Agilent Technologies 53220A, Руководство пользователя

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53220A/53230A User’s Guide 137
53220A/53230A Input Signal Conditioning 4
The detector threshold and, therefore, the ‘on’ portion of the pulse width must
be considered when making burst measurements such as positive (on) width
and negative (off) width. This threshold is set with the command:
INPut3:BURSt:LEVel {<dB>|MINimum|MAXimum|DEFault}
INPut3:BURSt:LEVel? [{MINimum|MAXimum|DEFault}]
(query form)
The
dB
levels are -6 and -12, and are nominal (i.e. non-specified) values.
CONFigure
and
MEASure
do not change the detector threshold setting. Fol-
lowing a reset (
*RST
) or front panel preset (
Preset
), the threshold is set to
-6 dB .
This command and burst measurement capability are only available on the
53230A counter with channel 3 Option 106 or 115 (6 GHz or 15 GHz micro-
wave input) and Pulse Microwave Measurement Option 150 .
Detector Threshold Example
//configure a positive (on) width measurement on channel 3
CONFigure:PWIDth:BURSt (@3)
INP3:BURS:LEV -12 // set -12 dB detector threshold
Noise Rejection (Hysteresis)