HP 8568B MHz, Set, (jEGi, 300 Hz, VlDEo], @‘iYiF),[XF6, 12. Amplitude Fidelity Test, Figure 2-22.Amplitude Fidelity Measurement

12. Amplitude Fidelity Test

8.The fidelity error for amplitude steps from -10 dB to -80 dB should be <& 1.0 dB.

9.The fidelity error at the -90 dB setting should be s&l.5 dB.

YKR A

REF 9.7 d&n ATTEN 20 dB

4J

10 d0/

L

1

I

I

1

I

I

I

I

1

CENTER 20.000

iB0

MHz

1

SWP

SPAN 0

nz

RES

BW

I

kHZ

VBW

HT.

300

n..c

Figure 2-22. Amplitude Fidelity MeasurementLinear Fidelity 10. Key in analyzer settings as follows:

(jEGi-- ................................................. 300 Hz

FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I MHz

[M, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 MHz

11.Set the frequency synthesizer for an output power level of + 10 dBm.12.Press SCALE LIN pushbutton. Press MARKERCPEAK SEARCHJ[MKR) to center the signal on the display.

13.Set (FREQUENCY SPAN) to 0 Hz and [VlDEo] to 1 Hz. Press @‘iYiF),[XF6-~ (resolution bandwidth), MARKER a.

14.Decrease frequency synthesizer output amplitude by 10 dB steps, noting the MARKER A amplitude and recording it in column 2 of ‘Ikble 2-17.

Performance Tests 2 - 43