Configuring The Frame Generator Module - Symmetricom TSG-3800 Series User Manual

CPU, Frame Generator, and Clock Modules
T1/E1 Frame Generator Module with SSM
The E1 timing signals are also created from the 18.528 MHz reference. A phase
locked loop locked to this reference produces a frequency which is divided to 2.048
MHz. This clock is then used to create the framed all ONEs timing signal on
balanced TTL level.
When two Frame Generator modules are installed, the TSG-3800 aligns the frames
of their output signals. This allows synchronization of the frame marker and output
timing signals to each other for minimal phase hits and no change of frame
alignment. Synchronization is accomplished automatically when the second Frame
Generator is installed.
Power A and B on the main shelf provide power to the module. These redundant
sources of –48 vDC are diode-coupled and fused, allowing the module to draw
power from either source. The internal fuse labeled F1 protects the circuitry from
excessive current. The DC-to-DC Converter changes the negative voltage into +5
vDC; the green POWER indicator on the front panel is lit when either power source
is available to the module. The POWER indicator turns off when power is lost, for
example if the fuse on the module opens, if both –48 vDC power inputs are lost, or if
the converter fails.

Configuring the Frame Generator Module

The T1/E1 Frame Generator module with SSM can be customized for different
TSG-3800 configurations by setting several rocker switches and two jumpers, as
shown in Figure
TSG-3800, these switches must be set for the Output modules installed in the main
shelf.
Caution: To prevent ESD damage to the module, always observe
the precautions described in
page 61.
Note: You must set the rocker switches and jumpers before you
install the Frame Generator module in the TSG-3800.
Caution: When two Frame Generator modules are installed in the
main shelf, the switches and jumpers on both Frame Generators
must be set the same. The module does not support a mix of input
signals and it is limited to two framed signals and/or one unframed
signal.
Caution: Jumpers W2 and W5 are reserved for factory use only.
For proper module operation, both jumpers must always be
installed between pins A and B.
188 TSG-3800 User's Guide
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6-8. Before installing the Frame Generator module in the
Properly Handling the Modules, on
12778474-002-2 Revision F – March 2004