Bw/Avg; Res Bw - Agilent Technologies PSA Series User And Programming Manual
Spectrum analyzers
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- Service manual (436 pages) ,
- Manual (382 pages) ,
- Getting started manual (82 pages)
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2.3 BW/Avg
Activates the resolution bandwidth function, and displays the menu keys that control both
the bandwidth and averaging functions.
2.3.1 Res BW
Enables you to select the 3.01 dB resolution bandwidth (RBW) of the analyzer in 10% steps
from 1 Hz to 3 MHz, plus bandwidths of 4, 5, 6, or 8 MHz.
If an unavailable bandwidth is entered with the numeric keypad, the closest available
bandwidth is selected.
Sweep time is coupled to RBW. As the RBW changes, the sweep time (if set to
changed to maintain amplitude calibration.
Video bandwidth (VBW) is coupled to RBW. As the resolution bandwidth changes, the
video bandwidth (if set to
When Res BW is set to
using the CISPR and MIL detectors (Quasi Peak, EMI Average EMI Peak and MIL Peak).
For these detectors, Auto RBW coupling is to the center frequency. The ratio of span to
RBW is set by
Span/RBW
approximately 106:1 when auto coupled. When Res BW is set to
entered by the user, and these bandwidths are used regardless of other analyzer settings.
In zero span, the auto/manual function of this key is not applicable. When
NOTE
BW (Auto)
span will revert to the Auto value when you return to non-zero span. When
Res BW (Man)
zero span will be maintained when you return to non-zero span.
When the Quasi Peak or one of the EMI detectors are selected, the resolution
NOTE
bandwidths available are restricted to the set defined in
Bandwidths with RBW Set to Auto," on page
is selected, the resolution bandwidths available are restricted to the set
defined in
RBW Set to Auto," on page
A # mark appears next to Res BW on the bottom of the analyzer display when it is not
coupled. To couple the resolution bandwidth, press
Chapter 2
) changes to maintain the ratio set by
Auto
, resolution bandwidth is autocoupled to span, except when
Auto
(described on
page
78). The factory default for this ratio is
is selected in non-zero span, any changes to Res BW while in zero
is selected in non-zero span, any changes to Res BW while in
Table 2-4, "MIL Specifications for Bandwidth vs. Frequency with
88.
Instrument Functions: A - L
VBW/RBW
, bandwidths are
Man
Table 2-2, "CISPR
85. When the MIL Peak detector
or
Res BW (Auto)
Auto All
BW/Avg
) is
Auto
.
Res
.
69
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