Operating Instructions
Contents
1. 00000 81 01 On 00000000 0000000 0 O7pO1O1rO10 0 0 S1O2O20201 Og Od OO 000000 0 6 0000000 imma ie i l AUDIO MIXER Q O 000000 LOUDSPEAKER AMPLIFIER LOUDSPEAKER Page 3 REDBACK C 8870F UHF Band Diversity Wireless Mic System 15 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 be2. 625MHz 11 541 125MHZz 11 541 125MHz Labo araMhz 16 549 525MHz 14 a AA a ae dh all AZ a Mhz 16 549 525MHz Page 10 REDBACK C 8870F UHF Band Diversity Wireless Mic System SPECIFICATIONS Receiver Carrier Frequency Ranget cccccccscssssccceeeeesueeeeeeueseeeeeeeees UHF band 520 550MHz 161 2106 cae enar eee wer a E roe We See NE es rear en PLL synthesized MOWO servic tcctanesiniecinietniv iin ctudictaiecietitaieciercimmamiues FM Frequency SLADINDY ier tcercincecincsessacciveustadudstecsvieatseciesteesctnes 0 005 NTO eee te eaten esate ec etc eee estes gt 100dB at 20kHz deviation and 60dBV antenna input Maximum Deviation aiscuaerastrhoninta rt cdor sta beta tale bailudatbwn deta rheatbiniadeh 20kHz Image and Spurious Rejection nccrne 80dB minimum Receiving Sensitivity 0 0 cece ccc ccceeeeeeeesseeeeeeeeeeeeaeeeeeeeenenens 6dBuV SGN atest tees tented statics E easeeeseeeeneedeee 50dB AF Response sae cee ts see traciete seep aan EEA 50Hz to 15kHz E a E e eee sarc terete tease EE eee ees ete eae 1 at 1kHz IF FOUGNO eerren e a Ist 243 95MHz 2nd 10 7MHz Dynami Range sorrienni a eani gt 100 dB TODE INN e EN 32 68kHz PO 10 11 Uj egmee nae aeons A ee Balanced and unbalanced outputs POV SEDI ace seiea a a cee ese eestor tees 12Vdc Current Conc UmU aaea About 250mA Handheld Beltpack Transmitter Carrier Frequency Range cccccccscssssccceeeeeeueeeeeeueeueeeeeeees UHF band 520 550MHz RF POM OUI sisar
3. 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 e High sensitivity cardioid capsule reduces unwanted handling noise to a minimum e Special noise absorption parts inside the barrel which eliminate switch shock noise and handling noise e Easy opening battery compartment for quick replacement Requires two AA sized 1 5 V batteries not supplied to power the condenser mic e Low battery LED indicator 1 Grille Protects the microphone capsule and helps reduce breath sounds and wind noise The grille for the various microphone capsules differ in appearance 2 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 3 Power Press for two seconds to turn transmitter on or off 4 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
4. optional bracket C 8843 or C 8843Ato suit C 8842A BNC female connector for connecting with ya UHF antenna B amp BNC female connector for connecting L with cable or antenna booster i long distance required Screw adapter to screw antenna holder UHF Antenna on a microphone stand C 8842A Booster B or _ C 8843A Bracket os Od gt OOOO O_o AoT wee ain HR G LO E a BALANCED gt U EE a E g 3 er Page 9 REDBACK C 8870F UHF Band Diversity Wireless Mic System APPENDIX TROUBLE SHOOTING Problem Solution No Sound 2 e Check that the transmitter and receiver are tuned to the same frequency Check the power supply of the microphone and receiver e Check whether the hi fi appliance is switched on and the receiver output is connected to the audio amplifier or mixer output e Check whether the transmitter is too far away from the receiver or the SQUELCH is set too high e Check whether the reciever is located too near metal ob
5. the battery housing 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 chosenand set Also turn on the amplifier or mixer and any other connected hi fi devices li Unscrew battery cover and insert batteries into the battery holder correctly ili 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 i 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 Page 6 REDBACK C 8870F UHF Band Diversity Wireless Mic System Figure 4 Beltpack UHF Transmitter Functions C8875E BELTPACK TRANSMITTER See Figure 4 The Beltpack Transmitter operates in UHF band frequency with PLL synthesized control There are
6. 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 POWER Press for 4 seconds to power the transmitter on or off 2 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 3 Antenna Permanently connected helical antenna 4 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 5 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 7 GAIN The rotary control adjusts the input audio level of the transmitter The gain adjustment range
7. 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 surface e Do not place the appliance near heat sources such as radiators stoves amplifiers or other electrical equipment e Do not expose it to direct sunlight extremely dirty or dusty environments excessive moisture or humidity and significant vibration e Use good quality batteries matching brand and model e Remove the battery from the transmitter if the appliance will not be used for a long period Doing so will avoid any damage that may result from a defective leaking battery e Do not throw used batteries into a fire Be sure to dispose of used batteries in accordance with local waste disposal rules e 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 REDBACK C 8870F UHF Band Diversity Wireless Mic System Usage Guidelines e 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 e 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 e Use the gain con
8. REDBACK C 8870F UHF Band Diversity Wireless Mic System UHF BAND TRUE DIVERSITY WIRELESS MICROPHONE SYSTEM C8870F UHF RECEIVER Operating instructions Distributed by Altronic Distributors Pty Ltd Perth Western Australia Phone 1300 780 999 Fax 1300 790 999 Internet www altronics com au REDBACK C 8870F 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 520 550MHz with 16 selectable channels Please read this instruction manual completely before operating the system These instructions cover the transmitters plus receiver model C 8870F 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 8870F FEATURES e Provides flexible and professional performance for stages stadiums places of worship and professional sound installations e Operates on UHF frequency band range 520 550MHz with synthesized control e PLL Phase Locked Loop synthesized wireless microphone system with 16 selectable frequencies making it easy to choose interference free channels e Auto Scan technology for easy and fast channel set up e True Diversity with two antennas to ensure the highest reception quality e
