Configuring The Three-Port Input Module - Symmetricom TSG-3800 Series User Manual

Configuring the Three-Port Input Module

Caution: To prevent ESD damage to the module, always observe
the precautions described in
page 61.
There is one setting for each port that must be set appropriately before the module
is installed. This controls the amplification of the input signal for use with monitor
inputs. There are two variations of this depending on the module revision level.
Earlier version modules include a daughter card installed on the module containing
two transformers and a jumper for each port. The jumper will be installed in the
lower position, and the transformers installed in the upper position for normal input
signal operation. To use the port with monitor level (–20 dB) signals, move the
jumper for that port to the upper position, and both transformers for that port to the
lower position.
For revision D and later modules, the daughter board is not present, and monitor
signal operation is selected by moving the appropriate port jumper from pins 1-2 to
2-3 position. This sets the amplifier for a gain of approximately 20 dB. If the signal is
not from a monitor port, or is any clock signal, then the amplification is not used. The
jumpers are W11-port 1, W10-port 2, and W9-port 3. Pin 1 of the jumper is the top
pin of the 3-pin header when the module is viewed from the component side, with
the module panel at the top and the circuit board edge connector at the bottom.
Default Settings
The user can modify operation of this module through the use of one of the
TSG-3800 communications ports using the INP command as described in
Command, on page 350. The Factory Default settings for all ports on the DS1 Input
version, unless otherwise specified, are:
Type: ESF
Format: B8ZS
Impedance: 100 Ω
SSM: OFF
The Factory Default setting for all ports on the E1 Input version, unless otherwise
specified, are:
Type: G.703/6
Format: CAS, CRC4 enabled, HDB3
Impedance: 120 Ω
SSM: OFF
12778474-002-2 Revision F – March 2004
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Properly Handling the Modules, on
Input Modules
Three-Port Input Module
Input
TSG-3800 User's Guide 165