 MHz carrier;40 kHz peak maximum,10 MHz to 1300 MHz carrier,750 µs de-emphasis

Accuracy: As shown below:

FM ACCURACY PEAK(±1 digit) FREQUENCY RANGE RATES DEVIATION

±2% of reading 250 kHz-10 MHz 20 Hz-10 kHz ≤40 kHz

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Table 1. (Cont.)


FM ACCURACY (Cont.) Accuracy: As shown below:PEAK

(±1 digit) FREQUENCY RANGE RATES DEVIATION

±1% of reading 10 MHz-1300 MHz 50 Hz-100 kHz ≤400 kHz

±5% of reading 10 MHz-1300 MHz 20 Hz-200 kHz ≤400 kHz

Demodulated OutputDistortion

THD FREQUENCY RANGE RATES DEVIATION

<0.1% 400 kHz-10 MHz 20 Hz-10 kHz ≤10 kHz

<0.1% 10 MHz-1300 MHz 20 Hz-100 kHz ≤100 kHz

AM Rejection Range: 150 kHz to 1300 MHz, Measured on an@ 50 Hz to 3 kHz BW AM/FM Test Set

Accuracy:<20 Hz peak deviation for≤50% AM depth at 400 Hz or1 kHz rates

Residual FM Range: 50 Hz to 3 kHz BW Measured on anAM/FM Test Set

Accuracy: <8 Hz rms at1300 MHz decreasing linearlywith frequency to <1 Hz rmsfor 100 MHz and below

Phase Modulation Range: 200 Hz to 10 kHz for Generated by frequency150 kHz to 10 MHz carrier; modulating a carrier at a200 Hz to 20 kHz for known peak deviation and 10 MHz to 1300 MHz carrier rate

Table 1. (Cont.)

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Phase Modulation (Cont.)

ΦM ACCURACY Accuracy: As shown below: PEAK DEVIATIONS

( ±1 digit) FREQUENCY RANGE (to 1 kHz rates)

±4% of reading 150 kHz-10 MHz ≤40 radians

±3% of reading 10 MHz-1300 MHz ≤400 radians

Demodulated Output Range: 250 kHz to 1300 MHz Measured on an Distortion Audio Analyzer

Accuracy: <0.1 % THD

AM Rejection Range: 150 kHz to 1300 MHz Measured on anAM/FM Test Set

Accuracy: <0.03 radians peakfor 1 kHz rate at 50% AM depth;50 Hz to 3 kHz BW

Audio Filters Range: Rates ≥200 Hz to Audio Synthesizer signal≤10 kHz modulated with AM/FM

Test Source, and knownAccuracy: As shown below: rates are measured with TI

50 Hz High-Pass (2 Pole) Flatness: <1% at rates ≥200 Hz

300 Hz High-Pass (2 Pole) Flatness: <1% at rates ≥1 kHz

3 kHz Low-Pass (5 Pole) Flatness: <1% at rates ≤1 kHz

15 kHz Low-Pass (5 Pole) Flatness: <1% at rates ≤10 kHz

>20 kHz Low-Pass Flatness: <1% at rates ≤10 kHz(9 Pole Bessel)

De-emphasis Filters 25 µs, 50 µs, 75 µs, and 750 µs nominal(Low-Pass, 1 Pole)

Audio RMS Level Range 50 Hz to 40 kHz Measured with an0.1 to 3 V rms Audio Analyzer

Accuracy: ±4% of rdg

Audio Frequency Counter Range: 20 Hz to 250 kHz

Accuracy:±reference, ±3 digits

Table 1. (Cont.)

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Audio Distortion Range: 400 and 1000 Hz; Measured on an0.1 to 3 V rms, 20 Hz to Audio Analyzer50 kHz Bandwidth

Accuracy: Frequency: ±5%Residual Noise: <0.3% (-50.4 dB);Distortion: ±1 dB of reading;Sensitivity: 0.1 to 3 V rms, external

RF Power

Power Reference Output Range: 1 mW Measured with aPower Meter and

Accuracy: ±1.2% Thermistor MountCertified to ±2%

RF Range Linearity Range: 10 µW to 1 W Measured with aRange Calibrator

Accuracy:±0.03 dB, RF Range 1;±0.02 dB, RF Ranges 2 to 5

RF Range-to-Range Range: 10 µW to 1 W Measured with aChange Error Range Calibrator

Accuracy: ±0.02 dB/RF RangeChange from Reference Range

High-Selectivity Filters

Wide Filter Filter Shape: 12.5 kHz Measured by inputting(Option Combination Loss at First Minimum: >-2 dB a 455 kHz CW signal032 and 037) 6 dB Bandwidth: 6.4 to 10.4 kHz into the TI, changing the

Loss at 1.6 kHz Below Lower input frequency and6 dB Corner: <-30 dB determining the shape ofLoss at 4.6 kHz Below Lower the IF6 dB Corner: <-80 dBLoss at 12 kHz Above Lower6 dB Corner: <-30 dBLoss at 15 kHz Above Lower6 dB Corner: <-80 dB

Table 1. (Cont.)

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Wide Filter Filter Shape: 25 kHz(Option Combination Loss at First Minimum: >-2 dB032 and 033 or 033 6 dB Bandwidth: 12.4 to 16.9 kHzand 037) Loss at 1.6 kHz Below Lower

6 dB Corner: <-30 dB

Loss at 4.6 kHz Below Lower6 dB Corner: <-80 dBLoss at 18.5 kHz Above Lower6 dB Corner: <-30 dBLoss at 21.5 kHz Above Lower6 dB Corner: <-80 dB

Narrow Filter Filter Shape: 12.5 kHz(Option Combination Loss at First Minimum: >-2 dB032 and 033 or 032 6 dB Bandwidth: 6.4 to 10.4 kHzand 035) Loss at 1.6 kHz Below Lower

6 dB Corner: <-30 dBLoss at 4.6 kHz Below Lower6 dB Corner: <-80 dBLoss at 12 kHz Above Lower6 dB Corner: <-30 dBLoss at 15 kHz Above Lower6 dB Corner: <-80 dB

Narrow Filter Filter Shape: 25 kHz(Option Combination Loss at First Minimum: >-2 dB033 and 035) 6 dB Bandwidth: 12.4 to 16.9 kHz

Loss at 1.6 kHz Below Lower6 dB Corner: <-30 dBLoss at 4.6 kHz Below Lower6 dB Corner: <-80 dBLoss at 18.5 kHz Above Lower6 dB Corner: <-30 dBLoss at 21.5 kHz Above Lower6 dB Corner: <-80 dB

High-Selectivity Gain Frequency Range: 10 to 1300 MHz Measured by inputting a(Option 030 Series) 455 kHz CW signal into

Carrier Power Range: the TI, changing the input+30 to -20 dBm, 12.5, 25, power by 5 dB and verifyingand 30 kHz Filters; TI gain accuracy+30 to -10 dBm, Carrier NoiseFilter

Table 1. (Cont.)

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High Selectivity Gain Relative Accuracy:(Option 030 Series) Levels >-95 dBc, 12.5, 25,(Cont.) and 30 kHz Filters: ±0.5 dB;

Levels >-129 dBc/Hz Carrier NoiseFilter: ±0.5 dB

* Typical or Operational specification. Not calibrated.

