Agilent Technologies N1996A-503 User Reference page 37

resolution at the new span. However, repeated use of the
zooming in and centering the signal.
Mode
Key Path
Undo Auto Tune
Undo Auto Tune
sets the center frequency back to the center frequency in effect prior to
Auto Tune
pressing the
BW
Activates the resolution bandwidth function and displays the
Key Path
Res BW
Selects the 3 dB resolution bandwidth (RBW) of the analyzer in 10% steps from 10 Hz to
200 , plus bandwidths of 250
kHz
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 Res BW (Auto).
NOTE
When measuring pulsed RF signals, set the RBW to less than 0.3 times
the pulse repetition frequency (PRF). By keeping the RBW < 0.3 x PRF,
the analyzer will be making narrowband ("line mode") measurements.
NOTE
For applications that require 6 dB resolution bandwidths, it is possible
to use an equivalent 3 dB resolution bandwidth. Because the analyzer
has Gaussian RBW, the equivalent 6 dB bandwidth of any RBW filter
can be determined using the following formula: 6 dB RBW = 3 dB RBW
x 1.414. For example, if a 6 dB RBW of 100
equivalent 3 dB RBW Filter would be 100
closest RBW filter for the analyzer that would be used is 68
Chapter 3
SA
Front-panel key
key.
Front-panel key
, 300 , 1
kHz kHz
Meas Off (Spectrum Analyzer) Measurement
Auto Tune
key will continue
Res BW
menu keys.
, 3 , or 5 .
MHz MHz MHz
is required, the
kHz
/1.414 = 70.7
kHz
Mode
. The
kHz
.
kHz
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