12778474-002-2 Revision F – March 2004
TSG-3800 User’s Guide 211
Output Modules
AMI 20-Output Module
Setting Rocker Switch S1
Before installing the AMI 20-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.
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.
The INSEL switch is used to select either IN1 or IN2 signals. The Frame Generators
produce timing signals for either T1 or E1 at the IN1 inputs of the AMI 20-Output
module, and either E1 or CC at the IN2 inputs. Set INSEL in combination with the
FG settings for the desired output signal.
The CLKSEL switch selects either CLK1 or CLK2 inputs from the Frame Generator.
Set this switch to On if the clocks on the CLK1 inputs are the proper frequency; set
this switch to Off if the clocks on the CLK2 inputs are the proper frequency. For a T1
output, a 1.544 MHz clock must be selected, or for an E1 output, a 2.048 MHz clock
must be selected.
Note:
In most applications, AMI 20-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.
Table 7-3. AMI 20-Output Module Switch S1 Name and Functions
Rocker
Function
LEN2, LEN1, LEN0
Set according to the length of cable connected to the outputs
(for T1 applications). See
Table 7-4
.
For E1 applications, set these three switches to OFF.
TCLKSEL
Sets the frequency expected by the output buffers.
ON = 1.544 MHz, T1 applications
OFF = 2.048 MHz, E1 applications
INSEL
Selects the inputs to be used.
ON = IN1 (A and B),
OFF = IN2 (A and B).
CLKSEL
Selects the clocks to be used.
ON = CLK1 (A and B),
OFF = CLK2 (A and B).
Note:
The LEN0, LEN1 and LEN2 switches control the T1 output
wave shape when TCLKSEL = ON. Refer to
Table 7-4
.
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