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SPECIFICATIONS
RF Carrier Frequency Range
554–584 MHz
Working Range
U1, U2: 152.4 m, minimum, under typical conditions; 487.6 m line of sight
NOTE: Actual working range depends on RF signal absorption, reflection and
interference
Audio Frequency Response
50 to 15,000 Hz, ±2 dB. NOTE: Overall system frequency response depends on the
microphone element
Gain Adjustment Range
U1: 0 to 40 dB
U2: 0 to 26 dB
Modulation
±45 kHz deviation compressor-expander system with pre-and de-emphasis
RF Power Output
U1, U2: 10 mW maximum
Dynamic Range
>110 dB, A-weighted
RF Sensitivity (Typical)
U4S
–110 dBm
12 dB SINAD
–105 dBm
30 dB SINAD
Image Rejection
100 dB typical
Spurious Rejection
75 dB typical
Ultimate Quieting (ref. 45 kHz deviation)
>100 dB, A-weighted
Audio Polarity
Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302
phone plug) produces positive voltage on pin 2 with respect to pin 3 of low
impedance output and the tip of the high impedance
System Distortion (ref. ±45 kHz deviation, 1 kHz modulation)
<0.3% Total Harmonic Distortion typical
Power Requirements
U1, U2: Two (2) 1.5V AA alkaline batteries recommended; Nicad batteries optional
U4: 90 to 230 Vac , 50/60 Hz
Power Consumption:
U4S: 9.6 W min., 13.2 W max.
U4D: 12 W min.,16 W max.
UA845US: 15 W min. per unit typical, 62 W max. when used with 4 UC4's and 4
UA830WB line amplifiers
Battery Life (Typical)
U1, U2: 12 hours (with Duracell MN1500 1.5V AA alkaline battery)
Operating Temperature Range
-7° to 49° C NOTE: Battery characteristics may limit this range
U4D
–107 dBm
12 dB SINAD
–102 dBm
30 dB SINAD
1
/
-inch output
4
2
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