12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 323
Interactive Command Set
CLK
Use this command to view the clock status and access the clock operating
parameters.
Level 0 Not applicable
Level 1
CLK [xAy]
If you do not specify a parameter, the status for both CLOCK A and
CLOCK B in the unit displays. If you specify a particular clock
address, the clock status and setup information for that clock
displays.
Concise status information: Status (Fail/ Disable/ Selected/ OK),
Software Phase Locked Loop Mode, Current Tau, PQL Value, Freq
Offset, Sigma.
Detailed status information: Same as concise status information,
with the addition of Current Max Tau.
Concise setup information: Minimum tau, maximum tau, Clk Freq,
clock switching method (such as, AutoReturn or Not), input
switching method (AutoReturn On, AutoSwitch On, or AutoSwitch
Off), input selection mode (Priority or PQL), and Local Oscillator
output is On or Off.
Detailed setup information: Same as concise setup information,
with the following additions: Freq.Offset limit, warm-up time,
minimum tau limit, and maximum tau limit. The alarm level and
delay time are handled by the ALARM command. The alarm
elevation time is handled by the ELEVTIME command.
Example:
SSU_2000->clk
2003-05-24T18:24:21Z ID: SSU2000 Name: SSU_2000
CLOCK STATUS
Loc# Status Mode Tau Pql Freq off Sigma
---- ------ ---- ----- --- --------- ---------
1A01 Sel LOCK 3330 5 9.22E-11 2.49E-10
1A12 Ok LOCK 333 5 -7.55E-09 2.75E-10
Level 2 Same as Level 1 operation, with the following additions:
CLK xAy MODE {ACQUIRE|LOCKED|HOLD}
CLK xAy SELECT
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