R&S FSH
Digital Modulation Analyzer
Measurements on CDMA2000 Signals
Operating Manual 1309.6275.12 - 14
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7.3 Measurements on CDMA2000 Signals
Equipped with the software application R&S FSH-K46, you can perform measurements
on downlink CDMA2000 signals according to the 3GPP2 standard with your R&S FSH.
You can expand the functionality by adding the R&S FSH-K46E firmware application.
This application performs code domain power measurements on downlink CDMA2000
signals according to the standard.
M
Press the MODE key
M
Press the "Dig Mod Analyzer" softkey
M
Select the "CDMA2000 BTS" menu item.
The R&S FSH starts the signal analysis.
When starting a measurement, the R&S FSH first records a section of the signal that
lasts approximately 27 ms (or about 1 Sync Frame Period).
If the instrument is in a triggered mode (external or GPS trigger), it searches for the
start of the PN code in the vicinity of the PN offset you have entered. If you are using
the automatic PN Offset, the R&S FSH performs a full search for the PN offset and
reports the PN found. In a "free run" situation, the R&S FSH searches for the start of
the PN sequence over the entire signal length.
The R&S FSH performs various general measurements over one PCG (power control
group) as well as measurements on specific channels. It then shows the results in one
of three formats:
C
tabular form in the "Result Summary" display,
C
scrollable table form in the "Code Domain Channel Table", or
C
graphical form in the "Code Domain Power" result display.
To get highest measurement accuracy, it is necessary to synchronize the reference
frequency of the R&S FSH with the base station via the EXT REF IN input or with an
optional GPS receiver.
7.3.1 The Result Summary
The default result display is the result summary. The result summary shows various
measurement results and hardware settings in numerical form.
M
Press the "Result Display" softkey.
M
Select the "Result Summary" menu item.
The R&S FSH shows the numerical results in a table.
