Redback C 8856A User manual

REDBACK®UHF Band Diversity Wireless Microphone System
®
O
OPERA
PERATING TING
I
INSTRUCTIONS
NSTRUCTIONS
Manufactured in Taiwan for Altronic Distributors Pty Ltd
REDBACK®UHF Band In-ear Monitoring System REDBACK®UHF Band In-ear Monitoring System
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C 8856A UHF BAND IN-EAR
MONITORING SYSTEM

REDBACK®UHF Band In-ear Monitoring System REDBACK®UHF Band In-ear Monitoring System
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Congratulations on purchasing a REDBACK UHF Band In-ear Monitoring System. With UHF 16 preset
selectable frequencies, the mini receiver with wireless transmitter can provide in-ear monitoring for every
performer on stage, for hearing impaired systems or tour groups. The system is designed for high audio
quality and reliable interference free transmission.
Please read this instruction manual completely before operating the system.
System Features:
• UHF 16 preprogrammed selectable frequencies
• Compander circuitry for clear audio signal.
• Tone squelch circuitry control for excellent audio reproduction.
• The compact C 8856A bodypack receiver is supplied with a high-quality mono ear-piece, which
provides each user with clear and interference free monitoring.
• Powered by two 1.5V AA size batteries.
SPECIFICATION
Frequency Range ..................................................................................................................................UHF band, 790~806MHz
Case ................................................................................................................................................................................Mini case
Receiving System ..........................................................................................................................PLL synthesized, 16-Channel
Receiving Mode........................................................................................................................................................................FM
Frequency Stability ........................................................................................................................................................±0.005%
Receiving Sensitivity ....................................................................................................................at 8dBmV over 80dB S/N ratio
Image & Spurious Rej. ..........................................................................................................................................20dB minimum
Selectivity ............................................................................................................................................................more than 50dB
Modulation Mode ....................................................................................................................................................................FM
IF Frequency ............................................................................................................................................1st 56MHz, 2nd 10.7MHz
Dynamic Range..................................................................................................................................................................> 96dB
Tone Signal ..................................................................................................................................................................32.768KHz
S/N Ratio ..................................................................................................> 94dB, @ 48KHz deviation & 60dBmV antenna input
AF Response ............................................................................................................................................50Hz to 15KHz (±3dB)
T.H.D. ......................................................................................................................................................less than 1.0% (at 1KHz)
Power Supply ..............................................................................................................................................................AA x 2 pcs
Audio Output ..................................................................................................................Unbalanced output : 800mV(load:32W)
Current Consumption ............................................................................................................................................110mA±10mA
Dimension ..............................................................................................................................................106W x 70H x 25D (mm)
Operating Instructions
1. Push to open the battery cover. Insert two 1.5V batteries into the battery compartment Jaccording to
polarity (+) and (-) indication marked on the housing.
2. Tune the in ear monitor to the same frequency as the transmitter so that there is no interference in the
local area for the receiver and transmitter. Use table 1 to set the rotary switch Ito the correct setting.
3. Screw on the earpiece.
4. When switching on the power, the LED Elights to indicate that RF signal is being received.
5. Adjust the output level with the volume rotary control C.
6. When the LED Eflashes this indicates that the batteries are flat. Replace batteries or if using recharge-
ables, connect to charging input.
7. To recharge the batteries, connect the cable as per figure 2. Full battery charging time is approx 10 hours
(for 1800mAH batteries).
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1
13
9
5
1. 3.5mm screw type jack socket
2. Volume level control
3. Power ON/OFF switch
4. Signal LED
5. Antenna
6. Belt clip
7. Charging input
8. Channel selector switch
9. Battery compartment
10. Mono earpiece Fig. 1: A diagrammatic view of the C 8856A Beltpack per-
sonal In-ear monitor. Refer to this diagram when reading
the text.
Table 1 : Frequency Cross Reference Chart.
Ch1: 790.375
Ch2: 791.125
Ch3: 792.125
Ch4: 793.250
Ch5: 794.250
Ch6: 795.125
Ch7: 796.250
Ch8: 797.375
Ch9: 798.375
Ch10: 799.875
Ch11: 800.875
Ch12: 801.625
Ch13: 802.750
Ch14: 803.875
Ch15: 804.750
Ch16: 805.375
Use only these channels in the
same location at the same time.
Other channels used together
will not provide interference
free transmission.
Channel 1
Channel 5
Channel 9
Channel 10
Channel 14
Channel 15
41 2 3
5
6
7
8
9
10

