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5. Impulse and Resolution Bandwidth Selectivity
Test
HKR
P
i
e
REF
0.0
aBm
Al-TEN
10
d0
-0.
10
aw
4.04
HHZ
30
a0
/
/
\
I.
Figure 4-5. 60
dB
Bandwidth Measurement
4. Press MARKER In] and position the positive movable marker 60
dB
down from the signal peak on the negative-going edge of the signal
trace (the MARKER
@J
amplitude readout should be 0.00
dB
*0.50
dB).
5. Read the 60
dB
bandwidth for the 3 MHz resolution bandwidth
setting from the MARKER
Ia]
frequency readout (see Figure 4-5)
and record the value in Table 4-5.
6. Select the spectrum analyzer
@iE%V],
~FREQUENCY
SPAN), and
CV’DEO]
according to
Table
4-5. Measure the 60
dB
bandwidth
for each resolution bandwidth setting by the procedure of steps 3
through 5 and record the value in
‘fable
4-5.
7. Record the 6
dB
bandwidths for each resolution bandwidth setting
from
Table
4-3 in
Table
4-5.
8. Calculate the bandwidth selectivity for each setting by dividing the
60
dB
bandwidth by the 6
dB
bandwidth. The bandwidth ratios
should be less than the maximum values shown in
‘fable
4-5.
9. The 60
dB
bandwidth for the 10 Hz resolution bandwidth setting
should be less than 100 Hz.
4.14
Option 462