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TimeHub 5500 TL1 Reference Manual
Performance Monitoring
097-55501-02 Issue 5: June 2003
SSSSSSSSSSS SSSS S SSSSS SSSSSSS S SSS S SSSSS S
4
Fractional Frequency Offset (cont’d)
Table E lists FFOFF measurements and the measurement time period for an input
port.
Command Example:
RTRV-PM::CLK-4:SC1::FFOFF;
The response to the command in this example displays FFOFF information about
input port 4.
Response Example:
SYMMBITS 00-06-15 12:07:38
M SC1 COMPLD
"CLK1-4:FFOFF-3S,2.000000,COMPL"
"CLK1-4:FFOFF-12S,2.000000,COMPL"
"CLK1-4:FFOFF-48S,2.000000,COMPL"
"CLK1-4:FFOFF-192S,2.000000,COMPL"
"CLK1-4:FFOFF-768S,NA,NA"
"CLK1-4:FFOFF-3072S,NA,NA"
;
The response in this example shows FFOFF values calculated for averaging times
of 3 seconds, 12 seconds, 48 seconds, and 192 seconds for input port 4 of clock
card 1. The values for averaging times of 768 seconds and 3072 seconds are not
yet available, but will become available as the system collects data.
Table E. FFOFF Measurements and Time Periods for Single Input Port
Measurement
Averaging Time
First Data
Available After Updated Every
Includes Data
from Last
FFOFF-3S 3 s 1 s 3 s
FFOFF-12S 12 s 4 s 12 s
FFOFF-48S 48 s 16 s 48 s
FFOFF-192S 192 s 64 s 192 s
FFOFF-768S 768 s 256 s 768 s
FFOFF-
3072S 3072 s 1024 s 3072 s
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