MH88422 データシートの表示（PDF） - Mitel Networks
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MH88422 Datasheet PDF : 14 Pages
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MH88422
Preliminary Information
AC Electrical Characteristics† - MH88422-1
Characteristics
Sym Min
Typ‡ Max
Units
Test Conditions
1 Return Loss at 2-Wire
(220Ω + 820Ω //120nF)
RL
20 22
20 24
20 26
Test circuit as Fig 7
dB 300-500Hz
dB 500-2500Hz
dB 2500-3400Hz
2 Longitudinal to Metallic Balance
40 65
55 60
53 60
Test circuit as Fig 8
dB 50-300Hz
dB 300-1000Hz
dB 1000-4000Hz
3 Idle Channel Noise
Nc
at 2-Wire
at VX
-79 -72 dBmp
-73 -58 dBmp
4 Transmit Gain (2-Wire to Vx)
-1.4 -0.4 0.9
Test circuit as Fig 5
dB Input 0.5V @ 1kHz
Off -Hook
5 Frequency Response Gain
-1.6 -0.6 0.4
dB 300Hz
(relative to Gain @ 1kHz)
-2.1 -0.5 0.9
dB 3400Hz
† Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡ Typical figures are at 25C 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† - MH88422-2
Characteristics
Sym Min Typ‡ Max
Units
Test Conditions
1 Return Loss at 2-Wire
(Reference 600Ω)
ERL
20
30
SFRL 14 19
Test circuit as Fig 7
dB 500-2500Hz
dB 200-3200Hz
2 Longitudinal to Metallic Balance
Metallic to Longitudinal Balance
58 60
53 55
60
40
Test circuit as Fig 8
dB 200-1000Hz
dB 1000-3000Hz
Test circuit as Fig 9
dB 200-1000Hz
dB 1000-4000Hz
3 Idle Channel Noise
Nc
at 2-Wire
at VX
13 20 dBrnC
13 20 dBrnC
4 Transmit Gain (2-Wire to Vx)
-1.4 -0.4 0.9
Test circuit as Fig 5
dB Input 0.5V @ 1kHz
Off- Hook
5 Frequency Response Gain
-1.6 -1.3 0.4
dB 200Hz
(relative to Gain @ 1kHz)
-2.1 -0.5 0.9
dB 3400Hz
† Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡ Typical figures are at 25C with nominal +5V supply 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.
2-20
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