HP 8568B manual Synthesized, Frequency, 3335A, Ii 84&A Opt, Lowpass Filter 50 MHz 2 required

15. Spurious Responses Test

SPECTRUM ANALYZER

SYNTHESIZED SMEEPEA

10 DB

ATTENUATOR

300 MHZ LPF

J

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

2-50 P e r f o r m a n c e T e s t s