Measz Calibration - Fluke 5520A Service Manual

5520A
Service Manual
3. Set the DSO to these parameters:
4. Press the GO ON blue softkey.
5. Adjust the DSO horizontal scale and main time base position until the pulse signal
6. If prompted to adjust the pulse width by the Calibrator Mainframe display, adjust the
7. Allow the DSO width reading to stabilize. Enter the reading via the Calibrator
The Calibrator Mainframe issues a warning when the entered value is out
of bounds. If this warning occurs, recheck the setup and carefully re-enter
the reading with the proper multiplier (i.e., m, u, n, p). If the warning still
occurs, enter a value between the displayed pulse width and the previously
entered value. Keep attempting this, moving closer and closer to the
displayed pulse width, until the value is accepted. Complete the pulse width
calibration procedure. The pulse width calibration procedure must now be
repeated until all entered values are accepted the first time without
warning.
8. Repeat steps 5 to 7 until the Calibrator Mainframe display prompts to connect a

6-42. MeasZ Calibration

The MeasZ function is calibrated using resistors and a capacitor of known values. The
actual resistance and capacitance values are entered while they are being measure by the
Calibrator Mainframe.
The resistors and capacitor must make a solid connection to a BNC(f) to enable a
connection to the end of the BNC cable supplied with the SC600. The resistance and
capacitance values must be known at this BNC(f) connector. Fluke uses an HP 3458A
DMM to make a 4-wire ohms measurement at the BNC(f) connector to determine the
actual resistance values and an HP 4192A Impedance Analyzer at 10 MHz to determine
the actual capacitance value.
This procedure uses the following equipment:
Refer to Figure 6-5 for setup connections.
6-26
Main Time Base position (initial): 40 ns
Vertical scale:
Trigger:
Measurement Function:
spans between half and the full display. If no pulse is output, increase the pulse width
using the Calibrator Mainframe front panel knob until a pulse is output.
pulse width to as close to 4 ns as possible using the Calibrator Mainframe front panel
knob, then press the GO ON blue softkey.
Mainframe front panel keypad, then press ENTER.
resistor. Press the OPTIONS, then STORE CONSTS blue softkeys to store the new
calibration constants.
Resistors of known values: 1M and 50
adapters to connect resistors to BNC(f) connector
adapters and capacitor to achieve 50 pF nominal value at the end of BNC(f)
connector
BNC cable supplied with the SC600
200 mV/div, +900 mV offset
source = ext; level = 0.5 V; ext atten = x10; slope = +;
mode = auto
positive width
Note
nominal