Agilent Technologies 53220A, Руководство пользователя

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102 53220A/53230A User’s Guide
3 53220A/53230A Measurements
Positive and Negative Duty Cycle Measurement Examples
// using MEASure? - measure the positive duty cycle at a
// 50% (0V) reference
*RST
// reset to start from known state
MEAS:PDUT? 50, (@1)
// using CONFigure - measure the positive duty cycle at a
// -1.0V reference
*RST
// reset to start from known state
CONF:PDUT -1.0V, (@1)
INP:COUP DC // set DC coupling
INP:IMP 50 // set input impedance to 50 ohm
READ?
---------------------------------------------------------
// using CONFigure - measure the negative duty cycle at a
// 50% (0V) reference
*RST
// reset to start from known state
CONF:NDUT 50 PCT, (@1)
TRIG:SOUR EXT // set an external trigger source
INIT
Notes
1. The reference (threshold) can be specified as a percentage of the
peak-to-peak amplitude or as an absolute level in either the
CONFigure
or
MEASure?
command.
2. Absolute references are relative to the amplitude of the signal and must take
into consideration the counter’s input coupling and impedance settings.
3. The measured duty cycle is a decimal representation of the ratio. For exam-
ple, a 5% duty cycle reading might appear in the counter output buffer as:
+5.105095730909666E-002
The same reading would appear in the display as:
5.1 Pct
.