BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 156
BT8375
Manufacturer Part Number
BT8375
Description
single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.BT8375.pdf
(323 pages)
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3.7 Receive LIU Registers
3
3.7 Receive LIU Registers
Unused bits indicated by a dash (
effect.
shown are the minimum range of receive signal levels for which the receiver recovers data error-free. The
RALOS detect range lists the range of receive signal levels for which Analog Loss of Signal (RALOS) is
declared after 1 msec. The RLOS detect threshold shows the number of continuously received zeros that cause a
receiver loss of signal condition. For example, for E1 I.431 applications, the receiver declares an RALOS
condition when the receive signal level is –20 dB or less. For E1 G.775 applications, an RLOS condition is
declared if the received signal level remains less than –24 dB for 32 bit periods.
Table 3-9. Receive LIU Register Settings versus Application
3-38
NOTE(S):
(1)
(2)
Table 3-9
Default value.
Register values shown for short-haul applications are also applicable for the Bt8375 and Bt8376 devices.
Application
I.431
G.775
Long Range
Extended Range
G.775
T1.403,
PA62411
I.431
Long Range
Extended Range
(2)
(2)
(2)
details receiver LIU register settings for some typical applications. The sensitivity range values
0 to –6 dB
0 to –6 dB
0 to –34 dB
–20 to –48 dB
0 to –6 dB
0 to –16.5 dB
0 to –18 dB
0 to –34 dB
–20 to –48 dB
Sensitivity
Range
—
) are reserved and should be written to 0. Writing to reserved bits has no
–6 to –20 dB
–9 to –35 dB
< –43 dB
< –48 dB
–9 to –35 dB
––
–18 to –30 dB
< –43 dB
< –48 dB
RALOS Detect
Range
Conexant
––
32 @–24 dB
32 @–43 dB
32 @–48 dB
100 @–24 dB
100 @–30 dB
100 @–30 dB
100 @–43 dB
100 @–48 dB
Continuously
RLOS Detect
Threshold
Received
(No. of
Zeros)
Fully Integrated T1/E1 Framer and Line Interface
0x41
0x41
0x41
0x41
0x41
0x41
0x41
0x41
0x41
Receiver LIU Register Configurations
0xB1
0xB1
0xB1
0xB1
0xB1
0xB1
0xB1
0xB1
0xB1
0x1D
0x1D
0x1D
0x34
0x3F
0x21
0x21
0x34
0x3F
Bt8370/8375/8376
0xBA
0xBA
0xBA
0xBA
0xBA
0xBA
0xBA
0xBA
0xBA
0xDA
0xDA
0xDA
0xDA
0xDA
0xDA
0xDA
0xDA
0xDA
N8370DSE
0xA6
0xA6
0xA6
0xE6
0xA6
0xA6
0xA6
0xA6
0xE6
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