Symmetricom 58502A Manuel d'utilisateur télécharger pdf (Page 62)

Chapter 4 Command Reference

58502A Command Summary

4-4 User’s Guide

58502A Command Summary

Table 4-1 lists and briefly defines all of the commands that can be used

to operate the 58502A.

Table 4-1. 58502A Command

Summary

Keyword/Syntax Parameters Description

*CLS Clears error queue.

*IDN? returns unquoted

string

Returns identification string.

:ALARm? returns 0 or 1 0 = alarm is off, 1 = alarm is on. Alarm is on when any of the

outputs are not functional. (There may be additional internal

conditions that generate alarm.)

DIAGnostic

Diagnostic Subsystem (USED WITH OPTION 010 ONLY)

:CALibration Node Only

:ROSCillator Node Only

:EFC Node Only

:ABSolute

:ABSolute?

Send:

<EFC value> or

UP or DOWN

returns:

Sets the absolute EFC (electronic frequency control) of the

oscillator. Use UP or DOWN to adjust the EFC by the increment

specified in the STEP command (see next command). For

example, if present EFC value is 1000 and STEP value is 13,

:EFC:ABS:UP will increase EFC value to 1013.

Query.

:STEP <EFC increment

value>

Increments the EFC value by this amount.

:STEP? returns <EFC

increment value>

Query.

INPut

INPUT Subsystem

:A:QUEStionable? returns 0 or 1 Reports if there is a signal present on input A.

0 = signal present

1 = no signal present.

:B:QUEStionable? returns 0 or 1 Reports if there is a signal present on input B.

0 = signal present (not questionable),

1 = no signal present.

:ALARm? 0,0,0 or 1,0,0 or

0,1,0

Reports the alarm status of devices connected to the input pins

(6, 7) of the ALARM/STATUS port.

0, 0,0 = no alarm exists.

1, 0,0 = alarm from input A devices connected to pin 6.

0,1, 0 = alarm from input B devices connected to pin 7.

:SELect A or B Enables either Input A or Input B. Use the query form to see

which input is currently in use. This command also disables

auto-switching.

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 87 88

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Symmetricom 58502A Manuel d'utilisateur Page 62

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