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4
Calibration Procedures
Frequency (Internal Timebase) Adjustment
The function generator stores a calibration constant that sets the VCXO to output
exactly 10 MHz.
1 Set the frequency counter resolution to better than 0.1 ppm and the input
2 Use a frequency counter to measure the output frequency for each setup in the
3 Using the numerical keypad or knob, adjust the displayed frequency at each
4 After performing setup 5:
86
termination to 50 Ω (if your frequency counter does not have a 50 Ω input
termination, you must provide an external termination). Make the connections
shown below.
following table.
Setup
Frequency
2
<10 MHz
3
>10 MHz
4
~10 MHz
[a]
10 MHz
5
[a] Constants are stored after completing this setup.
setup to match the measured frequency. Select ENTER VALUE.
Nominal Signal
Amplitude
1 Vpp
1 Vpp
1 Vpp
1 Vpp
Output frequency is slightly less than 10MHz
Output frequency is slightly more than 10MHz
Output frequency should be near 10MHz
Output frequency should be 10MHz ±1ppm
Keysight 33210A Service Guide
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