Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 323)

2 1. Frequency Response Adjustments

set to internal leveling, which introduces minor leveling errors but

permits much faster sweep times.

40. Repeat steps 33 through 39 as necessary until the total

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

1.20

dB.

Leave the TRACE B reference waveform in VIEW for

steps 33 through 36 to indicate which portions of the frequency

response waveform require relative adjustment.

If necessary, change the value of factory-select component

A6AlOR2

to shift the Band A frequency breakpoint determining

the adjustment ranges of A6AllR48 Al and A6AllR66 A2. A

decrease in the value of

A6AlOR2

shifts the Band A frequency

breakpoint higher in frequency, widening the Band A Lower

Segment and narrowing the Band A Upper Segment. Conversely,

an increase in the value of

A6AlOR2

shifts the Band A

frequency breakpoint lower in frequency. See

Table

3-3 for the

acceptable range of values for

A6AlOR2,

and

Table

3-4 for HP

part numbers. See Figure 3-90 for the location of

A6AlOR2.

41. On the synthesized sweeper, key in Icw) 100 MHz,

(jjj

LEVELING.

42. On the spectrum analyzer, key in

[mj

8, MARKER

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

100 MHz signal.

43.

44.

45.

With the RF Section front-panel AMPTD CAL control still set to

the approximate center of its adjustment range, readjust 17-turn

potentiometer (Band A Step Gain)

A6AlOR21

GA to adjust the

amplitude of the displayed 100 MHz marker to -10.00

dBm

fO.O1

dB.

Adjust

A6AlOR21

GA counterclockwise to increase the

signal level, and clockwise to decrease the signal level.

For

A6AlO

Miscellaneous Bias/Relay Driver Assembly, HP

P/N

85660-60322 (HP

85660A/B

RF Sections with serial number prefix

2747A or above):

A6AlOR21

GA does not have sufficient range to adjust the

amplitude of the 100 MHz displayed signal to -10.00

dBm,

change the value of factory-select component

A6AlOR86.

Increase the value of

A6AlOR86

to decrease the signal level, and

decrease the value of

A6AlOR86

to increase the signal level. See

Table 3-3 for the acceptable range of values for

A6AlOR86,

and

‘Iable

3-4 for HP part numbers. See Figure 3-90 for the location

A6AlOR86.

On the synthesized sweeper, key in

LEVELING, RF (OFF).

Disconnect the power splitter from the spectrum analyzer RF

INPUT.

On the power meter, press

LRANGE

HOLD] (turning it off).

Disconnect the power meter rear panel RECORDER OUTPUT

from the synthesized sweeper front panel LEVELING EXT

INPUT.

Adjustments

3-l

1 2 ... 318 319 320 321 322 323 324 325 326 327 328 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 323

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