REDBACK C 8890C 700 Ch UHF Band Diversity Wireless Microphone System, C 8892C Handheld Microphone Transmitter, C 8893C Beltpack Microphone Transmitter Operating Instructions

REDBACK® C 8890C 700 Ch UHF Band Diversity Wireless Mic System
Altronic Distributors warrants 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 your
warranty.
During the warranty period, we undertake to repair or replace your product at no charge if found to be defective
due to a manufacturing fault. The warranty excludes damage by misuse or incorrect installation (i.e. failure to
install and operate device according to specifications in the supplied instruction manual), neglect, shipping
accident, or no fault found, nor by use in a way or manner not intended by the supplier.
For repair or service please contact your PLACE OF PURCHASE.
If this item was purchased directly from Altronics please make a warranty claim by:
1. FOR MAIL ORDER CUSTOMERS (includes school and trade orders),
a) Ringing us on 1300 797 007 and quoting your Tax invoice number.
b) Upon contacting Altronics, we will issue an R.A. (Return Authorisation). As Altronics have a
number of service agents throughout Australia, a copy of the R.A. will be emailed, faxed or mailed
to you with full instructions of how and where to send the goods. The freight for shipping goods
back to Altronics for all repairs is at the customers expense.
c) A copy of the R.A. form, (or at the very minimum, the R.A. number) must accompany the goods
to effect the repair.
d) Altronics will pay the return freight to the customer where the warranty claim has been accepted.
e) Please quote the R.A. number in any correspondence to us.
2. FOR OVER THE COUNTER PURCHASES; to make a warranty claim, please return the goods to us in
any of our stores, with a copy of your proof of purchase (tax invoice).
a) Upon leaving the goods at one of our stores, an R.A. (return authorisation) number will be issued
to you.
b) Once repaired, you will be contacted, advising that the goods are ready to be collected from the
store.
It is at Altronics discretion as to whether the goods will be repaired or replaced (whilst under warranty); and as to
whether identical goods will be used to replace the item due to changes of models / products.
Note: Under no circumstances should you attempt to repair the device yourself or via a non-authorised Altronics
service centre, as this will invalidate the warranty!
Revision 14102014
NOT FIELD SERVICEABLE.
Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999
Internet: www.altronics.com.au
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to
a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or
damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality
and the failure does not amount to a major failure.
Page 16
C 8890C
700 Ch UHF
Band Diversity
Wireless Mic System
REDBACK ¤REDBACK®
UHF Band
Diversity
Wireless
Microphone
System
®
700 CHANNEL UHF BAND
TRUE DIVERSITY WIRELESS
MICROPHONE SYSTEM
Operating Instructions
Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999
Internet: www.altronics.com.au
Manufactured exclusively for Altronic Distributors Pty Ltd
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Congratulations on purchasing a REDBACK PLL synthesized true diversity wireless microphone system. The UHF band wireless
microphone and receiver are the latest generation high quality audio systems. The PLL synthesized diversity wireless
microphone system operates on UHF band frequency (520-550MHz) with 700 selectable channels. Please read this instruction
manual completely before operating the system. These instructions cover the transmitters, and receiver model C 8890C. The
receiver unit is used with compatible 700 channel handheld (C 8892C) and lavalier (C 8893C) transmitters.
System Features:
• Operates on UHF band frequency range 520-550MHz with PLL synthesized control.
• Auto-scan function to easily find an interference free channel.
• Preset channel groups allow up to 8 transmitters and receivers with the use of the autoscan function, up to 12 transmitters
can be used in the same location.
• PLL (Phase Locked Loop) synthesized wireless 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 with SMT assembled PCB modules ensuring high reliability and easy serviceability.
High dynamic range handheld microphone for all vocal applications.
Lapel microphone that minimises static pickup resulting in very low noise.
•
•
•
•
Receiver Features:
• 12V DC Power supply (supplied)
• 1/2 19” size case with power and RF indicators. Rack ears available for mounting one or two systems into
19” rack equipment.
• Removable aerials making the unit suitable for portable or fixed installations. Aerials are fitted with BNC connectors.
• Includes in-built power supply for antenna booster.
