Agilent Technologies 35670-90066 manual •Press the following keys

Models: 35670-90066

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Agilent 35670A

Adjusting the Analyzer

 

To adjust the ADC gain, offset and reference

Press the following keys:

[ System Utility ]

[ MORE ]

[ SERVICE TESTS ] [ ADJUSTMTS ]

[ ADC ADJUSTMNT ] [ OFFSET ]

Wait for the analyzer to set up the adjustment. The analyzer is ready when the adjustment message appears on the screen.

If the oscilloscope display looks like the following figure, go to step 17. The following describes the signals shown on the oscilloscope display:

‘’A’’ A straight, horizontal trace in the upper half of the display. ‘’B’’ A “noisy” flat trace at the center of the sine wave trace. ‘’C’’ A clean sine wave in the lower half of the display.

A

B

C

R431 and R405 Correctly Adjusted

If trace ‘’B’’ is not flat, adjust A5 R431.

If trace ‘’C’’ is not centered over trace ‘’B,’’ adjust A5 R405.

Set the power switch to off ( O ).

Disconnect the jumper from A5 TP8 and A5 TP300. Reconnect the cable to A5 P4.

5-9

Page 257
Image 257
Agilent Technologies 35670-90066 manual •Press the following keys