Rohde & Schwarz CMU-K20, Operating Manual

Page: 184 / 646

Signalling: Power Measurements
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.106 E-12
TSC detected
Training sequence of the measured RF signal.
Out of Limit
Relative number of measured bursts that are out of the
tolerances defined by the limit lines.
Burst Matching
Error message if the displayed curve is out of tolerance.
Remote control
Settings are read out using the query corresponding to the setting command
(setting command with appended question mark).
For scalar measurement results:
READ[:SCALar]:POWer[:NORMal][:GMSK]?
CALCulate:POWer[:NORMal][:GMSK]:LIMit:MATChing?
FETCh[:SCALar]:POWer[:NORMal][:GMSK]?
SAMPle[:SCALar]:POWer[:NORMal][:GMSK]?
Measurement
curves (arrays)
The measurement result is displayed as a continuous measurement curve in the
test diagram together with the limit lines, markers, and the D-line, if defined. The
curve is derived from 668 equidistant measurement points with a ¼ symbol spacing
covering a time range between –10 symbols and 156 ¾ symbols.
The measurement curve in the
Power
measurement menu shows the measured
burst power (in dB) as a function of time (in symbol periods). The displayed result
depends on the test settings. The display mode for the measurement curve
(Minimum, Maximum, Average, Current)
is indicated in the upper right corner of the
diagram.
The scale of both axes can be changed via the
Display Area
hotkey.
Remote control
READ:ARRay:POWer[:NORMal][:GMSK]...?
READ:ARRay:POWer[:NORMal][:GMSK]:LIMit:MATChing:...?
FETCh:ARRay:POWer[:NORMal][:GMSK]...?
SAMPle:ARRay:POWer[:NORMal][:GMSK]...?
Limit Check
The result of the limit check is visualized in two colored bars below the diagram. In
each area of the burst, the upper (lower) bar turns red if the result exceeds (falls
below) the power/time template defined in the
Limit Lines
tab of the
Power
Configuration
menu.
Note: Limit check for multislot configurations
In the P/t Normal... applications it is possible to analyze the MS signal
in a single timeslot, irrespective of the DUT's multislot configuration.
The CMU uses the tolerance template according to the measurement
application.
The single slot template (see section
Limit Lines
on page 4.32 ff.) can
cause ambiguities if the MS also transmits on one of the timeslots
adjacent to the measured slot. The multislot template doesn't specify
the burst edges in the guard period between two active timeslots, so
the single slot limit check may erroneously indicate an excess signal
level. To avoid any misleading results the upper limit check in the
P/t
Normal...
applications is disabled for MS multislot configurations with
adjacent active timeslots (Signalling mode only). The info box shows
invalid results "---".
Remote control
CALCulate[:SCALar]:POWer[:NORMal][:GMSK]:LIMit:MATChing...?
深圳德标仪器
135-1095-0799