Chapter 3 ICS Command Reference
CLK
194 SSU-2000 Technical Reference 12713020-003-2 Revision F.01 – January 2007
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
Options are:
MODE {ACQUIRE|LOCKED|HOLD}
Sets the current PLL operation parameters.
ACQUIRE Forces re-acquisition of the software PLL loop.
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