Fluke 6060B Instruction Manual page 147

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g
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PROCEDURE
The UUT PLL loop is disabled to cause the VCO frequency to be at the upper limit of its
range, then R I04 is adjusted for 530 MHz.
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a. Remove the instrument and module plate top covers.
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c. Program the UUT to [RCL] [9][8]; then, program the UUT for 500 M Hz
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d. Using a clip lead, short TPI4 to ground to cause the VCO to go to the upper
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5.
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TEST EQUIPMENT
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Frequency Counter
OMM
REMARKS
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This adjustment is normally not required unless components in the 800-M Hz oscillator
are replaced or the Generator has been subjected to severe usage.
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PROCEDURE
I The PLL control voltage operating point is adjusted to 16V while the loop is phase­
locked.
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b. Program the UUT to [RCL] [9][8]; then, program 200 MHz.
c. Connect the D M M to measure voltage between TP53 and the chassis.
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d. Adjust C206 for 16.0V
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6. 10 MHz Lock-Range Centering Adjustment
TEST EQUIPMENT
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Frequency Standard
Low Frequency Synthesized Signal Generator (LFSSG)
Oscilloscope
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BNC Tee
REMARKS
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The UUT reference output and the LFSSG signal are viewed simultaneously on the
oscilloscope for frequencies near the limit of the lock-in range. The I 0-MHz crystal
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Connect UUT RF OUTPUT to the Frequency Counter input.
and + 1 3 dBm.
frequency limit.
Remove the instrument and the module plate top covers .
±
0.5V.
MAINTENANCE
CALIBRATION AOJUSTMENTS
4C-15