Ds1875 pon triplexer and sfp controller – Rainbow Electronics DS1875 User Manual
Page 78
DS1875
PON Triplexer and SFP Controller
78
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Table 02h, Register BCh: HTXP
FACTORY
DEFAULT
00h
READ
ACCESS PW2
WRITE
ACCESS PW2
MEMORY TYPE
Nonvolatile (SEE)
BCh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
Fast comparison DAC threshold adjust for high TXP. This value is added to the APC DAC value recalled from
Table 04h. If the sum is greater than 0xFF, 0xFF is used. Comparisons greater than V
HTXP
, compared against
V
BMD
, create a TXP HI alarm. The same ranging applied to the APC DAC should be used here.
V
HTXP
=
Full Scale
255
HTXP
+ APC DAC
(
)
Table 02h, Register BDh: LTXP
FACTORY
DEFAULT
00h
READ
ACCESS PW2
WRITE
ACCESS PW2
MEMORY
TYPE Nonvolatile
(SEE)
BDh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
Fast-comparison DAC threshold adjust for low TXP. This value is subtracted from the APC DAC value recalled
from Table 04h. If the difference is less than 0x00, 0x00 is used. Comparisons less than V
LTXP
, compared
against V
BMD
, create a TXP LO alarm. The same ranging applied to the APC DAC should be used here.
V
LTXP
=
Full Scale
255
APC DAC LTXP
(
)