R&S SGT100A User Manual page 546

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R&S SGT100A
The
umns contain the resulting I and Q values represented in Little endian format.
Figure 12-4: I and Q values calculation and conversion
3. Use an ASCII editor which is able to handle binary data. Create and add the follow-
ing mandatory tags before this binary data set can be further processed:
●
●
An example of the SICO.wv file contents could be:
{TYPE: SMU-WV, 0}{CLOCK: 10e6}{LEVEL OFFS: 3.010300,0.000000}
0000FF7F8E27BB79 ... 72D8BB79
To simplify the example, the checksum is set to 0, i.e. the instrument does not eval-
uate a checksum.
Tip: The tags TYPE, CLOCK, LEVEL OFFS and WAVEFORM are mandatory for each
waveform. All other tags are optional and can be inserted after the TYPE tag in
arbitrary order.
4. Pack the binary data into a
{WAVEFORM-Length: #I0Q0I1Q1I2Q2 ... InQn}
●
●
●
The contents of the waveform file SICO.wv for 20 I/Q pairs is now ready for opera-
tion and reads:
{TYPE: SMU-WV,0}
{CLOCK: 10e6}
{LEVEL OFFS: 3.010300,0.000000}
{WAVEFORM-81:#I0Q0I1Q1...InQn}
User Manual 1176.8674.02 ─ 07
How to Manually Create a Waveform Using Tag File Format
Figure 12-4 shows the calculation and conversion steps. The highlighted col-
CLOCK
LEVEL OFFS
Calculate the Length
Length = Number of I/Q pairs * 4 + 1 = 20*4 + 1 = 81 bytes
Place the string {WAVEFORM-81:# at the beginning of the data set
Place the symbol } at the end of the data set
WAVEFORM tag with the described structure.
Waveform and List Format
515