097-55501-02 Issue 7 – January, 2005 TimeHub 5500 TL1 Reference Guide 99
Keywords
Keyword Description
CCDEL (CC Delay Value)
This keyword sets the delay (in nanoseconds) for a Composite Clock (CC) output. A
negative value for delay causes the CC output to be moved earlier in time and a
positive value delays the output by the amount of time specified.
The delay amount can be set uniquely for groups of 20 output ports. Ports 1 through
20 can have a single value and ports 21 through 40 can have a different value. PG1
and PG2 are part of the AID in the TL1 command and define which group of 20
ports are set.
It is also possible to set the CC delay using the CBCOMP (Cable Compensation)
keyword. CBCOMP provides a method for making the adjustment based on feet of
cable rather than delay time. CBCOMP and CCDEL are interrelated. If the value of
either keyword is changed, a corresponding change occurs in the value for the other
keyword. The keyword format is:
CCDEL=<value>
Command Example:
RTRV-EQPT::OUTA-PG1:SC050:::PARAMETER=CCDEL;
Note: This feature is available in firmware versions 4142B and later.
When CCALIGN=Y, DS1 outputs from the master shelf are also
adjusted in phase at the same rate as any CC outputs.
If any CC output has a non-zero delay set, this amount of delay is not
compensated (see CCDENB (CC Delay), on page 100 and CCDEL
(CC Delay Value), on page 99). The user-selected delay amount is
preserved when CCALIGN is activated. The result is that the CC
output is offset from the input CC by the user-selected delay amount.
Parameter Value Description
<value> –10000 to 10000 Delay in nanoseconds
Note: This keyword applies only if the individual output port delay is
enabled (CCDENB=Y) and if the Output Connector card is a CC type.
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