Appendix A - Functional Description; Doubler Block Diagram - ADC 2 User Manual

LTPH-UM-1234-01
A
PPENDIX
D
ESCRIPTION
HiGain uses the ADC Two-Binary, One-Quaternary (2B1Q) HDSL
transceiver system to establish two full-duplex 784 kbps data channels
between the HLU, HDU, and HRU units. Each HDU-409 increases the
maximum range by approximately 12,000 feet (3.7 km) using 24 AWG or
9,000 feet (2.75 km) using 26 AWG per doubler. See Table 2 on page 3 for
deployment rules.
A block diagram of the HDU-409 with pinouts is shown in
page 25. The doubler unit power supply uses the HDSL simplified line
voltage to produce +5 Vdc and +3 Vdc required by the HDU-409 electronics.
The power feed is passed on to the HDSL output pair to power a second
doubler or a remote unit.
The typical power dissipation of the doubler unit is 3W.
Tip 6
HDSL 1 IN
Ring 5
80 to 200 V
CO
10
1
Frame
Ground
Tip 9
HDSL 2 IN
Ring 8
HDU-409 Lists 1, 2, and 3
A - F
UNCTIONAL
Power
HDSL
-
+5 V
Supply
and
+
+3 V
XCVRS
GFD
Figure 7. Doubler Block Diagram
April 30, 2003

Appendix A - Functional Description

Loop 1
475 K
IN
Output
Span
Voltage
Status
Control
Microprocessor
Loop 2
Figure 7 on
4 Tip
3 Ring
HDSL
OUT
XCVRS
12 Tip
HDSL 2 OUT
11 Ring
HDSL 1
OUT
Field
H0083-A
25