null  null
Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999
Internet: www.altronics.com.au
29/11/2011
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Page 12
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
®
UHF BAND TRUE
DIVERSITY WIRELESS
MICROPHONE SYSTEM
O PERATING
I NSTRUCTIONS
Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia.
Phone: 1300 780 999 Fax: 1300 790 999
Internet: www.altronics.com.au
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Congratulations on purchasing a REDBACK PLL Synthesized True Diversity Wireless Microphone
system. The PLL synthesized true diversity wireless microphone system operates on UHF frequency
band between 540-570MHz, with 16 selectable channels. Please read this instruction manual completely
before operating the system. These instructions cover the transmitters, plus receiver model C 8870E.
Please read this instruction manual carefully before operating the system. This manual covers the function
and operation of the wireless microphone system - transmitter and receiver C 8870E.
FEATURES:
• Provides flexible and professional performance for stages, stadiums, places of worship, and
professional sound installations.
• Operates on UHF frequency band range 540-570MHz with synthesized control
• PLL (Phase Locked Loop) synthesized wireless microphone system with 16 selectable frequencies,
making it easy to choose interference free channels.
• Auto-Scan technology for easy and fast channel set-up.
• True Diversity with two antennas to ensure the highest reception quality.
• Super high sensitivity, extremely low noise transmission and reception.
• Excellent reception system ensures super high sensitivity.
• Units are supplied with SMT assembled PCB modules ensuring high reliability, and easy
serviceability.
• High signal-noise ratio, high sensitivity and wide dynamic range.
• High dynamic range handheld microphone for all vocal applications.
• Lapel microphone that minimises static pickup resulting in very low noise.
Receiver Features:
• 12V-18V d.c. power supply (supplied)
• Easy rotary switch selection of frequencies all hidden from users view.
• 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 C 8842 antenna booster.
FCC STATEMENT:
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference and;
2. This device must accept any interference received, including interference that may cause undesired
operation.
IMPORTANT: To comply with the FCC RF exposure requirements, no change to the antenna or the device
is permitted. Any change to the antenna or the device could result in the device exceeding the RF
exposure requirements and void user’s authority to operate the device.
Note: The changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
SAFETY PRECAUTIONS:
• Do not spill liquid on the appliance and do not drop it on a hard concrete floor.
• Do not place the appliance near heat sources such as radiators, amplifier, or etc.
• Do not expose it to direct sunlight, extremely dusty environments, excessive moisture, or vibration.
• Use good quality batteries to avoid any damage that may result from a defective leaking battery.
• Remove the battery from the transmitter if the appliance will not used for a long period. In order to
avoid any damage that may result from a defective leaking battery.
• Do not throw used batteries into a fire or garbage bin with domestic rubbish. Be sure to dispose of
used batteries in accordance with local waste disposal rules.
• When disposing the equipment, remove the batteries, separate the case, circuit boards, and cables, and
dispose of all components in accordance with local waste disposal rules.
Page 2
SPECIFICATIONS:
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Receiver:
Carrier Frequency Range: .......................................UHF band 540 ~ 570MHz
Oscillator: ..................................................................PLL synthesized
Modulation: ..............................................................FM
Frequency Stability: .................................................±0.005%
S/N ratio: ..................................................................>94dB at 48kHz deviation and 60dBV antenna input
Maximum Deviation:...............................................±48kHz
Image and Spurious Rejection:...............................80dB minimum
Receiving Sensitivity:...............................................6dBµV
Selectivity: .................................................................50dB
AF Response: ............................................................50Hz to 15kHz
T.H.D.: ........................................................................1% (at 1kHz)
IF Frequency: ............................................................1st - 243.95MHz; 2nd -10.7MHz
Dynamic Range: .......................................................>96 dB
Tone Signal: ...............................................................32.768kHz
Audio Output: ..........................................................Balanced and unbalanced outputs
Power Supply: ..........................................................12Vdc
Current Consumption: ............................................About 200mA
Handheld/Beltpack Transmitter:
Carrier Frequency Range: .......................................UHF band 540 - 570MHz
RF Power Output: ....................................................10mW (max.)
