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OBW Occupied Bandwidth
OBW Measurement Results
Variable
or Trace
Description
units
OBWBW
OBWLOWER
OBWUPPER
OBWFERR
A variable that contains the bandwidth measured by OBW.
HZ
A variable that contains the relative lower frequency limit of the occupied
Hz
bandwidth. The lower frequency limit is relative to the center frequency of
the spectrum analyzer. The lower frequency limit is equal to the frequency
of the lower occupied bandwidth edge minus the center frequency of the
spectrum analyzer.
A variable that contains the relative upper frequency limit of the occupied
Hz
bandwidth. The upper frequency limit
is
relative to the center frequency of
the spectrum analyzer. The upper frequency limit
is
equal to the frequency
of the upper occupied bandwidth edge minus the center frequency of the
spectrum analyzer.
A variable that contains the occupied bandwidth transmit frequency error.
Hz
This error is equal to the following:
OBWPWR
TRA
F
~equencyerror
=
(OBWUPPER + OBWLOWER)
2
A variable that contains the total power in the occupied bandwidth. The
Determined by
total power of the occupied bandwidth is a summation of the power over
AUNITS
command.
the measured occupied bandwidth.
Default unit is dBm.
TRA is trace
A.
Trace A contains the swept RF spectrum that was used to
Determined by the
measure occupied bandwidth.
trace data format
(TDF) command.
Restrictions
Executing OBW turns off the following functions: windows display mode
(WINON),
N
dB
point
measurement (NDBPNT), the
FFI’
menu measurements (FFIAUTO, FFTCONTS,
FFTSNGLS),
gate utility functions (GDRVUTIL), TO1 measurement
(TOI),
marker table (MKTBL), peak table
(PKTBL), percent AM (PCTAM), and peak zoom (PKZOOM).
5-388 Programming Commands