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參數(shù)資料
| 型號(hào)： | MH89791 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | CEPT PCM 30 Transmit Equalizer Advance Information |
| 中文描述： | 優(yōu)稅30日發(fā)射的PCM信息均衡進(jìn)展 |
| 文件頁(yè)數(shù)： | 1/4頁(yè) |
| 文件大?。?/td> | 119K |
| 代理商： | MH89791 |
4-219
Features
Used with the MH89790B
Programmable equalization for different line
lengths
6dB loop around circuit
Description
The MH89791 is a programmable network for use
with a PCM 30 line interface, specifically the
MH89790B on The ISDN EXPRESS Card. The
MH89791 contains transmit equalizer and a 6 dB
pad, for external loop around, with 120
input and
output impedances. It is fabricated in thick film
hybrid technology and is 2 inches high by 0.5 inches
wide. The MH89791 is designed to interface to 22
gauge/.6 mm twisted pair. Figure 1 shows how the
MH89791 is connected to the transmit side of a PCM
30 interface. The seven switches control the
distance settings of the equalizer. Ti, Ri, TL, and RL
are the inputs and outputs of the 6 dB pad. The 4
pole double throw relay connected to the transformer
inputs and outputs shows how the transmit signal is
switched between the equalizer for normal operation,
and the 6dB pad for loop around. Figure 2 shows the
circuit description of the MH89791 while Figure 3
shows the switch settings for the Tx equalizer.
Figure 1 - Connection Diagram
MH89791
MH89790B
OUTA
OUTB
RxT
RxR
+12V
L1
C2
.8:
.8:
:1
:0.5
S1
S2
S3
S4
S5
S6
S7
EIT
EIR
EA
EB
EC
SW
RCLT
RCHT
RCLR
RCHR
Ti
Ri
TxT
TxR
TL
RL
C2 = .47
μ
F
L1 = 33
μ
H
1:
1:
ISSUE 4
May 1995
Ordering Information -40°C to 85°C
MH89791
20 Pin SIP Hybrid
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TL
TL
TI
Ri
RL
RL
TxT
EIT
EA
L1
EB
EC
L2
RCHT
RCLT
TxR
EIR
SW
RCHR
RCLR
Pin Connections
MH89791
CEPT PCM 30 Transmit Equalizer
Advance Information
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MH89792-1 | E1 Transceiver Preliminary Information |
| MH89792 | E1 Transceiver Preliminary Information |
| MH89792-2 | E1 Transceiver Preliminary Information |
| MH89792-3 | E1 Transceiver Preliminary Information |
| MH89793 | E1 Transceiver with Selectable Impedance Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MH89792 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
| MH89792-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
| MH89792-2 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
| MH89792-3 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
| MH89793 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver with Selectable Impedance Preliminary Information |
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