Oscillator: ..................................................................PLL synthesized
Frequency Stability: .................................................±0.005%
Maximum Deviation:...............................................±48kHz with limiting compressor
Spurious Emission: ..................................................>60dB below carrier frequency
T.H.D.: ........................................................................<1% (at 1kHz)
Microphone Cartridge:
• Handheld: Unidirectional dynamic or Unidirectional electret condenser unit
• Lapel: Unidirectional electret condenser unit
Operating voltage: ...................................................3Vdc x 2 AA 1.5Vsize batteries
Current Consumption: ............................................120mA (MAX.)
Note: Design and specifications are subject to change without notice.
Page 11
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
APPENDIX:
Solution
TROUBLE SHOOTING:
Problem
Check the power supply of the microphone and receiver.
Check to see if the receiver volume is set too high or too low.
Check whether the interference comes from other wireless devices, mics, TV,
radio etc.
When using two or more microphone sets simultaneously, ensure that the
chosen frequencies for each microphone do not interfere with each other.
Check the antenna location.
Check whether the reciever is located too near metal objects or there are
obstructions between transmitter and receiver.
Check whether the transmitter is too far away from the receiver, or the
SQUELCH is set too high.
Check whether the hi-fi appliance is switched on and the receiver output is
connected to the audio amplifier or mixer output.
Check that the transmitter and receiver are tuned to the same frequency.
No Sound
Sound Interference
Distortion
CH 9 555.625MHz
CH 10 561.125MHz
CH 11 563.225MHz
CH 12 564.125MHz
CH 13 564.825MHz
CH 14 565.725MHz
CH 15 567.825MHz
CH 16 569.525MHz
4
3
1
Ch
552.325MHz
549.425MHz
545.025MHz
541.925MHz
540.125MHz
Frequency
14
10
9
7
6
5
2
Ch
569.525MHz
565.725MHz
561.125MHz
555.625MHz
552.325MHz
549.425MHz
545.925MHz
540.825MHz
Frequency
13
11
10
9
7
5
3
1
Ch
564.825MHz
563.225MHz
561.125MHz
555.625MHz
552.325MHz
545.925MHz
541.925MHz
540.125MHz
Frequency
16
15
14
10
9
8
4
2
Ch
569.525MHz
567.825MHz
565.725MHz
561.125MHz
555.625MHz
554.225MHz
545.025MHz
540.825MHz
Use only these
channels in the same
location at the same
time. Other channels
used together will
not provide
interference free
transmission.
Check whether there is any unwanted interference coming from other devices.
540.125MHz
540.825MHz
541.925MHz
545.025MHz
545.925MHz
549.425MHz
552.325MHz
554.225MHz
Table 1: Frequency Cross-Reference Chart
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
CH 8
Series 2 Transmitters, Rotary Switch (MHz)
6
555.625MHz
16
Frequency
7
561.125MHz
Group D
9
569.525MHz
Group C
10
Group B
16
Group A
Table 2: Receiver Frequency groups chart
Page 10
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Usage Guidelines:
• Before setting up, make sure that the transmitter and receiver are tuned to the same frequency. Do not
use two or more transmitters operating on the same frequency.
• Turn the MIC/LINE switch on the rear of receiver to adjust receiver output level to match input level
requirements of an audio mixer or amplifier.
• Use the gain control to adjust the sensitivity of the transmitter’s audio to the level of the connected
lapel microphone or instrument.
• To avoid interference, do not put the receiver too near to metallic objects and avoid obstructions
between
the transmitter and receiver.
• While checking sound, move the transmitter around the area where you use the system to look for
dead spots. If you find any dead spot, change the receiver position. If it does not work, avoid such
places.
• Avoid the interference from TV, radio, other wireless appliances and etc.
• Avoid extremely dirty or dusty environments.
• Avoid areas where there is extremely high humidity.
BASIC CONNECTIONS:
Connect the receiver output to the audio mixer or amplifier input, using a standard audio cable with 3-pin
XLR connectors or 6.3mm phone plugs. Never use the balanced and unbalanced audio outputs at the
same time This may cause signal loss or increased noise.
Figure 1: Common Connections
Page 3
RF
AF
SET / SCAN
MIN
VOL.
