Table 7-25 Thd+N > Signal Analysis Settings Menu Description - Keysight U8903B User Manual

Table 7-25 THD+N > Signal Analysis settings menu description
Menu Description
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
Freq 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.
Press the Fund Freq softkey to set the fundamental frequency value. This setting is only available when Freq Lock is set to
Fund Freq
Custom.
Press the Harmonics softkey to select the harmonics count to be used in the THD ratio and THD level results.
Harmonics – All
– 2 to 9
Press the LPF softkey to select the low-pass filter.
– None
– 2 kHz
– 3 kHz
– 5 kHz
– 8 kHz
– 10 kHz
LPF – 15 kHz
– 20 kHz
– 22 kHz
– 30 kHz
– 40 kHz
– 50 kHz
– 80 kHz
– Custom
Press the HPF softkey to select the high-pass filter.
– None
– 15 Hz
– 20 Hz
– 22 Hz
– 30 Hz
HPF – 50 Hz
– 70 Hz
– 100 Hz
– 200 Hz
– 300 Hz
– 400 Hz
– Custom
Keysight U8903B User's Guide
Test Sequence Application 7
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