ADTRAN TRACER 6000 SERIES, Руководство пользователя

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TRACER 6000 Series Split System Manual Section 3 Engineering Guidelines
612806320L1-1B Copyright © 2005 ADTRAN, Inc. 37
RSSI Monitoring Interface
The RSSI voltage is a function of the signal strength at the receiver and is used to measure the received
signal strength. RSSI varies from approximately 0 to 5 VDC. An RSSI calibration sheet is shipped with the
system to provide the installer a cross-reference between actual received signal level (in dBm) and RSSI
voltage. This sheet is useful for verifying link budget calculations and ensuring proper equipment
installation.
To IDU
The TO IDU interface (N-type connector) is the ODU-side IF connection between the IDU and ODU. The
ODU transmits payload data to the IDU on a 140 MHz carrier and receives the IDU data on a 280 MHz
carrier. The IF connection also provides a full-duplex control and monitoring channel between the IDU
and ODU on a 4.5 MHz carrier. Additionally, this interface accepts DC power from the IDU, taken directly
from the voltage supplied to the power connection on the rear of the IDU. The power supply is protected
from a short-circuit on the IDU/ODU connection via a thermal protection device.
6. NETWORK MODULE INTERFACES
4xE1 Module with 120
Ω
Interface
The 4xE1 network module provides four E1 interfaces (through four RJ-45 connectors) that provide the
following functions:
• AMI or HDB3 coding
• Framed, multi-framed, and unframed framing support
• Network performance monitoring and reporting
• Test loopbacks (both line and link)
Table 11 provides the RJ-45 interface pinout for the 4xE1 network module.
Table 11. 4xE1 Module with 120
Ω
Interface RJ-45 Connector Pinout
Pin Name Description
1 TX TIP Transmit signal (TIP)
2 TX RING Transmit signal (RING)
3 UNUSED —
4 RX TIP Receive signal (TIP)
5 RX RING Receive signal (RING)
6–8 UNUSED —