2 EQUIPMENT REQUIREMENTS:

Minimum Use Calibration Sub-Noun Specifications Equipment Item

2.1 FREQUENCY Range: 10 X 10-7 to 1 X 10-11 TracorDIFFERENCE 527EMETER Accuracy: N/A

2.2 FREQUENCY Range: 10 MHz AustronSTANDARD 2100F

Accuracy: <1 X 10-10

2.3 FREQUENCY Range: 10 MHz Hewlett-PackardCOUNTER 5345A/5355A

Accuracy: ≤5 X 10-10

2.4 AM/FM TEST Carrier Frequency: within Hewlett-PackardSOURCE range 10 to 1300 MHz 11715A

Output Level: >-20 dBm

FM Deviation:400 kHz peak maximum

FM Distortion: <-72 dB at Hewlett-Packard12.5 MHz carrier with 11715A12.5 kHz deviation and<10 kHz rate;<-72 dB at 400 MHz carrierand 400 kHz deviation at<100 kHz rate

FM Flatness: ±0.1% from20 Hz to 100 kHz rates;±0.25% to 200 kHz rates


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2.4 AM/FM TEST CW Residual FM:SOURCE (Cont.) <3 Hz rms in a 50 Hz to

3 kHz bandwidth at560 MHz

Incidental AM: <0.08% AMat 100 MHz with <50 kHzpeak deviation and 1 kHz ratein a 50 Hz to 3 kHz bandwidth

AM Depth: 5% to 99%

AM Distortion: <-66 dB at<50% AM at 20 Hz to100 kHz rates;<-60 dB at <95% AMat 20 Hz to 100 kHz rate

AM Flatness: ±0.1% from50 Hz to 50 kHz;±0.25% from 20 Hz to 100 kHz

Incidental φ Mod:<0.008 rad peak at12.5 MHz with 50% AMat a 1 kHz rate in a50 Hz to 3 kHz bandwidth

Residual AM:<0.01% rms in a 50 Hz to3 kHz bandwidth

AM Linearity: ±0.1% at<95% AM; ±0.2% at<99% AM

2.5 AUDIO Frequency Range: Hewlett-PackardSYNTHESIZER 10 Hz to 20 MHz 3336C OPT 004-005

Frequency Accuracy: ±0.005 Hzof setting (Min Use Spec)

Output Level:+8.76 dBm (50 Ω) maximum

Level Flatness:±0.07 dB, 10 Hz to 20 MHz


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2.6 AUDIO ANALYZER Range: 20 Hz to 100 kHz Hewlett-Packard8903B

Frequency Accuracy: ±0.3% of setting

Distortion: <-80 dB from20 Hz to 20 kHz; 80 kHz BW

2.7 POWER METER w/ Range: 1 mW @ 50 MHz Hewlett-PackardTHERMISTOR 432A w/478A Opt H73MOUNT Accuracy: ±1.8%

TAR = 1.11:1

2.8 DIGITAL Range: 0 to 1 VDC, Hewlett-PackardVOLTMETER 0.1 µV resolution 3458A

Accuracy: ±0.05%

Range: 100 mV to 10 V

Accuracy: <0.032%

Freq: ≤50 kHz(Min Use Spec)

2.9 RANGE Range: 10 µW to 100 mW Hewlett-PackardCALIBRATOR 11683A

Accuracy: ±0.25%

3 PRELIMINARY OPERATIONS:

3.1 Review and become familiar with entire procedure before beginning Calibration Process.

WARNING

Unless otherwise designated, and prior to beginning the Calibration Process,ensure that all test equipment voltage and/or current outputs are set to zero(0) or turned off, where applicable. Ensure that all equipment switches areset to the proper position before making connections or applying power.

3.2 The TI power requirement is 100, 120, 220, or 240 VAC. Before connecting the TI to a line voltage, assurethe line voltage selection card and fuse match the power source being used.

3.3 Set TI LINE switch to ON.

NOTE

The TI must have a 24 hour warm-up if it has been disconnected from thepower source for less than 24 hours. If TI has been disconnected from the

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power source for 24 hours or more, the TI technically should be warmed up for10 days. This may not be practical. HP experience has shown thatapproximately 85% of new units and 95% of older units will be withinspecifications after a 24 hour warm-up. After a 24 hour warm-up, determine ifthe TI Reference Oscillator is warmed up to meet Aging Rate specifications byperforming the Internal Time Base Aging Rate Test outline in the PerformanceTest of the MTO. If the Aging Rate is ±<5 X 10-10/day, proceed with thecalibration.

3.4 Connect test equipment used to appropriate power source and set POWER switch to ON. Allow sufficientwarm-up period.

3.5 Perform only those portions of the calibration procedure which pertain to the specific instrument beingcalibrated. TI Options covered in this procedure are as follows:

a. Opt 002, This Option provides a high-stability (<1 X 10-9/day) internal reference oscillator in place of the standard reference oscillator. In addition, a 10 MHz time base output is provided on TI rear panel.

b. Opt 030, The High Selectivity measurement option provides the capability to measure single sideband carrier noise (AM or phase) quickly and accurately up to 1.3 GHz with an external LO. (An output for theinternal local oscillator and an input for an external local oscillator signal is provided with these options.)

This option is ordered with one of the following filter options:

1. Opt 032: This option provides a 12.5 kHz adjacent channel filter.

2. Opt 033: This option provides a 25 kHz adjacent channel filter.

3. Opt 035: This option provides a 30 kHz (Cellular Radio) adjacent channel filter.

4. Opt 037: This option provides a carrier noise filter.

3.6 Other TI Options are as follows:

a. Opt 001: This option provides rear panel (instead of front panel) connections for RF INPUT, SENSORinput, MODULATION OUTPUT/AUDIO INPUT, and AF/FM and RF POWER CALIBRATION OUTPUTs.

b. Opt 003: This option provides both an output for the internal local oscillator signal and an input for anexternal local oscillator signal. Both connections are located on the TI rear panel. (This output is provided automatically with option 030 series instruments.)

c. Opt 004: This option allows operation at line frequencies ranging from 48 to 400 Hz. Operations at frequencies greater than 66 Hz is restricted to less than 126.5 VAC line input.

3.7 Due to the Standards available, the Power Reference Output is calibrated to less than the manufacturer'sspecification. Attach a Limited Certification Label annotated: Power Reference Output calibrated to ±2%.

4 CALIBRATION PROCESS:

NOTE

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Unless otherwise specified, verify the results of each test and take correctiveaction whenever the test requirement is not met, before proceeding.

4.1 FREQUENCY ACCURACY AND DISPLAY CALIBRATION:

NOTE

Adjustment of the Time Base Oscillator is normal due to the aging rate of thecrystal. This is common to all Quartz Oscillators. However, in order to ensurethe reliability of the TI, the following action will be taken. If TI passes thefollowing applicable steps, NO ADJUSTMENT ACTION should be enteredinto the Maintenance Data Collection System. If the TI failed, perform theapplicable steps listed in Appendix A and enter appropriate ADJUSTMENTACTION into the Maintenance Data Collection System.