Receiver Specifications:
Carrier Frequency Range: ....................................................................................UHF band 520-550MHz
Frequency Stability: ........................................................................±0.005% with PLL synthesized controlled
S/N Ratio: ......................................................................................................Over 94dB, at 60dB/μV
Image and Spurious Rejection: ......................................................................................80 dB minimum
Receiving Sensitivity: ..............................................................................10uV over 80dB/uV antenna input
Selectivity: ..........................................................................................................................>50dB
Dynamic Range: ..................................................................................................................>100dB
Modulation Mode: ......................................................................................................................FM
IF Frequency: ........................................................................................1st : 243.95MHz 2nd: 10.7MHz
Service Area: ..................................................................................................100m in ideal conditions
AF Response: ....................................................................................................80Hz to 16kHz(±3dB)
T.H.D.: ................................................................................................................................................Less than 1% (at 1kHz)
Receiver Audio Output: ....................................................Unbalanced: max. 775mV (0dB=0.775V) at 5KΩ Load
Balanced: max. 1V (0dB=1V) at 5KΩ Load
Receiver Power Supply: ..................................................................................................DC 12 Adapter
Transmitter Specifications (transmitters sold separately):
Carrier Frequency Range: ....................................................................................UHF band 520-550MHz
RF Power Output: ..........................................................................................................10mW (max.)
Spurious Emission: ........................................................................More than 60dB below carrier frequency
Frequency Stability: ................................................................Within ±0.005% with PLL synthesised controlled
Maximum Deviation: ..............................................................................±48kHz within limiting compressor
Microphone Capsule: ..........................................................................Uni-directional condenser microphone
Operating Voltage: ..............................................................................DC1.5Vx2 AA (UM-3) or rechargeable
Current Consumption: ..................................................................................Approx 120mA ± 10mA(max.)
Page 2
REDBACK® C 8890C 700 Ch UHF Band Diversity Wireless Mic System
Page 15
FREQ.
535.025
535.050
535.075
535.125
535.150
535.175
535.225
535.250
535.275
535.325
535.350
535.375
535.425
535.450
535.475
535.525
535.550
535.575
535.625
535.650
535.675
535.725
535.750
535.775
535.825
535.850
535.875
535.925
535.950
535.975
536.025
536.050
536.075
536.125
536.150
CH
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
FREQ.
536.175
536.225
536.250
536.275
536.325
536.350
536.375
536.425
536.450
536.475
536.525
536.550
536.575
536.625
536.650
536.675
536.725
536.750
536.775
536.825
536.850
536.875
536.925
536.950
536.975
537.025
537.050
537.075
537.125
537.150
537.175
537.225
537.250
537.275
537.325
CH
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
FREQ.
537.350
537.375
537.425
537.450
537.475
537.525
537.550
537.575
537.625
537.650
537.675
537.725
537.750
537.775
537.825
537.850
537.875
537.925
537.950
537.975
538.025
538.050
538.075
538.125
538.150
538.175
538.225
538.250
538.275
538.325
538.350
538.375
538.425
538.450
538.475
CH
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
FREQ.
538.525
538.550
538.575
538.625
538.650
538.675
538.725
538.750
538.775
538.825
538.850
538.875
538.925
538.950
538.975
539.025
539.050
539.075
539.125
539.150
539.175
539.225
539.250
539.275
539.325
539.350
539.375
539.425
539.450
539.475
539.525
539.550
539.575
539.625
539.650
CH
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
FREQ.
539.675
539.725
539.750
539.775
539.825
539.850
539.875
539.925
539.950
539.975
540.025
540.075
540.125
540.175
540.225
540.275
540.325
540.375
540.425
540.475
540.525
540.575
540.625
540.675
540.725
540.775
540.825
540.875
540.925
540.975
541.025
541.075
541.125
541.175
541.225
CH
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
FREQ.
541.275
541.325
541.375
541.425
541.475
541.525
541.575
541.625
541.675
541.725
541.775
541.825
541.875
541.925
541.975
542.025
542.075
542.125
542.175
542.225
542.275
542.325
542.375
542.425
542.475
542.525
542.575
542.625
542.675
542.725
542.775
542.825
542.875
542.925
542.975
CH
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
FREQ.
543.025
543.075
543.125
543.175
543.225
543.275
543.325
543.375
543.425
543.475
543.525
543.575
543.625
543.675
543.725
543.775
543.825
543.875
543.925
543.975
544.025
544.075
544.125
544.175
544.225
544.275
544.325
544.375
544.425
544.475
544.525
544.575
544.625
544.675
544.725
CH
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
FREQ.
544.775
544.825
544.875
544.925
544.975
545.025
545.075
545.125
545.175
545.225
545.275
545.325
545.375
545.425
545.475
545.525
545.575
545.625
545.675
545.725
545.775
545.825
545.875
545.925
545.975
546.025
546.075
546.125
546.175
546.225
546.275
546.325
546.375
546.425
546.475
CH
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
FREQ.
