15 Power Control Measurement
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Each DATA row has a timestamp in the second column (as of firmware revision A.11.01). So, for example, if
Trace 0 had a relative start time of 1729.523 sec, then the first DATA row would look like this:
DATA,1729.523
And if Trace 13 had a relative start time of 100.45 sec, then the fourteenth data row would look like:
DATA13,100.453
To find the absolute time for the relative timestamps of each trace, the last row before the first DATA row
gives the absolute start time of the Spectrogram, in the form YYYYMMDDHHMMSS
So, for example, if the absolute start time is 13:23:45:678 on January 30, 2012, this row would look like:
Start Time,20120130132345678
NOTE:
The resolution of the absolute time stored is 1 ms, which matches up with the fact that the fastest sweep
time is also 1 ms. However, there is no specification for the absolute accuracy of the clock in the analyzer,
nor is there any facility provided to allow the user to set this time to any particular degree of accuracy.
Traces that have not yet been filled in the Spectrogram display are empty; there is no DATA header for
them. The file ends after the last non-empty trace.
Imagine that, at the point where a Spectrogram Meas Result is requested, the following screen is showing:
W-CDMA & HSPA Measurement Applications Reference
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Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...