4.1.1 Connect Frequency Standard 10 MHz REF OUT to Frequency Counter EXT FREQ STD INPUT (1-10 MHz)on rear panel of Frequency Counter. Connect TI A11J5 for Std TI or 10 MHz REF OUT for Opt 002 to FrequencyCounter CH A 50 Ω INPUT connector.

4.1.2 Set the Frequency Counter INT STD/EXT STD switch (rear panel) to EXT STD.

NOTE

The values in the following steps are derived from multiplication of theAging Rate to determine the offset at one year. Use these calculated twelvemonth values regardless of the length of the calibration interval for this TI inthe 33K-1-100-1/2.

4.1.3 Adjust Frequency Counter controls as required for a stable display indication and then push RESET.

4.1.4 For TI with firmware version 234.1985 and below: Verify that the Frequency Counter indication is9 999 880 to 10 000 120 Hz ±30 Hz for Std TI or 9 999 996.4 to 10 000 003.6 Hz ±30 Hz for Opt 002.

4.1.5 For all other TI: Verify that the Frequency Counter indication is 9 999 880 to 10 000 120 Hz ±3 Hz for StdTI or 9 999 996.4 to 10 000 003.6 Hz ±3 Hz for Opt 002.

4.1.6 Set the Frequency Counter INT STD/EXT STD switch (rear panel) to INT.

4.1.7 Set all outputs to minimum and disconnect test setup.

4.2 AM CALIBRATION:

4.2.1 On the TI, press Blue key then press INSTR PRESET. Connect the TI CALIBRATION AM/FM OUTPUTto its INPUT.

4.2.2 On the TI, press AM and then press CALIBRATE. Allow at least two readings (approximately 40 seconds)to pass. The display must indicate between 99 and 101%.

4.2.3 Key in 2.2 SPCL to set the AM range to 100% AM. Allow at least two readings to pass. The display mustindicate between 99 and 101%. Record the actual value as the AM Calibration Factor.

4.2.4 On the AM/FM Test Source, set the test mode switch to AM. Connect the AM/FM Test Source AMOUTPUT to the TI INPUT, as in Figure 1. (Nothing must be connected to the AM/FM Test Source AUDIOINPUT).

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4.2.5 On the TI, press FREQ and TRACK MODE. Tune the AM/FM Test Source carrier frequency toapproximately 12.5 MHz. Press TI TRACK MODE again to turn it off.

4.2.6 On the TI, press AM. Key in 2.0 SPCL to set the modulation range to automatic. Set other controls asfollows:

HP FILTER 50 Hz

LP FILTER 3 kHz

DETECTOR AVG

4.2.7 The TI display must indicate 0.01% or less.

4.2.8 Set the Audio Analyzer to 20 kHz. Connect Audio Analyzer OUTPUT to the AUDIO INPUT of the AM/FMTest Source as shown in Figure 1.

AUDIO ANALYZER

MODULATIONOUTPUT/AUDIO INPUT

CALIBRATIONOUTPUT

INPUT AMOUTPUT

AUDIOINPUT

OUTPUT

AUDIO SYNTHESIZERAM/FM TEST SOURCE

TI

AM/FM

INPUT OUTPUT

Figure 1.

NOTE

If the Audio Analyzer has floating input and output connectors, the lowconnector should be grounded. Connections should be made to the high inputand high output connectors.

4.2.9 Set the TI controls as follows:

HP FILTER All off

LP FILTER All off

DETECTOR PEAK +4.2.10 Adjust the Audio Analyzer level for a TI display of 50% AM.

4.2.11 Set the Audio Analyzer to measure the distortion on the 20 kHz signal at the MODULATION OUTPUTwith 80 kHz of low-pass filtering (on the Audio Analyzer). The distortion must be 0.3% or less (-50 dB or less).

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4.2.12 Increase the Audio Analyzer level until the TI indicates 95% AM. Measure the distortion. The distortionmust be 0.6% or less (-44 dB or less).

4.2.13 Set the Audio Analyzer frequency to 20 Hz. Readjust the level, if necessary, for a TI display of 95% AM. Measure the distortion. The distortion must be 0.6% or less.

4.2.14 Decrease the Audio Analyzer level until the TI indicates 50% AM. Measure the distortion. The distortionmust be 0.3% or less.

NOTE

Flatness of the Audio Synthesizer is critical for this test. If the AudioSynthesizer has leveling capability, switch it to ON.

4.2.15 Set the Audio Synthesizer to 1 kHz at +1 dBm. Connect the Audio Synthesizer OUTPUT to the AUDIOINPUT of the AM/FM Test Source. Fine adjust the Audio Analyzer level for a TI indication of 80% AM.

4.2.16 On the TI, press AVG. Press RATIO to turn it on (with LOG/LIN set for a linear display).

4.2.17 Set the Audio Synthesizer frequency as listed in Table 3. For each setting, note and record the TIindication. The difference in readings between any two frequencies must be less than 0.8% REL.

NOTE

±0.3% of reading is equivalent to a difference of 0.6% between any pair ofreadings. ±1 digit at a nominal reading of 80.0 is about ±0.1% of the readingin the RATIO mode or ±0.2% for any pair of readings. The total limit is then0.8%.

Table 3.

Audio Synthesizer Displayed AMFrequency (Hz) (% Rel)

1000

10000

150

90

AM Flatness (Maximum Difference): 0.8% REL

4.2.18 On the TI, press RATIO to turn it off. Press PEAK+. Key in 5.1 SPCL to set the audio detector timeconstant to slow.

4.2.19 Set the Audio Synthesizer frequency to 10 kHz. Set its level for a display of 80% AM times the CalibrationFactor of step 4.2.3. (For example, if the Calibration Factor of step 4.2.3 is 100.4%, set the level for a display of80.3% AM.)

4.2.20 On the TI, key in 80 and press RATIO.

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4.2.21 Set the Audio Synthesizer to the frequencies shown in Table 4 (without changing level). For each setting,the TI display must indicate between the values in the Limits column in Table 4. (±1 digit at a nominal reading of80.0 is about ±1% of the reading in the RATIO mode.)

Table 4.

Audio Synthesizer AM Limits (% Rel)Frequency (Hz) Lower Actual Upper

50 000 98.9 101.1

100 000 96.9 103.1

50 98.9 101.1

20 96.9 103.1

4.2.22 On the TI, key in 3.1 SPCL to set the IF to 455 kHz.

4.2.23 Set the Audio Synthesizer to the frequencies in Table 5. For each setting, the TI must indicate between thevalues in the Limits column in Table 5.

Table 5.

Audio Synthesizer AM Limits (% Rel)Frequency (Hz) Lower Actual Upper

20 96.9 103.1

50 97.9 102.1

10 000 97.9 102.1

4.2.24 On the TI, press RATIO to turn it off. Set the HP FILTER to 50 Hz and the LP FILTER to 3 kHz.

4.2.25 Set the Audio Synthesizer frequency to 1 kHz. Set its level for a TI indication of 50%.

4.2.26 On the TI, press FM. Momentarily disconnect the AUDIO INPUT to the AM/FM Test Source and note theresidual FM displayed on the TI.

4.2.27 Reconnect the AUDIO INPUT of the AM/FM Test Source. Note the TI displayed FM. The displayed FMminus one-half the residual noted in step 4.2.26 must be 20 Hz peak or less. This is the AM Rejection at 455 kHzIF.4.2.28 On the TI, key in 3.0 SPCL to set the IF back to 1.5 MHz. Repeat steps 4.2.26 and 4.2.27 to obtain theResidual FM and AM Rejection at 1.5 MHz IF.

