7. SPECIFICATIONS 
JCY-1900
1950  
DR Service Manual 
 
88 
DOC No. 7ZPNA4409 
 
 
7.6.  NVT-182 Waterproof Microphone Unit 
 
Performance 
a) Mounting  Wall mount type 
b) Device  Electoret condenser microphone 
c) Directivity  Hemisphere indirectivity 
d)  Range of Receive  Radius of 3.5m 
e)  Power supply  Supply from the RCU 
f)  Microphone test  Built-in speaker for self-diagnosis test 
g) Compass safety distance   
 1) Standard  0.1m 
 2) Steering  0.1m 
 
Environmental condition 
a)  Operating temperature  -25 °C to +55 °C (IEC 60945 exposed type) 
b)  Temperature and humidity  +40 °C, 93% (non condensing) 
c)  Vibration  2Hz to 13.2Hz    ±1.0mm 
13.2Hz to 100Hz    0.7G 
d) Protection class  IP56 
 
General specification 
a)  Size  126(w) x 86(d) x 111(h) mm 
b) Mass  0.5kg 
c) Color  N7