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Xpress Specifications and Advanced Settings

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Technical specifications for the MaxStream Xpress Ethernet Bridge RF Modems

Performance
Transmit Power Output (software selectable): 125 mW (21 dBm), 4 Watts EIRP with 15 dB antenna
Indoor/Urban Range (w/ 2.5 dB dipole antenna): up to 1000’ (300m)
Indoor/Urban Range (w/ high-gain antenna): up to 2000’ (600 m)
Outdoor RF line-of-sight Range (w/ 2.1 dB dipole antenna): up to 2 miles (3.2 km)
Outdoor RF line-of-sight Range (w/ high-gain antenna): up to 15 miles (24 km)
Throughput Data Rate (software selectable): 935 Kb/s
RF Transmission Rate: 1.5 Mb/s
Receiver Sensitivity: -98 dBm @ 10e-4 BER
 
General
Frequency: ISM 902 - 928 MHz
Spread Spectrum: DSSS (Direct Sequence Spread Spectrum)
Encryption: 128-bit Encryption
Current Consumption: Transmitting 370 mA @ 5V
Latency: < 1 ms - assuming a dedicated wireless link to client device
Jitter: ± 0.05 ms - depending on packet size, interference and SNR
Radio Channels: 12 non-overlapping
Automatic Frequency Select: Yes - radio channel automatically selected and adaptively optimized
Manual Frequency Mode: Yes
Status LEDs: Power, RF Link, Ethernet Link, Traffic, RF RX, RF TX, 4/Channel and 6/Link quality
MAC Pass-through Filter: Yes - can be disabled
Error Correction Technique: Sub-block error detection and retransmission
Adjacent-band rejection: SAW receiver filter attenuates cellular and pager interference
Antenna Connector: TNC
FCC ID (Certification Part 15.247): R4N-MW900
PoE (Power-over-Ethernet): Proprietary 6V system - includes injectors and power supplies
 
Physical Properties
Size (Indoor): 3.25” x 5.25" x 1.19” (8.26cm x 13.34cm x 3.00cm)
Weight (Indoor): 3.84 oz (110 g)
Data Connection: RJ-45
Operating Temperature: -40 to 70° C

Advanced Settings

The XPress Ethernet Bridge has three user selectable modes; Site Survey, Manual Frequency Select and MAC filter. These modes are enabled by the 8 position DIP switch on the master RF modem. These settings are automatically shared between the units and only need to be set on one unit for both to be activated. For default automatic mode, all DIP switches should be in the OFF position

Site Survey Mode: (DIP switch 4 is ON)

In this mode the XEB can perform a site survey. When activated, the Link Quality LEDS will be continuously updated to allow the installer to optimize antennas orientation and perform a channel quality assessment. In this mode the radio link is flooded with simulated Ethernet traffic to stress the link and increase the accuracy of the Link Quality display. Regular Ethernet traffic does not get transported while the radios are in this mode.

Manual Frequency Selection Mode:

The XEB is designed to automatically select the best frequency for radio transmission. There may be circumstances when the user wishes to restrict the operation of the XEB to a subset of the 902-928 band. The user may activate a manual selection mode that will allow the radio to automatically choose the best channel within a grouped subset of the 12 available channels:

DIP Setting Channel Frequency
2 ON / 3 OFF 1,2,3 or 4 903-909 MHz
2 OFF / 3 ON 5,6,7 or 8 911-917 MHz
2 ON / 3 ON 9,10,11 or 12 919-925 MHz

Or, the user may wish to specify a specific channel. This can be done by setting DIP switches 5-8 as shown in the table below: (Turn DIP switches 2 & 3 OFF)

DIP Setting Channel Frequency
5 On / 6 Off / 7 Off / 8 Off 1 903 MHz
5 Off / 6 On / 7 Off / 8 Off 2 905 MHz
5 On / 6 On / 7 Off / 8 Off 3 907 MHz
5 Off / 6 Off / 7 On / 8 Off 4 909 MHz
5 On / 6 Off / 7 On / 8 Off 5 911 MHz
5 Off / 6 On / 7 On / 8 Off 6 913 MHz
5 On / 6 On / 7 On / 8 Off 7 915 MHz
5 Off / 6 Off / 7 Off / 8 On 8 917 MHz
5 On / 6 Off / 7 Off / 8 On 9 919 MHz
5 Off / 6 On / 7 Off / 8 On 10 921 MHz
5 On / 6 On / 7 Off / 8 On 11 923 MHz
5 Off / 6 Off / 7 On / 8 On 12 925 MHz
MAC Filter On/Off Mode: (DIP switch 1 is on)

The XEB is designed to work in hub or switched Ethernet networks. When the XEB is used in a switched network the MAC filter should be off (default mode). When the XEB will be operated on an un-switched hub it should be enabled. The MAC filter monitors local traffic and will not forward data that is destined for a local client. The filter monitors local MAC addresses and automatically updates these addresses as new devices enter the network. Broadcast and multicast messages are always transmitted and MAC addresses are transmitted until they are determined to be for a local device. This table is reset when the XEB power is cycled for over 10 seconds.

 

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