Adjust Final Attenuator Compensation (C17) - LeCroy AP034 Instruction Manual

F. Adjust Final Attenuator Compensation (C17)
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6. Record the DMM reading. Be careful not to alter the output
amplitude of the generator after the measured value has
been recorded
7. Remove the banana plug adapter and connect the free end
of the cable to the Differential Drive no Termination
connector on the calibration fixture.
8. Connect the AP034 Output cable with 50 Ω Precision
termination to the DMM.
9. Using a low capacitance screwdriver, adjust GAIN (R322C)
so that the DMM reading is within ±1 mV (0.5%) of the
reading recorded in step E-6. (See Figure 10 for
adjustment location.)
10. Disconnect the Function Generator, DMM, calibration
fixture, and precision 50 Ω terminator.
The calibrator signal from a LeCroy
oscilloscope is the recommended signal
source for this adjustment. If another
oscilloscope
procedure, make sure that the square
wave source
(minimum overshoot and undershoot.)
1. Press the U button, then select the CAL BNC Setup
TILITIES
menu. Set the mode to CAL signal, Shape to Square,
Amplitude to 1 V into 1 MΩ, and Frequency to 1 kHz.
2. Reconnect the free end of the ProBus Extender BNC cable
to the oscilloscope end of the extender located on
channel 1.
3. Connect a BNC cable from the CAL output BNC connector
to the Differential Drive 50 ohm Termination connector
on the AP033/AP034 Calibration Fixture.
4. Carefully connect
Termination portion of the AP033/AP034 Calibration
ISSUED: January 2000
$3 $FWLYH 3UREH
Note
is being used for
has adequate
the Differential Drive
this
flatness
50 ohm
AP034-OM-E Rev D