Operating instructions

GENERAL INFORMATION
1-8
Amplitude Modulation – Internal
Frequency range 400 kHz to 1.05 GHz
AM depth range 0 to 99 %
Resolution 1 %
Indication 2 digits
Setting Keyboard entry, delta increment / decrement function
and rotary control
Accuracy
For carrier frequencies from 1.5 MHz to 400 MHz:
±5% at 50 % for mod freq of 1 kHz,
±7% ±1 digit, for mod freq of 1 kHz,
±15% ±1 digit, for mod freq of 50 Hz to 15 kHz
Distortion Less than 2 % at 1 kHz for 30 %, CCITT weighted
Modulation Frequency Range 5 Hz to 33 kHz
Amplitude Modulation – External
Input impedance Nominally 10 kΩ in parallel with 40 pF
Frequency Range As internal AM
Modulation Frequency Range As internal AM
Sensitivity 1.0 V RMS for 0 to 100% AM
Frequency Modulation – Internal
Frequency range 400 kHz to 1.05 GHz
Maximum deviation 75 kHz
Indication 3 digits
Setting Keyboard entry, delta increment / decrement function and rotary
control
Accuracy † ±7% at 1 kHz modulating frequency
±10% at modulating frequencies from 50 Hz to 15 kHz
Distortion Less than 1% at 1 kHz for deviation of 5 kHz, CCITT weighted
Resolution 25 Hz
Pre-emphasis 750 μs selectable
Mod Frequency Range 5 Hz – 33 kHz
Frequency Modulation – External
Input impedance Nominally 10 kΩ in parallel with 40 pF
Frequency Range As internal FM
Modulation Frequency Range DC to 100 kHz
Pre-emphasis 750 μs selectable
Sensitivity 1 V RMS for 0 to 75 kHz deviation
Microphone Input
Input Level 2 mV to 200 mV (AGC levelled)
Input Impedance Nominally 150 Ω
Press To Talk (PTT) When using the optional microphone in Tx Test mode, the PTT will
switch the Service Monitor to Rx Test
† At low modulation levels the residual AM / FM may become significant