NTX403 Series Remote Mount UHF-FM Transceiver
Manual
SM64 Rev. 4.00
Output Signals
Headset Audio
100 mW Nominal, 250 mW max into 600
Ω
AUX Receive Audio
300 mVrms nominal, not tone controlled
RT Installed
Low Output (Ground)
Main SQ Disable Out
Active low output, open collector (20 mA max)
Serial Data Out
RS-422 data to control head
Bi-directional Signals
RF Input / Output
50
Ω
nominal antenna impedance
1.4.2
General Specifications
Frequency Range
403.000 to 511.99375 MHz
RF Impedance
50
Ω
nominal
Modulation FM
Rated System Deviation 2.5 kHz (Narrowband), 5 kHz (Wideband)
Rated Audio Input Level 100 mVrms nominal
Duty Cycle
20% (1 min. TX, 4 min. RX)
Sub-audible Tones
38 standard CTCSS tones and all DCS codes
Remote Interface
RS-422 serial data
Number of channels
128, simplex or semi-duplex
Channel Increments
6.25 / 10 kHz
Scan Rate
10-20 channels/sec. All channels may be in
scan list.
1.4.2.1
Transmitter
RF Output Power
10 W or 1 W
±
1dB
Frequency Stability
±
2.5 ppm
Conducted Spurious
≤
-13 dBm (50
µ
W)
Adjacent Channel Power
≥
54 dBc (Narrowband),
≥
70 dBc (Wideband)
Modulation Limiting
2.5 kHz (Narrowband), 5 kHz (Wideband)
Microphone Impedance
150
Ω
±
20%
AF Characteristic
-6 dB/1/-3 dB pre-emphasis (EIA STD)
Page 1-2
Apr 19, 2005
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
