8: TSP command reference Model DMM7510 7½ Digit Graphical Sampling Multimeter
8-120 DMM7510-901-01 Rev. B / May 2015
dmm.measure.analogtrigger.highfreqreject
This attribute enables or disables high frequency rejection on analog trigger events.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
dmm.ON
Usage
setting = dmm.measure.analogtrigger.highfreqreject
dmm.measure.analogtrigger.highfreqreject = setting
0 µs:
Functions
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_DIGITIZE_VOLTAGE
Details
False triggering around the set analog trigger level may occur with low frequency signals that are
noisy, DC, or have low amplitude and slew rate during the peaks of input sine waves less than
250 Hz. High frequency rejection avoids the false triggers by the requiring the trigger event to be
sustained for at least 64 μs. This behavior is similar to a low pass filter effect with a 4 kHz 3 dB
bandwidth.
When high frequency rejection is on, 64 μs of additional trigger latency is incurred. You may also
need to adjust the trigger levels to ensure that the trigger condition is satisfied for at least 64 μs.
Example
dmm.measure.func = dmm.FUNC_DC_VOLTAGE
dmm.measure.analogtrigger.highfreqreject = dmm.ON
Set the measure function to DC voltage
and turn high frequency rejection for the
analog trigger to on.
Also see
Analog triggering overview (on page 3-64)
dmm.digitize.analogtrigger.highfreqreject (on page 8-73)
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