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TimeHub 5500 TL1 Reference Manual

175

Keywords

097-55501-02 Issue 5: June 2003

SSSSSSSSSSS SSSS S SSSSS SSSSSSS S SSS S SSSSS S

SELMDE (Selection Mode)

This keyword controls whether the selection of the active timing reference will be

performed automatically by the TimeHub 5500 or directly selected by the user.

Note:

This keyowrd is only available in clock card firmware versions 4236B or

later. Firmware version can be observed in RTRV-NETYPE-ALL response.

The keyword format is:

SELMDE=<value>

Parameter Value Description

<value> AUTO TimeHub will automatically select the qualified input to use

as the active timing reference. The actual choice will

depend on PRIORITY and SYNCMDE (see those keyword

topics for details).

MANUAL When selected, an attempt will be made to use the

requested channel as the active timing reference. The

requested channel is determined by the MANCHAN

setting (see MANCHAN keyword).

If the requested channel is not qualified at the time SELMDE

is set to MANUAL, the SELMDE setting will become AUTO.

Once the MANUAL setting has been accepted, if the

requested channel later becomes disqualified for any

reason, the SELMDE setting will become auto.

FORCED When selected, an attempt will be made to use the

requested channel as the active timing reference. The

requested channel is determined by the MANCHAN

setting (see MANCHAN keyword).

If the requested channel is not qualified at the time SELMDE

is set to FORCED, the clock card will enter holdover mode

(even if there are other qualified inputs). If the requested

channel subsequently becomes qualified, it will become

the active timing reference. The SELMDE setting will remain

FORCED until changed by command.

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