![](/html/Mitel/496458/page11.png)
Preliminary Information
MH88422
-V
+5v
10H 500Ω
DUT
1 VDD
3 AGND
26
TIP
RLS 24
I=20mA
100uF
+
Vs
Gain = 20 * Log (V(Zin) / Vs)
5 LC/
7 RVLC/
9 NC
11 VX
1uF
13 VR
IC 22
TF 20
470nF
V (Zin)
Zin
TXIN 18
RING 16
100uF
+
NC 14
10H 500Ω
Figure 6 - Test Circuit 3
-V
10H 500Ω
+5v
1 VDD
DUT
26
TIP
I=20mA
100uF Zin
+
3 AGND
RLS 24
5 LC/
IC 22
V1
7 RVLC/
9 IC
11 VX
1uF
13 VR
TF 20
470nF
TXIN 18
RING 16
IC 14
100uF
10H 500Ω +
Return Loss = 20 x Log (V1 / Vs)
300Ω
Vs
300Ω
Figure 7 - Test Circuit 4
2-23