The COMTEST SYSTEMS, Inc. Model 3100 is a compact, microprocessor
controlled Service Monitor for testing FM, AM, and SSB transceivers.
Its microprocessor provides it with extreme versatility and
user friendliness. Its low weight and optional D.C. powered
version permit convenient field use, from either internal
battery or external 12 VDC sources.
The Model 3100 will generate and receive from 400 KHz to
1000 MHz in 100 Hz steps, but with a usable range from 100 KHz.
Internal modulation sources provide a variety of choices
covering most industry standard coded squelch formats. The
generator output is continuously variable from 0.03 uVRMS
to 316 mVRMS.
An internal CRT display shows modulation waveforms or a
spectrum analyzer display, and may also be used as an
oscilloscope. A meter reads Modulation, A.C. RMS volts,
SINAD, or R.F. power.
In receive mode, the LCD display shows carrier frequency
error, modulation frequency and decoded sub tones or
digital coded squelch.