Transmitter
|
Item
|
UHF
|
VHF
|
Frequency
|
400-480MHz
|
136-174MHz
|
Channel spacing
|
12.5kHz/25kHz
|
Frequency stability
(-30℃、+60℃、+25℃)
|
+/-0.5ppm
|
Low power
|
1W
|
2W
|
High power
|
4.5W
|
5W
|
Modulation restriction
|
±2.5dB@12.5kHz / ±5.0dB@25kHz
|
FM hum& noise
|
-40dB@12.5kHz / -45dB@25kHz
|
Conducted/radiated emission
|
-36dBm<1GHz / -30dBm>1GHz
|
Adjacent channel selectivity
|
-60dB@12.5kHz / -65dB@25kHz
|
Audio Response
|
+1、-3dB
|
Audio Distortion
|
3%
|
FM modulation
|
12.5kHz :11KOF3E
25kHz :16KOF3E
|
4FSK digital modulation
|
12.5kHz data: 7K60F1D and 7K60FXD
12.5kHz audio: 7K60F1E and 77K60FXE
12.5kHz data and audio: 7K60F1W
|
Digital vocoder
|
AMBE+2TM
|
Digital agreement
|
ETSI-TS102 361-1、-2、-3
|