Tektronix FCA3000 Series, Programmer'S Manual

Page: 91 / 191

Command Descriptions
Returns <number of trg lvl crossings>,(<TS for trg lvl crossing>,)...deadtime...<number of
trg lvl crossings>(<TS for trg lvl crossing>,)...deadtime...and so forth.
The format is set by the FORMat command, and the data in parentheses is sent if
FORMat:TINFormation ON is active.
MEASure:ARRay:TIError? (Query Only)
This command automatically performs TIE measurements on clock signals from a
prede
fi ned collection of system frequencies: 4, 8, 15.75, 64 kHz or 1.544, 2.048,
5, 10, 27, 34, 45, 52 MHz
TIE is de fi ned as positive and increasing if the measured frequency exceeds the
reference frequency.
Group Measurement
Syntax
MEASure:ARRay:TIError? (array size)[,[<exp
value>[,<resol>],][(@1|(@2)]]
MEASure:ARRay:TSTAmp? (Query Only)
Time stamps are taken of all positive and negative trigger level crossings of the
selected input channel. The commands
MEASure:ARRay:<MeasuringFunction>?
and CONFigure:ARRay:<MeasuringFunction> automatically invoke
FORMat:TINFormation
ON
to get the time stamp data, but when FUNCtion is used
instead, you should normally let it be preceded by the FORMat:TINFormation
ON
command explicitly. Otherwise the TS 2 values are omitted. See Returned
format below.
Measurements are performed in groups of four TS results, two positive and two
negative, with no deadtime between the values. Deadtime between groups is
affected by pacing and interpolator calibration, down to 4
μ s.
Measurement results of 0 indicate negative trigger level crossings, whereas
positive values indicate the number of positive trigger level crossings since the
last reset.
2
TS is the time stamp value in seconds since a certain start event that is not available for external control.
So the TS values can only be used for relative time measurements.
Group Measurement
Syntax
MEASure:ARRay:TSTAmp? (<array size>)[,(@1)|(@2)]
FCA3000, FCA3100, MCA3000 Series Programmer Manual 2-75