Keysight 33210A, Service Manual

Page: 67 / 131

65
Chapter 4 Calibration Procedures
0 dB Range Flatness Verification
4
4
0 dB Range Flatness Verification
This procedure checks the high frequency ac amplitude flatness above
100 kHz on the 0dB attenuator range. (Flatness is relative to 1 kHz.)
1
Connect the power meter to measure the output amplitude of the
instrument as shown below.
2
Set up the function generator as follows:
• Output impedance: 50
Ω
(press and select Output Setup).
• Waveform: Sine
• Frequency: 100 kHz
• Amplitude: 3.51 dBm
Make sure the output is enabled.
3
On the power meter, use the Relative Power function to set the current
reading as the reference value. This will allow you to compare future
measurement results in dB.
4
Set the power meter offset to equal the 100kHz_0dB_offset value
previously calculated. This sets the power meter to directly read the
flatness error specification relative to 1 kHz. 100kHz_0dB_offset is
calculated on the Amplitude and Flatness Verification Worksheet.