HP 8559A manual 61

PERFORMANCETESTS MODEL 8559A

PERFORMANCE TESTS

4-16. 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 Bandwidth Ratio. Each ratio should be less than 15:1.

		TABLE 4-4. RESOLUTIONBANDWIDTH SELECTIVITY
	RESOLUTION		Actual	Actual	Resolution Bandwidth
	BW Setting		3 dB BW	6 0 dB BW	Ratio (60 dB13 dB BW)
	3 MHz
	3 MHz (ALT IF)
1	1 MHz	1
	300 kHz
	3;
	100 kHz
	10 kHz