REDBACK®UHF Band In-ear Monitoring System REDBACK®UHF Band In-ear Monitoring System
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Using C 8858 5 port charging module
C 8858
C 8856A C 8856A C 8856A C 8856A C 8856A
Plugpack
(included with
C 8858)
Fig. 2: Connecting the personal receivers to the charging circuit.
Up to 5 personal receivers may be charged at the same time.
Charging current is supplied via an external power supply.
IMPORTANT NOTE:
DO NOT CONNECT THE
CHARGER CABLE WHEN
USING NON-RECHARGEABLE
(DRY CELL / ALKALINE)
BATTERIES IN THE RECEIVER.
PRECAUTIONS:
* AVOID EXTREMELY DIRTY OR DUSTY ENVIRONMENTS.
* AVOID AREAS WHERE THERE IS EXTREMELY HIGH HUMIDITY.
* TWO OR MORE WIRELESS MICROPHONES (HANDHELD AND/OR LAVALIER) WHICH
TRANSMIT AT THE SAME FREQUENCY CAN NOT BE USED IN THE SAME LOCATION AS
THIS WILL CAUSE INTERFERENCE IN THE PERSONAL IN-EAR MONITOR.
Troubleshooting:
1. 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.
2. Do not drop the in-ear monitor.
3. Remove the battery from in-ear monitor if not in use for a long time. This will prevent damage that
a defective "leaking" battery may cause.
Hard wired microphone
CD Player
to line input
CD Player (Japanese)
to line input
CD Player (English)
to line input
()*+
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System Examples
The C 8856A units receive signal directly from C 8872C or C 8875C transmitters (fig. 3 & 4). This is
especially useful for tour guides requiring mobile communication with a group of people. Alternatively,
the C 8856A units receive signal from C 8854 desktop transmitter (fig 5 & 6). This is useful for fixed
installations utilising recorded music or vocal tracks. Additional transmitters may be set up on separate
frequencies allowing multiple language soundtracks for art galleries, museums, tourist venues etc.
See table 1 for information on selecting frequency channels.
Fig. 5: This set up allows background
music or recorded vocal track as well
as a hard wired microphone for live
announcements. Inputs can be mixed
via front panel controls.
Fig. 6: This set up allows multi
lingual transmissions to personal
receivers. Especially useful for
galleries, museums and tour
operators.
Fig. 3: Direct wireless transmission from C 8872C
handheld microphone.
Fig. 4: Direct wireless transmission from C 8875C
beltback/lavalier microphone.

REDBACK®UHF Band In-ear Monitoring System REDBACK®UHF Band In-ear Monitoring System
2 x 1.5V AA
1. Screen head
2. Low battery LED Indicator
3. On/Off switch
4. Battery cover
5. Battery housing
6. Frequency selector
7. 12V DC charging input
Fig. 7: Handheld Microphone
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5
6
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LINE M IC.
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LO W B ATT
INPUT
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1
13
9
5
1. On/Off switch
2. Low battery LED Indicator
3. Line/mic switch
4. Cable
5. Antenna
6 Frequency select.
7. Gain control
8. Lavalier microphone
9. Tie clip
10. Battery compartment
11. Battery charger socket
1
2
3
7
8
9
10
11
5
6
4
Fig. 8: Lavalier Beltback
C 8875C Lavalier Beltpack Transmitter:
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 pickup. The belt pack transmitter is equipped with
a line/mic switch.
Operation: (See Fig. 8 for details)
1. Push to open the battery cover.
2. Insert 2 x 1.5V AA batteries into the battery holder according to polarity (+) and (-) indication marked
on the battery housing.
3. Replace Battery Cover.
4. Connect the microphone or guitar pickup to the unit.
5. Set the line / mic switch to match the sound source (line / mic). Line is for guitar/instrument pick up.
6. After setting the chosen frequency to the same frequency as the receiver, push the power switch to
“ON”. The LED indicator will flash to indicate the unit is operational.
7. Push the power button to “OFF” when mic is not used, and remove the battery in beltpack if not
used for a long time. This will prevent damage to the unit that a defective "leaking" battery may cause.
8. If the LED indicator is permanently illuminated, the battery needs to be replaced.
9. If the LED indicator does not flash at all when first switched on then check batteries are inserted
correctly and batteries are not completely flat.
10. To recharge the batteries, connect the recharging cable as per figure 2 (transmitters can also be charged
via C 8858 5 port charging module). Full battery charging time is approx 10 hours (for 1800mAH
batteries).
Suitable transmitters for use with C 8856A
In-Ear Monitoring System:
The following information is provided as a guide for using the C 8872C and C 8875C transmitters as
part of a whole system. Please note that these transmitters are available separately and are not
included with the C 8856A In-Ear Monitor or C 8854 Desktop Transmitter.
C 8872C Handheld Transmitter:
Operation: (See Fig. 7 for details)
1. Push to open the battery cover.
2. Insert 2 x 1.5V AA batteries into the battery holder according to polarity (+) and (-) indicator
marked on the battery housing.
3. Replace battery cover.
4. After setting the chosen frequency to the same frequency as the receiver, push the power switch to
"ON". The LED indicator will flash once to indicate the unit is operational.
5. Push the power button to "OFF" when mic is not in use. Remove the batteries from the unit if not to be
used for a long time. This will prevent damage to the unit that a defective "leaking" battery may cause.
6. If the LED indicator is permanently illuminated, the battery needs to be replaced.
7. If the LED indicator does not flash at all when first switched on then check batteries are inserted
correctly and batteries are not completely flat.
8. To recharge the batteries, connect the recharging cable as per figure 2 (transmitters can also be charged
via C 8858 5 port charging module). Full battery charging time is approx 10 hours (for 1800mAH
batteries).
TRANSMITTER SPECIFICATIONS:
Carrier Freq. Range (UHF band): ......................790~806MHz
RF Power Output: ...................................................... 10mW.
Spurious Emission (below carrier freq.):...................... >60dB
Frequency Stability (with PLL control):.......... Within ±0.005%
AF Response (+/-3dB): .................................. 50Hz to 15KHz
Maximum Deviation (with compressor): ....................± 48KHz
Signal to Noise Ratio (A-Weighted): ..............................94dB
Microphone Capsule: ............................................Condenser
Operating voltage:......................................................1.5V x 2
Current consumption: .................................................. ≈ 65mA
LED Indicator: ....................................Power On-Standby-Off
....................................................................Low battery
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