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To calibrate the Frequency function:
1. Set the frequency counter as follows: Frequency Input A, Gate time of 1s, Trigger on positive slope,
AC Coupled, 1 MOhm Input Impedance, Amplitude 3 V.
2. Connect the frequency counter Input A to the Product OUTPUT VZ HI/LO with the BNC cables and
adapters.
3. Set the Product to the Frequency/Amplitude in Table 30. Set to operate. Measure with the
frequency counter and record the counter measured values in the Product Output Measured by
Counter column.
4. Evaluate for compliance to limits. If Guardbanding is to be applied create a table from the example
in this manual, where the acceptance limits are properly modified by your Guardbanding method.
Product
Step
Frequency
1
1000000 Hz
Calibration Adjustment
The Product mainframe has no internal hardware adjustments. The Display prompts you through the
entire calibration adjustment routine. Calibration adjustment occurs in these major steps:
1. The product sources specific output values and you measure the outputs using traceable
measuring instruments of higher accuracy. The product automatically programs the outputs and
prompts you to make external connections to appropriate measurement instruments.
2. At each measure and enter step, you can press the OPTIONS, and BACK UP STEP softkeys to
redo a step, or SKIP STEP to skip over a step.
3. You enter the measured results either manually through the front panel keyboard or remotely with
an external terminal or computer.
There are automatic steps that the Product uses. No operator action is necessary for those
steps.
4. The Product computes a software correction factor and stores it in volatile memory.
5. When the calibration adjustment process is complete, you are prompted to either store all the
correction factors in nonvolatile memory or discard them and start over. All the routine calibration
steps are available from the front panel interface as well as the remote interface (IEEE-488 or
serial). Remote commands for calibration are described in the 5560A/5550A/5540A Remote
Programmers Manual located at flukecal.com.
Table 30. Frequency Calibration
Product Amplitude Product Output Measured by Counter Limits
3 V
Note
Calibrator
Calibration Adjustment
±7.5 Hz
65
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