SG-15~PCM

Overview

The range of frequency is generated in only one band, from 20 to 35000 Hz.
The method of generation is different from other signal generators:
the variable frequency oscillator operates from 100 to 135 Khz, its output is beated with a fixed oscillator of 100 Khz in a mixer
the output of which, filtered and amplified, is the signal at the output connector.
The output is relatively a low distortion one due to the method of generation,
and a high level one with the push-pull final amplifier, two 6V6.

In the model SG-15A for the fixed oscillator is used a xtal oscillator, instead of the LC of the SG-15

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Relationship to Similar Equipment

This equipment, with the signal generator ME-22/PCM, is part of Telephone Test Set TS-140/PCM.

Technical Description

Power Requirements

50 w, 115 or 230 v ±10%, 50 to 70 cy, 1 phase ac

Frequency Range

200 to 35,000 cy

Frequency accuracy

+- 10 cps from 200 to 1000 cps, +-20 cps from 1000 to 2000 cps, +-50 from 2000 to 35000 cps

Impedance

600 ohms

Power output

-45 to +26 dbm +- 0.5 db

Major Unit

SG-15/PMC 19"w 13"d 8 3/4" h; 52 lbs

Carring case

CY-712/PCM 21 1/8"w 16 d 12 1/4 h; 30 lbs

Tubes, Crystals, Transistors

SG-15/PCM 3 - 6J5 1 - 6SL7GT 2 - 6V6GTY 2 - 6SJ7 1 - 6SA7Y 1 - 6SQ7 1 - 0C3/VR105 1 - 6L6GAY 1 - 5Y3GT

SG-15A/PCM 1 - 6SN7 2 - 6J5 1 - 6SL7GT 2 - 6V6GTY 2 - 6SJ7 1 - 6SA7Y 1 - 6SQ7 1 - 0C3/VR105 1 - 6L6GAY 1 - 5Y3GT

Reference Data and Literature

1. TM 11-2096
2. MIL-T-12643