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Wireless Microphones
WRT-847B/67
UHF Synthesized Transmitter Unit
Features
Supplied Accessories
Microphone holder (1)
Stand adaptor (PF1/2 to NS5/8 type) (1)
Soft case (1)
Channel color seal (1)
Optional Accessories
CU-F780 Capsule Unit
CU-G780 Capsule Unit
CU-E700 Capsule Unit
CU-E672 Capsule Unit
CU-F117 Capsule Unit
Specifications
Oscillator:
Crystal controlled PLL synthesizer
Type of emission:
110KF3E
Carrier frequencies:
838 MHz to 862 MHz
RF power output:
10 mW/50 mW selectable (50 Ω load)
Type of antenna:
1/4 wave length whip antenna
Pre-emphasis:
50 µs
Reference deviation:
5 kHz (94 dB SPL*, 1kHz)
Frequency response:
50 Hz to 18 kHz (typical)
Signal to noise ratio:
60 dB or more (A-weighted, at reference
deviation)
Audio gain control:
-12 dB to 9 dB (in 3 dB steps)
Max. input sound pressure level:
142 dB SPL* (with
CU-F780/G780/E700/F117 at audio gain
-12 dB)
120 dB SPL* (with CU-E672)
Power requirements:
DC 3.0 V (two LR6 AA-size alkaline
batteries)
Battery life:
Approx. 8 hours at 25°C (77°F) with Sony
AA-size (LR6) alkaline batteries, at 10 mW
RF output
Dimensions (diameter x length):
37 x 150 mm (1 1 /2 x 6 inches)
Mass:
Approx. 190 g (6.7 oz) including batteries
* 0 dB SPL = 2E-5 Pa.
413
Wireless Microphones
*A choice of five optional microphone capsules, each with
specific characteristics to suit a range of different
applications. (One capsule is required for the WRT-847B
for function.) *Switchable audio compander time
constant to suit different capsules *Selectable RF output
level: 10 mW or 50 mW *Audio gain and attenuation
settings within the range of +9 dB to -12 dB in 3 dB steps
*Operates over a 24 MHz frequency band within the
range of 838 MHz to 862 MHz (TV channels 67 and 69)
*Lockable external power switch (ON/OFF)
*Easy-to-read LCD with back light indicates operating
conditions such as channel number/frequency, audio input
level, compander time constant, battery status and
accumulated battery operating time *Eight hours of
continuous operation with two AA-size (LR6) alkaline
batteries *Transmits a low battery warning to most Sony
receivers