Page 9 of 10
Measurements
THD at 1 kHz, no load. 50 Hz with harmonics is caused by imperfect wiring which picks up hum.
THD is 0.00014 %, with noise included 0.00061 %.
Bandwith -3 dB is 7 MHz. Input filter 7.2 MHz is populated.
Bandwith -3 dB is approx. 40-50 MHz. Input filter 7.2 MHz is removed. The signal generator goes to 20 MHz and a small peak over 20 MHz is visible.
The risetime is 23.6 ns according to the oscilloscope. The input risetime compared with the output. The risetime is the same or even faster than the signal generator.