Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 329)

81.

82.

83.

84.

85.

86.

87.

88.

Frequency Response Adjustments

On the spectrum analyzer, key in

[=I

IGHz)

/ 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

L-1

LSHIFT)

(GHz)

and enter in the PRESELECTOR DAC setting from step 81.

Press SWEEP (SINGLE) and wait for the sweep to complete (150

seconds) and the SWEEP LED to turn off.

Repeat steps 81 and 82 until the level of the lowest point on

the TRACE B waveform does not change. Repeat step 82 with a

PRESELECTOR DAC value of 30 and 34.

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

(NORMAL_)

and use the DATA knob to position a marker on the

lowest point on the TRACE B waveform. Then, press MARKER

Ln],

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 B total peak-to-peak deviation:

On the spectrum analyzer, press MARKER

@ZZiXj

and note the

frequency of the highest point on the TRACE B waveform.

Band B highest point:

GHz

Repeat steps 79 through 85 if necessary until the total

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

3.40

dB.

See the TRACE B reference waveform to indicate which

portions of the frequency response waveform require relative

adjustment.

On the spectrum analyzer, key in

(RECALL)

IHOLD).

On the synthesized sweeper, press

[cw)

and enter the frequency

recorded in step 85, positioning the displayed TRACE A signal

response at the highest point on the TRACE B waveform.

Note

The RF Section front-panel AMPTD CAL control should still be set to

the approximate center of its adjustment range from step 26.

Note

89. On the spectrum analyzer, key in MARKER

(j-1,

MARKER

[PEAK SEARCH) to position a marker at the peak of the displayed

TRACE A signal response. Adjust 17-turn (Band B Step Gain)

potentiometer

A6AlOR23

GB to adjust the amplitude of the

marker to -10.00

dBm

+ (l/2 of Band B total peak-to-peak

deviation)

f0.01

dB.

Adjust

A6AlOR23

GB counterclockwise to

increase the signal level, and clockwise to decrease the signal

level.

If the

A6AlO

Miscellaneous Bias/Relay Driver Assembly is HP P/N

85660-60322 (HP

85660A/B

RF Sections with serial number prefix

2747A or above), and

A6AlOR23

GB does not have sufficient range,

change the value of factory-select component

A6AlOR87.

Increase

the value of

A6AlOR87

to decrease the signal level, and decrease the

value of

A6AlOR87

to increase the signal level. See

‘Iable

3-3 for the

Adjustments 3-189

1 2 ... 324 325 326 327 328 329 330 331 332 333 334 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 329

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