4.2.29 On the TI, press φM. Momentarily disconnect the AUDIO INPUT to the AM/FM Test Source and note theresidual φM displayed on the TI.

4.2.30 Reconnect the AUDIO INPUT of the AM/FM Test Source. Note the TI displayed φM. The displayed φMminus one-half the residual φM noted in step 4.2.29 must be 0.030 radians peak or less. This is the AM Rejectionwith φM at 1.5 MHz IF.

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4.2.31 Set Audio Synthesizer OUTPUT to minimum and disconnect test setup.

4.3 FM CALIBRATION:

NOTE

In the following procedure the RF modulation source can be connected either toa sensor module (which is connected to the Modulation Analyzer) or directly tothe Modulation Analyzer's INPUT connector. The procedure is written for thelatter case.

4.3.1 On the AM/FM Test Source, set the test mode to RESIDUAL FM. Connect AM/FM Test Source LOWRESIDUAL (560 MHz) Output to the TI INPUT, as shown in Figure 2.

AUDIO ANALYZER

CALIBRATIONOUTPUT

INPUT

TI

AM/FM


OUTPUT

AUDIO SYNTHESIZERAM/FM TEST SOURCE

FM 4

LOWRESIDUALOUTPUT

FM 32OUTPUT

INPUT OUTPUT

Figure 2.

4.3.2 On the TI, press the Blue key then press INSTR PRESET (the AUTOMATIC OPERATION key) to presetthe instrument. Set the other controls as follows:

MEASUREMENT FM

HP FILTER 50 Hz

LP FILTER 3 kHz

DETECTOR AVG4.3.3 The TI display must indicate 4 Hz or less. The equation for determining the Residual FM limit is:

Residual FM in Hz = 5.83 X carrier frequency in GHz + 0.42 Hz.

For a carrier of 560 MHz, the Residual FM limit is 3.7 Hz. Allowing for onedigit of uncertainty gives a limit of approximately 4 Hz.

4.3.4 Disconnect the AM/FM Test Source. Connect the TI CALIBRATE AM/FM OUTPUT to the TI INPUT.

4.3.5 On the TI, press CALIBRATE. Allow at least two readings (approximately 40 seconds) to pass. The displaymust indicate between 99 and 101%. Record this value as the FM Calibration Factor at 40 kHz Modulation Rangefor future reference.

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4.3.6 On the TI, key in 2.3 SPCL to set the modulation range to 400 kHz. Allow at least two readings to pass. The display must indicate between 99 and 101%. Record this value as the FM Calibration Factor at 400 kHz forfuture reference. Disconnect cable from TI CALIBRATE AM/FM OUTPUT to TI INPUT.

4.3.7 On the AM/FM Test Source, set the test mode to FM. Connect AM/FM Test Source FM÷4 OUTPUT to theTI INPUT.

4.3.8 Set the Audio Analyzer to 10 kHz at 1 V. Connect Audio Analyzer OUTPUT to the AUDIO INPUT of theAM/FM Test Source.

NOTE

If the Audio Analyzer has floating input and output connectors, the lowconnector should be grounded. Connections should be made to the high inputand high output connectors.

4.3.9 On the TI, press FREQ and TRACK MODE. Tune the AM/FM Test Source carrier frequency toapproximately 100 MHz. Press TI TRACK MODE again to turn it off.

4.3.10 On the TI, press FM. Set LP FILTER to 15 kHz and DETECTOR to AVG. Key in 2.0 SPCL to set themodulation range to automatic.

4.3.11 Adjust the Audio Analyzer for a TI display of 20 kHz average deviation. On the TI, set RATIO to on andto %. (If not %, press LOG/LIN Key.)

4.3.12 Connect the FM÷32 OUTPUT of the AM/FM Test Source to the TI INPUT without disturbing the AM/FMTest Source controls.

4.3.13 Multiply the displayed ratio on the TI by the Calibration Factor of step 4.3.5. (For example, if the displayindicates 12.52% REL and the Calibration Factor of step 4.3.5 is 100.4%, the result is 12.52 X 100.4% = 12.57%REL.) The result must be between 12.35 and 12.65% REL. This is the FM Accuracy at 4 kHz Modulation Range.

4.3.14 Disconnect cable from the FM ÷ 32 OUTPUT of the AM/FM Test Source and reconnect to the FM÷4OUTPUT of the AM/FM Test Source.

4.3.15 On the TI, set all LP FILTERS to off, DETECTOR to PEAK+, and RATIO off.

4.3.16 Set the Audio Analyzer frequency to 100 kHz. Set the level for a TI display 100 kHz peak deviation.

4.3.17 Connect the Audio Analyzer INPUT to the TI MODULATION OUTPUT/AUDIO INPUT. Set the AudioAnalyzer to measure the distortion on the 100 kHz signal at the MODULATION OUTPUT (all Audio Analyzerfilters must be off). The FM Distortion must be 0.1% or less (-60 dB or less). Disconnect Audio Analyzer from TIMODULATION OUTPUT/AUDIO INPUT.

4.3.18 Set the Audio Synthesizer to 10 kHz at +5 dBm. Connect Audio Synthesizer OUTPUT to the AUDIOINPUT of the AM/FM Test Source. Fine adjust the level for a TI display of 100 kHz times the Calibration Factorof step 4.3.6. (For example, if the Calibration Factor of step 4.3.6 is 100.4%, set the level for a display of100.4 kHz.)

NOTE

Flatness of the Audio Synthesizer is critical for this test. If the AudioSynthesizer has leveling capability, switch it ON.

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4.3.19 Set the Audio Synthesizer to the frequencies in Table 6. For each setting, the TI display must indicatebetween the limits indicated in Table 6.

Table 6.

Audio Synthesizer FM Limits (kHz)Frequency (Hz) Lower Actual Upper

50 000 98.9 101.1

100 000 94.9 105.1

50 98.9 101.1

20 94.9 105.1

4.3.20 On the TI set HP FILTER to 50 Hz and LP FILTER to 3 kHz.

4.3.21 Set the Audio Synthesizer to 1 kHz. Set the level for a TI display of 50 kHz peak deviation.

4.3.22 On the TI, press AM. Momentarily disconnect the AUDIO INPUT to the AM/FM Test Source and note theresidual AM displayed on the TI.

4.3.23 Reconnect the AUDIO INPUT of the AM/FM Test Source. Note the AM displayed on the TI. Thedisplayed AM minus one-half of the residual AM noted in step 4.3.22 must be 0.2% or less. This is the FMRejection at 1 kHz Rate; 50 kHz Peak Deviation.

4.3.24 Connect the FM÷32 OUTPUT of the AM/FM Test Source to the TI INPUT.

4.3.25 On the TI, key in 3.1 SPCL to set the IF to 455 kHz. Press FM.

4.3.26 Set the Audio Synthesizer level for a TI display of 5 kHz peak deviation.

4.3.27 On the TI press AM. Momentarily disconnect the AUDIO INPUT to the AM/FM Test Source and note theresidual AM displayed on the TI.

