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REDBACK
¤UHF Band Diversity Wireless Microphone System
®
Opera
ting In
structio
ns
Manufactured exclusively for Altronic D
istributors Pty Ltd
REDBACK®
C 8890C
700 Ch U
HF Band D
iversity Wireless M
ic SystemRED
BACK® C
8890C 700 C
h UH
F Band Diversity W
ireless Mic System
Page 16
Distributed by Altronic D
istributors Pty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999Internet: w
ww.altronics.com
.au
70
0 C
HA
NN
EL U
HF B
AN
D
TR
UE
DIV
ER
SIT
Y W
IRE
LE
SS
MIC
RO
PH
ON
E S
YS
TE
M
Revision 14102014
Altronic Distributors w
arrants this product for 12 months from
date of purchase from Altronics or its resellers to the
consumer. If this item
is part of an installation or another product, please contact the installer or supplier for yourw
arranty.
During the w
arranty period, we undertake to repair or replace your product at no charge if found to be defective
due to a manufacturing fault. The w
arranty excludes damage by m
isuse or incorrect installation (i.e. failure toinstall and operate device according to specifications in the supplied instruction m
anual), neglect, shippingaccident, or no fault found, nor by use in a w
ay or manner not intended by the supplier.
For repair or service please contact your PLACE O
F PURC
HASE.
If this item w
as purchased directly from Altronics
please make a w
arranty claim by:
1.FO
R MAIL O
RDER C
USTO
MERS (includes school and trade orders),
a)Ringing us on 1300 797 007 and quoting your Tax invoice num
ber.b)
Upon contacting Altronics, w
e will issue an R.A. (Return Authorisation). As Altronics have a
number of service agents throughout Australia, a copy of the R.A. w
ill be emailed, faxed or m
ailedto you w
ith full instructions of how and w
here to send the goods. The freight for shipping goods back to Altronics for all repairs is at the custom
ers expense. c)
A copy of the R.A. form, (or at the very m
inimum
, the R.A. number) m
ust accompany the goods
to effect the repair.d)
Altronics will pay the return freight to the custom
er where the w
arranty claim has been accepted.
e)Please quote the R.A. num
ber in any correspondence to us.
2.FO
R OVER TH
E CO
UN
TER PURC
HASES; to m
ake a warranty claim
, please return the goods to us in any of our stores, w
ith a copy of your proof of purchase (tax invoice).a)
Upon leaving the goods at one of our stores, an R.A. (return authorisation) num
ber will be issued
to you.b)
Once repaired, you w
ill be contacted, advising that the goods are ready to be collected from the
store.
It is at Altronics discretion as to whether the goods w
ill be repaired or replaced (whilst under w
arranty); and as tow
hether identical goods will be used to replace the item
due to changes of models / products.
Note: U
nder no circumstances should you attem
pt to repair the device yourself or via a non-authorised Altronicsservice centre, as this w
ill invalidate the warranty!
Our goods com
e with guarantees that cannot be excluded under the Australian C
onsumer Law
. You are entitled toa replacem
ent or refund for a major failure and for com
pensation for any other reasonably foreseeable loss ordam
age. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable qualityand the failure does not am
ount to a major failure.
NO
T FIELD SER
VICEAB
LE.D
istributed by Altronic Distributors P
ty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999
Internet: ww
w.altronics.com
.au
Page 15
REDBACK®
C 8890C
700 Channel U
HF Band D
iversity Wireless M
ic SystemRED
BACK® C
8890C 700 C
h UH
F Band Diversity W
ireless Mic System
Congratulations on purchasing a RED
BAC
K PLL synthesized true diversity w
ireless microphone system
. The UH
F band wireless
microphone and receiver are the latest generation high quality audio system
s. The PLL synthesized diversity wireless
microphone system
operates on UH
F band frequency (520-550MH
z) with 700 selectable channels. Please read this instruction
manual com
pletely before operating the system. These instructions cover the transm
itters, and receiver model C
8890C. The
receiver unit is used with com
patible 700 channel handheld (C 8892C
) and lavalier (C 8893C
) transmitters.
System Features:
•O
perates on UH
F band frequency range 520-550MH
z with PLL synthesized control.
•Auto-scan function to easily find an interference free channel.
