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REDBACK® C 8890D 700 Channel UHF Band Diversity Wireless Mic System
REDBACK® C 8890D 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 (520-550MHz) with 700 selectable channels. Please read this instruction
manual completely before operating the system. These instructions cover the transmitters, and receiver model C 8890D. The
receiver unit is used with compatible 700 channel handheld (C 8892D) and lavalier (C 8893D) transmitters.
System Features:
• Operates on UHF band frequency range 520-550MHz 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)
• Half 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 520-550MHz
Frequency Stability: ................................................................................................ ±0.005% with PLL synthesized controlled
S/N Ratio: ...................................................................................................................................... Over 100dB, at 60dB/μV
Image and Spurious Rejection: ...................................................................................................................... 80 dB minimum
Receiving Sensitivity: .......................................................................................................... 2uV over 52dB/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
Dimensions: ......................................................................................................................................200W x 42H x 183Dmm
Receiver Power Supply: .................................................................................. 12V DC Adapter (current consumption 520mA)
Transmitter Specifications (transmitters sold separately):
Carrier Frequency Range: .................................................................................................................. UHF band 520-550MHz
RF Power Output: .............................................................................................................................................. 10mW (max.)
Spurious Emission: .................................................................................................. More than 60dB below carrier frequency
T.H.D.: ................................................................................................................................................Less than 1% (at 1kHz)
Frequency Stability: ...................................................................................... Within ±0.005% with PLL synthesized 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.)
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