4.3.28 Reconnect the AUDIO INPUT of the AM/FM Test Source. Note the AM displayed on the TI. Thedisplayed AM minus one-half the residual AM noted in step 4.3.27 must be 0.2% or less. This is the FM Rejectionat 1 kHz; 5 kHz Peak Deviation.

4.3.29 On the TI press FM. Set all HP FILTERS to off and LP FILTERS to >20 kHz.

4.3.30 Set the Audio Synthesizer level for a TI display of 10 kHz peak deviation times the Calibration Factor instep 4.3.5. (For example, if the Calibration Factor of step 4.3.5 is 100.4%, set the level for a display of 10.04 kHz.)

4.3.31 Set the Audio Synthesizer to the frequencies shown in Table 7. For each setting, the TI display mustindicate between the limits indicated in Table 7.

Table 7.

Audio Synthesizer FM Limits (kHz)

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Frequency (Hz) Lower Actual Upper

10 000 9.79 10.21

20 9.79 10.21

4.3.32 Set the Audio Analyzer to 10 kHz at 4 V. Connect Audio Analyzer OUTPUT to the AUDIO INPUT of theAM/FM Test Source. Fine adjust the Audio Analyzer level for a TI display of 10 kHz peak deviation.

4.3.33 Set the Audio Analyzer to measure the distortion on the 10 kHz signal at the MODULATIONOUTPUT/AUDIO INPUT of the TI.

4.3.34 Set the Audio Analyzer LOW-PASS FILTER to 30 kHz and the HIGH-PASS FILTER to 400 Hz. The FMDistortion must be less than 0.1% (-60 dB or less). This is the FM Distortion at 10 kHz; 10 kHz Peak Deviation.

4.3.35 Set all Output levels to minimum and disconnect test setup.

4.4 PHASE MODULATION CALIBRATION:

4.4.1 Perform FM Calibration, para 4.3, before checking φM.

4.4.2 On the AM/FM Test Source, set the test mode to FM. Connect AM/FM Test Source FM Output to the TIINPUT as in Figure 3.

FMOUTPUT

OUTPUT

AUDIOINPUT

FM 32OUTPUT


FM 32OUTPUT

INPUT

OUTPUT

TIAUDIO ANALYZER

AM/FMTEST SOURCE AUDIO SYNTHESIZER

INPUT

Figure 3.4.4.3 Set the Audio Synthesizer to 200 Hz at -10 dBm. Connect Audio Synthesizer OUTPUT to the AUDIOINPUT of the AM/FM Test Source.

4.4.4 On the TI, press the Blue key then press INSTR PRESET (the AUTOMATIC OPERATION key) to presetthe instrument. Press FREQ and TRACK MODE. Tune the AM/FM Test Source carrier frequency toapproximately 400 MHz. Press TI TRACK MODE again to turn it off.

4.4.5 Set TI controls as follows:

MEASUREMENT FM

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LP FILTER >20 kHz

DETECTOR AVG

HP FILTER 50 Hz

4.4.6 Set the Audio Synthesizer frequency as shown in Table 8. Set its level to give the FM deviation shown inthe table (as displayed on the TI). After setting each FM deviation, press φM. Switch TI High Pass Filter asrequired to complete Table 8. For each setting, the TI display must indicate between the limits indicated inTable 8.

Table 8.

Audio TI Average φφM Limits (RAD)Synthesizer High Pass DeviationFrequency (Hz) Filter (kHz) Lower Actual Upper

200 50 Hz 50 242.4 257.6

1 000 300 Hz 250 242.4 257.6

20 000 300 Hz 250 12.0 13.0

20 000 300 Hz 4* 0.193 0.207

*Connect the FM÷32 OUTPUT of the AM/FM Test Source to the TI INPUT to make this measurement. Press AUTOMATIC OPERATION, then MHz to retune the TI. If the resolution is not 0.001 rad, press φMagain.

4.4.7 On the TI key in 3.1 SPCL to set the IF to 455 kHz. Press FM. On the AM/FM Test Source, connect theFM÷4 OUTPUT to TI INPUT. On the TI press AUTOMATIC OPERATION, then MHz to retune the TI.

4.4.8 Set the Audio Synthesizer frequency as shown in Table 9. Set its level to give the average deviation shownin Table 9. After each FM deviation, press φM. Switch TI High Pass Filter as required to complete Table 9. Foreach setting, the TI display must indicate between the limits listed in Table 9.

Table 9.

Audio TI Average φφM Limits (RAD)Synthesizer High Pass DeviationFrequency (Hz) Filter (kHz) Lower Actual Upper

10 000 300 Hz 25 2.39 2.61

10 000 300 Hz 2.5 0.239 0.261

1 000 300 Hz 25 24.0 26.0

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200 50 Hz 5 24.0 26.0

4.4.9 Connect the FM OUTPUT of the AM/FM Test Source to the TI INPUT. Press AUTOMATIC OPERATIONon the TI.

4.4.10 Set the Audio Analyzer to 1 kHz. Connect Audio Analyzer OUTPUT to the AUDIO INPUT of the AM/FMTest Source.

4.4.11 On the TI, press φM. Set DETECTOR to PEAK+. Set HP FILTER to 300 Hz. Set LP FILTER to 15 kHz.

4.4.12 Adjust the Audio Analyzer level to give a display of 400 radians peak deviation.

4.4.13 Connect the Audio Analyzer INPUT to the TI MODULATION OUTPUT/AUDIO INPUT. Set the AudioAnalyzer to measure the distortion on the 1 kHz signal at the MODULATION OUTPUT. Set the Audio Analyzer400 Hz HP FILTER to on. The distortion must be 0.1% or less.

4.4.14 Reduce the Audio Analyzer level to give a display of 40 rad peak deviation.

4.4.15 On the TI, key in 3.1 SPCL. The distortion measured on the Audio Analyzer must be 0.1% or less.

4.4.16 Set Audio Analyzer Output to minimum and disconnect test setup.

4.5 AUDIO FILTER CALIBRATION:

4.5.1 Connect equipment as shown in Figure 4.

AUDIO SYNTHESIZER

TI

INPUT OUTPUT

INPUTAUDIOINPUT

AM/FMTEST SOURCE

FM 4OUTPUT

AUDIOOUTPUT

Figure 4.

NOTE

Flatness of the Audio Synthesizer is critical for this test. If the AudioSynthesizer has leveling capability, switch it ON.

4.5.2 On the AM/FM Test Source, set the test mode to FM.4.5.3 Set the Audio Synthesizer to 200 Hz at +6 dBm.

4.5.4 On the TI, press the Blue key then press INSTR PRESET (the AUTOMATIC OPERATION key) to presetthe instrument. Press FREQ and TRACK MODE. Tune the AM/FM Test Source carrier frequency toapproximately 100 MHz. Press TI TRACK MODE again to turn it off.

4.5.5 On the TI, press MHz to center the tuning. Set other controls as follows:

MEASUREMENT FM

DETECTOR AVG

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4.5.6 Set the Audio Synthesizer level to give a display of approximately 25 kHz average deviation.

4.5.7 Set the Audio Synthesizer frequency to the frequencies shown in Table 10. For each setting, set RATIO onthe TI to off, set all HP and LP FILTERS to OFF; then set RATIO to on (with LOG/LIN set for a linear display),and insert the filter indicated. For each setting, the TI display must indicate between the limits of Table 10.

