Equipment Performance; Performance Characteristics Of Idu - NEC PASOLINK Training Course

GENERAL

1.2 Equipment Performance

Data signal interface (between IDU and DTE)
Bit rate:
Level:
Code format:
Impedance:
Modulation method:
Demodulation method:
IF signal interface (between IDU and ODU)
Signal frequency
TX:
RX:
Signal level
IF output:
IF input:
Impedance:
Insertion loss:
Orderwire frequency
Output:
Input:
Power supply:
Control/Monitor signal frequency:
1-6
The performance characteristics of the IDU are listed in Table 1-1.
Table 1-1 Performance Characteristics of IDU
• 2.048 Mbps ±50 ppm (2 MB x 2/2 MB x 4/2 MB x
8/2 MB x 16 system)
• 8.448 Mbps ±30 ppm (8 MB x 1 system)
• 34.368 Mbps ±20 ppm (34 MB x 1 system)
Meets specifications of ITU-T G.703
High density bipolar-3 (HDB-3)
75 ohms, unbalanced or
120 ohms, balanced
4-phase shift keying (4 PSK) system
Quasi-coherent detection
850 MHz
70 MHz
−5 dBm, nominal
−15 to 0 dBm (at , RX IN), varies with cable length
(maximum cable length (8D-FB): l=300 m)
50 ohms, unbalanced
15 dB at 70 MHz (l=300 m)
45 dB at 850 MHz (l=300 m)
468 kHz, amplitude modulation (AM)
450 kHz, AM
−43 V DC (through) at IF IN/OUT
10 MHz, amplitude shift keying (ASK) (at IF IN/OUT)
ROI-S02775