OptiX RTN 600
Product Description
Commercial in Confidence
Page 15 of 44
Table 3-4
Receive direction
No.
Component
Signal Processing Description
1
ODU
Isolates and filters RF signals.
Converts the RF signals into analog IF signals through down
conversions and amplifications.
Controls the level of the signals through the automatic gain control
(AGC) circuit.
Combines the IF signals and the ODU O&M signals. The O&M
signals have been modulated by an auxiliary modem.
Transmits the combined signals to the IF1A/IF1B.
2
IF1A/IF1B (IDU)
Splits the received analog IF signals and ODU O&M signals.
Controls the level of the analog IF signals through the AGC circuit.
Performs A/D conversion for the IF signals.
Digital demodulation.
Time domain adaptive equalization.
FEC decoding.
Synchronizes and descrambles the frames.
Extracts overheads from microwave frames.
Extracts VC-4 signals from microwave frames, and transmits the
VC-4 signals to the cross-connect unit.
3
PXC (IDU)
Cross-connects the VC-4 signals to the service bus of the
SL1/SD1 board.
4
SL1/SD1 (IDU)
Multiplexes the VC-4 signals, overheads, and pointers into STM-1
signals.
Scrambles the signals.
Converts the signals to be STM-1 optical signals.
