HighSpeed Internet Linking Radio

Dandin has partnered with Interlink Products in the development of a High Speed Internet linking radio.

A necessary element in any wireless Internet network is the ability to connect local user sites together. One method to tie these user sites together is to use highspeed wireless linking radios. The Dandin Group's HighSpeed Internet Linking Radio is such a device. It will allow highspeed connection to occur between these user local loop access points.

This page provides technical specifications of the product and its modular architecture. Operating over the appropriate radio segment, this highspeed data radio will provide point-to-point backbone capabilities over a wide range of frequencies. When used in conjunction with the TDR-900, it can provide the necessary networking infrastructure for wireless Internet local loop access.

Design Objectives

1. Provide backbone solution to allow scalability of local loop solutions.
2. Support flexibility in bandwidth (Fractional T1 (1.54Mbs) through four T1 (6Mbs))
3. Support flexibility in frequency agility (through the use of transverters and radio modules)
4. TCP/IP Transparent Operations

Technical Overview

RF SECTION:

The RF operating frequency is determined by the radio segment. The selection of the radio segment is dependent upon the frequency chosen for operations.

MODULATOR:

Input to the transmitter can be selected as DS-1 (T1). A summary of the performance characteristics is provided below :

DEMODULATOR:

The output from the transmitter can be selected from DS-1 (T1). A summary of the performance characteristics is provided below :

Demodulator (DS-1)
IF OUTPUT FREQUENCY	44MHz
INPUT IMPEDANCE	50 ohms unbalanced
NOMINAL INPUT LEVEL	-10 dBm
INPUT LEVEL STABIILITY	+/- 2dB
S/N AT INPUT	36dB
INPUT DYNAMIC RANGE	TBD
INPUT FILTER BW	6MHz
MODULATION	64QAM
UNCODED (Eb/No)	TBD @ BER 10-6
CARRIER OFFSET	< +/- 50kHz
PHASE NOISE	-75dBc @ 10kHz offset
A/D OUTPUT
PEAK DATA RATE OFFSET	100ppm
ACQUISITION TIME	< 500msec
LOCKED STATUS INDICATOR	LED Lock Indicator
FEC	R-S ( 4% max overhead ; 3dB improvement @10-6)
IMMUNITY	CW modulation ( freq , index)
Multipath	TBD

Demodulator (4xDS-1)
MULTIPLEXER INPUT	DS-2 ( 6.321Mbps)
MULTIPLEXER OUTPUT (4 ea)	ANSI T1/DS-1
IMPEDANCE	120 ohm (balanced)
INPUT LINE RATE	1.544 Mbps
LINE RATE STABILITY	< +/- 20ppm
INPUT LINE CODE	B8ZS or AMI
CLOCK	Recovered
MULTIPLEXER STANDARD	G.732 /G.711
ELECTRICAL INTERFACE	CCITT G.703 ( Sec. 2)
CONTROL CHANNEL STANDARD	DS0 ( 64kbs)
ELECTRICAL INTERFACE	RS-422

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CONTROL & MONITORING :

SYSTEM CONTROL

RS-232

 

MONITOR INDICATORS

SYNCHRONIZATION INDICATOR

INPUT /OUTPUT LOCK ( DS-1)

BIPOLAR VIOLATIONS

DEMODULATOR LOCK

INPUT LEVEL INDICATOR

FEC

AIS

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DIAGNOSTICS :

LOCAL & FAR-END LOOP BACK

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PHYSICAL

Dimensions : 19"W x 10"D x 1 _" H

Weight : < 10lbs

POWER SUPPLY

Maximum Power Dissipation 20watts

for baseband modem

Internal operating Voltages +/- 12 V , +5V

ENVIRONMENTAL

Operating Temperature Range : 0 - 50 DEG C

Non Operating : -20 to +80 DEG C

Rain : 250mm/hr ; IEC-529 ; MIL-STD 810E. Method 506.3

Atmospheric Conditions : Salt pollutants & contaminants as encountered in coastal and industrial areas. MIL-STD 810E , Method 509.3

Solar : 360 BTU/sq.ft./hour @ 60 deg C. MIL-STD 810E , Method 505.3

Fungus : MIL-STD 810E , Method 508.4

Sand Dust : MIL-STD 810E, Method 510.3

Vibration : MIL-STD 810E , Method 514.4

Shock : 30G ( Three axes X,Y,Z). MIL-STD 810E , Method 516.4

Altitude : 30,000 ft

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RELIABILITY

MTBF : 50,000hrs

Hot Standby : Optional

EMI/Susceptibility :

EMI Emissions : FCC Part 15B Class B EN 500081-1; EN55022 Class B