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