Check Gain Accuracy - LeCroy AP034 Instruction Manual

A. Check Gain Accuracy
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1. From the oscilloscope display, select the channel that the
AP034 is connected to (channel 1), then select the
"Coupling" menu. Set the Coupling to DC 1 MΩ. (If the only
choice available is AC 1 MΩ, remove the Plug-on AC
Coupling adapter from the probe tip.)
2. If necessary, set the probe offset to 0.000 V by rotating the
O knob in the CHANNEL section of the oscilloscope.
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3. Using a BNC female-to-female adapter, connect one end of
a BNC cable to the probe end of the ProBus Extension
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end of the BNC cable.
4. Connect one end of a second BNC cable to the output of the
Function Generator. Attach the BNC-to-dual-male banana
plug adapter to the free end of the second BNC cable.
Connect the banana plugs to the Digital Multimeter (DMM).
5. Set the DMM to measure AC Volts.
6. Set the mode of the Function Generator to Sine Wave; the
frequency to approximately 1 kHz; and the output amplitude
to approximately 200 mV rms, as measured by the DMM.
7. Record the measured amplitude to 100 µV resolution in the
Test Record.
8. Unplug the output cable from the DMM. Remove the BNC-to-
banana plug adapter from the end of the cable.
9. Autobalance the AP034 by pressing the AUTOBALANCE
menu button located in the "Coupling" menu.
10. Carefully align the four pins that correspond to the
Differential Drive No Termination portion of the AP03x-
CF01 Calibration Fixture with the input receptacles in the
AP034 probe head. Press the probe into the fixture to fully
engage the pins.
11. Connect the banana plugs of the precision terminator to the
digital multimeter (DMM).
ISSUED: January 2000
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AP034-OM-E Rev D