ADC EDU-409 FUNCTIONAL DESCRIPTION

150-409-115-05, Issue 5 Functional Description

FUNCTIONAL DESCRIPTION

HiGain uses the ADC Two-Binary, One-Quaternary (2B1Q) HDSL transceiver system to establish two full-duplex 1040 kbps data channels between the ELU and the ERU units. Each EDU-409 List 1 increases the maximum range by approximately 3.66 km (12,000 feet) of 0.51-mm wire or 2.74 km (9,000 feet) of 0.4-mm wire per doubler.

A block diagram of the EDU-409 List 1 with pinouts is shown in Figure 4. The doubler unit power supply uses the HDSL simplified line voltage to produce +5 Vdc and +3 Vdc required by the EDU-409 List 1 electronics. The power feed is passed on to the HDSL output pair, to power a second doubler or a remote unit.

The maximum power dissipation of the doubler unit is 3 W.

Figure 4. Doubler Block Diagram

EDU-409 List 1 January 26, 2000 11