NDB

Number of

dB
Specifies the distance (in
dB)
from the signal peak for the N
dB
points measurement (NDBPNT).
Syntax
dB
from
XNDB
Item Description/Default
Rw!e
Number
Any negative real or negative integer number. Default unit is
dB.
-
1
to -80
dB.
Preset State: -3
dB.
Related Commands: MKBW, MKPX, NDB, NDBPNT, NDBPNTR, TH.
Restrictions: Not available for the windows display mode.
Example
OUTPUT
718;"MOV
NDBPNT,l;"
lkns
on the N dB points
masurmt.
OUTPUT
718;"NDB
-6DB;"
Sets
the N
dB
points
masurernent
to
measure
6
dB
below
the signal’s peak.
OUTPUT
718;"NDBPNTR?;"
Queries NDBPNTR. NDBPNTR contains the rneasurenzent
results of the N dB points
measurement.
ENTER 718;Six
Stores the result in the variable Six.
Description
When the
NdB
points function is turned on, the spectrum analyzer finds the bandwidth, at
the number of
dB
down specified by the NDB command, of the highest on-screen signal. The
highest on-screen signal must be greater than the peak excursion above the current threshold,
but the N
dB
points may fall below the threshold.
Query Response
dB
from
/
peak
\
output
termination
+
5.380
Programming Commands