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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
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