Symmetricom 58502A Manuel d'utilisateur télécharger pdf (Page 24)

Chapter 1 Getting Started

Using Commands to Control Key Functions (Examples)

1-14 User’s Guide

Distributing of the Backup Oscillator (Option 010) Signal

Only

Just apply ac power to the 58502A. After powerup, allow the oscillator

to warm up for 5 minutes before using the signal. You do not have to

send a command. The oscillator will provide the output signals.

Commands That Are Common to All Distribution

Applications

Checking the Output Channels Status

To Use Unpacked Integer to Check Output Channels

Enter OUTP:QUES:UNP?, and press Return.

A string of 12 digits, consisting of 0s and 1s, is returned. The leftmost

digit designates channel 1 and the rightmost digit stands for channel

12. A 0 indicates that the associated output is functional, while a 1

indicates an output fault. For example, the following string indicates

that channels 2 and 7 are not functioning - 0,1,0,0,0,0,1,0,0,0,0,0.

To Use Packed Integer to Check Output Channels

Enter OUTP:QUES:PACK?, and press Return.

An array of Boolean returns. The returned string provides status on

each 10 MHz output in a single packed integer. Each bit is associated

with an output channel. The least significant bit = chan 1, next bit =

chan 2, and so on. If a bit is 0, the output signal is present. Hence, a

value of 0 shows indicates that all outputs are functioning. If there was

no output from channels 2 and 3, the response would be:

6 (1*0 + 2*1 + 4*1 + 8*0 + ... = 6).

To Check the Alarm Status

Enter ALAR?, and press Return.

If 0 is returned, alarm is off. If 1 is returned, alarm is on.

To Check for Serial-Port Errors

Enter SYST:ERR?, and press Return.

An integer and quoted string are returned. The first parameter is the

error number and the quoted string is the error description.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 87 88

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Symmetricom 58502A Manuel d'utilisateur Page 24