Table 10.

Audio Ratio Limits (% Rel)SynthesizerFrequency (Hz) Filter Lower Actual Upper

200 50 Hz HP FILTER 98.99 101.01

2 000 50 Hz HP FILTER 98.99 101.01

1 000 300 Hz HP FILTER 98.99 101.01

10 000 300 Hz HP FILTER 98.99 101.01

1 000 3 kHz LP FILTER 98.99 101.01

100 3 kHz LP FILTER 98.99 101.01

10 000 15 kHz LP FILTER 98.99 101.01

1 000 15 kHz LP FILTER 98.99 101.01

10 000 >20 kHz LP FILTER 98.99 101.01

1 000 >20 kHz LP FILTER 98.99 101.01

4.5.8 Set Audio Synthesizer OUTPUT to minimum and disconnect test setup.

4.6 AUDIO RMS LEVEL CALIBRATION:

4.6.1 On the TI, press the Blue key, the INSTR PRESET (AUTOMATIC OPERATION key) key, and then key in30.0 SPCL.

4.6.2 Set the Audio Analyzer output to 50 Hz at 3 V rms. On the Audio Analyzer key in 10.0 SPCL to display theoutput settings.

4.6.3 On the Audio Analyzer connect the HIGH OUTPUT to the TI MODULATION OUTPUT/AUDIO INPUT. Set the Audio Analyzer OUTPUT FLOAT/GND to GND.

4.6.4 Set the Audio Analyzer to the frequencies shown in Table 11. The TI must indicate within the limits listedin Table 11 for each frequency setting.

Table 11.

Audio Analyzer Level Limits (V rms)Frequency (Hz) Lower Actual Upper

50 2.88 3.12

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500 2.88 3.12

5 000 2.88 3.12

40 000 2.88 3.12

4.6.5 Set the Audio Analyzer output level to 100 mV.

4.6.6 Set the Audio Analyzer to the frequencies shown in Table 12. The TI must indicate within the limits listedin Table 12 for each frequency setting.

Table 12.

Audio Analyzer Level Limits (mV rms)Frequency (Hz) Lower Actual Upper

40 000 96 104

5 000 96 104

500 96 104

50 96 104

4.6.7 Set the Audio Analyzer output to minimum and disconnect the test setup.

4.7 AUDIO FREQUENCY COUNTER CALIBRATION:

4.7.1 On the TI press S (shift) and the AUDIO FREQ.

4.7.2 Connect the Audio Synthesizer Output to the TI MODULATION OUTPUT/AUDIO INPUT.

4.7.3 Set the Audio Synthesizer to the frequencies and output levels shown in Table 13. The TI must indicatewithin the limits shown in Table 13 for each applied frequency and output level.

Table 13.

Audio Synthesizer Limits (kHz)Frequency (Hz) Level (dBm) Lower Actual Upper

20 +8 0.01998 0.02002

20 -13.0 0.01998 0.02002

1 000 -13.0 0.99997 1.00003

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1 000 +8 0.99997 1.00003

250 000 +8 249.997 250.003

250 000 -13.0 249.997 250.003

4.7.4 Set Audio Synthesizer to minimum and disconnect from TI.

4.8 AUDIO DISTORTION CALIBRATION:

4.8.1 Connect Audio Analyzer HIGH OUTPUT to TI AUDIO INPUT. Set the Audio Analyzer to 380 Hz at-13.0 dBm.

4.8.2 On the TI, press S (shift) then AUDIO DISTN. On the TI press the Blue key and the 400 Hz DISTN (thePEAK- key).

4.8.3 Slowly step the Audio Analyzer up in frequency to 420 Hz using 2 Hz steps or finer. The highest displayeddistortion reading on the TI must not exceed 0.3%.

4.8.4 On the Audio Analyzer set the output level to +11.76 dBm.

4.8.5 Slowly step the Audio Analyzer down in frequency to 380 Hz using 2 Hz steps or finer. The highestdisplayed distortion reading on the TI must not exceed 0.3%.

4.8.6 On the Audio Analyzer set the frequency to 950 Hz.

4.8.7 On the TI, press the Blue key and then press 1 kHz DISTN (the PEAK+ key).

4.8.8 Slowly step the Audio Analyzer up in frequency to 1050 Hz using 5 Hz steps or finer. The highest displayeddistortion reading on the TI must not exceed 0.3%.

4.8.9 On the Audio Analyzer set the output level to -13.0 dBm.

4.8.10 Slowly step the Audio Analyzer down in frequency to 950 Hz using 5 Hz steps or finer. The highestdisplayed distortion reading on the TI must not exceed 0.3%.

4.8.11 Connect the Audio Synthesizer OUTPUT to the Audio Analyzer LOW OUTPUT.

4.8.12 On the Audio Analyzer set the OUTPUT FLOAT/GND to FLOAT. Set the Audio Analyzer oscillatorfrequency to 1 kHz at 1 V rms.

NOTE

The Audio Synthesizer is connected to the floating low output of the AudioAnalyzer output. This has the effect of summing the two outputs.

4.8.13 On the Audio Synthesizer set frequency to 2 kHz at a level as low as possible without switching theinstrument off, but less than -50 dBm.

4.8.14 On the TI key in 30.0 SPCL to set to measure external audio rms level. On the TI set the RATIO to on.

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4.8.15 On the Audio Analyzer set the oscillator level to 0 V or as low as possible without switching the instrumentoff, but at most 10 mV rms.

4.8.16 On the Audio Synthesizer increase the output level until the TI indicates within 99 to 101%.

4.8.17 On the Audio Synthesizer set the output level down exactly 40 dB.

4.8.18 On the Audio Analyzer set the oscillator level back to 1 V rms.

4.8.19 On the TI, press S (shift) and then AUDIO DISTN.

4.8.20 On the Audio Synthesizer set the frequency to the values shown in Table 14 without changing the AudioSynthesizer output level. The TI must indicate within the limits shown in Table 14 for each frequency setting.

Table 14.

Audio Synthesizer Distortion Limits (%)Frequency (kHz) Lower Actual Upper

2 0.89 1.12

3 0.89 1.12

4 0.89 1.12

5 0.89 1.12

4.8.21 On the Audio Analyzer set the oscillator frequency to 400 Hz without changing the output level.

4.8.22 On the TI, press the Blue key and then press 400 Hz DISTN.

4.8.23 On the Audio Synthesizer set the frequency to the values shown in Table 15 without changing the AudioSynthesizer output level. The TI must indicate within the limits shown in Table 15 for each frequency setting.

Table 15.

Audio Synthesizer Distortion Limits (%)Frequency (Hz) Lower Actual Upper

800 0.89 1.12

1200 0.89 1.12

1600 0.89 1.12

2000 0.89 1.12

4.8.24 Set all outputs to minimum and disconnect the test set-up.

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4.9 POWER REFERENCE CALIBRATION:

4.9.1 Connect equipment as shown in Figure 5. The input of the Digital Multimeter must be floating. Thepositive input of the Digital Multimeter must be connected to the rear-panel VCOMP jack of the Power Meter, thenegative input to the VRF jack.

