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1) 0 dBSPL = 2 × 10
-5
Pa
Specifications
Power section
Power requirements 1.5 V DC
(one LR6/size AA alkaline
battery)
Battery life Approx. 5 hours at 25°C or
77°F, with Sony LR6 alkaline
battery
General
Operating temperature 0°C to +50°C (32°F to 122°F)
Storage temperature –30°C to +60°C (–22°F to
+140°F)
Dimensions 51 × 238 mm (diameter/length)
not including antenna
(2-1/8 × 9-3/8 inches)
Mass Approx. 440 g (15.5 oz)
including battery
Supplied accessory
Operating Instructions (1)
Microphone holder (1)
Screw adaptor PF
1
/2 to NS
5
/8 (1)
Design and specifications are subject to change without
notice.
Transmitter and modulator section
Oscillator Crystal controlled PLL
synthesizer
Type of emission F3E
Carrier frequencies
U64 model: 770.125 to 781.875 MHz
(TV channels 64 and 65)
U66 model: 782.125 to 793.875 MHz
(TV channels 66 and 67)
U68 model: 794.125 to 805.875 MHz
(TV channels 68 and 69)
RF power output 10 mW (50-ohm load)
Tone signal 32.768 kHz
Battery condition signal 32.782 kHz
Type of antenna 1/4 -wavelength wire
Audio section
Microphone type uni-directional dynamic
microphone
Pre-emphasis 50 µs
Deviation ±5 kHz (94 dBSPL
1)
, 1 kHz input)
Frequency response 50 to 15,000 Hz
Signal-to-noise ratio 57 dB or more (A-weighted,
modulation frequency 1 kHz,
with ±5 kHz deviation at WRR-
800A/801A)
Audio attenuator 0 to 21 dB, variable in 3-dB
steps
Input level 151 dBSPL
(at audio attenuator 21 dB)