546.525
546.575
546.625
546.675
546.725
546.775
546.825
546.875
546.925
546.975
547.025
547.075
547.125
547.175
547.225
547.275
547.325
547.375
547.425
547.475
547.525
547.575
547.625
547.675
547.725
547.775
547.825
547.875
547.925
547.975
548.025
548.075
548.125
548.175
548.225
CH
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Page 14
CH
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
FREQ.
548.275
548.325
548.375
548.425
548.475
548.525
548.575
548.625
548.675
548.725
548.775
548.825
548.875
548.925
548.975
549.025
549.075
549.125
549.175
549.225
549.275
549.325
549.375
549.425
549.475
549.525
549.575
549.625
549.675
549.725
549.775
549.825
549.875
549.925
549.950
6
3
20
21
7 10 11 2 4
19
15
16
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
13 12
18
8 9
17
14 5
Figure 1: Front and Rear Panel views
1
16
1. Power: To switch on, press and hold power switch until display can be seen.
2.
Button: Used to select mode, and search channel forwards.
3. SYNC: Press this button when synchronising the receiver and transmitter frequency. See SYNC Mode (Page 7)
for operation description.
4. Set Button: See ‘Channel Selection Modes’ (Pages 4-6) section for more information on this button’s operation.
5. LCD: Displays the channel number, frequency level, RF & AF signal strength, and mode.
6. GP: Indicates the preset group number, eg. P1, P2 etc.
7. CH: Indicates the preset channel number eg. C1 C2 etc.
8. CH: Indicates the channel number, from 001 to 700.
9 FREQ: Indicates the frequency.
10. RF Level Indicators: 5-segment meter illuminates to indicate RF signal strength. If no LEDs illuminate then the
unit is not receiving a signal.
11. AF Level Indicators: 5-segment meter illuminates to indicate audio signal strength. If no LEDs illuminate then the
unit is not receiving an audio signal.
12. MANUAL: This mode allows you to select your own interference free channels.
13. SCAN: This mode scans for an interference free channel and selects one automatically.
14. PRESET: This mode selects an interference-free channel from preset-groups. There are 4 preset groups. In each
group there are 8 preset channels (see Table 1). This allows up to 8 systems to be used simultaneously.
15. Volume Control: Use this rotary control to adjust the receiver output level to match the input sensitivity of an audio
mixer or an amplifier.
16. Antenna Input Connector: BNC-type connectors provide connection to the supplied antennas or to coaxial cable
used with an antenna divider, antenna boosters or remote antennas.
17. Balanced Output: 3-pin XLR connector provides balanced low-impedance output.
18. Unbalanced Output: Unbalanced 6.3mm mono jack audio output for connecting to a line point.
19. Mic/Line Switch: Use this to adjust output (XLR balanced connector and 6.35mm unbalanced phone jack) for
microphone (-20dB) or line-level (0dB).
20. Squelch: Use the squelch to adjust the output level to suppress noise. The higher the squelch control, the lower
the sensitivity of the receiver and smaller the service area of the system. Set the squelch to minimum before
turning the receiver on. If you have unwanted noise increase the squelch control until the noise disappears.
21. DC IN: DC Input connector for the included 12V DC power supply.
Page 3
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Connection:
1. Connect the cable, one end to the balanced or unbalanced output jack of the receiver, the other end to the mic mixing
input of amplifier, audio mixer etc.
2. For best results set the output volume control at about three quarter level and adjust mixer / amplifier 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. Note: setting the squelch high (towards max) will reduce the range of the system.
4. When the receiver is not in use disconnect from the mains power.
CHANNEL SELECTION MODES:
The receiver operates in three channel selection modes.
Use the button to select the MANUAL mode so
that the ‘MANUAL’ marker appears on the LCD
display.
Press the SET button for two seconds until the
‘MUTE’ marker appears on the receiver’s LCD
display, and when the frequency and channel data
start flashing, then release the button.
Use the button to select the frequency. Hold the
up arrow button to fast forward through all available
frequencies until a suitable frequency is found.
Press the SET button to lock the setting or let the
selected channel and frequency values keep
flashing five times, until they lock into that setting.
Manual Channel Selection:
This mode allows you to manually select interference free channels. Table 1 shows the frequencies available. If two
transmitters are being used in the same area, ensure the selected frequencies are at least 10 channel spaces apart.
This reduces interference.
Page 4
520-550MHz
FREQ.
