Doubler Ahtiu Applications - ADC HiGain HLU-200 User Manual

Power Parameters
D
OUBLER
One or two doublers may be used in the HDSL loops between the HLU-200
and the HRU. When using two doublers in an HDSL loop, the HRU must be
locally powered. This section discusses HLU-200 operation with the
following doublers:
HDU-451 List 3 and List 4; HDU-439 (all lists) and HDU-437 List 1 mini
doublers; and the HDU-409 (all lists), HDU-407 (all lists), and HDU-404 (all
lists) micro doublers.
The HLU-200 List 1A must not be used with older, higher
powered HDU-451 List 1 or List 2 doublers. The HDU-451 List
3 and List 4 are low-power doublers that consume 40 percent
less power than the List 1 or List 2.
Table 7 lists the current drains on the two CBA power busses and the unit
power consumption and dissipation in doubler applications using the
HDU-451 List 3 and List 4, the HDU-437 or the HDU-439.
page 21 is for doubler applications using the HDU-404, HDU-407, or
HDU-409.
HLU-200 List 1A does not support single-doubler
applications that require the line-powered HRU to provide
60 mA of CPE current to power an external NID. Such
applications exceed the maximum allowed slot current of
360 mA at -48 Vdc.
All single-doubler applications with line-powered HRUs and
all two-doubler applications with locally-powered HRUs
require one empty CBA slot per circuit to ensure that the slot
power dissipation and consumption remains within the
prescribed limits.
20
AHTIU A
PPLICATIONS
October 4, 1999
350-200-111-02, Issue 2
Table 8 on
HLU-200 List 1A