– Monitoring of computed channel is only available during scanning and will only display the reading from the most
recent sweep.
– Measurement scaling and alarm limits are applied to the selected channel during a Monitor and all alarm data is
stored in the alarm queue (which will be cleared if power fails).
–
For 4-wire resistance measurements, the instrument automatically pairs channel n in Bank 1 with channel n+10
(DAQM900A or DAQM901A) or n+8 (DAQM902A) to provide the source and sense connections.
– The count on a totalizer channel is not reset when it is being monitored (the Monitor ignores the totalizer reset
mode).
– In DMM Digitize mode, no measurements are taken for monitor operations on the single channel configured for
digitizing while the instrument is in the "wait-for-trigger" state with pretrigger count is zero. However if the pre-
trigger count is not zero, there will be monitor data while the instrument is in the "wait-for-trigger" state.
– In DMM Digitize mode, monitor operations on the digital modules (DAQM907A) is not supported.
ROUTe:MONitor:DATA?
Reads the monitor data from the selected channel. It returns the reading only; the units, time, channel, and alarm
information are not returned (the FORMat:READing commands do not apply to monitor readings). If no data is avail-
able for the specified channel, instrument returns 9.91E37 (not a number).
Parameter Typical return
(none) +8.71549423E-05
Query returns reading from the monitor channel:ROUT:MON:DATA?
– If the Monitor mode is not currently enabled, this query returns 9.91E37 (not a number).
– Readings acquired during a Monitor are not stored in reading memory but they are displayed on the front panel;
however, all readings from a scan in progress at the same time are stored in reading memory.
ROUTe:MONitor:DATA:FULL?
Reads the monitor data from the selected channel. It returns all the reading with the units, time, channel, and alarm
information (all the FORMat:READing enabled commands apply to this monitor readings). If no data is available for
the specified channel, the instrument returns 9.91E37 (not a number).
Parameter Typical return
(none) (none)
Query returns full reading from the monitor channel:ROUT:MON:DATA:FULL?
– If the Monitor mode is not currently enabled, this query returns 9.91E37 (not a number).
– Readings acquired during a Monitor are not stored in reading memory but they are displayed on the front panel;
however, all readings from a scan in progress at the same time are stored in reading memory.
Keysight DAQ970A/DAQ973A Programming Guide 211
2 SCPI Programming
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