•Preset channel groups allow
up to 8 transmitters and receivers w
ith the use of the autoscan function, up to 12 transmitters
can be used in the same location.
•PLL (Phase Locked Loop) synthesized w
ireless microphone system
with 700 selectable frequencies
making it easy to choose non-interference channels.
•Excellent reception system
ensures super high sensitivity, and a high signal to noise ratio.•
Units are supplied w
ith SMT assem
bled PCB
modules ensuring high reliability and easy serviceability.
•H
igh dynamic range handheld m
icrophone for all vocal applications.
•Lapel m
icrophone that minim
ises static pickup resulting in very low noise.
Receiver Features:
•12V D
C Pow
er supply (supplied)•
1/2 19” size case with pow
er and RF indicators. Rack ears available for mounting one or tw
o systems into
19” rack equipment.
•Rem
ovable aerials making the unit suitable for portable or fixed installations. Aerials are fitted w
ith BN
C connectors.
•Includes in-built pow
er supply for antenna booster.
Receiver Specifications:
Carrier Frequency Range:
.................................................................................. ..U
HF band 520-550M
Hz
Frequency Stability: ........................................................................
±0.005% w
ith PLL synthesized controlledS/N
Ratio: ....................... ...............................................................................
Over 94dB
, at 60dB/μ
VIm
age and Spurious Rejection:......................................................................................
80 dB m
inimum
Receiving Sensitivity:................................. .............................................
10uV over 80dB/uV antenna input
Selectivity: ..........................................................................................................................>50dB
Dynam
ic Range:..................................................................................................................
>100dBM
odulation Mode:
................ ......................................................................................................FMIF Frequency:
........................................................................................1st : 243.95M
Hz 2nd: 10.7M
Hz
Service Area:........ ..........................................................................................
100m in ideal conditions
AF Response:......... ...........................................................................................
80Hz to 16kH
z(±3dB
)T.H
.D.:
................................................................................................................................................Less than 1% (at 1kHz)
Receiver Audio Output:
..... ...............................................U
nbalanced: max. 775m
V (0dB=0.775V) at 5KΩ
LoadB
alanced: max. 1V (0dB
=1V) at 5KΩ Load
Receiver Power Supply:
............................................... ...................................................D
C 12 Adapter
Transmitter Specifications (transm
itters sold separately):C
arrier Frequency Range: ............................................... .....................................
UH
F band 520-550MH
zR
F Power O
utput: ..........................................................................................................
10mW
(max.)
Spurious Emission:
........................................................................M
ore than 60dB below
carrier frequencyFrequency Stability:
................................................................W
ithin ±0.005% w
ith PLL synthesised controlledM
aximum
Deviation:
................ ..............................................................±
48kHz w
ithin limiting com
pressorM
icrophone Capsule: ..........................................................................
Uni-directional condenser m
icrophoneO
perating Voltage:..............................................................................
DC
1.5Vx2 AA (UM
-3) or rechargeableC
urrent Consum
ption:..................................................................................
Approx 120mA ±
10mA(m
ax.)
Page 2
1917
2016
16
710
24
13
89
314
5
1112
15
1618
21
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 14
1. P
ow
er:To sw
itch on, press and hold power sw
itch until display can be seen.2.
Bu
tton
:U
sed to select mode, and search channel forw
ards.3.
SY
NC
: Press this button w
hen synchronising the receiver and transmitter frequency. S
ee SY
NC
Mode (P
age 7)for operation description.
4. S
et Bu
tton
:S
ee ‘Channel S
election Modes’ (P
ages 4-6) section for more inform
ation on this button’s operation.5.
LC
D:
Displays the channel num
ber, frequency level, RF
& A
F signal strength, and m
ode.6.
GP
:Indicates the preset group num
ber, eg. P1, P
2 etc.7.
CH
:Indicates the preset channel num
ber eg. C1 C
2 etc.8.
CH
:Indicates the channel num
ber, from 001 to 700.
9 F
RE
Q: Indicates the frequency.
10. RF
Level In
dicato
rs:5-segm
ent meter illum
inates to indicate RF
signal strength. If no LED
s illuminate then the
unit is not receiving a signal.11. A
F L
evel Ind
icators:
5-segment m
eter illuminates to indicate audio signal strength. If no LE
Ds illum
inate then theunit is not receiving an audio signal.