4.9.2 On the TI, key in 45.0 SPCL to switch the Power Reference OFF.

4.9.3 Set the Power Meter RANGE to COARSE ZERO and adjust the front-panel COARSE ZERO to obtain azero meter indication.

4.9.4 Fine zero the Power Meter on the most sensitive range, then set the RANGE switch to 1 mW (0 dBm).

4.9.5 Observe the voltage reading on the Digital Multimeter. If the reading is greater than 400 µV, press and holdthe FINE ZERO switch on the Power Meter and adjust COARSE ZERO so the Digital Multimeter indicates lessthan 200 µV. Then release the FINE ZERO switch. Record the Digital Multimeter reading as V0.

TI

NEG

POS

V COMP VRFRF POWEROUTPUT

THERMISTORMOUNT

DIGITAL MULTIMETER

POWERMETER

Figure 5.

NOTE

Steps 4.9.5, 4.9.6, and 4.9.7 must be performed as quickly as possible toprevent drift.

4.9.6 On the TI, key in 45.16 SPCL. Record the Digital Multimeter reading as V1.

4.9.7 Connect the Digital Multimeter to read VCOMP (with respect to ground) on the Power Meter. (The DigitalMultimeters negative input must connect to chassis ground). Record the Digital Multimeter reading as VCOMP. Key in 45.0 SPCL to switch OFF Power Reference.

4.9.8 Compute the TI POWER REFERENCE output utilizing the following formula:

Where: V0 = Value recorded in step 4.9.5

V1 = Value recorded in step 4.9.6

VCOMP = Value recorded in step 4.9.7

PRF = 1.25 2 VCOMP (V1 - V0 ) + (V 0 - V 1 )

CF

2 2

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CF = Cal Factor of STANDARD MOUNT @ 50 MHz

4.9.9 The computed power must be between 0.98 and 1.02 mW.

NOTE

The Power Reference Output accuracy for the TI as specified by themanufacture is ±1.2% worst case. However, the best accuracy obtainableutilizing standards listed in this procedure is ±2.0%. Therefore, a LimitedCertification Label must be annotated to show the TI Power Reference Outputis calibrated to less than specification.

4.9.10 Disconnect test setup.

4.10 POWER METER CALIBRATION: (ZERO SET)

4.10.1 Connect the Power Meter OUTPUT of the Range Calibrator to the TI SENSOR INPUT.

4.10.2 On the Range Calibrator, set the FUNCTION to STANDBY, POLARITY to NORMAL and RANGE to1 mW.

4.10.3 On the TI, press the Blue key then press INSTR PRESET (the AUTOMATIC OPERATION key) to presetthe instrument. Press RF POWER. Press ZERO and wait for the instrument to zero.

NOTE

If Error 15 is displayed, press 100 then the Blue key, then the % CALFACTOR key (the MHz key) to enter a dummy calibration factor of 100%.

4.10.4 On the TI, key in the Special Functions listed in Table 16. For each setting the TI indication must be lessthan the maximum shown in Table 16 for your *S/N TI. Take the average of several readings.

Table 16.

Power ReadingSpecial Functions Actual Maximum

*Serial Prefix 10.1 0.06 µW2305A to 2450A

10.2 0.1 µW

10.3 0.001 µW

10.4 0.01 mW

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10.5 0.1 mW

*Serial Prefix 10.1 0.051 µW2451A and above

10.2 0.06 µW

10.3 0.2 µW

10.4 0.001 mW

10.5 0.01 mW

4.10.5 To check Range-to-Range Error, set the Range Calibrator FUNCTION switch to CALIBRATE.

4.10.6 On the TI, key in 10.0 SPCL to set the Power Meter ranging to automatic. Press CALIBRATE, then pressthe Blue key, then press SAVE CAL (again, the CALIBRATE key). This normalizes the power reading to 1 mW.

4.10.7 Set the Range Calibrator RANGE to 10 µW.4.10.8 On the TI, key in the Special Functions listed in Table 17. For each setting, set the Range Calibrator to therange indicated in the table. The reading on the TI must be within the Limits shown in Table 17.

Table 17.

RangeSpecial CalibratorFunctions Range Minimum Actual Maximum

10.1 10 µW 9.90 µW 10.10 µW

10.2 100 µW 99.4 µW 100.6 µW

10.4 10 mW 9.94 mW 10.06 mW

10.5 100 mW 99.0 mW 101.0 mW

4.10.9 Set the Range Calibrator RANGE to 1 mW.

4.10.10 On the TI, key in 10.3 SPCL. Set the Range Calibrator's RANGE to 100 µW. The TI display mustindicate between 0.099 and 0.101 mW (0.100 mW ±0.5% ±1 digit, then rounded to the nearest 0.001 mW). ForS/N 2451A and above, TI must indicate between 99 and 101 µW.

4.10.11 Disconnect test setup.

4.11 HIGH-SELECTIVITY FILTER CALIBRATION:

NOTE

This procedure calibrates only TI with the 12.5 kHz Adjacent Channel Filter (Option 032)or 25 kHz Adjacent Channel Filter (Option 033) or both. Depending on the combinationof these filters with the other available filter Options (Options 035 and 037), eitherfilter can be defined as the "wide" or "narrow" filter with regards to Special Function 24,which is used in these steps. Follow the steps which apply to the TIs particular filter combination.

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4.11. 1 WIDE FILTER CALIBRATION: (Option Combination 032 and 037)

4.11.1.1 Set the Audio Synthesizer for a 455.0 kHz CW output at +3 dBm. Connect the Audio SynthesizerOUTPUT to the TI INPUT.

4.11.1.2 On the TI key in the following:

A.) Press the Blue key and then press INSTR PRESET (the AUTOMATIC OPERATION key).

B.) Key in 100 MHz to inhibit automatic tuning.

C.) Key in 24.0 SPCL to initialize the high-selectivity level measurement.

D.) Key in 3.1 SPCL to remove the RF input high-pass filter.

E.) Key in 24.1 SPCL to read the IF level.

4.11.1.3 Slowly tune the frequency of the Audio Synthesizer up and down until the peak reading is found.

4.11.1.4 On the TI, key in 24.1 SPCL and 24.2 SPCL to establish and display the current IF level as a levelreference. (The TI must display 0 dB.)

4.11.1.5 Tune the Audio Synthesizer frequency down until the first minimum is found. The TI display mustindicate within -2 to 0 dB.

4.11.1.6 Tune the Audio Synthesizer frequency down until the TI display indicates -6.00 dB. Record the AudioSynthesizer frequency as the lower 6 dB frequency.

4.11.1.7 Tune the Audio Synthesizer down 1.6 kHz. The TI display must indicate -30 dB or less. (more negative)

4.11.1.8 Tune the Audio Synthesizer down another 3 kHz. The TI display must indicate -80 dB or less.

4.11.1.9 Tune the Audio Synthesizer frequency up until the TI display indicates 0 dB, then continue on until theTI display indicates -6.00 dB. Record the Audio Synthesizer frequency as the upper 6 dB frequency.

4.11.1.10 Subtract the upper 6 dB frequency of step 4.11.1.9 from the lower 6 dB frequency of step 4.11.1.6. Thedifference is the 12.5 kHz filter 6 dB Bandwidth and must be between 6.4 and 10.4 kHz.4.11.1.11 Tune the Audio Synthesizer up 12 kHz above the frequency recorded in step 4.11.1.6. The TI displaymust indicate -30 dB or less.

