Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 298)

17. 20/30 Loop Phase Lock Adjustments

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

CENTER FREQUENCY

..................................

166 MHz

FREQUENCY SPAN

......................................

.50

MHz

REFERENCE LEVEL

................................... -14

dBm

MARKER

................................................

(j-j

Note

Adjustment AlOA4Lll

PLL3

VCO ADJ is sealed at the factory and

normally does not require readjustment unless a component failure

has occurred.

AlOA4Lll

PLL3 VCO ADJ should be adjusted with

the metal shield installed over the PLL3 VCO on

AlOA4

PLL3

Converter Assembly.

13. A 166 MHz signal should be centered on the display of the second

spectrum analyzer, indicating that PLL3 is phaselocked. If not,

coarse adjust AlOA4Lll

PLL3

VCO ADJ to center the signal

displayed on the second spectrum analyzer and phaselock PLL3.

14. With PLL3 phaselocked, readjust

AlOA4Lll

PLL3 VCO ADJ as

necessary for a DVM indication of -7.0

0.1 Vdc.

15. On the RF Section, key in

CCENTER

FREQUENCY] 42.569999 MHz,

[

FREQUENCY SPAN

]

WEEP

(SINGLE),

E A

(CLEARWRITE].

The DVM indication should be -3.5

0.6 Vdc.

16. On the RF Section, key in (CENTER FREQUENCY) 42.6499

MHz, (FREQUENCY SPAN) 100

kHz,

SWEEP

(?iIGZ],

TRACE A

(CLEARWRITE).

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

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

.164.001

MHz

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

REFERENCE LEVEL

. . . . . . . . . . . . . . . . . . . -14

dBm

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

and verify that the output power level of the PLL3 VCO at

164.001 MHz is -20

dBm

as indicated by the marker.

If it is not, note the amplitude and change the values of

factory-select resistors

AlOA4R29

and

AlOA4R33

as necessary.

Refer to

‘Iable

3-13 for a list of standard resistor values and

corresponding change in circuit gain to adjust the PLL3 VCO

output power level to -20

dBm,

and to Table 3-4 for HP part

numbers.

‘lhble

3-13.

Standard Values for AlOA4R29 and AlOA4R33

Resistors

R29 R33

68.1

68.1 75

75 75

68.1

82.5

90.9

3-l 56 Adjustments

1 2 ... 293 294 295 296 297 298 299 300 301 302 303 ... 404 405

Commentaires sur ces manuels

Pas de commentaire

Agilent Technologies HP 8566B Spécifications Page 298

Commentaires sur ces manuels

Produits connexes et manuels pour Mesure, test et contrôle Agilent Technologies HP 8566B