Page 2
Congratulations on purchasing a REDBACK PLL synthesized true diversity wireless microphone system. Altronic Distributors warrants this product for 12 months
from date of purchase from Altronic or its resellers to the consumer. During the warranty period, we undertake to repair or replace your product at no charge if
found to be defective due to a manufacturing fault.
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 (520-550 MHz) with 700 selectable channels (multiples of 25 kHz but never a multiple of 100 kHz). 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 520-550 MHz with PLL synthesized control.
• Auto-scan function to easily find an interference-free channel.
• Pre-set channel groups allow up to 8 transmitters & receivers with the use of the auto-scan 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:
• 12 V 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 if needed.
Receiver Specifications:
Carrier Frequency Range: ...........................................................................................................................................................................UHF band 520-550 MHz
Frequency Stability: ............................................................................................................................................................ ±0.005% with PLL synthesizer control
S/N Ratio:.................................................................................................................................................................................................Over 100 dB, at 60 dB/V
Image and Spurious Rejection: ............................................................................................................................................................................... 80 dB minimum
Receiving Sensitivity: .................................................................................................................................................................2 V over 52 dB/V antenna input
Selectivity: .............................................................................................................................................................................................................................>50 dB
Dynamic Range....................................................................................................................................................................................................................>100 dB
Modulation Mode:...................................................................................................................................................................................................................... FM
IF Frequency: ................................................................................................................................................................................1st : 243.95 MHz; 2nd: 10.7 MHz
Effective Range:........................................................................................................................................................................................100 m in ideal conditions
AF Response: ...............................................................................................................................................................................................80 Hz to 16 kHz (±3 dB)
T.H.D.:..........................................................................................................................................................................................................Less than 1% (at 1 kHz)
Receiver Audio Output: Unbalanced: ......................................................................................................................... max. 775 mV (0 dB=0.775 V) into 5 kLoad
Balanced: .................................................................. max. 1 V (0 dB=1 V) at 5k Load Dimensions: 200 mm W x 42 mm H x 183mm D
Receiver Power Supply: ........................................................................................................................................12 V DC adapter (current consumption 520 mA)
Transmitter Specifications (transmitters sold separately):
Carrier Frequency Range: ...........................................................................................................................................................................UHF band 520-550 MHz
RF Power Output: ...................................................................................................................................................................................................... 10 mW (max.)
Spurious Emissions: ........................................................................................................................................................More than 60 dB below carrier frequency
T.H.D.:..........................................................................................................................................................................................................Less than 1% (at 1 kHz)
Frequency Stability: ...................................................................................................................................................Within ±0.005% with PLL synthesizer control
Maximum Deviation: ................................................................................................................................................................±48k Hz within limiting compressor
Microphone Capsule:........................................................................................................................................................... Unidirectional condenser microphone
Operating Voltage:.......................................................................................................................................................DC 1.5 V x2 AA-size (UM-3) or rechargeable
Current Consumption: ....................................................................................................................................................................Approx 120 mA ± 10 mA (max.)
