Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 282)

16. YTO Loop Adjustments

running

.._..........^_.._..._.....................................~.......~.................

~__

_.._.........._.....~-~-.~..............................................-..............!

200

mV/div

~offset~-300.0

liv

,......,...,..,.,,,

.,,.,..

..---...-..-..............--.....-.-.....

.._.

_............._...__...-

..-......

0.00000 s

10.0000

IIS

20.0000

2.00

rs/div

VrarkerPC

)

275.000mV

VmarkerlC

-712.500nV

delta

9a7.500nv

4 f-3.000 v

Figure 3-74. Sampler Waveform at

AllA5TPl

37. Adjust

AllA5Cl

for a minimum voltage level at the 210 MHz

(right) marker. Readjust AllA5C2 to make the voltages at the

160 MHz (left) and 210 MHz (right) markers equally negative.

Carefully readjust

AllA5Cl

and AllA5C2 as necessary for

maximum flatness and lowest possible voltage of the displayed

waveform between the 160 MHz and 210 MHz markers.

38. On the oscilloscope, press

CaTav],

and turn on the voltage markers

for the Channel 1 input. Place one voltage marker at the level

of the 160 MHz (left) and 210 MHz (right) markers, and place

the second voltage marker at the maximum voltage level of

the displayed waveform, as shown in Figure 3-74. The voltage

level of the displayed waveform between the 160 MHz and 210

MHz markers should be a minimum of 0.50 Vdc lower than the

maximum voltage level.

39. Disconnect the oscilloscope’s Channel 1 input from

AllA5TPl

SAMPLER DC.

40. On the spectrum analyzer (DUT), note the fourth line of numerical

data appearing in the upper left corner of the spectrum analyzer

CRT; this is the g-digit M/N Loop Frequency, ranging from 177.500

000 MHz to 197.419 355 MHz. Note the currentlyselected M/N

Loop Frequency (corresponding to the minimum power YTO Start

Frequency from step 25).

3-142 Adjustments

1 2 ... 277 278 279 280 281 282 283 284 285 286 287 ... 404 405

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Agilent Technologies HP 8566B Spécifications Page 282

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