Racal Instruments 3162A/B, User Manual

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User Manual 3162A/B
Using The Instrument 3-18
OUTPut:SYNC:POSition <value>
The SYNC position can be selected from point 0 to the last point of the active
waveform. SYNC position has to be programmed for each segment. The default
SYNC position is at the beginning of the segment or waveform.
The query:
OUTPut:SYNC:POSition?
queries the output SYNC position and returns an integer value.
Using the Built-In
Standard Waveforms
The Standard Waveform commands control the various parameters of the active
standard waveform. Standard waveform commands operate in a similar fashion
for each of the standard waveforms.
To simplify the description of this set of commands, only the standard
waveform commands for the PULSe function are described below. Use the
same procedure to program parameters for the SINusoid, TRIangle, RAMP,
SQUare, SINC, GAUSsian, EXPonential, NOISe, and DC waveforms.
The number of points used to define each standard waveform is the same.
Thus, some parameters may not have any effect on the waveform because too
few points are available to generate the waveform. The number of points for
each standard waveform at various frequencies is given below. The
mathematical expressions for the positive exponential pulse, negative
exponential pulse, gaussian pulse, and sinc pulse are given.
All standard parameters use the same computation. Therefore, you should
expect that at some frequencies, for instance 50MHz, the sinc pulse would not
appear as it should because there are only ten points available to generate it.
The equations used for generating EXPonential, GAUSsian and SINC
parameters are as follows:
For the positive EXPonential:
Where A = Amplitude
m = Current point (1..N)
N = Total number of points
t = Time constant set by user
For the negative EXPonential:
F(m)=-A+A[e -1]-A
m
0 . 6 3 t
F(m)=2Ae -A -m
t