520.050
520.075
520.125
520.175
520.225
520.275
520.325
520.375
520.425
520.475
520.525
520.575
520.625
520.675
520.725
520.775
520.825
520.875
520.925
520.975
521.025
521.075
521.125
521.175
521.225
521.275
521.325
521.375
521.425
521.475
521.525
521.575
521.625
521.675
521.725
CH
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
FREQ.
521.775
521.825
521.875
521.925
521.975
522.025
522.075
522.125
522.175
522.225
522.275
522.325
522.375
522.425
522.475
522.525
522.575
522.625
522.675
522.725
522.775
522.825
522.875
522.925
522.975
523.025
523.075
523.125
523.175
523.225
523.275
523.325
523.375
523.425
523.475
CH
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
FREQ.
523.525
523.575
523.625
523.675
523.725
523.775
523.825
523.875
523.925
523.975
524.025
524.075
524.125
524.175
524.225
524.275
524.325
524.375
524.425
524.475
524.525
524.575
524.625
524.675
524.725
524.775
524.825
524.875
524.925
524.975
525.025
525.075
525.125
525.175
525.225
CH
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
FREQ.
525.275
525.325
525.375
525.425
525.475
525.525
525.575
525.625
525.675
525.725
525.775
525.825
525.875
525.925
525.975
526.025
526.075
526.125
526.175
526.225
526.275
526.325
526.375
526.425
526.475
526.525
526.575
526.625
526.675
526.725
526.775
526.825
526.875
526.925
526.975
CH
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
FREQ.
527.025
527.075
527.125
527.175
527.225
527.275
527.325
527.375
527.425
527.475
527.525
527.575
527.625
527.675
527.725
527.775
527.825
527.875
527.925
527.975
528.025
528.075
528.125
528.175
528.225
528.275
528.325
528.375
528.425
528.475
528.525
528.575
528.625
528.675
528.725
CH
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
Continued next
page
FREQ.
528.775
528.825
528.875
528.925
528.975
529.025
529.075
529.125
529.175
529.225
529.275
529.325
529.375
529.425
529.475
529.525
529.575
529.625
529.675
529.725
529.775
529.825
529.875
529.925
529.975
530.025
530.050
530.075
530.125
530.150
530.175
530.225
530.250
530.275
530.325
CH
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
FREQ.
530.350
530.375
530.425
530.450
530.475
530.525
530.550
530.575
530.625
530.650
530.675
530.725
530.750
530.775
530.825
530.850
530.875
530.925
530.950
530.975
531.025
531.050
531.075
531.125
531.150
531.175
531.225
531.250
531.275
531.325
531.350
531.375
531.425
531.450
531.475
CH
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
FREQ.
531.525
531.550
531.575
531.625
531.650
531.675
531.725
531.750
531.775
531.825
531.850
531.875
531.925
531.950
531.975
532.025
532.050
532.075
532.125
532.150
532.175
532.225
532.250
532.275
532.325
532.350
532.375
532.425
532.450
532.475
532.525
532.550
532.575
532.625
532.650
CH
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
FREQ.
532.675
532.725
532.750
532.775
532.825
532.850
532.875
532.925
532.950
532.975
533.025
533.050
533.075
533.125
533.150
533.175
533.225
533.250
533.275
533.325
533.350
533.375
533.425
533.450
533.475
533.525
533.550
533.575
533.625
533.650
533.675
533.725
533.750
533.775
533.825
CH
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
FREQ.
533.850
533.875
533.925
533.950
533.975
534.025
534.050
534.075
534.125
534.150
534.175
534.225
534.250
534.275
534.325
534.350
534.375
534.425
534.450
534.475
534.525
534.550
534.575
534.625
534.650
534.675
534.725
534.750
534.775
534.825
534.850
534.875
534.925
534.950
534.975
Page13
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
CH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Ceiling mount antenna
Vertical mount antenna booster
Mounting bracket to suit C 8842A antenna booster
For long distance requirements or special or difficult applications such as stadiums, auditoriums, shopping centres, a range of
accessories are available to increase transmission distance or to reduce drop outs.
These include:
C8841A
C8842A
C8843A
Antenna splitter / combiner
Antenna divider
In addition to the above, for multiple system installations a range of accessories are available to aid cabling and installation.
These include:
C8844A
C8846A
UHF Antenna
Antenna
Mounting
Bracket
Antenna Booster
For further information on these and technical help please contact your nearest Redback dealer or consult the product manuals
for the above.