MAX
Power
LED Channel Display
Channel Forward Button
Channel Backward Button
SET/SCAN Button
RF Level Indicators
AF Level Indicators
VOL Volume Control
Antenna
ANT Antenna Input Connector
BALANCED Output
UNBALANCED Output
MIC/LINE Switch
SQUELCH
DC IN
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
POWER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Figure 2: Receiver Functions - True Diversity, Detachable Antenna
1. POWER: Press for four seconds to power the receiver on or off.
2. Channel Display: LED channel displays the channel number.
3. Channel Forward Button: When the LED display starts flashing, press this button to change the
channel forward.
4. Channel Backward Button: When the LED display starts flashing, press this button to change the
channel backward.
5. SET/SCAN Button:
a. Auto Scan - Press three seconds to search for the next clean channel automatically.
b. Set Channel: Press one second to let LED channel display flashing, then press the channel button or
to change the channel. Wait LED channel display flashing five times to lock the channel or press SET
button for one second to lock the channel.
6. RF Level Indicators: five-segment meter glows to indicate RF signal strength. The more segments
glow, the stronger is the received signal. If none of these segments glow, no signal is being received.
7. AF Level Indicators: five-segment meter glows to indicate audio signal strength. The greater the
number of segments that glow, the stronger is the received signal. If none of these segments glow, no
signal is being input.
8. VOL - Volume Level Control: Use this rotary control to adjust the receiver output level to match
the input sensitivity of an audio mixer or an amplifier.
9. Antenna: Fixed-length UHF antenna poles permanently mounted.
10. ANT - 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.
11. BALANCED Output: 3-pin XLR connector provides balanced low-impedance output.
12. UNBALANCED Output: Unbalanced 6.3mm mono jack audio output for connecting to, e.g., a guitar
amplifier.
13. MIC/LINE Switch: Select output of XLR balanced connector or 6.3mm unbalanced phone jack. It can
be set for microphone (-20dB) or line-level (0dB).
14. SQUELCH: The SQUELCH level is adjustable via the adjustment dial at the back of the unit using a
screwdriver. SQUELCH adjusts the output level to protect the signal from external noise.
15. DC ONLY: d.c. input connector for the supplied a.c. adaptor.
Page 4
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
BNC
BNC
Figure 4: An antenna booster is highly recommended for long distance requirements such as in
stadiums and auditoriums. The antenna booster (C 8842 or C8842A) can be wall or mic stand
mounted to with an optional bracket (C 8843 or C 8843Ato suit C 8842A).
UHF Antenna
C 8843A Bracket
C 8842A Booster
Page 9
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Connecting the receiver to power:
1. Plug the antennas into the BNC sockets on the receiver, if the antennas are detachable, and point them
upward.
2. Check that the voltage of the supplied a.c. adapter conforms to the voltage available (110V or 220V) in
the local area. Using the wrong a.c. adapter may cause irreparable damage to this unit.
3. Plug the feeder cable of the supplied a.c. adapter into DC ONLY socket on the receiver. Then plug the
a.c. adapter into a power outlet.
L1
L1
Connecting the receiver to an audio mixer or an amplifier:
In order to make sure the sound quality and avoid distortion, please adjust the volume level according to
following instructions.
• When using a standard audio cable with 3-pin XLR connectors or 6.3mm phone plugs to plug into the
MIC IN on the audio mixer or on the amplifier, turn the VOL volume level control of the receiver to
around the one o’clock position, the output level for balanced and unbalanced output is about at
77mV.
• When using a standard audio cable with 3-pin XLR connectors or 6.3mm phone plugs to plug into the
LINE IN on the audio mixer or on the amplifier, turn the VOL volume level control of the receiver to
around the MAX position, the output level for balanced and unbalanced output is about at 770mV.
Note: Never use the balanced and unbalanced audio outputs at the same time! This may cause signal loss
or increased noise.
L2
Figure 6: Fitting the rack mounting brackets to the unit.
C1
To combine two receivers in a 19” standard rack by using two short L-type plastics rack ears (L2) and two
metal connecting plates (C1). (Each system includes an L2 and a C1.)
