MH88437-P
-V
Advance Information
10H 500
Ω
11
3
Vs
4
5
21
22
23
82K
24
25
LOOP
VR+
VR-
DUT
VX
VLOOP5
VLOOP4
VLOOP3
VLOOP2
VBIAS
VLOOP1
LC RV AGND VCC ZA
9
6
16 8
7
4.7K
10
+
10uF
RING
27
NB2
2
16K
Zin
13
RS
15
LCD
28
TIP
NB1
1
I=20mA
100uF
+
100uF
+
10H 500
Ω
1K
5V
5V
Gain = 20 * Log (V(Zin) / Vs)
=
Ground (Earth)
Figure 8 - Test Circuit 3
-V
10H 500
Ω
11
LOOP
3
VR+
4
5
21
22
23
82K
24
25
VR-
DUT
VX
VLOOP5
VLOOP4
VLOOP3
VLOOP2
10
VBIAS
VLOOP1
10uF
LC RV AGND VCC ZA
+
9
6
16 8
7
4.7K
RING
27
10H 500
Ω
+
NB2
2
300
Ω
100uF
16K
13
RS
15
LCD
28
TIP
NB1
1
V1
300
Ω
Vs = 0.5V
I=20mA
100uF
+
Zin
1K
5V
5V
Return Loss = 20 * Log (V1 / Vs)
=
Ground (Earth)
Figure 9 - Test Circuit 4
12