Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 297)

17.

20130

Loop Phase Lock Adjustments

Note

.Adjustments

AlOA4L16

160 MHz PEAK and

AlOA4L17

160 MHz

PEAK are sealed at the factory and normally do not require

readjustment unless a component failure has occurred. lb verify their

proper adjustment, skip to step 7.

6. Adjust

AlOA4L16

160 MHz PEAK and

AlOA4L17

160 MHz PEAK

to maximize the amplitude of the 160 MHz signal displayed on the

second spectrum analyzer. The two adjustments are interactive;

repeat the adjustment as necessary to ensure maximum signal

amplitude. Refer to Figure 3-80 for the location of

AlOA4L16

160

MHz PEAK and

AlOA4L17

160 MHz PEAK adjustments.

7. Adjust

AlOA4C50

160 MHz PEAK to maximize the amplitude of

the 160 MHz signal displayed on the second spectrum analyzer. If

after adjustment

AlOA4C50

is completely open, select a lower

value for factory-selected component

AlOA4C49;

conversely,

if after adjustment

AlOA4C50

is completely closed, select a

higher

value

for factory-selected component

AlOA4C49.

Refer to

‘Ihble

3-12 for the acceptable range of values and corresponding

HP part numbers for

AlOA4C49,

and to Figure 3-80 for the

location of

AlOA4C50

160 MHz PEAK and

AlOA4C49.

‘Ihble

3-12. Standard Values for AlOA4C49

HP Part Number

0160-3874

0160-4520

0160-4521

0160-4522

0160-4289

8. On the RF Section, key in (CENTER FREQUENCY) 42.450 MHz,

(FREQUENCY SPAN) 100

kHz,

SWEEP

cm),

TRACE A

(CLEARWRITE).

9. Set the controls of the second spectrum analyzer as follows:

CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MHz

FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 MHz

RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LAUTO)

REFERENCE LEVEL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30

dBm

LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV

MARKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. On the second spectrum analyzer, press MARKER (PEAK SEARCH) to

position the marker on the peak response. If this level is not at

least -42

dBm,

repeat steps 3 through 10.

11. Disconnect the second spectrum analyzer from SMB test

connector

AlOA4J4.

Connect the second spectrum analyzer to

AlOA4J2

OUT 160

166 MHz. Connect the DVM to

AlOA4TP3.

Refer to Figure 3-80 for the location of

AlOA4TP3.

Adjustments

3-l

1 2 ... 292 293 294 295 296 297 298 299 300 301 302 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 297

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