The detachable antenna is
highly recommended for
long-distance purposes, such
as in a stadium or in an
auditorium.
The antenna booster is
designed for long distance
receiving applications,
eg. if the distance exceeds
30M.
Page 12
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Scan Channel Selection:
This mode automatically searches for an interference free channel.
Note: Have the transmitter 1m from the receiver when using this function.
Use the button to select the SCAN mode so that
the ‘SCAN’ marker appears on the LCD display.
Press the SET button for two seconds until the
‘MUTE’ marker appears on the receiver’s LCD
display, and when the frequency and channel data
start flashing, then release the button.
Use the button to allow the unit to scan for a
vacant or unused frequency. Press the up arrow
button to initiate each frequency channel search
– no need to hold button.
Press the SET button to lock the setting or let the
selected channel and frequency values keep
flashing five times, until they lock into that setting.
Page 5
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
WHEN TWO OR MORE WIRELESS MICROPHONES (HANDHELD AND/OR LAVALIER) ARE USED IN THE SAME
LOCATION ENSURE THAT 10 OR MORE CHANNEL SPACES ARE BETWEEN EACH SELECTED FREQUENCY SO
THAT INTERFERENCE DOES NOT OCCUR.
CH 4
CH 3
CH 2
CH 1
245
162
47
2
CH
531.475
528.075
522.325
520.075
GROUP 1
204
133
113
18
CH
530.125
526.625
525.625
520.875
GROUP 2
350
308
95
32
CH
534.975
533.575
524.725
521.575
GROUP 3
504
447
323
182
65
CH
540.175
538.225
534.075
529.075
523.225
GROUP 4
541.425
529
543.575
537.525
549.875
535.925
572
378
698
426
542.075
532.125
548.925
539.575
679
542
264
547.325
488
548.025
542.675
661
647
536.625
545.375
554
546.525
399
631
608
CH 5
CH 7
Sound Interference
No Sound Output
• Check the receiver volume level is not set too high.
• Check for interference from other devices - wireless microphones, TV, radio etc.
• When using two or more microphone sets simultaneously, ensure that the chosen
frequencies do not interfere (see Table 1 for frequency guide).
• Check for interference from other devices - wireless microphones, TV, radio etc.
• Improve antenna location.
• Check the transmitter and receiver power supply and switch.
• Check that the transmitter and receiver are tuned to the same frequency.
• Check that the audio amplifier or mixer is switched on and that the receiver
output is connected.
• Check whether transmitter is too far away from receiver or SQUELCH control
set too high.
• Check whether transmitter or receiver is located too close to a metal object or there are
obstructions between transmitter and receiver.
DESIGN AND SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
Page 11
PRECAUTIONS:
* Avoid extremely dirty or dusty environments.
* Avoid use in areas where extremely high humidity is present.
* Do not drop the microphone on a hard concrete floor, nor strike the microphone head front with fist or fingers,
nor blow strongly into the microphone head front.
* Remove the battery in microphone if not in use for a long time. This will prevent damage that a defective
"leaking" battery may cause.
Distortion
TROUBLESHOOTING:
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 power is low. In such a case, adjust receiver antenna or change battery.
CH 8
CH 6
TABLE 1: 520-550MHz
Note: TWO OR MORE WIRELESS MICROPHONES WHICH TRANSMIT AT THE SAME FREQUENCY CAN NOT BE
USED IN THE SAME LOCATION.
Preset Channel Selection:
This mode is used when multiple C 8890C systems are used in the same area. Each receiver is setup to use PRESET mode. This
allows each receiver to select a channel in one of four preset groups. Within each preset group is eight selectable channels. See
Table 1 for a list of frequencies within each preset group. Once configured, up to eight transmitters and receivers may be used in
the same location without 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 twelve.
If interference still occurs (which is due to harmonics) select another frequency. TABLE 1 shows 4 groups of 8
frequencies which may be used together in the same area. ALTERNATIVELY USE THE SCAN FUNCTION.
button to select a preset group.
Press the SET button to lock the setting or let the
selected channel and frequency values keep
flashing five times, 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 the
channel selection zone within the chosen preset
group.
Press the
Press the SET button for two seconds until the ‘MUTE’ marker
appears on the receiver’s LCD display, and when the
frequency and channel data start flashing, then release the
button.
There are four preset groups each with eight preset channels.
Use the button to select the PRESET mode so that
the ‘PRESET marker appears on the LCD display.
If interference occurs within the selected preset group, try switching to the next preset group. If all groups exhibit interference,
use manual or auto scan mode to find a suitable channel.
