Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 292)

17. 20/30 Loop Phase Lock Adjustments

42.

43.

44.

45.

On the second spectrum analyzer, press (CENTER FREQUENCY) 140

MHz MARKER (PEAK SEARCH] to position a marker on the peak of

the displayed 140 MHz signal, and verify that the output power

level of the

PLLl

IF is at least -14

dBm.

If it is not, slightly readjust AlOA3Lll 165 MHz NULL to increase

the amplitude of the 140 MHz signal displayed on the second

spectrum analyzer to -14

dBm.

Refer to Figure 3-78 for the

location of

AlOA3Lll

165 MHz NULL adjustment.

Key in MARKER

(SPEAK

SEARCH],

[MKR

REF

LVL)

on the second

spectrum analyzer to position the peak of the 140 MHz signal at

the top graticule line. Press MARKER la] on the second spectrum

analyzer.

On the synthesized sweeper, key in

CSTART

FREQ) 320.3 MHz

(sTop)

326.3 MHz

[sWEEPI

100

Icw] 320.3 MHz.

Press [CENTER FREQUENCY) 163 MHz TRACE A

(j-1

on the

second spectrum analyzer. Allow the synthesized sweeper to tune

slowly from 320.3 MHz to 326.3 MHz, noting the corresponding

160 MHz to 166 MHz signal on the display of the second spectrum

analyzer.

Note

The corresponding 160 MHz to 166 MHz signal might be below the

displayed noise level on the second spectrum analyzer.

46. On the second spectrum analyzer, press MARKER [PEAK SEARCH)

to position the second marker on the peak response between 160

MHz and 166 MHz. This level should be at least 60

down from

the level of the 140 MHz signal in step 42.

47. Set the RF Section LINE switch to STANDBY. Disconnect the

second spectrum analyzer from

AlOA3J3

OUT

PLLl

IF, and

disconnect the synthesized sweeper from the cable 4 (yellow).

48. Reinstall

AlOA3

PLLl

IF Assembly in the RF Section. Reconnect

the cable 6 (blue) to

AlOA4J2

OUT 160-166 MHz, the cable 4

(yellow) to

AlOAlJ3

OUT 200-300 MHz, and the cable 3 (orange)

to AlOA3J3 OUT PLLl IF.

3-152 Adjustments

1 2 ... 287 288 289 290 291 292 293 294 295 296 297 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 292

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