Symmetricom SSU-2000 User Manual page 220

Chapter 8 Output Module Reference Data
Japanese Sine Wave Output Module
Provisioning the Signal Type
You use ICS and TL1 software commands to set the signal type for the Output
module. Use the ICS command OUTPUT to view or provision the output frequency.
Use the TL1 command RTRV-PRMTR-OUTSINE to view the output frequency
setting. To provision the output parameters, use the TL1 command
SET-PRMTR-OUTSINE.
Note: For syntax descriptions, refer to the SSU-2000 Technical
Reference.
Output Squelching
The Output module allows you to selectively turn off (squelch) the outputs during
periods of degraded performance. This feature allows you to turn off any of the 20
output ports on the module. The SSU uses the system Priority Quality Level (PQL)
to determine when the system is operating within specified limits; if the outputs
become degraded, the system automatically turns off the assigned ports.
To enable the squelching feature, you must provision a "threshold" PQL value using
the OUTPUT command (for ICS mode) or the SET-PRMTR-OUTSINE command
(for TL1 mode). The syntax for each command is shown below. A threshold PQL
value of zero disables the squelch function. Threshold PQL values above zero
enable the squelch function; when the system PQL is greater than the threshold
PQL, the output is squelched.
For example, you can provision output ports 1 through 5 for a threshold PQL of 3
and you can disable squelching for ports 6 through 20 (PQL is set to 0). In this
example, if the system PQL is 1, 2, or 3, ports 1 through 20 generate outputs. If the
system PQL changes to 4 or higher, outputs on ports 1 through 5 are squelched
(turned off) and ports 6 through 20 continue to generate outputs. The response from
the ICS Output Status command appears as shown in the following example.
SSU_2000->out 1a08
2004-06-04T18:43:33Z ID: SSU2000 Name: SSU_2000
Module Name: J/SW Output Module
OUT STATUS Clk Clk
Loc# Type Sta Sel
---- ----- --- --- -------- ---- --- ----------------------------------------
1A08 J/SW Ok
OUTPUT SETUP
Loc# Type Bypass
---- ----- ------
1A08 J/SW On
Frequency: 6.312MHz
Squelch:
P[ 1]= 2, P[ 2]=
P[ 6]= 0, P[ 7]=
P[11]= 0, P[12]=
P[16]= 0, P[17]=
220 SSU-2000 User's Guide
Stat
A B C D Redt PQL
A / / / / 4
2, P[ 3]= 2, P[ 4]=
0, P[ 8]= 0, P[ 9]=
0, P[13]= 0, P[14]=
0, P[18]= 16, P[19]=
Port Status 1 1 1 1 1 1 1 1 1 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
/ / / / / / / / / / / / / / / / / / / /
2, P[ 5]= 2,
0, P[10]= 0,
0, P[15]= 0,
0, P[20]= 0,
12713020-002-2 Revision F.01 – January 2007