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F(t) = sin wt + 1 /3 sin 3wt + 1 /5 sin 5wt

Time

LinearNetwork

Frequency Frequency Frequency

Magnitude

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40 dB (.010)

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Measurement uncertainty:

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= 14.1 dB (-1.9 dB)

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1

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Measurement uncertainty

= 1 (.020+.020+.032)

= 1 .072

= + 0.60 dB

- 0.65 dB

DUT

1 dB loss (.891)

16 dB RL (.158)

Total measurement uncertainty:

+0.60 + 0.22 = +0 .82 dB

-0.65 - 0.22 = - 0.87 dB

Load match = 18

dB (.126)



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G%LQVWHDGRIG%DVZHOODVWKHWZRPHDVXUHPHQWHUURUWHUPVWKDWLQYROYHLQWHUDFWLRQZLWKWKHHIIHFWLYHVRXUFHPDWFK2XUWRWDOPHDVXUHPHQWHUURULVQRZG%LQVWHDGRIWKHSUHYLRXVO\FDOFXODWHGG%

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7UDQVPLVVLRQ0HDVXUHPHQWVXVLQJWKH(QKDQFHG5HVSRQVH&DOLEUDWLRQ


= 1 (.020+.0018+.0028)

= 1 .0246

= + 0.211 dB

- 0.216


0.22 + .02 = 0.24 dB


= (1 )S L

= (1 (.0178)(.126)

= .02 dB

(IIHFWLYHVRXUFHPDWFKG%


(.0178)

1

(.126)(.158) = .020

(.126)(.891)(.0178)(.891) = .0018

DUT

1 dB loss (.891)

16 dB RL (.158) Load match = 18

dB (.126)

(.158)(.0178) = .0028



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G%DQGRXUWRWDOPHDVXUHPHQWXQFHUWDLQW\KDVEHHQUHGXFHGWRG%7KLVLVYHU\FORVHWRZKDWFDQEHDFKLHYHGZLWKWZRSRUWHUURUFRUUHFWLRQ$VZHKDYHVHHQDGGLQJDKLJKTXDOLW\DWWHQXDWRUWRSRUWWZRRID75

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= 1 (.006+.0005+.0028)

= 1 .0093

= 0.08 dB


0.01 + .08 = 0.09 dB


= (1 )S L

= (1 (.0178)(.0366)

= .01 dB


(.0178)

1

(.0366)(.158) = .006

(.0366)(.891)(.0178)(.891) = .0005

DUT

1 dB loss (.891)

16 dB RL (.158) Effective load match = (.316 x .316 x .126 + .024)

= .0366 (28.7dB)

(.158)(.0178) = .0028

10 dB attenuator (.316)

SWR = 1.05 (.024 or 32.4 dB)

Analyzer load match =18 dB (.126)



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+0.44 + 0.22 = + 0.66 dB

-0.46 - 0.22 = - 0.68 dB


= 1 (.020+.032)

= 1 .052

= + 0.44 dB

- 0.46 dB

1

(.126)(.158) = .020

DUT

16 dB RL (.158)

(.158)(.200) = .032


(.200)Load match = 18

dB (.126)



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1 dB loss (.891)

16 dB RL (.158)

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= 0.891 .0056 = 1 dB 0.05 dB (worst-case)

5HIOHFWLRQXQFHUWDLQW\

= 0.158 .0088 = 16 dB +0.53 dB, -0.44 dB (worst-case)

S S E S E S S E S E m a D a S a a L a RT 11 11 11

2

21 12 11

2 2

1

0158 0045 0158 0158 0 891 0045 0158 0022

= + + +

= + + +

( ( ))

. (. . *. . *. . *. )

S S S E S S E S S E E S E E m a a I a a S a a S L a L TT 21 21 21 21 11 21 12 226 2

1

0 891 0 891 10 0 891 0158 0158 0 891 0158 0045 0158 0045 003

= + + + +

= + + + +( / ( ))

. . ( / . . *. . *. *. . *. . )



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CH1 S21&M log MAG 1 dB/ REF 0 dB

Cor

CH2 MEM log MAG REF 0 dB1 dB/

CorUncorrected

After two-port calibration

START 2 000.000 MHz STOP 6 000.000 MHzx21 2

After response calibration

0HDVXULQJILOWHULQVHUWLRQORVV



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Example distribution ofimpedance states for reflectioncalibration at one frequency

1

12

7

5

HP 85062A

Electronic CalibrationModule 1 - 26.5 GHz



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DUTPort 1 Port 2

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Port 1 Port 2Adapter

A

Adapter

BPort 1 Port 2

Adapter

BPort 1 Port 2DUT

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1. Perform 2-port cal with adapter on port 2.

Save in cal set 1.

2. Perform 2-port cal with adapter on port 1.

Save in cal set 2.

4. Measure DUT without cal adapter.

3. Use ADAPTER REMOVAL

to generate new cal set.

[CAL] [MORE] [MODIFY CAL SET]

[ADAPTER REMOVAL]

DUTPort 1 Port 2

Cal Set 1


B

CalAdapter

Cal

Adapter

Cal Set 2


B

Port 2Adapter

BDUTPort 1



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TerminationAdapter DUT

Worst-case

System Directivity

28 dB

17 dB

14 dB

APC-7 to SMA (m)

SWR:1.06

APC-7 to N (f) + N (m) to SMA (m)

SWR:1.05 SWR:1.25

APC-7 to N (m) + N (f) to SMA (f) + SMA (

Documents

Vector Network Analyzer Basics