MH88435-P
-V
= Ground (Earth)
11
LOOP
3
VR+
Vs
4
5
21
22
VR-
MH88435
VX
SC
SC
RING
360K
24
25
VLOOP2
VBIAS
VLOOP1
LC RV AGND VCC ZA
9
6
16 8
7
4.7K
10
10uF
27
NB2
2
15K
13
RS
15
LCD
28
TIP
NB1
1
Preliminary Information
10H 500
Ω
I=20mA
100uF
+
Zin
100uF
+
10H 500
Ω
1K
5V
5V
Gain = 20 * Log (V(Zin) / Vs)
Figure 8 - Test Circuit 3
-V
= Ground (Earth)
11
LOOP
3
VR+
4
5
21
22
VR-
MH88435
VX
SC
SC
RING
360K
24
25
VLOOP2
10
VBIAS
VLOOP1
LC RV AGND VCC ZA
9
6
16 8
7
4.7K
10uF
27
10H 500
Ω
+
NB2
2
300
Ω
100uF
15K
13
RS
15
LCD
28
TIP
NB1
1
V1
300
Ω
Vs = 0.5V
10H 500
Ω
I=20mA
100uF
+
Zin
1K
5V
5V
Return Loss = 20 * Log (2V1 / Vs)
Figure 9 - Test Circuit 4
2-50