4.11.1.12 Tune the Audio Synthesizer up another 3 kHz. The TI display must indicate -80 dB or less.

4.11.1.13 Disconnect test setup. Set the Audio Synthesizer output level to minimum.

4.11.2 WIDE FILTER CALIBRATION: (Option Combination 032 and 033 or 033 and 037)




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4.11.2.6 Tune the Audio Synthesizer frequency down until the TI display indicated -6.00 dB. Record the AudioSynthesizer frequency as the lower 6 dB frequency.




4.11.2.10 Subtract the upper 6 dB frequency of step 4.11.2.9 from the lower 6 dB frequency of step 4.11.2.6. Thedifference is the 25 kHz filter 6 dB Bandwidth and must be between 12.4 and 16.9 kHz.

4.11.2.11 Tune the Audio Synthesizer up 18.5 kHz above the frequency recorded in step 4.11.2.6. The TI displaymust indicate -30 dB or less.



4.11.3 NARROW FILTER CALIBRATION: (Option Combination 032 and 033 or 032 and 035)








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4.11.3.10 Subtract the upper 6 dB frequency of step 4.11.3.9 from the lower 6 dB frequency of step 4.11.3.6. Thedifference is the 12.5 kHz filter 6 dB Bandwidth and must be between 6.4 and 10.4 kHz.

4.11.3.11 Tune the Audio Synthesizer up 12 kHz above the frequency recorded in step 4.11.3.6. The TI displaymust indicate -30 dB or less.



4.11.4 NARROW FILTER CALIBRATION: (Option Combination 033 and 035)




B.) Key in 100 MHz to inhibit automatic tuning.C.) Key in 24.0 SPCL to initialize the high-selectivity level measurement.







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4.11.4.10 Subtract the upper 6 dB frequency of step 4.11.4.9 from the lower 6 dB frequency of step 4.11.4.6. Thedifference is the 25 kHz filter 6 dB Bandwidth and must be between 12.4 and 16.9 kHz.

4.11.4.11 Tune the Audio Synthesizer up 18.5 kHz above the frequency recorded in step 4.11.4.6. The TI displaymust indicate -30 dB or less.



4.12 HIGH-SELECTIVITY GAIN CALIBRATION: (Option Series 030)

4.12.1 Set the Audio Synthesizer for a 455.0 kHz CW output at +3 dBm. Connect the Audio SynthesizerOUTPUT to the TI INPUT.

4.12.2 On the TI key in the following:




D.) Key in 3.1 SPCL to remove the RF input high-pass filter.E.) Key in 24.1 SPCL to read the IF level.

F.) Key in 49.C SPCL (C is yellow shift key and digit 2) to select and display the output of the IF rms detector and to inhibit IF ranging for TI S/N 2642A and above. For TI S/N 2314A to 2636A key in 50.6 SPCL to select and display the output of the IF rms detector and to inhibit IF ranging.

4.12.3 Adjust the Audio Synthesizer output level for a TI displayed indication of 2.500.

4.12.4 Decrease the Audio Synthesizer output level by exactly 5 dB. Divide the TI displayed indication by 1.406and record the result. (IF RMS Detector Linearity.)

4.12.5 On the TI S/N 2642 and above, key in 0.390 SPCL, 0.3 S (shift) 4 S 4 SPCL, and 0.3 S 30 SPCL to set theIF gain to 0 dB, then key in 49.C SPCL. On TI S/N 2314A to 2636A key in 0.250 SPCL,0.2 S (SHIFT) 4 S 4SPCL, and 0.2 S 30 SPCL to set the IF gain to 0 dB, then key in 50.6 SPCL.

4.12.6 Adjust the Audio Synthesizer output level for a TI display indication of 1.000.

4.12.7 Decrease the Audio Synthesizer output level by the exact amount indicated in Table 18 for your *S/N TI. For each level listed, key in the TI Special Functions listed for your *S/N TI, then on the TI, key in 49.C SPCL forS/N 2642 and above, or 50.6 SPCL for TI S/N 2314A to 2636A. Multiple the displayed TI result by the valuerecorded in step 4.12.4. The computed results must be within the Limits listed in Table 18 for your *S/N TI.(±0.5 dB)

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Table 18.

Decrease inAudio Synthesizer Special Displayed Limits of Computed ResultsLevel (dB) Functions Level Lower Actual Upper

*S/N 2642A and above

5 0.3 S 4 S 3 0.944 1.059

5 0.3 S 4 S 1 0.944 1.059

5 0.3 S 4 7 0.944 1.059

5 0.3 S 4 S 4, 0.391 0.944 1.059

0 0.392 0.944 1.059

0 0.394 0.944 1.059

5 0.2 S 4 S 3 0.944 1.059

5 0.2 S 4 S 1 0.944 1.059

5 0.2 S 4 7 0.944 1.059

5 0.2 S 4 S 4, 0.251 0.944 1.059

0 0.252 0.944 1.059

0 0.254 0.944 1.059

0 0.250, 0.2 S 31 0.944 1.059

4.12.8 Set all STANDBY/POWER switches to OFF or STANDBY. Disconnect and secure all equipment.

4.12.9 Attach a Limited Certification Label as per step 3.7.

CALIBRATION PERFORMANCE TABLE

Not Required

33K3-4-3118-1

A-1/(A-2 Blank)

APPENDIX A

A-1 TIME BASE ADJUSTMENT: (Room Temperature Crystal Oscillator (RTXO) STD TI)

A-1.1 Connect TI A11J5 to Electronic Counter CH A 50 Ω INPUT connector.

A-1.2 Adjust Electronic Counter for a stable display.

A-1.3 Adjust A11C14 (10 MHz REF) for an indication of 10 MHz ±30 for TI with firmware revision 234.1985and below or 10 MHz ±3 Hz for all other TI.

A-1.4 Allow TI 10 MHz Oscillator a minimum of one (1) hour to stabilize. Repeat step A-1.3 as required.

A-1.5 Disconnect equipment and continue with para 4.1.

A-2 TIME BASE ADJUSTMENT: (Oven Controlled Crystal Oscillator (TCXO) Opt 002)

A-2.1 Connect Frequency Standard 10 MHz FREQ OUT to Frequency Difference Meter (FDM) REF INPUT. Connect TI rear panel 10 MHz REF OUT to the FDM SIG INPUT connector.

A-2.2 Standardize the FDM as required. Set FDM METER RANGE switch as required for an on scale indicationon the FDM.

A-2.3 Adjust TI OSC ADJ, as required for lowest possible null on the FDM meter.

A-2.4 Allow TI 10 MHz Oscillator a minimum of 1 hour to stabilize and repeat steps A-3.3 and A-3.4 as required.

A-2-5 Disconnect equipment from TI and continue with para 4.1.

Documents

(HEWLETT-PACKARD) - hieuchuan.com.vnhieuchuan.com.vn/wp-content/uploads/Modul-8901b.pdf · T.O. 33K3-4-3118-1 1 MODULATION ANALYZER 8901B (HEWLETT-PACKARD) 1 CALIBRATION DESCRIPTION: