NGT—Overview and specifications
NGT Transceiver System Technical Service Manual 39
Transmitter
A/F response
@ GPIO connector
Typical: –6 dB 300 to 2800 Hz
A/F response
@ loudspeaker
Typical: –6 dB 300 to 2500 Hz
A/F power and A/F
distortion
2.4 W into 8 Ω, 5% THD
4 W into 4 Ω, 5% THD
6 W into 2 Ω, 5% THD
Clarifier ±10 ppm (nominal)
±50 Hz below 5 MHz, increasing to ±300 Hz at 30 MHz
Clarifier is automatically reset to mid-frequency with channel change
Inband IMD Better than 25 dB IMD with two 100 mV PD RF inputs
Signal to noise vs input
signal
An increase of input level of 40 dB above the sensitivity level increases the
signal to noise ratio to at least 40 dB
Table 3: Transmitter specifications
Item Specification
Power output for AUST
& FCC
100 W PEP ±0.5 dB, 27 MHz CB 10 W PEP (Aust only)
Power output 125 W PEP reducing with frequency to 100 W PEP at 30 MHz ±1dB
CW or single tone: approximately 60% of PEP with average PEP control
(average control disabled on handset PTT)
Duty cycle 100%: normal speech over full temperature range
100%: ARQ up to 30°C (86°F)
25%: 16-tone continuous data mode (5 minutes on maximum) at
ambient temperature up to 30°C (86°F)
100%: all modes up to maximum ambient of 45°C (113°F) with Option F
Supply current Output power: 100 W or 125 W
Two-tone or CW: 9 to 17 A
Average speech: 8 A for battery life calculations
Protection Safe under all load conditions by limiting reflected power to 10 W PEP and
limiting PA transistor collector voltage swing
Thermal protection against excessive heatsink temperature
Table 2: Receiver specifications (cont.)
Item Specification
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