BNC 1105 Universal Counter - Manual (Page 144)

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the sensor function is frequency on channel 1, the returned string will be “FREQ”. If
the sensor function is frequency on channel 2, then the string “FREQ 2” will be
returned.
When the optional channel specification is skipped, the counter will automatically
choose to use the default channel, which is channel 1 for Frequency, Period, Rise/Fall
time, Duty Cycle, Pulse width, Totalize and Voltage Peaks measurements, and
channel 1 to channel2 for Time Interval, Frequency Ratio and Phase measurements.
When the sensor function is Totalize, Voltage Maximum, Voltage Minimum or Voltage
Peaks, use [:INIT]:IMM to initiate a single measurement.
When sensor function is set to Rise Time, the trigger level for channel 1 is set to 10%
and the trigger level for channel 2 is set to 90%. When the sensor function is set to
Fall time, the trigger level for channel 1 is set to 90% and the trigger level for channel
2 is set to 10%. The auto-triggering is enabled in both cases.
When the sensor function is set to Pulse Width or Duty Cycle, the trigger levels for
both channel 1 and channel 2 are set to 50%. The auto-triggering is enabled.
When the sensor function is set to [:][TINTerval[1,2], the input routing is set to
separate ([:SENSe]:EVEN2:FEED “INP2”). Use [:SENS]:EVEN2:FEED “INP1” to
select common-mode Time Interval.
This command doe not affect :FETCh?, READ?, or CONFigure?.
Sets or queries Gate for Phase measurements. For more information about the front
panel gating settings and the interface command parameters, please refer to
the PHASE table in Chapter 5.4.
[:SENSe]:PHASe:ARM[:STARt]:SLOPe POSitive ︱ ︱ ︱ ︱NEGative
Sets or queries the slope of the external start arm signal used in external arming Phase
measurements.
Return
A sequence of ASCII-encoded bytes. POS means Positive and NEG means Negative.
Notes
This will be set to Positive after the counter has been turned off or a remote interface
reset.
This command only applies when the command [:SENS]:PHAS:ARM[:STAR]:SOUR
EXT is used.
[:SENSe]:PHASe:ARM[:STARt]:SOURce IMMediate ︱ ︱ ︱ ︱EXTernallll