Setting The Trigger Delay; Setting The Number Of Samples; Understanding The Measurement Complete Signal; Accessing And Controlling Memory - Tektronix DMM4040 User Manual

DMM4040/4050
Users Manual

Setting the Trigger Delay

A Meter measurement can be delayed a set amount of time after receiving a trigger. This
feature may be useful when you need to wait for a signal to settle before measuring it.
When a trigger delay is specified, that delay is used for all functions and ranges.
To set a trigger delay:
1. Press L.
2. Press the soft key labeled TRIGGER.
3. Press the soft key labeled SET DELAY.
4. To select a specific digit to adjust, press either <-- or -->.
5. With the desired delay set, press the soft key labeled ENTER.

Setting the Number of Samples

Normally, the Meter takes one measurement (or sample) each time a trigger is received if
in "wait-for-trigger" state. However, you can set the Meter to take a specified number of
measurements for each trigger.
To set the number of samples per trigger:
1. Press L.
2. Press the soft key labeled TRIGGER.
3. Press the soft key labeled #SAMPLES.
4. To select a specific digit to adjust, press either <-- or -->.
5. With the desired delay set, press the soft key labeled ENTER.

Understanding the Measurement Complete Signal

The trigger port on the Meter's back panel provides a low-true pulse at the completion of
each Meter measurement. See the specifications section for more details on this signal.

Accessing and Controlling Memory

The Meter stores readings and meter configuration information using internal and
external memory. The external memory connects through the USB port on the front panel
of the Meter. Optional Memory in various storage capacities is available from Tektronix.
See the "Options and Accessories" section in Chapter 1 for Tektronix part numbers. In
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If the Meter does not receive a trigger for a few seconds, a TRIG annunciator
illuminates indicating the Meter is waiting for a trigger and a lightning bolt appears
indicating the Meter does not know what voltage is applied to the terminals. Each
press of the trigger key W or an active low pulse on the trigger port will initiate a
measurement.
The trigger delay can be set between 0 and 3600 seconds with a resolution of 10
microseconds.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
The number of samples per trigger can be set between 0 and 50000 samples.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.