BreezeLINK Wireless T1/E1 and Fractional Modems
Specifications

This unit has been discontinued by the manufacturer, please see the AIRmux 104 as a replacement.

BL512

For data rates of up to 512 Kbps, with RS-530, V.35 or X.21 interface.

BL2048

For data rates of up to 2048 Kbps, with E1, T1, RS-530, V.35 or X.21 interface.

Line Interface Specifications

Data Rates (Full Duplex)

N x 64Kbps: 64, 128, … 2048 Kbps

LIU Options

T1 Interface

E1 Interface

Fractional T1 Interface

Fractional E1 Interface

V.35 Interface

RS-530 Interface

X.21 Interface

Echo Canceler (Fractional E1/T1)

Meets ITU-T recommendations G.165 and G.168

Front Panel LED Indicators

General

Power

TEST

Line

Radio

Rx Sync
Tx Sync

Connectors

Power

100 - 240 VAC or 18 - 72 VDC, 25 W max.

Management

Monitoring, diagnostics and configuration.

Interface - V.24/RS-232, 9 pins D Type female connector.

Access using a locally connected ASCII terminal or remotely via dial-up modem.

Remote unit management, through the wireless link.

Radio and Modem Specifications

Radio Type

Full duplex point to point, independent transmit and receive radio channels.

Transmission Technique

Frequency Hopping Spread Spectrum radio.

Hopping rate: 160 hops per second

Hopping settling time: 200uS max.

Spectrum Utilization and Modulation

Table -1. Spectrum Utilization and Modulation

Modem Rate

The modem rate is selected automatically by the selected LIU Data Rate (Clock Rate), according to the following table:

Table -2. Default Modem Rate According to Selected LIU Data Rate

Channel Bandwidth

The bandwidth for each channel is –20dBc at ± 500KHz from carrier, regardless of bit rate.

System Bandwidth

2400-2500MHz.

Different frequency bandwidth is available according to the different country standards.

Table -3. Frequency Bandwidth According to Country/Standard

Transmitter Output Power

16dBm (typical), 15dBm (minimum) at the antenna port, in high power mode.

2dBm (typical), at the antenna port in low power mode.

Maximum Spurious Level

-60dBc.

Receiver Sensitivity

The receiver sensitivity, as a function of the radio BER, is determined according to Table .-4. Note that the radio error rate does not include the error correction algorithm, which can improve sensitivity by up to 3dB, depending on the settings of the unit.

Table -4. Receiver Sensitivity as a Function of the Radio BER

Error Correction Algorithm

• Retransmission of packets with errors.
• Elastic buffer to maintain continuous data flow.

System Gain

System gain = Tx power - sensitivity threshold

For BER=1E-5, not including the error correction algorithm.

Table -5. System Gain

Maximum Receive Level

-10dBm for modem rates: 0.5Mbps, 1Mbps, 2Mbps.

-25dBm for modem rate of 3Mbps.

Recommended Receive Level

10dB above sensitivity threshold for an adequate fade margin.

Adjacent Channel Rejection

Adjacent channel rejection indicates the difference (in dB) between the power level of an interfering RF signal and the power level of a desired signal, where the interfering signal causes a degradation of 3db in the sensitivity of the receiver. The graph below displays the adjacent channel rejection of the BreezeLINK receiver as a function of the frequency separation (Delta F in MHz) between the frequency of the interfering signal and the desired signal.

Separation between TX and RX Frequencies

Minimum 12MHz for sensitivity degradation of 1dB.

Maximum Number of Links to Synchronize

Table -6. Maximum Number of Synchronized Links

Filter Curves

Filter curves for the transmitter and receiver are shown in the graph below. Note that the receiver contains two cascaded filters of this type.

Frequency Accuracy

± 15ppm.

Noise Figure

5dB max.

Total Link Delay

Controllable, between 14ms to 156ms, depending on the Data and Radio rates.

Mechanical Specifications

Dimensions

Standard 1U half 19"

7.7" x 9.6" x 1.7" (195mm x 244mm x 44mm)

Weight

2.2 lb (1 Kg)

Environmental Specifications

Standards

Antennas

One transmit antenna, one receive antenna.

Standard BreezeLINK Antennas:

Basic - 8.5dBi

Medium Gain - 12dBi, 18dBi

High Gain - 24dBi.