• home icon
  • arrow icon Products
  • arrow iconLow Power Transceiver with Ethernet - VHF / UHF (20-90)

Low Power Transceiver with Ethernet - VHF / UHF

20-90

The 20-90 is a simple to configure POCSAG paging transceiver with high sensitivity receiver combined with a 100mW transmitter. It  operates over the frequency range of 142-175MHz (VHF) & 440-479MHz (UHF) decoding and encoding 512 or 1200 baud, alphanumeric or numeric messages.  The 20-90 supports multiple message queueing and will queue up to four 73 character messages or multiple smaller messages. The 20-90 offers Ethernet connectivity.

 

 

The 20-90 can be controlled via an RS232 serial interface or TCP/IP (optional) to provide numeric, alphanumeric and tone only POCSAG encoding. It enables a user to call a pager (over 2,000,000 codes), append an appropriate priority level (1 of 4) and add an alpha or numeric message.

The product supports full batching of serially queued input messages and can be configured to automatically respond with checksum information of the last received message.

An intelligent self-adjusting channel busy check prevents message collision or corruption.

The receiver is supplied with clean contacts rated at 1A 24V DC operation. LEDs indicate receiver operation and status.

Virtual outputs can be used to remotely trigger input or periodic messages and provide a mechanism to acknowledge reception of messages. It can transmit the received signal strength of the last received message allowing the receiver positioning and system health to be monitored.

  • Supports Salcom relay control protocol to control one on-board relay plus several “virtual outputs”
  • TCP/IP connectivity
  • 2 discrete inputs with different pre-programmed messages on high and/or low transition.
  • Baud 512, 1200
  • FSK with NRZ Data
  • 142-175MHz (VHF) & 440-479 MHz (UHF)
  • variants available
  • 100mW
  • Paging Transceiver: allowing both the encoding and decoding of paging messages.
  • Paging Receiver (only—by configuration): allowing the decoding (only) of paging messages where desired.
  • Transmitter: With channel busy check function before transmissions.
  • Autonomous Store & Forward Paging Repeater with duplicate message reject.
  • Point to Point raw serial link
  • Allows TCP/IP output for closed loop system monitoring of messages received
Technical Specifications
Frequency Range 142-175MHz (VHF)
440-479MHz (UHF)
Frequency Selection User configurable
Power Supply +13.8V typical (11 to 15 VDC range)
Power Consumption Standby: 33mA
Transmit: 150mA
Relays: 18mA per energised relay
Transmit Power 100mW
Channel Spacing 10kHz, 12.5kHz, 6.25kHz
Modulation FSK with NRZ data
Deviation ±4.5kHz & ±2.3kHz
Receiver Sensitivity Approx -120 dBm
Baud Rates 512, 1200
Message Format POCSAG
Configuration Application Salcom Configuration Tool
Programming Cable 12-45-0000 (RJ12 to DB9)
Can be used with a USB to RS232 DB9 Serial Adapter Cable
Serial Port 9600 , N, 8, 1; RS232
Serial Protocols Salcom
Discrete Inputs 2 (Ground activated)
Ethernet TCP/IP
Discrete Outputs 2 Relay Contacts (1A @ 24VDc); 2 Open Collector (100mA max)
Note: Not suitable for 240VAC Connections
Connectors Serial Port (RS232) = RJ12 (6P6C)
Inputs / Relay Output / Open Collector) = RJ45 (8C)
Ethernet = RJ45
Power Connector 2-way plug & socket, screw connections (supplied)
RF Connector 50Ω BNC
Environmental Protection Not suitable for outdoor use and should be protected from adverse environmental conditions
Operating Temperature -10ºC to +50ºC (+14ºF to +122ºF)
Indicators Power LED (Green)
- Flashing (1s Freq) = Normal Operation
- Solid (up to 5s) = Receiving Data
Status LED (Red)
- On = Transmitting
- Flashing = Error Condition
Weight 178g
Enclosure Dimensions 130mm x 68mm x 31mm (WxDxH)
Enclosure Material Extruded aluminium
Colour Dark blue
Type Approvals AS/NZS 4769.1:2000 + Amendment 1:2002 (RF)
EN 300-224-2 (RF) (to follow)
FCC CFR47 Part 90 (RF) (to follow)
FCC CFR47 Part 15 (EMC) (to follow)
EN 301 489-2 V2.1.0 (EMC) (to follow)
EN 60950-1:2006 (Safety) (to follow)
Other All specifications subject to change without prior notification.
20-90 Transceiver Brochure
  • Information

    The 20-90 can be controlled via an RS232 serial interface or TCP/IP (optional) to provide numeric, alphanumeric and tone only POCSAG encoding. It enables a user to call a pager (over 2,000,000 codes), append an appropriate priority level (1 of 4) and add an alpha or numeric message.