9. Super high sensitivity extremely low noise transmission and reception e Excellent reception system ensures super high sensitivity e Units are supplied with SMT assembled PCB modules ensuring high reliability and easy serviceability e High signal noise ratio high sensitivity and wide dynamic range e High dynamic range handheld microphone for all vocal applications e Lapel microphone that minimises static pickup resulting in very low noise Receiver Features e 12V 18V d c power supply supplied e Easy rotary switch selection of frequencies all hidden from users view e 1 2 19 size case with power and RF indicators Rack ears available for mounting one or two systems into 19 rack equipment e Removable aerials making the unit suitable for portable or fixed installations Aerials are fitted with BNC connectors e 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
10. i aa eana 10mW max SO seca scepter tet nee eens teeeseee te eee PLL synthesized Frequency SLAIN Sor tececintecinancotenineeetadundetsescduetsceevethencdes 0 005 Maximum Deviation atacuciainatnineteinateducteiecieitatamas maeasinatiadan 20kHz with limiting compressor Spurious EMISSION eases seta te eee Sates caesar ia ii gt 60dB below carrier frequency EAE ec saree csc tarde eas ots cores ea eet lt 1 at 1kHz Microphone Cartridge e Handheld Unidirectional dynamic or Unidirectional electret condenser unit e Lapel Unidirectional electret condenser unit Operating voltage gases teracetnsaes enseeeseieete iniiae 3Vdc x 2 AA 1 5Vsize batteries Current Consumption iesi 120mA MAX Note Design and specifications are subject to change without notice Page 11 REDBACK C 8870F UHF Band Diversity Wireless Mic System Distributed by Altronic Distributors Pty Ltd Perth Western Australia Phone 1300 780 999 Fax 1300 790 999 Internet www altronics com au 26 11 2014 Page 12
11. ial 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 REDBACK C 8870F 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 li 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 audi
12. ing 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 Page 4 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 eo oS eS NS m e Ee m m 0 A W N Figure 2 Receiver Functions True Diversity Detachable Antenna 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 OdB 14 SQUELCH The SQUELCH level is adjustable via the adjustment d
13. is 10dB Use a screwdriver to change the level 8 Microphone The unidirectional electret condenser unit features a wide frequency response for a warm rich bass and a clear sound 9 Tie Clip To clip on the tie or lapel to allow free movement 10 Cable With mini XLR connector cable to connect to the transmitter 11 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 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 i 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 butto
14. jects or there are obstructions between transmitter and receiver Sound Interference e Check the antenna location e When using two or more microphone sets simultaneously ensure that the chosen frequencies for each microphone do not interfere with each other e Check whether the interference comes from other wireless devices mics TV radio etc Distortion e Check to see if the receiver volume is set too high or too low e Check whether there is any unwanted interference coming from other devices Table 1 Frequency Cross Reference Chart CH1 520 125MHz CH9 534 225MHz CH2 520 825MHz CH 10 535 625MHz CH3 521 925MHz CH 11 541 125MHz CH4 525 025MHz CH 12 543 225MHz CHS 525 925MHz CH 13 544 125MHz CH6 528 525MHz CH 14 544 825MHz CH7 529 425MHz CH 15 545 725MHz CH8 532 325MHz CH 16 549 525MHz Series 2 Transmitters Rotary Switch MHz Table 2 Receiver Frequency groups chart Group A Group B Group C Group D Use only these channels in the same location at CH Frequency CH Frequency CH Frequency CH Frequency the same time 1 520 125MHz 2 520 825MHz 1 520 125MHz 520 825MHz Other channels used together will not provide 2 520 825MHz 5 525 925MHZz 3 521 925MHz 525 025MHz interference free 3 521 925MHz 7 529 425MHz 5 525 925MHz aa ansmission 6 528 525MHz 8 Dasa VillZz 7 529 425MHz 10 535 625MHz 7 529 425MHz 9 DSA W225 Miz 9 DO Ao el Zia a 222M 9 534 225MHZz 10 535 625MHz 10 535 625MHZz 14 544 825MHz 10 535
15. n 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 Page 7 REDBACK C 8870F UHF Band Diversity Wireless Mic System 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 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 Connecting the receiver to an audio mixer or an amplifier In order to make sure the sound quality and avoid distor
16. o mixer etc li 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 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 Page 5 REDBACK C 8870F 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 2 Figure 3 Handheld Microphone UHF Transmitter Functions C8872E HANDHELD MICROPHONE TRANSMITTER See Figure 3 The handheld microphone
17. tion please adjust the volume level according to following instructions e 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 e 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 77OmV Note Never use the balanced and unbalanced audio outputs at the same time This may cause signal loss or increased noise Figure 5 Fitting the rack mounting brackets to the unit 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 Cl 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 8870F UHF Band Diversity Wireless Mic System Figure 6 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
18. trol to adjust the sensitivity of the transmitter s audio to the level of the connected lapel microphone or instrument e To avoid interference do not put the receiver too near to metallic objects and avoid obstructions between the transmitter and receiver e Move the transmitter around the area where you propose to use the system If you find any dead spots change the receiver position If that does not work try to avoid the dead spots e Avoid the interference from TV radio other wireless appliances and etc e Avoid extremely dirty or dusty environments e 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 as this may cause signal loss or increased noise Figure 1 Common Connections roll z isl ae AC DC ADAPTER ap Balanced or unbalanced audio cable
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