To mount a receiver in a 19” standard rack by using two L type long metal rack ears (L1). (L1 is an
optional accessory - check with your vendor for availability.)
Page 8
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Operation - Receiver (Manual Scan mode):
i. 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.
ii. Ensure SQUELCH is set to minimum and press the POWER button for a few seconds to turn the unit
on.
iii. Press SET/SCAN button for one second so that the LED display starts flashing.
iv. Press Channel Forward / Backward buttons to set the receiver channel. Please set the same frequency
channel (see Tables 1 and 2 in the Appendix) on the transmitter and receiver. If interference occurs
from an outside source, change the channel frequency.
v. Stop pressing the buttons and let the LED display number flash five times to lock the setting.
vi. For best results set the VOL control at about three quarters level (three o’clock position) and adjust
mixer / amplifier level to suit. Adjust SQUELCH as needed to limit noise in the signal.
vii. When the receiver is not in use, switch it off and disconnect it from mains power.
Operation - Receiver (Auto Scan mode):
i. 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.
ii. Ensure SQUELCH is set to minimum and press the POWER button for a few seconds to turn the unit
on. Also turn on the amplifier or mixer and any connected hi-fi devices.
iii. Press SET/SCAN button for three seconds to search for the next interference-free channel
automatically. The auto-scan system should stop at the next interference-free channel.
iv. Let the LED display flash five times to lock the setting.
Note 1: If user needs to set up a multi-receiver system, please keep your previous receiver-microphone
pair powered on. A maximum number of six Redback systems can be used in the one location at the same
time. To use the maximum number of frequencies in the one location at the same time consult the channel
guide, in Table 2 in the Appendix.
Note 2: Setting the SQUELCH high (towards max) will reduce the range of the system.
Note 3: There are two types of transmitters available. Both are compatible with this unit. Series 1
transmitters have a DIP switch for frequency selection. Series 2 transmitters have a rotary switch for
frequency selection. Please refer to Table 1 in the Appendix for details.
C8872D - HANDHELD MICROPHONE TRANSMITTER (See Figure 3)
The handheld microphone operates in UHF band frequency with PLL synthesized control circuitry. There
are 16 pre-programmed selectable UHF frequencies available to avoid interference. The microphone uses
either unidirectional dynamic or unidirectional condenser capsules with varying characteristics.
Features:
• High sensitivity cardioid capsule reduces unwanted handling noise to a minimum.
• Special noise absorption parts inside the barrel, which eliminate switch shock noise and handling
noise.
• Easy-opening battery compartment for quick replacement. Requires two AA-sized 1.5 V batteries (not
supplied) to power the condenser mic.
• Low battery LED indicator.
1.
2.
3.
4.
Grille: Protects the microphone capsule and helps reduce breath sounds and wind noise. The grille for
the various microphone capsules differ in appearance.
Battery LED: Indicates when the power to the unit is on. It also indicates battery life status.
When the power is turned on, the red LED will stay on to indicate the batteries have sufficient energy
to power the unit. If the LED fails to light, the battery is either dead or not positioned correctly. If the
LED stays flashing, it indicates that the battery will soon be out of power and should be replaced.
Power: Press for two seconds to turn transmitter on or off.
Battery Compartment: Insert two AA-size 1.5V dry or rechargeable batteries into the holder and
ensure that the polarity of batteries accords with the polarity (+) and (-) indicators marked on the
battery housing.
Page 5
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
1. Grille
2. Battery LED
3. Power Button
4. Battery Compartment
5. Channel Selector
6. Battery Cover
7. Colour Clip
Figure 3: Handheld Microphone UHF Transmitter Functions
5. Channel Selector: Changes transmitter channel setting. Use a screwdriver to turn the dial.
6. Battery Cover: Unscrew the bottom half of the microphone to expose battery compartment and
channel selector.
