HP 8568B kHz, + 10 dBm, Press SWEEP, Press MARKER, center the signal on the display, Subtract the value in column 1 from, 7.Press MARKER [PEAK SEARCH), MARKER In]

12. Option 857 Amplitude Fidelity Test

Equipment Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . HP 1250-0780

(2) BNC to BNC cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure Log Fidelity

1.On the spectrum analyzer, connect the CAL OUTPUT to INPUT 2. Press IRECALL) @ and adjust the FREQ ZERO pot for maximum amplitude.

2.Press (JNSTR PRESET] on the analyzer. Key in analyzer settings as follows:

( C E N T E R F R E Q U E N C Y ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 MHZ

[	F R E Q U E N C Y SPAN_	)	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	.50 kHz
			)	+ 10 dBm
( R E F E R E N C E L E V E L

3.Set the frequency synthesizer for an output frequency of 20.000 MHz and an output power level of + 10 dBm. Set the amplitude increment for 10 dB steps.

4.Connect equipment as shown in Figure 5-l.

5.Press MARKER [PEAK SEARCH), (jMKR), [MKR +REF LVL] to

center the signal on the display.

6.Press SWEEP I=) on the spectrum analyzer and wait for the sweep to be completed.

7.Press MARKER [PEAK SEARCH), MARKER In].8.Step the frequency synthesizer output amplitude down 10 dB.9.On the spectrum analyzer, press SWEEP [ml and wait until

the sweep is completed. Press MARKER [PEAK SEARCH), and record the marker A amplitude (a negative value) in column 2 of Table 5-l.

10.Repeat steps 8 and 9, decreasing the output power from the frequency synthesizer in 10 dB steps from -10 dBm to -80 dBm.

11.Subtract the value in column 1 from the value in column 2 for each setting to find the fidelity error.

Option 857 5-3