HP 8559A Operation And Service Manual page 60

PERFORMANCE TESTS
RESOLUTION BANDWIDTH SELECTIVITY (Cont'd)
Set RESOLUTION BW to 300 kHz, leaving FREQ SPAN/DIV set to 0 . Repeat steps 14 through 18.
Set RESOLUTION BW to 1 MHz, leaving FREQ SPAWDIV set to 0. Repeat steps 14 through 18.
Select ALT IF (switch pushed in). Set RESOLUTION BW to 3 MHz, leaving FREQ SPAN/DIV set to 0.
Repeat steps 14 through 18.
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.
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.
RESOLUTION
BW Setting
3 MHz
3 MHz (ALT
IF)
1 MHz
300 kHz
100 kHz
10 kHz
PERFORMANCE TESTS
TABLE RESOLUTION BANDWIDTH SELECTIVITY
Actual
Actual
3 dB BW 6 0 dB BW
MODEL 8559A
kHz
MHz
MHz
MHz
Resolution Bandwidth
Ratio (60 dB13 dB BW)