Technical data

Quick-Start 1
Getting Started Guide 17
Alignments
Alignments are internal calibration adjustments which each TRX module must make to
ensure that internal signal levels are properly maintained. To avoid interruptions, the
alignments are not run automatically, either at startup or afterward; you must run them
explicitly.
“All” Alignment (daily use)
This alignment of the source and analyzer in the TRX is sufficient to maintain specified
performance, provided that (1) the TRX’s internal temperature has not drifted more than
5 degrees C since the previous alignment, (2) no more than 8 hours have elapsed since
the previous “All” alignment, and (3) no more than 1 week has elapsed since the
previous weekly alignment (see below). The “All” alignment typically takes less than 5
minutes to run.
The TRX’s internal temperature can be checked by sending the SCPI query
:CAL:TEMP:CURR?
To run the alignment, select
System > Alignments > Align Now > All, or send the SCPI
command :CAL:ALL.
NOTE If the test set was recently powered off, allow a 45-minute warm-up period after power
is applied before running the alignment.
Weekly alignment procedure
A more thorough alignment of the source and analyzer in the TRX is required on a
weekly basis. This procedure is similar to the “All” alignment described above, but it
also performs additional alignment functions related to slow-drifting parameters which
do not change significantly over time periods shorter than a week.
There is no function on the
System > Alignments menu which runs all parts of the
weekly alignment procedure. To run the alignment, send the following sequence of SCPI
commands:
:CAL:IF
*WAI
:CAL:RF
*WAI
:CAL:INT:SOUR
*WAI
NOTE The procedure typically takes less than 10 minutes to run. If the test set was recently
powered off, allow a 45-minute warm-up period after power is applied before running
the alignment.