Performance Verification
d. Select Define lo
cated on the right side of the Markers control bar to open
the Define Markers control panel.
e. Select Power from the Readouts dropdown menu. This sets the units
to dBm/Hz.
5. Set the RSA5100B to each of the Center Frequencies listed in the following
table by pressing the Freq key and entering the value listed. After averaging is
completed, press the Peak key on the Markers control bar. As noted below,
if the peak is on a spur, not the noise floor, place the marker on the highest
point of the noise floor.
NOTE. The intent of the DANL test is to measure the average internal noise level
of the instrument. The DANL specification does not cover residual spurs. If the
specific measurement frequency results in measuring a residual spur that is visible
above the noise level, the DANL specification applies not to the spur but to the
noise level on either side of the s pur. Please refer to the Spurious Response
specifications. (See Table 20.) Also, refer to the Spurious Response section of this
procedure to determine whether or not a residual spur is within the specification.
(See page 124, Spurious Response.)
Table 77: Frequencies of interest for DANL LF path check (Option 50/51)
Center frequency Marker Noise level Frequency range
1.1 MHz
31.9 MHz
1MHz-32MHz
DANL – Preamp ON, RF
Path (Option 50/51 Only)
1. Reset the RSA5100B to factory defaults: select Setup > Preset (Main).
2. Select Tools > Alignments and select Align Now.
3. Set the RSA5100B:
Reference Level
Setup > Amplitude > Internal Settings > Ref Level
–50 dBm
Internal Attenuator
Setup > Amplitude > Internal Settings > Internal
Attenuator
0 dB (Auto unchecked)
RF & IF Optimization
Setup > Amplitude > RF & IF Optimization
Minimize Noise
Internal Preamp
Setup > Amplitude > Internal Settings > Internal
Preamp
ON (Internal Preamp box checked)
Center Frequency
Setup > Settings > Freq & Span > Center
1.1 MHz
118 RSA5100B Series Technical Reference
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