Agilent Technologies HP 8566B Especificações descarregar pdf (Página 336)

2 1. Frequency Response Adjustments

126.

127.

128.

129.

the high end of the band drop in amplitude by approximately

0.75

dB.

Readjust 22-turn (IF Offset) potentiometer

A6A12R83

D as

necessary to maximize the overall level of the displayed signal

responses from 12.5

GHz

to 18.6

GHz

on the spectrum analyzer

display. If the displayed signal responses peak at widely different

settings of

A6A12R83

D, perform the following steps:

a. Adjust 22-turn (YTX Linearity) potentiometers

A6AlOR41

LB2,

A6AlOR42

LB3,

A6AlOR70

LB4,

A6A610R34

LR2,

A6AlOR37

LR3, and

A6AlOR76

LR4 fully counterclockwise

if they have not already been so adjusted; do not readjust

A6A12R40

LB1 or

A6AlOR31

LRl.

b. Readjust 22-turn (IF Offset) potentiometer

A6A12R83

D as

necessary to maximize the overall level of the displayed signal

responses at the low end of the band.

c. On the spectrum analyzer, key in MARKER

(j-1

and

position the marker at the point in the band where the signal

responses begin to fall off from their maximum value.

d. Adjust 22-turn (YTX Linearity) potentiometer

A6AlOR41

LB2

clockwise until the displayed signal responses at the high end

of the band begin to drop. Continue to adjust

A6AlOR41

LB2

until the

rolloff

point aligns with the position of the marker.

See Figure 3-90 for the location of

A6AlOR41

LB2,

A6AlOR42

LB3,

A6AlOR34

LR2 and

A6AlOR37

LR3.

e. Readjust 22-turn (YTX Linearity) potentiometer

A6AlOR34

LR2 clockwise to maximize the displayed signal responses for

approximately 3 divisions to the right of the marker.

f. On the spectrum analyzer, key in MARKER

[NORMAL)

and

position the marker at the point in the band where the signal

responses begin to fall off from their maximum value.

g. Readjust 22-turn (YTX Linearity) potentiometer

A6AlOR42

LB3 clockwise until the displayed signal responses at the high

end of the band begin to drop. Continue to adjust

A6AlOR42

LB3 until the

rolloff

point aligns with the position of the

marker.

h. Readjust 22-turn (YTX Linearity) potentiometer

A6AlOR37

LR3 clockwise to maximize the displayed signal responses at

the high end of the band.

i. Readjust

A6A12R83

A6AlOR34

LR2, and

A6AlOR37

LR3

as necessary to maximize the displayed signal responses from

12.5

GHz

to 18.6

GHz

on the spectrum analyzer display.

Gradually readjust (Band D Lower Segment) A6AllR57

and (Band D Upper Segment) A6AllR75 D2 as necessary for

maximum flatness of the displayed signal responses.

On the spectrum analyzer, key in SWEEP

(SINGLE),

[SWEEP TIME)

15Os,

TRACE A [BLANK), TRACE B

[MAX]),

I-1

6, TRACE B

[CLEAR-WRITE],

lsAVEJ

m).

Press SWEEP

CRINGLE]

on the spectrum analyzer and wait for the

sweep to complete (150 seconds) and the SWEEP LED to turn

off. As the spectrum analyzer tunes from 12.5

GHz

to 18.6

GHz,

the spectrum analyzer frequency response should be displayed as

TRACE B.

3-196 Adjustments

1 2 ... 331 332 333 334 335 336 337 338 339 340 341 ... 404 405

Comentários a estes Manuais

Sem comentários

Agilent Technologies HP 8566B Especificações Página 336

Comentários a estes Manuais

Manuais e produtos relacionados com Medição, teste e controlo Agilent Technologies HP 8566B