RAD Data comm ASM-20 Specifiche Pagina 23

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Installation and Operation Manual Chapter 1 Introduction
ASM-40 Ver. 1.0 Technical Specifications 1-7
Receiver
An AGC end equalizer provides the received signal for the clock and data recovery
circuitry.
NRZ Interface
The digital side provides an interface choice of V.35, X.21, RS-232, RS-530, V.36
(via adapter cable), Ethernet/Fast Ethernet bridge, or IP router.
ASM-40 can be ordered with G.703-HDB3 on the digital side, for data rates 2048,
1024, 512, 256, or 128 kbps. This enables operation as a baud rate converter or
repeater for G.703. In addition, ASM-40 supports G.703 Codirectional interface
operating at 64 kbps.
1.4 Technical Specifications
Line Interface
Line Type
Unloaded 4-wire twisted pair 19 to 26 AWG,
or BNC 75Ω coaxial cable
Line Code
HDB3 (1920 kbps or 2048 kbps baud rate)
B8ZS or AMI (1536 kbps or 1544 kbps
baud rate)
Framing
Unframed
Transmit Level
According to G.703
Baud Rate
2048, 1544, 1536, 1920 kbps
Impedance
75Ω for 2048 and 1920 kbps – unbalanced
(BNC coax)
100Ω for 1544 and 1536 kbps balanced
(terminal block or DB-15)
120Ω for 2048 and 1920 kbps
(terminal block or DB-15)
Return Loss
Better than 15 dB
Line Attenuation
Up to 40 dB
Range
1.75 km (1 mile) over 24 AWG wire
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