Comtech EF Data SDM-100A - Manual (Page 151)

SDM-100A Satellite Modem Maintenance
Rev. 0 5–9
5.3 Module Identification
The modem PCBs each have an assembly number that is marked on the board. The latest
revision is stamped on the board along with the serial number.
EFData tracks the hardware by the assembly number, revision, and serial number.
When replacing a plug-on module, care must be taken to ensure the proper orientation of
the card. Refer to the individual sections on each module for the location of the
configuration identification.
Refer to Table 5-2 for a list of part numbers and descriptions of various modules used in
the modem.
Table 5-2. EFData Part Numbers for Various Modules
Chassis Assembly Base Part #
Dash #
1
2
AS/5182-X
Description
AC, EFD, with Display
DC, EFD, with Display
RF Modulator Part #
Dash #
1
2
3
4
AS/3995-X
Description
50 Ω Modulator
75 Ω Modulator
50 Ω High Power
75 Ω High Power
RF Demodulator Part #
Dash #
1
2
AS/4401-X
Description
50 Ω Demodulator
75 Ω Demodulator
Sequential Decoder IC/EFD 8858
Interface (One per Modem)
RS-422
V.35
RS-232-C
ASYNC
ADPCM
AS/2524
AS/2532 or AS/4326
AS/2533
AS/4089
AS/3916