Appendix B - Functional Description
150-412-107-03, Revision 03
24
November 19, 1999
HRU-412 List 7
If local power is lost to an HRU-412 List 7, the last span loses sync. When the
HLU or HDU attempts to reestablish sync, it detects that the HRU-412 is not
locally powered and applies line power to the HRU. The HRU-412 then
powers up and operates normally if within range to support line powering.
The -48 Vdc local power supply must have a 105 mA output current capacity
(5 W) to power each HRU-412 List 7 when the I-CPE option is set to 0 mA.
The -48 Vdc local power supply must have a 145 mA output current capacity
(7 W) to power each HRU-412 List 7 when the I-CPE option is set to 60 mA.
A Teltrend WPS-2005 Wall-Mount Power Supply, or equivalent, is capable
of powering two HRU-412 List 7 units with the I-CPE option switch set to 0
mA or one HRU-412 List 7 with the I-CPE option switch set to 60 mA.
The HRU-412 List 7 can be used in limited (2000
) and unlimited (full
CSA) three-span line powering applications. The line units and doublers that
are compatible with limited and unlimited line powering are shown below:
Unlimited: full CSA range on all spans
•
Line units: HLU-231 List 8x; HLU 319 List 5x; HLU-388 List 5x
•
Doublers: HDU-409; HDU-407; HDU-404.
Limited: 2000
range
•
Line units: HLU-231 List 8x; HLU-231 List 7D; HLU-431 List 1D;
HLU-319 List 5X; HLU-388 List 5X
•
Doublers: HDU-409; HDU-407; HDU-404; HDU-439; HDU-437.
For more information on doublers, see the technical practices for the HiGain
Mini Doublers and the HiGain Micro Doubler.
The HRU-412 List 7 supports up to three spans (with the use
of two doublers).
Содержание HIGAIN HRU-412
Страница 4: ...Inspecting the Shipment 150 412 107 03 Revision 03 iv November 19 1999 HRU 412 List 7 ...
Страница 36: ......