Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 335)

119.

On the spectrum analyzer, key in LOG SCALE (ENTER

dB/Div)

dB,

MARKER

L@Z%Zj.

120.

Readjust 22-turn (IF Offset) potentiometer

A6A12R83

D as

necessary to maximize the amplitude of the 15.0

GHz

signal on

the spectrum analyzer display.

121.

Set the synthesized sweeper controls as follows:

START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.12.5

GHz

STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18.6

GHz

RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on

LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XTAL

SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.30

SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONT

122.

On the spectrum analyzer, key in TRACE A [CLEAR-WRITE),

(

SWEEP TIME

)

2s,

MARKER (OFF), (HOLD. As the spectrum

analyzer completes each sweep, a series of approximately 22 new

responses should be displayed, as shown in Figure 3-98. The

peaks of these responses coarsely outline the spectrum analyzer

frequency response.

123.

Gradually adjust (Band D Lower Segment) A6AllR57 Dl and

(Band D Upper Segment)

A6AllR75

D2 for maximum flatness of

the displayed signal responses. The adjustments are interactive,

with A6AllR57 Dl having the most effect on the level of

the displayed signals below mid-band (approximately 15.5

GHz),

and A6AllR75 D2 having the most effect on the level of

the displayed signals above mid-band. Adjust A6AllR57

counterclockwise to increase the level of the displayed signal

responses below mid-band. Adjust

A6AllR75

D2 clockwise

to increase the level of the displayed signal responses above

mid-band. See Figure 3-90 for the locations of A6AllR57

and

A6Al

lR75

D2.

2 1. Frequency Response Adjustments

the displayed 15.0

GHz

signal. Adjust 17-turn (Band D Step

Gain) potentiometer

A6AlOR27

GD as necessary to adjust the

amplitude of the displayed 15.0

GHz

marker to -10.00

dBm

fO.10

dB.

Adjust

A6AlOR27

GD counterclockwise to increase

the signal level, and clockwise to decrease the signal level.

A6AlOR27

GD does not have sufficient range, adjust the

amplitude of the displayed 15.0

GHz

marker as close as possible

to -10.00

dBm.

See Figure 3-90 for the location of

A6AlOR27

GD.

Note

If the displayed signals at the high end of the band drop off by more

than 2-3

dB,

center A6AllR75 D2 and proceed to step 125.

124. On the spectrum analyzer, key in

@WEEP

TIME)

5s,

LOG SCALE

[

ENTER

dB/Div)

dB,

TRACE B [VIEW), (SAVE) 4,

c-1

2s,

TRACE B [BLANK),

[ml.

125. Readjust 17-turn (YTX Diode Bias) potentiometer

A6AlOR12

to maximize the overall level of the displayed signal responses

from 12.5

GHz

to 18.6

GHz

on the spectrum analyzer display.

Then, adjust

A6AlOR12

VD clockwise until signal responses at

Adjustments 3-195

1 2 ... 330 331 332 333 334 335 336 337 338 339 340 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 335

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