AN589

4/8

MEASUREMENTS

Figure 5. Measurement circuits

The measurements have been done in the Figure 5 configuration. Three cases have been taken into ac-

count:

– DRIVER 2 output at -12 V (see Figure 6)

– DRIVER 2 output at O V (see Figure 7)

– DRIVER 2 output at +12 V (see fig.8)

Figure 6. Ve/VR with DRIVER 2 voltage = -12 V

0/- 12V

Driver 2

Receiver 1

500

3K

+/- 12V

Driver 2

Receiver 1

500

3K

2

3

1-20

10-11

19

18

ITA25B3

Chanel 1

20

s 5V

Chanel 2

20

s 5V

Ch 1

5 V ~

T/div20

Trig

1.20 div+CHAN 1 =

100

0

5V/Div

0

5V/Div

Ve

Vr

20

s/div