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PERFORMANCE TESTS
MODEL
8559A
PERFORMANCE TESTS
4-1
6.
RESOLUTION BANDWIDTH SELECTIVITY (Cont'd)
Set RESOLUTION BW to 300 kHz, leaving FREQ SPAN/DIV set to
0.
Repeat steps 14 through 18.
kHz
Set RESOLUTION BW to 1 MHz, leaving FREQ
SPAWDIV set to 0. Repeat steps 14 through 18.
MHz
Select ALT IF (switch pushed in). Set RESOLUTION BW to
3
MHz, leaving FREQ SPAN/DIV set to 0.
Repeat steps 14 through 18.
MHz
Return ALT IF switch to OFF position. With
RESOLUTlON BW still in 3 MHz and FREQ SPAN/DIV
set to 0, repeat steps 14 through 18.
MHz
In Table 4
-
4, record 3
-
dB bandwidths computed in 4
-
15 Resolution Bandwidth Accuracy test.
In Table 4
-
4, record 60
-
dB bandwidths recorded in this procedure.
For each resolution bandwidth, divide 60
-
dB bandwidth by 3
-
dB bandwidth to obtain Resolution Band
-
width Ratio. Each ratio should be less than 15: 1.
TABLE
4-4.
RESOLUTION BANDWIDTH SELECTIVITY
10
kHz
1
3;;;
1
RESOLUTION
BW Setting
3
MHz
3 MHz
(ALT
IF)
1
MHz
300
kHz
100 kHz
Actual
3 dB BW
Actual
60 dB BW
Resolution Bandwidth
Ratio (60
dB13 dB BW)