Preliminary Information
AC Electrical Characteristics
†
- MH88422-3
Characteristics
1
2
3
Return Loss at 2-Wire
(370Ω + 620Ω // 310nF)
Longitudinal to Metallic Balance
50
Idle Channel Noise
at 2-Wire
at VX
4
Transmit Gain (2-Wire to Vx)
-1.4
5
Frequency Gain
(relative to gain @ 1kHz)
-1.6
-2.1
-0.4
-1.3
-0.5
0.9
0.4
0.9
dB
dB
dB
Nc
-80
-80
-70
-68
dBmp
dBmp
60
dB
Sym
RL
MH88422
Min
16
Typ
‡
20
Max
Units
dB
Test Conditions
Test circuit as Fig 7
200-4000Hz
Test circuit as Fig 8
300-3400Hz
Test circuit as Fig 5
Input 0.5V @ 1kHz
Off-Hook
300Hz
3400Hz
†AC Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡Typical figures are at 25°C with nominal +5V and are for design aid only.
Note 1: All of the above test conditions use a test source impedance which matches the device’s impedance.
AC Electrical Characteristics
†
- MH88422BD-1
Characteristics
1
Return Loss at 2-Wire
(220Ω + 820Ω // 115nF)
Sym
RL
Min
16
Typ
‡
22
Max
Units
dB
Test Conditions
Test circuit as Fig 7
300-3400Hz
Ref ZV5 Sec 2.5.2 and
2.8.3
Test circuit as Fig 8
50-300Hz
300-600Hz
600-4000Hz
Ref ZV5 Sec 2.8.2
2
Longitudinal to Metallic Balance
30
40
46
65
60
60
dB
dB
dB
3
Idle Channel Noise
at 2-Wire
at VX
Nc
-84
-75
-1.4
-0.4
-1.3
-0.5
-70
-70
0.9
-0.4
0
dBmp
dBmp
dB
dB
dB
Test circuit as Fig 5
Input 0.5V @ 1kHz
Off-Hook
300Hz
3400Hz
4
Transmit Gain (2-Wire to Vx)
5
Frequency Gain
(relative to gain @ 1kHz)
-1.6
-1.2
†AC Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡Typical figures are at 25°C with nominal +5V and are for design aid only.
Note 1: All of the above test conditions use a test source impedance which matches the device’s impedance.
2-21
MITEL [ MITEL NETWORKS CORPORATION ]
