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Redback C 8890B, Руководство по эксплуатации

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REDBACK®  C 8890B 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 (540-570MHz) with 700 selectable channels.  Please read this instruction
manual completely before operating the system.  These instructions cover the transmitters, and receiver model C 8890B. The

receiver unit is used with compatible 700 channel handheld (C 8892B) and lavalier (C 8893B) transmitters.

System Features:

• Operates on UHF band frequency range 540-570MHz 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 540-570MHz

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 5K

Ω

 Load

Balanced: max. 1V (0dB=1V) at 5K

Ω

 Load

Receiver Power Supply:

............................................................................................................................

DC 12 Adapter

Transmitter Specifications (transmitters sold separately):

Carrier Frequency Range: 

............................................................................................................

UHF band 540-570MHz

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

Содержание C 8890B

Страница 1: ...REDBACK UHF Band Diversity Wireless Microphone System Operating Instructions REDBACK C 8890B 700 Ch UHF Band Diversity Wireless Mic System 700 CHANNEL UHF BAND TRUE DIVERSITY WIRELESS MICROPHONE SYSTEM ...

Страница 2: ...ic 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...

Страница 3: ... 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 ...

Страница 4: ... three channel selection modes 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 Use the button to select the MANUAL mode so that the MANUAL marker appears on the LCD disp...

Страница 5: ...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...

Страница 6: ...up 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 occurs within the selected pre...

Страница 7: ...tance from the receiver and transmitter should be within one metre 1M SYNC Press and hold the SYNC button on the Handheld Mic Bodypack The SYNC marker will start flashing on the receiver LCD display Keep pressing the SYNC button on the Handheld Mic Bodypack Then press the SYNC button on the receiver at the same time When the SYNC marker disappears from the LCD display and the RF signal shows up it...

Страница 8: ...phone from rolling when placed on furniture 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 Th...

Страница 9: ...XLR connector cable to connect the transmitter 11 Battery Compartment Figure 3 Beltpack Microphone Transmitter C 8893B 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 Co...

Страница 10: ...BACK C 8890B 700 Channel UHF Band Diversity Wireless Mic System Page 10 AMPLIFIER SPEAKER Mic IN Line IN AUDIO MIXER WIRELESS RECEIVER Line OUT 6 35mm Stereo jack Lead Fig 5 Wireless Receiver Connection Via Line In Figure 6 The unit may be 19 rack mounted individually shown in A Or side by side with an additional receiver shown in B A B ...

Страница 11: ...ose to a metal object or there are obstructions between transmitter and receiver Sound Interference 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 Distortion Check the receiver volume level is not set too hig...

Страница 12: ...nna booster In addition to the above for multiple system installations a range of accessories are available to aid cabling and installation These include C 8844 or C8844A Antenna splitter combiner C 8846 or C8846A Antenna divider 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 high...

Страница 13: ...REDBACK C 8890B 700 Channel UHF Band Diversity Wireless Mic System Page13 Continued next page ...

Страница 14: ...Page 14 REDBACK C 8890B 700 Channel UHF Band Diversity Wireless Mic System ...

Страница 15: ...Page 15 REDBACK C 8890B 700 Ch UHF Band Diversity Wireless Mic System ...

Страница 16: ...und nor by use in a way or manner not intended by the supplier For repair or service please contact your PLACE OF PURCHASE It is at manufacturer 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 ...

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