IDT82P2281 Datasheet, PDF (133/375 Pages) Integrated Device Technology – Single T1/E1/J1 Long Haul Short Haul Transceiver

IDT82P2281
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
T1/J1 Receive Configuration 1 (029H)
Bit No.
Bit Name
Type
Default
7
Reserved
6
EQ_ON
R/W
0
5
Reserved
4
LOS4
R/W
1
3
LOS3
R/W
0
2
LOS2
R/W
1
1
LOS1
R/W
0
0
LOS0
R/W
1
EQ_ON:
= 0: The Equalizer is off in short haul applications.
= 1: The Equalizer is on in long haul applications.
LOS[4:0]:
A LOS is detected when the incoming signals has “no transitions”, i.e., when the signal level is less than Q dB below nominal for N consecutive
pulse intervals. In long haul applications, these bits select the LOS declare threshold (Q). These bits are invalid in short haul applications.
LOS[4:0]
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
LOS Declare Threshold (Q)
-4 dB
-6 dB
-8 dB
-10 dB
-12 dB
-14 dB
-16 dB
-18 dB
-20 dB
-22 dB
-24 dB
-26 dB
LOS[4:0]
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110 -
11111
LOS Declare Threshold (Q)
-28 dB
-30 dB
-32 dB
-34 dB
-36 dB
-38 dB
-40 dB
-42 dB
-44 dB
-46 dB
-48 dB
Programming Information
122
October 7, 2003