12. MA
NU
AL
:T
his mode allow
s you to select your own interference free channels.
13. SC
AN
:T
his mode scans for an interference free channel and selects one autom
atically.14. P
RE
SE
T: This m
ode selects an interference-free channel from preset-groups. T
here are 4 preset groups. In eachgroup there are 8 preset channels (see Table 1). T
his allows up to 8 system
s to be used simultaneously.
15. Volu
me C
on
trol:
Use this rotary control to adjust the receiver output level to m
atch the input sensitivity of an audiom
ixer or an amplifier.
16. An
tenn
a Inp
ut C
on
necto
r:B
NC
-type connectors provide connection to the supplied antennas or to coaxial cableused w
ith an antenna divider, antenna boosters or remote antennas.
17. Balan
ced O
utp
ut:
3-pin XLR
connector provides balanced low-im
pedance output.18. U
nb
alanced
Ou
tpu
t:U
nbalanced 6.3mm
mono jack audio output for connecting to a line point.
19. Mic/L
ine S
witch
: Use this to adjust output (X
LR balanced connector and 6.35m
m unbalanced phone jack) for
microphone (-20dB
) or line-level (0dB).
20. Sq
uelch
:U
se the squelch to adjust the output level to suppress noise. The higher the squelch control, the low
erthe sensitivity of the receiver and sm
aller the service area of the system. S
et the squelch to minim
um before
turning the receiver on. If you have unwanted noise increase the squelch control until the noise disappears.
21. DC
IN: D
C Input connector for the included 12V
DC
power supply.
Page 3
Figure 1: Front and Rear Panel view
s
REDBACK®
C 8890C
700 Channel U
HF Band D
iversity Wireless M
ic System
CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ.351 535.025 386 536.175 421 537.350 456 538.525 491 539.675 526 541.275 561 543.025 596 544.775 631 546.525 666 548.275352 535.050 387 536.225 422 537.375 457 538.550 492 539.725 527 541.325 562 543.075 597 544.825 632 546.575 667 548.325353 535.075 388 536.250 423 537.425 458 538.575 493 539.750 528 541.375 563 543.125 598 544.875 633 546.625 668 548.375354 535.125 389 536.275 424 537.450 459 538.625 494 539.775 529 541.425 564 543.175 599 544.925 634 546.675 669 548.425355 535.150 390 536.325 425 537.475 460 538.650 495 539.825 530 541.475 565 543.225 600 544.975 635 546.725 670 548.475356 535.175 391 536.350 426 537.525 461 538.675 496 539.850 531 541.525 566 543.275 601 545.025 636 546.775 671 548.525357 535.225 392 536.375 427 537.550 462 538.725 497 539.875 532 541.575 567 543.325 602 545.075 637 546.825 672 548.575358 535.250 393 536.425 428 537.575 463 538.750 498 539.925 533 541.625 568 543.375 603 545.125 638 546.875 673 548.625359 535.275 394 536.450 429 537.625 464 538.775 499 539.950 534 541.675 569 543.425 604 545.175 639 546.925 674 548.675360 535.325 395 536.475 430 537.650 465 538.825 500 539.975 535 541.725 570 543.475 605 545.225 640 546.975 675 548.725361 535.350 396 536.525 431 537.675 466 538.850 501 540.025 536 541.775 571 543.525 606 545.275 641 547.025 676 548.775362 535.375 397 536.550 432 537.725 467 538.875 502 540.075 537 541.825 572 543.575 607 545.325 642 547.075 677 548.825363 535.425 398 536.575 433 537.750 468 538.925 503 540.125 538 541.875 573 543.625 608 545.375 643 547.125 678 548.875364 535.450 399 536.625 434 537.775 469 538.950 504 540.175 539 541.925 574 543.675 609 545.425 644 547.175 679 548.925365 535.475 400 536.650 435 537.825 470 538.975 505 540.225 540 541.975 575 543.725 610 545.475 645 547.225 680 548.975366 535.525 401 536.675 436 537.850 471 539.025 506 540.275 541 542.025 576 543.775 611 545.525 646 547.275 681 549.025367 535.550 402 536.725 437 537.875 472 539.050 507 540.325 542 542.075 577 543.825 612 545.575 647 547.325 682 549.075368 535.575 403 536.750 438 537.925 473 539.075 508 540.375 543 542.125 578 543.875 613 545.625 648 547.375 683 549.125369 535.625 404 536.775 439 537.950 474 539.125 509 540.425 544 542.175 579 543.925 614 545.675 649 547.425 684 549.175370 535.650 405 536.825 440 537.975 475 539.150 510 540.475 545 542.225 580 543.975 615 545.725 650 547.475 685 549.225371 535.675 406 536.850 441 538.025 476 539.175 511 540.525 546 542.275 581 544.025 616 545.775 651 547.525 686 549.275372 535.725 407 536.875 442 538.050 477 539.225 512 540.575 547 542.325 582 544.075 617 545.825 652 547.575 687 549.325373 535.750 408 536.925 443 538.075 478 539.250 513 540.625 548 542.375 583 544.125 618 545.875 653 547.625 688 549.375374 535.775 409 536.950 444 538.125 479 539.275 514 540.675 549 542.425 584 544.175 619 545.925 654 547.675 689 549.425375 535.825 410 536.975 445 538.150 480 539.325 515 540.725 550 542.475 585 544.225 620 545.975 655 547.725 690 549.475376 535.850 411 537.025 446 538.175 481 539.350 516 540.775 551 542.525 586 544.275 621 546.025 656 547.775 691 549.525377 535.875 412 537.050 447 538.225 482 539.375 517 540.825 552 542.575 587 544.325 622 546.075 657 547.825 692 549.575378 535.925 413 537.075 448 538.250 483 539.425 518 540.875 553 542.625 588 544.375 623 546.125 658 547.875 693 549.625379 535.950 414 537.125 449 538.275 484 539.450 519 540.925 554 542.675 589 544.425 624 546.175 659 547.925 694 549.675380 535.975 415 537.150 450 538.325 485 539.475 520 540.975 555 542.725 590 544.475 625 546.225 660 547.975 695 549.725381 536.025 416 537.175 451 538.350 486 539.525 521 541.025 556 542.775 591 544.525 626 546.275 661 548.025 696 549.775382 536.050 417 537.225 452 538.375 487 539.550 522 541.075 557 542.825 592 544.575 627 546.325 662 548.075 697 549.825383 536.075 418 537.250 453 538.425 488 539.575 523 541.125 558 542.875 593 544.625 628 546.375 663 548.125 698 549.875384 536.125 419 537.275 454 538.450 489 539.625 524 541.175 559 542.925 594 544.675 629 546.425 664 548.175 699 549.925385 536.150 420 537.325 455 538.475 490 539.650 525 541.225 560 542.975 595 544.725 630 546.475 665 548.225 700 549.950
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 4Page13
Connection:
1.C
onnect the cable, one end to the balanced or unbalanced output jack of the receiver, the other end to the mic m
ixing input of am
plifier, audio mixer etc.
2.For best results set the output volum
e control at about three quarter level and adjust mixer / am
plifier level to suit.3.
The squelch level is adjustable by the rotary pot at the back of the unit. Adjust the squelch level to prevent external noise. N
ote: setting the squelch high (towards m
ax) will reduce the range of the system
.
4.W
hen the receiver is not in use disconnect from the m
ains power.
CH
ANN
EL SELECTIO
N M
OD
ES: The receiver operates in three channel selection m
odes.
Manual C
hannel Selection:This m
ode allows you to m
anually select interference free channels. Table 1 shows the frequencies available. If tw
otransm
itters are being used in the same area, ensure the selected frequencies are at least 10 channel spaces apart.
This reduces interference.
Use the
button to select the MAN
UAL m
ode sothat the ‘M
ANU
AL’ marker appears on the LC
Ddisplay.
Press the SET button for two seconds until the
‘MU
TE’ marker appears on the receiver’s LC
Ddisplay, and w
hen the frequency and channel datastart flashing, then release the button.
Use the
button to select the frequency. Hold the
up arrow button to fast forw
ard through all availablefrequencies until a suitable frequency is found.
Press the SET button to lock the setting or let theselected channel and frequency values keepflashing five tim
es, until they lock into that setting.
CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ. CH FREQ.1 520.050 36 521.775 71 523.525 106 525.275 141 527.025 176 528.775 211 530.350 246 531.525 281 532.675 316 533.8502 520.075 37 521.825 72 523.575 107 525.325 142 527.075 177 528.825 212 530.375 247 531.550 282 532.725 317 533.8753 520.125 38 521.875 73 523.625 108 525.375 143 527.125 178 528.875 213 530.425 248 531.575 283 532.750 318 533.9254 520.175 39 521.925 74 523.675 109 525.425 144 527.175 179 528.925 214 530.450 249 531.625 284 532.775 319 533.9505 520.225 40 521.975 75 523.725 110 525.475 145 527.225 180 528.975 215 530.475 250 531.650 285 532.825 320 533.9756 520.275 41 522.025 76 523.775 111 525.525 146 527.275 181 529.025 216 530.525 251 531.675 286 532.850 321 534.0257 520.325 42 522.075 77 523.825 112 525.575 147 527.325 182 529.075 217 530.550 252 531.725 287 532.875 322 534.0508 520.375 43 522.125 78 523.875 113 525.625 148 527.375 183 529.125 218 530.575 253 531.750 288 532.925 323 534.0759 520.425 44 522.175 79 523.925 114 525.675 149 527.425 184 529.175 219 530.625 254 531.775 289 532.950 324 534.12510 520.475 45 522.225 80 523.975 115 525.725 150 527.475 185 529.225 220 530.650 255 531.825 290 532.975 325 534.15011 520.525 46 522.275 81 524.025 116 525.775 151 527.525 186 529.275 221 530.675 256 531.850 291 533.025 326 534.17512 520.575 47 522.325 82 524.075 117 525.825 152 527.575 187 529.325 222 530.725 257 531.875 292 533.050 327 534.22513 520.625 48 522.375 83 524.125 118 525.875 153 527.625 188 529.375 223 530.750 258 531.925 293 533.075 328 534.25014 520.675 49 522.425 84 524.175 119 525.925 154 527.675 189 529.425 224 530.775 259 531.950 294 533.125 329 534.27515 520.725 50 522.475 85 524.225 120 525.975 155 527.725 190 529.475 225 530.825 260 531.975 295 533.150 330 534.32516 520.775 51 522.525 86 524.275 121 526.025 156 527.775 191 529.525 226 530.850 261 532.025 296 533.175 331 534.35017 520.825 52 522.575 87 524.325 122 526.075 157 527.825 192 529.575 227 530.875 262 532.050 297 533.225 332 534.37518 520.875 53 522.625 88 524.375 123 526.125 158 527.875 193 529.625 228 530.925 263 532.075 298 533.250 333 534.42519 520.925 54 522.675 89 524.425 124 526.175 159 527.925 194 529.675 229 530.950 264 532.125 299 533.275 334 534.45020 520.975 55 522.725 90 524.475 125 526.225 160 527.975 195 529.725 230 530.975 265 532.150 300 533.325 335 534.47521 521.025 56 522.775 91 524.525 126 526.275 161 528.025 196 529.775 231 531.025 266 532.175 301 533.350 336 534.52522 521.075 57 522.825 92 524.575 127 526.325 162 528.075 197 529.825 232 531.050 267 532.225 302 533.375 337 534.55023 521.125 58 522.875 93 524.625 128 526.375 163 528.125 198 529.875 233 531.075 268 532.250 303 533.425 338 534.57524 521.175 59 522.925 94 524.675 129 526.425 164 528.175 199 529.925 234 531.125 269 532.275 304 533.450 339 534.62525 521.225 60 522.975 95 524.725 130 526.475 165 528.225 200 529.975 235 531.150 270 532.325 305 533.475 340 534.65026 521.275 61 523.025 96 524.775 131 526.525 166 528.275 201 530.025 236 531.175 271 532.350 306 533.525 341 534.67527 521.325 62 523.075 97 524.825 132 526.575 167 528.325 202 530.050 237 531.225 272 532.375 307 533.550 342 534.72528 521.375 63 523.125 98 524.875 133 526.625 168 528.375 203 530.075 238 531.250 273 532.425 308 533.575 343 534.75029 521.425 64 523.175 99 524.925 134 526.675 169 528.425 204 530.125 239 531.275 274 532.450 309 533.625 344 534.77530 521.475 65 523.225 100 524.975 135 526.725 170 528.475 205 530.150 240 531.325 275 532.475 310 533.650 345 534.82531 521.525 66 523.275 101 525.025 136 526.775 171 528.525 206 530.175 241 531.350 276 532.525 311 533.675 346 534.85032 521.575 67 523.325 102 525.075 137 526.825 172 528.575 207 530.225 242 531.375 277 532.550 312 533.725 347 534.87533 521.625 68 523.375 103 525.125 138 526.875 173 528.625 208 530.250 243 531.425 278 532.575 313 533.750 348 534.92534 521.675 69 523.425 104 525.175 139 526.925 174 528.675 209 530.275 244 531.450 279 532.625 314 533.775 349 534.95035 521.725 70 523.475 105 525.225 140 526.975 175 528.725 210 530.325 245 531.475 280 532.650 315 533.825 350 534.975
520-550MHz
Continued nextpage
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 12
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic SystemPage 5
Scan Channel Selection:
This mode autom
atically searches for an interference free channel.N
ote: Have the transm
itter 1m from
the receiver when using this function.
Use the
button to select the SCAN
mode so that
the ‘SCAN
’ marker appears on the LC
D display.
Press the SET button for two seconds until the
‘MU
TE’ marker appears on the receiver’s LC
Ddisplay, and w
hen the frequency and channel datastart flashing, then release the button.
Use the
button to allow the unit to scan for a
vacant or unused frequency. Press the up arrowbutton to initiate each frequency channel search– no need to hold button.
Press the SET button to lock the setting or let theselected channel and frequency values keepflashing five tim
es, until they lock into that setting.
For long distance requirements or special or difficult applications such as stadium
s, auditoriums, shopping centres, a range of
accessories are available to increase transmission distance or to reduce drop outs.
These include:C
8841AC
eiling mount antenna
C8842A
Vertical mount antenna booster
C8843A
Mounting bracket to suit C
8842A antenna booster
In addition to the above, for multiple system
installations a range of accessories are available to aid cabling and installation.
These include:C
8844AAntenna splitter / com
binerC
8846AAntenna divider
For further information on these and technical help please contact your nearest Redback dealer or consult the product m
anualsfor the above.
The detachable antenna ishighly recom
mended for
long-distance purposes, suchas in a stadium
or in anauditorium
.
Antenna Booster
UH
F Antenna
AntennaM
ountingB
racket
The antenna booster isdesigned for long distancereceiving applications, eg. if the distance exceeds30M
.
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 11Page 6
Use the
button to select the PRESET mode so that
the ‘PRESET marker appears on the LC
D display.
Press the SET button for two seconds until the ‘M
UTE’ m
arkerappears on the receiver’s LC
D display, and w
hen thefrequency and channel data start flashing, then release thebutton.There are four preset groups each w
ith eight preset channels.
Press the button to select a preset group.
Preset C
hannel Selection:This m
ode is used when m
ultiple C 8890C
systems are used in the sam
e area. Each receiver is setup to use PRESET mode. This
allows each receiver to select a channel in one of four preset groups. W
ithin each preset group is eight selectable channels. SeeTable 1 for a list of frequencies w
ithin each preset group. Once configured, up to eight transm
itters and receivers may be used in
the same location w
ithout interference. If more than eight frequencies are required, once a group of eight is selected, go to
autoscan mode and continue to set frequencies nine through tw
elve.
If interference occurs within the selected preset group, try sw
itching to the next preset group. If all groups exhibit interference,use m
anual or auto scan mode to find a suitable channel.
Press the SET button to lock the setting or let theselected channel and frequency values keepflashing five tim
es, until they lock into that setting.
Press and hold the button to scroll through the
channel numbers in order to select a preset
frequency channel..
Press the SET button again to change to thechannel selection zone w
ithin the chosen presetgroup.
Note: TW
O O
R M
OR
E WIR
ELESS MIC
RO
PH
ON
ES WH
ICH
TRAN
SMIT AT TH
E SAME FR
EQU
ENC
Y CAN
NO
T BE
USED
IN TH
E SAME LO
CATIO
N.
WH
EN TW
O O
R M
OR
E WIR
ELESS MIC
RO
PH
ON
ES (HAN
DH
ELD AN
D/O
R LAVALIER
) ARE U
SED IN
THE SAM
ELO
CATIO
N EN
SUR
E THAT 10 O
R M
OR
E CH
ANN
EL SPACES AR
E BETW
EEN EAC
H SELEC
TED FR
EQU
ENC
Y SOTH
AT INTER
FEREN
CE D
OES N
OT O
CC
UR
.
