Comtech EF Data SNM-1010L - Manual (Page 38)

SNM-1010L Data/Control Modem Revision 0
Installation MN/SNM1010L.OM
2.3 Rear Panel Connections
The rear panel connectors provide all necessary external connections between the modem
and other equipment. Figure 2-2 provides a layout of the SNM-1010L rear panel, and
Table 2-1 lists these connectors.
RX/IF INPUT
CP1 CP2
TX/IF OUTPUT J6
USER
PORT J9
REMOTE
EIA-449
FAULT ALARMS
J7 J10
EX REF
CP3
AUX 1
Figure 2-2. SNM-1010L Rear Panel
Table 2-1. Rear Panel Connectors
Connection REF DES Description
REMOTE J6 Not currently used.
FAULT J7 The FAULT connector, provides Form C contact closures for fault reporting.
AUXILIARY 1 J9 The AUX 1 connector, provides MOD and DEMOD (TTL) faults, satellite clock,
satellite I&Q, and Automatic Gain Control (AGC) output voltage.
ALARM
J10 Not currently used.
The ALARM connector, provides FORM C contact closures for the purpose of
fault reporting.
DATA INTERFACE - The DATA INTERFACE provides a DCE connection when the modem is used to
carry data. Option EIA-449, V.35, EIA-530
USER PORT - The USER PORT allows a remote site user to request set up of a data call. It also is
used for DAC software upgrades.
TX IF OUTPUT
CP1 The TX IF OUTPUT is a Type N connector that provides a connection for the
transmit IF signal.
RX IF INPUT
CP2 The RX IF INPUT is a Type F connector that provides a connection for the receive
IF signal.
EX REF CP3 The EX REF is a BNC connector for an external reference. The input impedance
is 75
Ω
AC POWER - The AC POWER accepts input power for the SNM-1010L. (± 48 VDC optional)
GROUND CONNECTOR - The GROUND CONNECTOR (GRN), provides a common chassis ground
connection among all of the equipment, via a #10-32 stud.
Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for
DATA I/O. These cables must be double-shielded from end-to-end, ensuring a continuous ground shield.
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