Chapter 5 Remote Interface Reference

Single-Channel Monitoring Overview

Single-Channel Monitoring Overview

In the Monitor function, the instrument takes readings as often as it can on a single channel, even during a scan. This feature is useful for trouble- shooting your system before a test or for watching an important signal.

Any channel that can be “read” by the instrument can be monitored. This includes any combination of temperature, voltage, resistance, current, frequency, or period measurements on multiplexer channels. You can also monitor a digital input port or the totalizer count on the

multifunction module. Monitoring allowed with the actuator module, the matrix module, or the RF multiplexer modules.

The Monitor function is equivalent to making continuous measurements on a single channel with an infinite scan count.

Only one channel can be monitored at a time but you can change the channel being monitored at any time.

Readings acquired during a Monitor vz

stored in memory but

 

 

they are displayed on the front panel (however, all readings from a

 

 

scan in progress at the same time are stored in memory).

5

A scan in progress always has priority over the Monitor function.

 

The instrument will take v v

one monitor reading per scan sweep

 

and will take more as time permits.

You can monitor a multiplexer channel only if the internal DMM is installed and enabled (see “Internal DMM Disable” on page 145). The channel must also be configured to be part of the scan list.

You can monitor a digital input channel or totalizer channel even if the channel is not part of the scan list (the internal DMM is not required either). The count on a totalizer channel is not reset when it is being monitored (the Monitor ignores the totalizer reset mode).

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Image 235
HP 34970A manual Single-Channel Monitoring Overview