If interference still occurs (which is due to harm
onics) select another frequency. TABLE 1 show
s 4 groups of 8frequencies w
hich may be used together in the sam
e area. ALTERN
ATIVELY USE TH
E SCAN
FUN
CTIO
N.
TRO
UB
LESHO
OTIN
G:
Signal dropouts and noise may be suddenly encountered by interruption from
outside if there is too long a distance between
microphone and receiver, or battery pow
er is low. In such a case, adjust receiver antenna or change battery.
No Sound O
utput•
Check the transm
itter and receiver power supply and sw
itch. •
Check that the transm
itter and receiver are tuned to the same frequency.
•C
heck that the audio amplifier or m
ixer is switched on and that the receiver
output is connected.•
Check w
hether transmitter is too far aw
ay from receiver or SQ
UELC
H control
set too high. •
Check w
hether transmitter or receiver is located too close to a m
etal object or there are
obstructions between transm
itter and receiver.
Sound Interference•
When using tw
o or more m
icrophone sets simultaneously, ensure that the chosen
frequencies do not interfere (see Table 1 for frequency guide). •
Check for interference from
other devices - wireless m
icrophones, TV, radio etc.
•Im
prove antenna location.
Distortion
•C
heck the receiver volume level is not set too high.
•C
heck for interference from other devices - w
ireless microphones, TV, radio etc.
PR
ECAU
TION
S:* Avoid extrem
ely dirty or dusty environments.
* Avoid use in areas where extrem
ely high humidity is present.
* Do not drop the m
icrophone on a hard concrete floor, nor strike the microphone head front w
ith fist or fingers, nor blow
strongly into the microphone head front.
* Rem
ove the battery in microphone if not in use for a long tim
e. This will prevent dam
age that a defective"leaking" battery m
ay cause.
DESIG
N AN
D SP
ECIFIC
ATION
S SUB
JECT TO
CH
ANG
E WITH
OU
T NO
TICE.
TABLE 1: 520-550M
Hz
CH
GR
OU
P 1
CH
GR
OU
P 2
CH
GR
OU
P 3
CH
GR
OU
P 4
CH
12
520.07518
520.87532
521.57565
523.225
CH
247
522.325113
525.62595
524.725182
529.075
CH
3162
528.075133
526.625308
533.575323
534.075
CH
4245
531.475204
530.125350
534.975447
538.225
CH
5399
536.625264
532.125378
535.925504
540.175
CH
6554
542.675488
539.575426
537.525529
541.425
CH
7608
545.375647
547.325542
542.075572
543.575
CH
8631
546.525661
548.025679
548.925698
549.875
3 Pin XLR
Lead
AMP
LIFIER
SPEAK
ER
Mic IN
Line IN
AUD
IO M
IXERW
IRELESS
REC
EIVER
Line OU
T
Fig 4. Wireless R
eceiver Connection Via M
ic In
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 10Page 7
SYNC
Mode:
Select the SYNC
mode to quick m
atch the interference-free channel on the receiver with H
andheld Mic/B
odypack.First use one of the other m
odes to select an interference-free channel.W
hen using SYNC
function, the distance from the receiver and transm
itter should be within one m
etre.
1M
SYNC
Press and hold the SYNC
button on the Handheld
Mic/B
odypack. The ‘SYNC
’ marker w
ill startflashing on the receiver LC
D display.
Keep pressing the SYNC
button on the Handheld
Mic/B
odypack. Then press the SYNC
button on thereceiver at the sam
e time.
When the ‘SYN
C’ m
arker disappears from the LC
Ddisplay and the RF signal show
s up, it will lock the
setting and mem
orize the channel. Now
theReceiver and the handheld units are paired.
AMP
LIFIER
SPEAK
ER
Mic IN
Line IN
AUD
IO M
IXERW
IRELESS
REC
EIVER
Line OU
T
6.3
5m
m S
tereo jack Lead
Fig 5. Wireless R
eceiver Connection Via Line In
Figure 6: The unit may be 19” rack m
ounted individually, shown in (A). O
r side by sidew
ith an additional receiver, shown in (B
).
