Keysight U8903B, Руководство пользователя

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Test Sequence Application 7
Keysight U8903B User’s Guide 329
Table 7-25 THD+N > Signal Analysis settings menu description
Menu Description
Freq Lock
Press the Freq Lock softkey to select the searching method for the fundamental frequency.
– Auto
Selecting Auto will allow the U8903B to search for the fundamental frequency automatically.
– Gen Lock
Selecting Gen Lock will allow the U8903B to search for the fundamental frequency based on the generator frequency
value of the respective generator channel. This Gen Lock method is only useful if you use the internal audio generator.
– Custom
If you have a known input signal, you can define the fundamental frequency value by setting the searching method to
Custom and setting the frequency value in Fund Freq .
Fund Freq
Press the Fund Freq softkey to set the fundamental frequency value. This setting is only available when Freq Lock is set to
Custom.
Harmonics
Press the Harmonics softkey to select the harmonics count to be used in the THD ratio and THD level results.
– All
– 2 to 9
LPF
Press the LPF softkey to select the low-pass filter.
– None
– 2 kHz
– 3 kHz
– 5 kHz
– 8 kHz
– 10 kHz
– 15 kHz
– 20 kHz
– 22 kHz
– 30 kHz
– 40 kHz
– 50 kHz
– 80 kHz
– Custom
HPF
Press the HPF softkey to select the high-pass filter.
– None
– 15 Hz
– 20 Hz
– 22 Hz
– 30 Hz
– 50 Hz
– 70 Hz
– 100 Hz
– 200 Hz
– 300 Hz
– 400 Hz
– Custom