
18-23
Measure Commands
FALLtime
FALLtime
Command
:MEASure:FALLtime [<source>]
Measures the time at the upper threshold of the falling edge, measures the time at the lower
threshold of the falling edge, then calculates the fall time. Sources are specified with the
MEASure:SOURce command or with the optional parameter following the FALLtime com-
mand. The first displayed falling edge is used for the fall-time measurement. Therefore, for
best measurement accuracy, set the sweep speed as fast as possible while leaving the falling
edge of the waveform on the display.
Fall time = time at lower threshold point – time at upper threshold point.
<source> is {CHANnel<N> | FUNCtion<N> | RESPonse<N> | WMEMory<N> | CGRade} where
CHANnel<N>, FUNCtion<N>, RESPonse<N> and WMEMory<N> apply in Oscilloscope and
TDR modes only, and CGRade in Eye mode only. <N> for channels, functions, TDR responses
and waveform memories is 1, 2, 3, or 4.
Mode
All instrument modes.
Query
:MEASure:FALLtime?[<source>]
The query returns the fall time of the specified source.
Returned Format
[:MEASure:FALLtime] <value>[,<result_state>]<NL>
<value> is the time at lower threshold – time at upper threshold. If SENDvalid is ON, the
<result_state> is returned with the measurement result. Refer to
for a list of the result states.
Example
10 OUTPUT 707;”:SYSTEM:HEADER OFF”
20 OUTPUT 707;":MEASURE:FALLTIME?"
FREQuency
Command
:MEASure:FREQuency [<source>]
Measures the frequency of the first complete cycle on the screen using the mid-threshold lev-
els of the waveform (50% levels if standard measurements are selected). The source is speci-
fied with the MEASure:SOURce command or with the optional parameter following the
FREQuency command.
The algorithm is:
If the first edge on screen is rising, then
frequency = 1/(time at second rising edge – time at first rising edge)
else,
frequency = 1/(time at second falling edge – time at first falling edge).
<source> is {CHANnel<N> | FUNCtion<N> | WMEMory<N>}. <N> for channels is dependent
on the type of plug-in and its location in the instrument. For functions: 1 or 2. For waveform
memories (WMEMORY): 1, 2, 3, or 4.
Mode
Oscilloscope mode only
Query
:MEASure:FREQuency? [<source>]
Содержание 86100A
Страница 18: ...1 14 Introduction Status Reporting Figure 1 4 Status Reporting Data Structures...
Страница 19: ...1 15 Introduction Status Reporting Status Reporting Data Structures continued...
Страница 94: ...2 40 Sample Programs BASIC Programming Examples...
Страница 124: ...4 16 Root Level Commands VIEW...
Страница 125: ...5 DATE 5 2 DSP 5 2 ERRor 5 3 HEADer 5 4 LONGform 5 5 MODE 5 6 SETup 5 7 TIME 5 7 System Commands...
Страница 132: ...5 8 System Commands TIME...
Страница 140: ...6 8 Acquire Commands SWAVeform RESet...
Страница 152: ...7 12 Calibration Commands STATus...
Страница 192: ...11 12 Display Commands SSAVer...
Страница 202: ...12 10 Function Commands VERTical RANGe...
Страница 203: ...13 AREA 13 2 DPRinter 13 2 FACTors 13 3 IMAGe 13 3 PRINters 13 4 Hardcopy Commands...
Страница 316: ...21 12 TDR TDT Commands Rev A 05 00 and Below STIMulus...
Страница 332: ......
Страница 353: ...26 DISPlay 26 2 LOAD 26 2 SAVE 26 3 XOFFset 26 3 XRANge 26 3 YOFFset 26 3 YRANge 26 4 Waveform Memory Commands...