A.
B.
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
RED
BAC
K®
C 8890C
700 Channel U
HF B
and Diversity W
ireless Mic System
Page 8Page 9
Handheld Transm
itter Features:•
High sensitivity unidirectional dynam
ic capsule reduces unwanted handling noise to a m
inimum
•Special noise absorption design w
hich eliminates sw
itch shock and handling noise.•
PLL synthesised control.•
Accepts two AA batteries (not supplied).
•Low
battery LED indicator.
1. Grille: P
rotects the microphone capsule and helps
reduce breath sounds and wind noise.
2. LC
D:
Displays channel num
ber & battery level.
3. Po
wer O
N/O
FF
Sw
itch4. B
attery Co
mp
artmen
t5. S
YN
C b
utto
n:
For frequency pairing w
ith receiver.
6. Battery C
over
7. Co
lou
r Clip
:T
his colour clip helps to identify thefrequency for m
ulti-channel systems operation.
8. An
ti Ro
ll Rin
g: P
revents microphone from
rollingw
hen placed on furniture.
Operation: (See Fig 2.)
1.U
nscrew to open the battery com
partment.
2.Insert tw
o AA Size 1.5V batteries into the battery holder according to polarity (+) and (-) indicators marked on the battery
housing. The transmitter accepts dry cell batteries or rechargeable batteries.
3.Replace battery cover.
4.Push and hold the pow
er switch until the LC
D illum
inates to switch on. The LC
D show
s channel number and battery status.
5.To change channel/frequency, press the SYN
C button and synchronise the receiver and transm
itter frequency. See SYNC
M
ode for operation description.6.
To switch off, press and hold the pow
er button until the LCD
displays ‘OFF’.
7.Rem
ove the batteries from the unit if it is not to be used for a long tim
e. This will prevent dam
age to the unit that a defective leaking battery m
ay cause.
PL
EA
SE
NO
TE
: AL
L TR
AN
SM
ITT
ER
S A
RE
SO
LD
SE
PAR
AT
ELY
12
56
473 8
Figure 2: Handheld M
icrophone Transmitter C
8892C
3
1
10
4
27611
598
Beltpack M
icrophone:A range of m
icrophones and pickups are available for the belt pack transmitter including tie clip m
ic, lecture type headset,aerobics type headset and guitar. The belt pack m
icrophone is equipped with a line/m
ic switch.
1.P
ow
er ON
/OF
F S
witch
2.M
ini X
LR
Co
nn
ector:
For m
icrophone or guitar pick-up.3.
An
tenn
a:P
ermanently connected, helical antenna.
4.L
CD
:D
isplays channel number and battery pow
er level.5.
SY
NC
: For frequency pairing w
ith the receiver.6.
Mic/L
ine S
elector:
This sw
itch sets the audio input either to microphone level or line level.
7.G
ain:
This rotary control adjusts the input audio level of the transm
itter. The gain adjustm
ent range is 10dB.
8.M
ic Un
it: Pictured w
ith the C 8893C
lapel. 9.
Tie Clip
:To clip on the tie or lapel for free-m
ovement.
10.C
able:
With m
ini XLR
connector cable to connect the transmitter.
11.B
attery Co
mp
artmen
t
Figure 3: Beltpack M
icrophone Transmitter C
8893C
Operation: (See Fig 3.)
1.Slide open the battery com
partment.
2. Insert tw
o AA Size 1.5V batteries into the battery holder according to polarity (+) and (-) indicators marked on the battery
housing. The transmitter accepts dry cell batteries or rechargeable batteries.
3. Replace battery cover.
4.C
onnect the microphone or guitar pick-up to the unit.
5.For m
icrophone set the mic/line sw
itch to mic. For guitar input set to line.
6. To sw
itch on, push the power sw
itch until the LCD
illuminates. The LC
D show
s channel number and battery status.
7.To change channel/frequency, Press the SYN
C button and synchronise the receiver and transm
itter frequency. See SYNC
M
ode for operation description.8.
Adjust gain to optimum
level. If the unit overdrives reduce gain. 9.
To switch off, press and hold the pow
er button until the LCD
displays ‘OFF’.
10.Remove the batteries from
the unit if it is not to be used for a long time. This w
ill prevent damage to the unit that a defective
leaking battery may cause.
