TM 11-665-168-12
Table 2-1. Plug-In Assembly Reference Designation
Reference
Major Component
Assembly
Designation
Signal Generator SG-860/GGM-15 (V) ...........................
Bit distributor and power supply ..........................................................
1A2A1
High level input and output circuits......................................................
1A2A2
Low level input and output circuits.......................................................
1A2A3
Distortion circuits ................................................................................
1A2A4
5 level expandable matrix (48 characters ............................................
1A2A5
Extender assembly (optional 8 level matrix).........................................
1A2A6
5 level matrix (80 characters) ..............................................................
1A2A7
Character counter ...............................................................................
1A2A8
Bit timer...............................................................................................
1A2A9
Distortion gate generator .....................................................................
1A2A10
Oscillator and time-base......................................................................
1A2A11
Signal Distortion Analyzer TS-2862/GGM-15(V)
Error counter and oscillator alarm circuits ...........................................
2A2A1
Error code generator ...........................................................................
2A2A2
Transfer control and bit counter ..........................................................
2A2A3
Peak detector ......................................................................................
2A2A4
Units tens decades .............................................................................
2A2A5
Input circuits........................................................................................
2A2A6
Oscillator and timebase.......................................................................
2A2A7
Extender assembly..............................................................................
2A2A8
Oscilloscope OS-206/GGM-15 (V) .................................
Low voltage power supplies.................................................................
3A3A1
Low voltage regulators.........................................................................
3A3A2
Z markers and D/A converters ............................................................
3A3A3
Time-Base/sweep generator ...............................................................
3A3A4
Calibration and attentuation circuits ....................................................
3A3A5
D/A ladder driver .................................................................................
3A3A6
Horizobntal and vertical amplifiers.......................................................
3A3A7
Extender assembly..............................................................................
3A3A8
2-5. Shelter Requirements
Shelter requirements for the AN/GGM-15 (V) are the same as for other indoor exchange equipment. Protection
must be provided from moisture, dirt, dust, shock, and extreme temperatures.
2-6. Tools and Test Equipment Required for Installation
Only common, nonpowered handtools are required for the installation of the test set in either AN/GGM-15 (V) 1
or AN/GGM-15 (V) 2 configurations.
2-7. Installation
Installation procedures for the test set depend upon the configuration supplied. When the test set is supplied in
the AN/GGM-15(V) 2 configuration, the major components are mounted in the test set case in the same
manner as the AN/GGM-15(V) 1, in a standard 19-inch rack. The interface cable connections are the same in
either configuration.
a. Transformer Strapping. The three major components of the test set may be strapped for either 115 or
230 volt ac operation at 47 to 63 Hz. When shipped from the factory these components are strapped for
operation at 115 volts ac 115 volts. If required to operate at 230 volts ac 23 volts the following procedure
must be performed:
(1) Remove the top cover from each of the major components exposing the power transformers. The
transformers are located at the rear of each chassis and the terminals are clearly marked.
(2) Compare the wiring of the transformer with the wiring illustrated in figure 2-7.
(3) Change the transformer wiring to agree with the 230-volt ac hookup.
b. Rack Installation. The test set occupies only 17.5 inches of rack space. Mounting hardware is not
supplied. Four rack screws are required to mount each major component. The arrangement and dimensions
used for rack-mounting are illustrated in figure 2-8. If necessary, drill holes as required for mounting, and
perform the following steps:
(1) Position the generator in the rack or cabinet, to be the lowest unit of the group. Secure the unit in
the rack or cabinet with screws.
2-6
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