Fluke PM6681R, PM6685 MEASure FREQuency RATio?, MEASure FALL TIME?, Fall-time, Frequency Ratio

	:MEASure :FALL :TIME?
PM6680B PM6681
[￿ [<lower threshold> [,<upper threshold>[,<expected value>[,<resolution>]]]] [,(@1)]]

Fall-time

The transition time from 90% to 10% of the signal amplitude is measured.

The measurement is always a single measurement and the Auto-trigger is always on, setting the trigger levels to 90% and 10 % of the amplitude. If you need an av- erage transition time measurement, or other trigger levels, use the :SENSe sub- system and manually set trigger levels instead.

Parameters:

<lower threshold>, <upper threshold>, <expected value> and <resolution are all ignored by the counter

<(@1)> is the channel to measure on, i.e., input A

Complies to standards: SCPI 1991.0, confirmed.

	:MEASure :FREQuency :RATio?
PM6680B/81/85
[￿ [<expected value> [,<resolution>]][,<(@«123456»)>,<(@«123456»)>]]

Frequency Ratio

Frequency ratio measurements between two inputs.

Example:

SEND￿ :MEAS:FREQ:RAT? ￿ (@1),(@3)

READ￿ 2.345625764333E+000

This example measures the ratio between input A and input C. ￿ The channel is expression data and it must be in parentheses ( ). Parameters: <expected value> and <resolution> are ignored

<(@«123456»)>,<(@«123456»)> is the channels to measure on: (@1) means input A

(@2) means input B (Only PM6680B and PM6681)

(@3) means input C (HF-input option)

(@4) means input E (Rear panel arming input)

(@5) means input A prescaled by 2

(@6) means the internal reference

If you omit the channel, the instrument measures between input A and input E.

Complies to standards: SCPI 1991.0, confirmed.

Command Reference 9-63