2
SPECIFICATIONS
RF Carrier Frequency Range
800–820 MHz
Working Range
U1, U2: 152.4 m, minimum, under typical conditions; 487.6 m line of sight
U1H: 275 m, minimum, under typical conditions; 975 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, U1H: 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
U1H: 50 mW maximum
Dynamic Range
>102 dB, A-weighted
RF Sensitivity
U4S
U4D
–110 dBm
12 dB SINAD
–107 dBm
12 dB SINAD
–105 dBm
30 dB SINAD
–102 dBm
30 dB SINAD
Image Rejection
90 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
1
/
4
-inch output
System Distortion (ref.
±
45 kHz deviation, 1 kHz modulation)
0.3% Total Harmonic Distortion typical
Power Requirements
U1, U1H, U2: 1.5V AA alkaline battery (Duracell MN1500 recommended); Nicad
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.
UA840: 15 W min., 16 W max.
Battery Life (Typical)
U1, U2: 12 hours (with Duracell MN1500 1.5V AA alkaline battery)
U1H: 6 hours (with Duracell MN1500 1.5V AA alkaline battery)