7. Colour Clip: This colour clip helps to mark the same frequency of receiver and transmitter.
Operation - Handheld Microphone:
i. Make sure the Receiver unit is plugged into the ac power, switched on and a vacant frequency chosen
and set. Also turn on the amplifier or mixer and any other connected hi-fi devices.
ii. Unscrew battery cover and insert batteries into the battery holder correctly.
iii. After setting the frequency using a screwdriver to the same frequency chosen for the receiver, place
the battery cover back onto the microphone
iv. Push the power switch to turn mic on. The LED indicator will appear as a steady red light.
v. Test the microphone and adjust the levels on the receiver or your audio mixer or amplifier.
vi. Push the power button again to turn the mic off. 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 or leaking battery may
cause.
C8875D - BELTPACK TRANSMITTER: (See Figure 4)
The Beltpack Transmitter operates in UHF band frequency with PLL synthesized control. There are 16
pre-programmed selectable UHF frequencies available to avoid interference. The microphone uses
unidirectional condenser cartridges with varying characteristics. Insert two 1.5V d.c. AA size batteries to
power the condenser mic.
A range of microphones and pickups are available for the Beltpack including tie-clip mic, lecture type
headset, aerobics type headset, and guitar pickup. The Beltpack is equipped with a MIC/LINE switch and
GAIN control.
1.
2.
3.
4.
5.
6.
7.
POWER: Press for 4 seconds to power the transmitter on or off.
Mini XLR Connector: The included electret lapel microphone cable is inserted into the connector on
the top of the bodypack transmitter case. The optional guitar pick up cable also connects here.
Antenna: Permanently connected helical antenna.
Battery LED: Indicates when the power to the unit is on. It also indicates battery life status. When the
power is turned on, the red LED will stay on to indicate the batteries have sufficient energy to power
the unit. If the LED fails to light, the battery is either dead or not positioned correctly. If the LED stays
flashing, it indicates that the battery will soon be out of power and should be replaced.
Channel Selector: Changes transmitter channel setting. Use a screwdriver to change the channels.
MIC/LINE Selector: The switch sets the audio input either to microphone level or line level.
GAIN: The rotary control adjusts the input audio level of the transmitter. The gain adjustment range is
10dB. Use a screwdriver to change the level.
Page 6
8.
9.
10.
11.
REDBACK® C 8870E UHF Band Diversity Wireless Mic System
Microphone: The unidirectional electret condenser unit features a wide frequency response for a
warm, rich bass and a clear sound.
Tie Clip: To clip on the tie or lapel to allow free-movement.
Cable: With mini XLR connector cable to connect to the transmitter.
Battery Compartment: Insert two AA-size 1.5V dry or rechargeable batteries into the slots and ensure
that the polarity of batteries accords with the polarity (+) and (-) indicators marked on the battery
compartment.
MIC.
Figure 4: Beltpack UHF Transmitter Functions
LINE
Operation - Beltpack:
i.
Make sure the receiver unit is plugged into the a.c. power, switched on and a vacant frequency
chosen and set. Also turn on the amplifier or mixer and any other connected hi-fi devices.
ii. Push to open the battery cover and insert batteries into the battery holder correctly. Replace battery
cover.
iii. Connect the microphone or guitar pickup to the unit using the mini XLR (see Note below).
iv. Set the MIC/LINE switch to match the sound source (mic or line). Line is for guitar input.
v. After setting the frequency using a screwdriver to the same frequency chosen for the receiver, push
the POWER switch to turn the unit on. The LED indicator will appear as a steady red light.
vi. Use the supplied screwdriver to adjust the GAIN to an appropriate level.
vii. Test the microphone or instrument and adjust the levels of the receiver or your audio mixer or
amplifier.
viii. Push the POWER button to turn the unit off when the Beltpack is not being used. Remove the
battery if the device is not to be used for a long time. This will prevent damage to the unit that a
defective or leaking battery may cause.
Note: When using an instrument, for step (ii), plug the 6.3mm phone plug of the optional guitar cable to
the output jack on the instrument, and the mini XLR end into audio input connector on the beltpack
transmitter.
SETTING UP THE WIRLESS RADIO SYSTEM:
Note: Prior to setting up, please check that the transmitter and receiver are tuned to the same frequency.
Two or more transmitters operating on the same frequency can not be used at the same time and in the
same area. So for each extra transmitter, select a different frequency which can be used simultaneously in
the local area.
Page 7
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement