HP 8568B manual 10 DB

15. Spurious Responses Test

SPECTRUM ANALYZER

SYNTHESIZED SMEEPEA

10 DB

ATTENUATOR

300 MHZ LPF

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Figure 2-25. Harmonic Distortion Test Setup

Note Equipment listed is for two test setups, Figure 2-25 and Figure 2-26.

Equipment	Synthesized	Sweeper . . . . . . . . . . . . . . . . . . . . . . . .	...........HP 8340A
	Frequency	Synthesizer . . . . . . . . . . . . . . . . . . . . . .	H P 3335A
	10 dB Attenuator (2 required) . . . . . . . . . . . . . .		: : ii< 84&A Opt 010
	Lowpass Filter (300 MHz) . . . . . . . . . . . . . . . . . . .		. . . . . . . HP 0955-0455
	Adapter, Type N (m) to BNC (f) (2 required)		. . . . . . . . HP 1250-0780
	Adapter, Type N (m) to SMA (f) . . . . . . . . . . . . .		. . . . . . . HP 1250-1250
	Adapter, Type N (f) to BNC (m) . . . . . . . . . . . . .		. . . . . . . HP 1250-0077
	Adapter, Type N (f) to BNC (f) . . . . . . . . . . . . . .		. . . . . . . HP 1250-1474
	Directional	Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . HP 8721A
	Lowpass Filter (50 MHz) (2 required) . . . . . . .		. . . . . . . HP 0955-0306

Procedure Harmonic Distortion

1.Connect equipment as shown in Figure 2-25.

2.On the spectrum analyzer, press [INSTR PRESET). Set the controls of the spectrum analyzer as follows:

CENTER FREQUENCY . . . . . . . . . . . . . . . . .	.............. 280 MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . 10 kHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . - 20 dBm

3. On the synthesized sweeper, key in ~NSTR PRESET], Icw) 280 MHz,

( P O W E R L E V E L ) - 10 dBm.

4.On the spectrum analyzer, key in DISPLAY LINE CENTER] -90 dBm, MARKER [PEAK SEARCH] to position a marker on the peak of the displayed 280 MHz signal.

5.On the synthesized sweeper, press ~POWER LEVEL] and use the ENTRY knob to adjust the amplitude of the displayed 280 MHz

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