HP 8559A PERFORMANCE TESTS, 4-11. FREQUENCY SPAN ACCURACY (Cont'd)

PERFORMANCETESTS MODEL8559A

PERFORMANCE TESTS

4-11.FREQUENCY SPAN ACCURACY (Cont'd)

Adjust spectrum analyzer TUNING control to position one spectral line (from comb generator) at first graticule line (left-hand edge of display). Measure the error between 17th spectral line and 9th graticule line as shown in Figure 4-2. Error should be no greater than +0.4 division.

110.4 DIVISION

FIRST G RATICULE LlNE

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NINTH GRATICULE LlNE

COMB SIGNALS

FIRST SPECTRAL LlNE SEVENTEENTH SPECTRAL LlNE

CENTERFREQUENCY

FIGURE 4-2.FREQUENCYSPAN ACCURACYMEASUREMENT FOR SEVENTEENTHSPECTRALLlNE

Set FREQ SPAN/DIV to 100 MHz. Adjust TUNING control to position one spectral line on the first graticule line. Measure the error between ninth spectral line and ninth graticule line. Error should be no greater than +0.4 division.

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Set FREQ SPAN/DIV to 50 MHz. Adjust TUNING control to position one spectral line on the first graticule line. Measure the error between fifth spectral line and ninth graticule line. Error should be no greater than k0.4 division.

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Set comb generator COMB FREQUENCY - MHz for 10-MHz comb. Set spectrum analyzer FREQ SPAN/DIV to 20 MHz. Adjust TUNING control to position one spectral line on the first graticule line. Measure the error between 17th spectral line and ninth graticule line as shown in Figure 4-3.Error should be no greater than k0.4 division.

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Set FREQ SPAN/DIV to 10 MHz. Adjust TUNING control to position one spectral line on the first graticule line. Measure the error between ninth spectral line and ninth graticule line. Error should be no greater than k0.4 division.

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