For example, :MEASure:SOURce CHANnel2 /*Set parameter measurement source to CH2*/ :MEASure:SOURce? /*Query returns CHAN2*/ :MEASure:COUNter: SOURce For example, :MEASure:COUNter: SOURce CHANnel2 /*Set the frequency meter measurement source to CH2*/ :MEASure:COUNter: SOURce? /*Query returns CHAN2*/ :MEASure:COUNter: VALue? For example, :MEASure:COUNter:VALue? /*The query returns 1.000004e + 03*/ :MEASure:CLEar 44 / 136 Discrete {D10|D11|D12|D13|D20|D21|D22|D 23|D30| D31|D32|D33|D40|D41|D42|D43| CHANnel1|CHANnel2|CHANnel3|CHA Nnel4|MATH} CHANnel1 Description Only the channels that are currently open are selectable.
Return format The query returns D10, D11, D12, D13, D20, D21, D22, D23, D30, D31, D32, D33, D40, D41, D42, D43, CHAN1, CHAN2, CHAN3, CHAN4, or MATH. Command format :MEASure:COUNter:SOURce :MEASure:COUNter:SOURce? Function description Set or query the frequency meter's measurement source, or turn off the frequency meter function. Parameter Name Type Range Default Discrete { CHANnel1|CHANnel2|CHANnel3|CHAN nel4|OFF} OFF Description ▷For analog channels CH1 to CH4, it is selectable whether or not the channel is currently turned on. Note: When any channel from D0 to D7 is opened, CH4 is not selectable; when any channel from D8 to D15 is opened, CH3 is not selectable.
▷For digital channels D0 to D15, only the channels that are currently turned on are selectable. Return format The query returns D0、D1、D2、D3、D4、D5、D6、D7、D8、D9、D10、D11、 D12、D13、D14、D15、CHAN1、CHAN2、CHAN3、CHAN4 or OFF。 Command format :MEASure:COUNter:VALue? Function description Query the measurement result of the frequency meter. The default unit is Hz. Return format The query returns the current measurement value in scientific notation. If the frequency counter function is not currently turned on, 0.0000000e + 00 is returned. Command format :MEASure:CLEar