Page 6
Line IN
Line IN
AUDIO MIXER
Mic IN
6.35mm Stereo jack Lead
Line OUT
Line OUT
AMPLIFIER
AMPLIFIER
B.
SPEAKER
SPEAKER
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
Mic IN
AUDIO MIXER
Fig 4. Wireless Receiver Connection Via Mic In
WIRELESS
RECEIVER
3 Pin XLR Lead
WIRELESS
RECEIVER
Fig 5. Wireless Receiver Connection Via Line In
A.
Figure 6: The unit may be 19” rack mounted individually, shown in (A). Or side by side
with an additional receiver, shown in (B).
Page 10
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
SY
N
C
When the ‘SYNC’ marker disappears from the LCD
display and the RF signal shows up, it will lock the
setting and memorize the channel. Now the
Receiver and the handheld units are paired.
Keep pressing the SYNC button on the Handheld
Mic/Bodypack. Then press the SYNC button on the
receiver at the same time.
Press and hold the SYNC button on the Handheld
Mic/Bodypack. The ‘SYNC’ marker will start
flashing on the receiver LCD display.
SYNC Mode:
Select the SYNC mode to quick match the interference-free channel on the receiver with Handheld Mic/Bodypack.
First use one of the other modes to select an interference-free channel.
When using SYNC function, the distance from the receiver and transmitter should be within one metre.
1M
Page 7
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
PLEASE NOTE: ALL TRANSMITTERS ARE SOLD SEPARATELY
6. Battery Cover
7. Colour Clip: This colour clip helps to identify the
frequency for multi-channel systems operation.
8. Anti Roll Ring: Prevents microphone from rolling
when placed on furniture.
5
Handheld Transmitter Features:
• High sensitivity unidirectional dynamic capsule reduces unwanted handling noise to a minimum
• Special noise absorption design which eliminates switch shock and handling noise.
• PLL synthesised control.
• Accepts two AA batteries (not supplied).
• Low battery LED indicator.
7
4
Figure 2: Handheld Microphone Transmitter C 8892C
8
1
2
6
3
1. Grille: Protects the microphone capsule and helps
reduce breath sounds and wind noise.
2. LCD: Displays channel number & battery level.
3. Power ON/OFF Switch
4. Battery Compartment
5. SYNC button: For frequency pairing with receiver.
Operation: (See Fig 2.)
1. Unscrew to open the battery compartment.
2. Insert two 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 power switch until the LCD illuminates to switch on. The LCD shows channel number and battery status.
5. To change channel/frequency, press the SYNC button and synchronise the receiver and transmitter frequency. See SYNC
Mode for operation description.
6. To switch off, press and hold the power button until the LCD displays ‘OFF’.
7. Remove the batteries from the unit if it is not to be used for a long time. This will prevent damage to the unit that a defective
leaking battery may cause.
Page 8
REDBACK® C 8890C 700 Channel UHF Band Diversity Wireless Mic System
10
1 2
7
5
6
Beltpack Microphone:
A range of microphones and pickups are available for the belt pack transmitter including tie clip mic, lecture type headset,
aerobics type headset and guitar. The belt pack microphone is equipped with a line/mic switch.
3
4
11
Power ON/OFF Switch
Mini XLR Connector: For microphone or guitar pick-up.
Antenna: Permanently connected, helical antenna.
LCD: Displays channel number and battery power level.
SYNC: For frequency pairing with the receiver.
Mic/Line Selector: This switch sets the audio input either to microphone level or line level.
Gain: This rotary control adjusts the input audio level of the transmitter. The gain adjustment range is 10dB.
Mic Unit: Pictured with the C 8893C lapel.
Tie Clip: To clip on the tie or lapel for free-movement.
Cable: With mini XLR connector cable to connect the transmitter.
Battery Compartment
8
9
Figure 3: Beltpack Microphone Transmitter C 8893C
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Operation: (See Fig 3.)
1. Slide open the battery compartment.
2. Insert two 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. Connect the microphone or guitar pick-up to the unit.
5. For microphone set the mic/line switch to mic. For guitar input set to line.
6. To switch on, push the power switch until the LCD illuminates. The LCD shows channel number and battery status.
7. To change channel/frequency, Press the SYNC button and synchronise the receiver and transmitter frequency. See SYNC
Mode for operation description.
8. Adjust gain to optimum level. If the unit overdrives reduce gain.
9. To switch off, press and hold the power 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 will prevent damage to the unit that a defective
leaking battery may cause.
Page 9
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