NGT—Overview and specifications
36 NGT Transceiver System Technical Service Manual
Specifications
The figures listed for specifications are normally exceeded by production equipment.
Where relevant, typical values are given in brackets [ ]. All measurements are made at
13.6 V DC, with 50 Ω source and load resistances at 25°C ambient temperature, unless
otherwise specified.
General
Table 1: General specifications
Item Specification
Frequency range Transmit: 1.6 to 30 MHz
Receive: 0.25 to 30 MHz
Channel capacity
(single or two-frequency
simplex channels)
AR, SR, ASR, AR Voice,
SRx:
400
CR: 100
VR:20
Frequency generation All frequencies generated by synthesiser and DDS with 10 Hz resolution
Operating modes Single sideband (J3E) USB or LSB or switched USB/LSB, (AM: H3E
optional)
Frequency stability ±1.5 [1] ppm –30 to +60°C
(–22 to 140°F)
(08-05261)
±0.3 ppm –30 to +60°C
(–22 to 140°F)
(08-05889)
Oven warm up time 1 minute nominal
Programming Frequencies and options are programmed via the RS232 socket on the handset
using NSP programming software and a PC
Channels may be entered from the handset by qualified personnel or (where
authorised) by the user
Transmit/Receive
switching
Using GPIO port on 2010 RF unit: 35 ms
Using GPIO port on 2012 RF unit: 15 ms
RF input/output
impedance
50 Ω nominal
Supply voltage 13.6 V DC nominal, negative earth
Nominal operating
range:
10.8 to 15 V
Functional range: 9 to 16 V (not specified)
Reverse polarity protected
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