Agilent Technologies HP 8566B Dokumentacja Pobierz pdf (Strona 340)

2 1. Frequency Response Adjustments

153.

154.

155.

156.

157.

158.

159.

160.

161.

162.

163.

marker. See Figure 3-90 for the locations of

A6AlOR70

LB4

and

A6AlOR76

LR4.

e. Readjust 22-turn (YTX Linearity) potentiometer

A6AlOR76

LR4 clockwise to maximize the displayed signal responses at

the high end of the band.

f. Readjust

A6A12R82

E and

A6AlOR76

LR4 as necessary to

maximize the displayed signal responses from 18.6

GHz

22.0

GHz

on the spectrum analyzer display.

Gradually readjust (Band E Lower Segment) A6AllR60 El

and (Band E Upper Segment) A6AllR78 E2 as necessary for

maximum flatness of the displayed signal responses.

On the spectrum analyzer, key in SWEEP

@KEEJ

(SWEEP TIME]

150s TRACE A

(BLANJ

TRACE B

CMAX],

ISAVE)

6, TRACE B

[CLEAR-WRITE],

ISAVE)

LHOLD).

Press SWEEP

cm]

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 18.6

GHz

to 22.0

GHz,

the spectrum analyzer frequency response should be displayed as

TRACE B.

On the spectrum analyzer, key in

(‘14,

IHOLD)

and repeat

steps 152 through 154 as necessary.

On the spectrum analyzer, key in

(jjj

5 and wait for the

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

Off.

On the spectrum analyzer, key in

[jJ

[GHz)

and

use the DATA knob to gradually change the PRESELECTOR DAC

setting from 32, maximizing the level of the TRACE A displayed

signal responses at the lowest point on the TRACE B waveform.

Note the PRESELECTOR DAC setting.

On the spectrum analyzer, key in

(j-1

[m]

and enter in the PRESELECTOR DAC setting from step 158.

Press SWEEP

(SINGLE)

and wait for the sweep to complete (150

seconds) and the SWEEP LED to turn off.

Repeat steps 158 and 159 until the level of the lowest point on

the TRACE B waveform does not change. Repeat step 159 with a

PRESELECTOR DAC value of 30 and 34.

On the spectrum analyzer, key in TRACE B (VIEW), MARKER

@ZiZZYQ

and use the DATA knob to position a marker on the

lowest point

the TRACE B waveform. Then, press MARKER

(ZJ,

MARKER (PEAK SEARCH) to position a second marker on

the highest point on the TRACE B waveform. Note the total

peak-to-peak deviation of the displayed trace.

Band E total peak-to-peak deviation:

On the spectrum analyzer, press MARKER

(j-1

and note the

frequency of the highest point on the TRACE B waveform.

Band E highest point:

GHz

Repeat steps 156 through 162 if necessary until the total

peak-to-peak deviation of the TRACE B waveform is less than

3.200

Adjustments

1 2 ... 335 336 337 338 339 340 341 342 343 344 345 ... 404 405

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