HP 8568B, Performance Tests And Adjustments Manual, Page: 279 / 313

5. Impulse and Resolution Bandwidth Selectivity
0 . 0
- 0 .
1 0
Figure 4-5. 60 Bandwidth Measurement
4. Press MARKER In] and position the positive movable marker 60
down from the signal peak on the negative-going edge of the signal
trace (the MARKER
amplitude readout should be 0.00
5. Read the 60 bandwidth for the 3 MHz resolution bandwidth
setting from the MARKER frequency readout (see Figure 4-5)
and record the value in Table 4-5.
6. Select the spectrum analyzer
SPAN
),
and
according to 4-5. Measure the 60 bandwidth
for each resolution bandwidth setting by the procedure of steps 3
through 5 and record the value in
4-5.
7. Record the 6 bandwidths for each resolution bandwidth setting
from 4-3 in 4-5.
8. Calculate the bandwidth selectivity for each setting by dividing the
60 bandwidth by the 6 bandwidth. The bandwidth ratios
should be less than the maximum values shown in 4-5.
9. The 60 bandwidth for the 10 Hz resolution bandwidth setting
should be less than 100 Hz.
Option 462