Installing The G.703/9 Input Module; Enabling Crc Checking; Selecting The Impedance; Enabling The Amplifier - Symmetricom TSG-3800 Series User Manual

Input Modules
G.703/9 Input Module

Enabling CRC Checking

You can configure the G.703/9 Input module to enable CRC checking when CAS is
also enabled. To configure CRC checking, set the jumper on TB2 as shown in
5-8.
Table 5-8. Enabling CRC Checking
CRC
Enabled
Disabled
Selecting the Input Impedance
You can terminate the G.703/9 input line with 75 Ω, 120 Ω, or 3.3 kΩ (bridging). To
select the impedance, set the jumper on TB4 as shown in
Table 5-9. Selecting the Impedance
Input Impedance
120 Ω
75 Ω
3.3 kΩ (bridging)
Connecting to a Monitor Point
You can set the G.703/9 Input module for connection to a G.703/9 monitor point. To
connect the input signal to a 15 dB gain amplifier, set the jumper on TB1 as shown
in Table 5-10.
Table 5-10. Enabling the Amplifier
Amplifier
Disabled
Enabled

Installing the G.703/9 Input Module

The G.703/9 Input module can be installed in slots 1 through 4 of the TSG-3800
main shelf. The slot determines the priority level of the input signal; see
Location and Keyed
148 TSG-3800 User's Guide
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TB2 Jumper Position
A to B
B to C
TB4 Jumper Position
A to B
B to C
Remove jumper
TB1 Jumper Position
A to B
B to C
Modules, on page 61.
Table 5-9.
Slot
12778474-002-2 Revision F – March 2004
Table