Tektronix 3A9 Instruction Manual page 16

10A
na 4 O w
Sy
o
Ci k e )
T
b i t e
a 1 o w
t
1 Hz
2 3 4 5 6 3 4 #5 6 7 8B
10 Hz
1 0 0 Hz
1 k H z
Fig. 2-7. Low Frequency characteristics at various current levels.