Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 334)

2 1. Frequency Response Adjustments

3.40

dB.

See the TRACE B reference waveform to indicate which

portions of the frequency response waveform require relative

adjustment. 113. On the spectrum analyzer, key in

(ml

m).

113. On the synthesized sweeper, press

Icw)

and enter the frequency

recorded in step 111, 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.

114. 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 C Step Gain)

potentiometer

A6AlOR25

GC to adjust the-amplitude of the

’

marker to -10.00

dBm

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

deviation)

f0.01

dB.

Adjust

A6AlOR25

GC counterclockwise to

increase the signal level, and clockwise to decrease the signal

level.

Note

A6AlO

Miscellaneous Bias/Relay Driver Assembly is HP

P/N

85660-60322 (HP 85660AB RF Sections with serial number prefix

2747A or above), and

A6AlOR25

GC does not have sufficient range,

change the

value

of factory-select component

A6AlOR88.

Increase

the

value

A6AlOR88

to decrease the signal level, and decrease the

value of

A6AlOR88

to increase the signal level. See

‘Ihble

3-3 for the

acceptable range of values for

A6AlOR88,

and

‘Iable

3-4 for HP part

numbers. See Figure 3-90 for the location of

A6AlOR88.

Band

12.5

18.6

GHz

115. On the spectrum analyzer, key in

[WI,

(SHIFT)

(PRESEL

PEAK)

, (SHIFT) TRACE A

(jhnAx)

Set the spectrum analyzer

controls as follows:

START FREQ

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

.12.5

GHz

STOP FREQ

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

18.6

GHz

RES BW

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

MHz

REFERENCE LEVEL

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

-7

dBm

LOG SCALE

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

10 dB/DIV

SWEEP TIME

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

500 ms

116. On the synthesized sweeper, key in

15.0

GHz.

Note

The POWER LEVEL of the synthesized sweeper should still be leveled

to a calibrated -10.00

dBm

at 100 MHz at the spectrum analyzer RF

INPUT from step 55.

117.

118.

Adjust 22-turn (IF Offset) potentiometer

A6A12R83

D and

17-turn (YTX Bias) potentiometer

A6AlOR12

VD for maximum

signal amplitude at 15.0

GHz

on the spectrum analyzer display.

See Figure 3-90 for the locations of

A6A12R83

D and

A6AlOR15

VD.

On the spectrum analyzer, key in MARKER (NORMAL),

MARKER

[PEAKSEARCH)

to position a marker at the peak of

3-194 Adjustments

1 2 ... 329 330 331 332 333 334 335 336 337 338 339 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 334

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