artisan 8640B - VT Voltage Adjustment

To Next Page

To Previous Page

Model 8640B TM 9-4935-601-14-7&P

ADJUSTMENTS

5-35. V

POT (A3R1) ADJUSTMENT (Cont'd)

1. Set FREQUENCY TUNE full clockwise.

2. Tighten the bushing and set VT pot shaft full cw.

3. Install pot with gear in casting so that center terminal (934 wire) is in line with casting setscrew (see Figure 5-

3,A).

4. Tighten setscrews in gear (not casting setscrew).

5. Rotate the pot cw so that casting setscrew lies between first and center terminals of pot (see Figure 5-3,B).

6. Tighten casting setscrew.

7. Perform the VT Voltage Adjustment, paragraph 5-36.

5-36. VT VOLTAGE ADJUSTMENT

REFERENCE:

Service Sheets 5, 10, and 11.

DESCRIPTION:

This procedure should be performed whenever either the VT pot, the A3 assembly, or the A10A2 assembly has been

replaced.

PROCEDURE:

1. Set Signal Generator's controls as follows:

Meter Function..........................................................................................LEVEL

COUNTER MODE: EXPAND ..........................................................................Off

LOCK..............................................................................................................Off

Source ...........................................................................................................INT

AM................................................................................................................OFF

FM ................................................................................................................OFF

RANGE.........................................................................................256 - 512 MHz

FREQUENCY TUNE.........................................................................As specified

FINE TUNE............................................................................................Centered

OUTPUT LEVEL........................................................................................0 dBm

RF ON/OFF ....................................................................................................ON

5-22

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com