Calibrator
Mainframe Calibration
43
Table 28. Marker Generator Function Verification (cont.)
Nominal Interval Measured Interval Deviation 1-Year Spec.
500.000 ns 0.013 ns
200.000 ns 5.000 ps
100.000 ns 2.500 ps
50.000 ns 1.250 ps
20.000 ns 0.500 ps
10.000 ns 0.250 ps
5.000 ns 0.125 ps
2.000 ns 0.050 ps
Mainframe Calibration
The standard Product has no internal hardware adjustments. Oscilloscope
Options have hardware adjustments. The Control Display prompts you through
the complete calibration procedure. Calibration occurs in the major steps below:
1. The Product sources specified output values and you measure the outputs
with traceable measurement instruments of higher accuracy. The Product
automatically programs the outputs and prompts you to make external
connections to applicable measurement instruments.
2. At each measure and enter step, you can push the OPTIONS, and BACK UP
STEP softkeys to redo a step, or SKIP STEP to skip over a step.
3. Enter the measured results manually through the front panel keyboard or
through the remote interface with an external terminal or computer.
Note
Mixed in with the "output and measure" procedures are internal
calibration procedures that are done without operator aid.
4. The Product computes a software correction factor and stores it in volatile
memory.
5. When the calibration steps are complete, you are prompted to store all the
correction factors in nonvolatile memory or discard them and start over.
For usual calibration, all steps but frequency and phase are necessary. All the
usual calibration steps are available from the front panel interface as well as the
remote interface (IEEE-488 or serial). Frequency and phase calibration are
recommended after instrument repair, and are available only through the remote
interface (IEEE-488 or serial). Remote commands for calibration are given later.
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