T1 Line Length Selections - Symmetricom TSG-3800 Series User Manual

Output Modules
ESF/D4 10-Output Module
Setting Rocker Switch S1
Before installing the ESF/D4 10-Output module in the TSG, you must set Rocker
Switch S1 appropriately. The configuration of these switches must be done
carefully, taking into account the type of outputs required.
Note: In most applications, ESF/D4 10-Output modules are used in
pairs. If this is true in your application, be sure that the rocker
switches are set identically on both modules.
The rocker switches that are part of S1 have the names and functions shown in
Table 7-3. A switch is OFF when the left side of the rocker is pressed down. A switch
is ON when the right side of the rocker is pressed down.
Table 7-13. T1 Line Length Selections
LEN2 LEN1
ON OFF
OFF ON
OFF ON
OFF OFF
OFF OFF
Set these three switches for your application. Remember, the settings apply to all 20
outputs of the module. This means the same length and type of cable must be used
on all outputs for the pulse shapes to be correct. If the cable length is not known, the
switches can be changed while monitoring the wave shape until a suitable wave
shape is obtained. This may also be a useful method for setting the switches when
different types of cables are used.
There are four types of Frame Generators available for the TSG that are compatible
with the ESF/D4 Output module. The following paragraphs discuss each of these
Frame Generators and the proper settings for the rocker switches on the ESF/D4
Output module. Locate the item number for the Frame Generator installed in the
TSG, then locate that number in the following paragraphs.
226 TSG-3800 User's Guide
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LEN0 Option Selected
OFF 0-133 feet (0 - 40 m)
ON 133-266 feet (40 - 80 m)
OFF 266-399 feet (80 - 120 m)
ON 399-533 feet (120 - 160 m)
OFF 533-655 feet (160 - 197 m)
12778474-002-2 Revision F – March 2004