Huawei OptiX RTN 600 - Modem Performance; IF Performance

OptiX RTN 600 Product Description
Commercial in Confidence Page 36 of 44
7.1.3 Modem Performance
Table 7-3 Modem performance
Performance
Item
4xE1 8xE1 16xE1 STM-1
Modulation scheme QPSK 16QAM QPSK 16QAM QPSK 16QAM 128QAM
Channel spacing
(MHz)
7 3.5 13.75/14
a
7 27.5/28
b
13.75/14
a
27.5/28
b
Encoding mode
Reed-Solomon (R-S) encoding for PDH signals
Trellis-coded modulation (TCM) and the R-S two-level encoding for SDH
signals
Adaptive
time-domain
equalizer for
baseband signals
Consisting of the 24-tap feed forward equalizer filter and the 3-tap decision
feedback equalizer
a: At 18 GHz, the channel spacing is 13.75 MHz. At other frequency bands, the channel spacing is 14 MHz.
b: At 18 GHz, the channel spacing is 27.5 MHz. At other frequency bands, the channel spacing is 28 MHz.
7.1.4 IF Performance
Table 7-4 IF performance
Item Performance
IF signal
Transmit frequency (MHz) 350
Receive frequency (MHz) 140
Impedance (ohm) 75
ODU management signal
Modulation scheme ASK
Transmit frequency (MHz) 5.5
Receive frequency (MHz) 10