Fluke PM6685R MEASure FREQuency?, Frequency, Command Reference, @3 means input C HF-input option

:MEASure :FREQuency?

[￿ [<expected value>[,<resolution>]] [,<(@«1234567»)>]]

PM6680B/81/85

Frequency

Traditional frequency measurements. The counter uses the <expected value> and <resolution> to calculate the Measurement Time (:SENSe:ACQuisition:APER- ture).

Example:

SEND￿ :MEAS:FREQ? ￿ (@3)

READ￿ 1.78112526833E+009

This example measures the frequency at input C.

￿ The channel is expression data and it must be in parentheses ( ).

Parameters:

<expected value> is the expected frequency,

<resolution> is the required resolution.

<(@«134567»)> is the channel to measure on: (@1) means input A1

(@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

@7) means input A with the variable hysteresis mode (Only PM6680B and PM6681)

If you omit the channel, the instrument measures on input A (@1).

1The A input is always prescaled by 2 when measuring Frequency A and prescaled by 1 for all other functions.

Complies to standards: SCPI 1991.0, confirmed.

9-60 Command Reference