    The product supports full batching of serially queued input messages and can be configured to automatically respond with checksum information of the last received message.

    An intelligent self-adjusting channel busy check prevents message collision or corruption.

    The receiver is supplied with clean contacts rated at 1A 24V DC operation. LEDs indicate receiver operation and status.

    Virtual outputs can be used to remotely trigger input or periodic messages and provide a mechanism to acknowledge reception of messages. It can transmit the received signal strength of the last received message allowing the receiver positioning and system health to be monitored.

  • Details
    • Supports Salcom relay control protocol to control one on-board relay plus several “virtual outputs”
    • TCP/IP connectivity
    • 2 discrete inputs with different pre-programmed messages on high and/or low transition.
    • Baud 512, 1200
    • FSK with NRZ Data
    • 142-175MHz (VHF) & 440-479 MHz (UHF)
    • variants available
    • 100mW
    • Paging Transceiver: allowing both the encoding and decoding of paging messages.
    • Paging Receiver (only—by configuration): allowing the decoding (only) of paging messages where desired.
    • Transmitter: With channel busy check function before transmissions.
    • Autonomous Store & Forward Paging Repeater with duplicate message reject.
    • Point to Point raw serial link
    • Allows TCP/IP output for closed loop system monitoring of messages received
  • Specifications
    Technical Specifications
    Frequency Range 142-175MHz (VHF)
    440-479MHz (UHF)
    Frequency Selection User configurable
    Power Supply +13.8V typical (11 to 15 VDC range)
    Power Consumption Standby: 33mA
    Transmit: 150mA
    Relays: 18mA per energised relay
    Transmit Power 100mW
    Channel Spacing 10kHz, 12.5kHz, 6.25kHz
    Modulation FSK with NRZ data
    Deviation ±4.5kHz & ±2.3kHz
    Receiver Sensitivity Approx -120 dBm
    Baud Rates 512, 1200
    Message Format POCSAG
    Configuration Application Salcom Configuration Tool
    Programming Cable 12-45-0000 (RJ12 to DB9)
    Can be used with a USB to RS232 DB9 Serial Adapter Cable
    Serial Port 9600 , N, 8, 1; RS232
    Serial Protocols Salcom
    Discrete Inputs 2 (Ground activated)
    Ethernet TCP/IP
    Discrete Outputs 2 Relay Contacts (1A @ 24VDc); 2 Open Collector (100mA max)
    Note: Not suitable for 240VAC Connections
    Connectors Serial Port (RS232) = RJ12 (6P6C)
    Inputs / Relay Output / Open Collector) = RJ45 (8C)
    Ethernet = RJ45
    Power Connector 2-way plug & socket, screw connections (supplied)
    RF Connector 50Ω BNC
    Environmental Protection Not suitable for outdoor use and should be protected from adverse environmental conditions
    Operating Temperature -10ºC to +50ºC (+14ºF to +122ºF)
    Indicators Power LED (Green)
    - Flashing (1s Freq) = Normal Operation
    - Solid (up to 5s) = Receiving Data
    Status LED (Red)
    - On = Transmitting
    - Flashing = Error Condition
    Weight 178g
    Enclosure Dimensions 130mm x 68mm x 31mm (WxDxH)
    Enclosure Material Extruded aluminium
    Colour Dark blue
    Type Approvals AS/NZS 4769.1:2000 + Amendment 1:2002 (RF)
    EN 300-224-2 (RF) (to follow)
    FCC CFR47 Part 90 (RF) (to follow)
    FCC CFR47 Part 15 (EMC) (to follow)
    EN 301 489-2 V2.1.0 (EMC) (to follow)
    EN 60950-1:2006 (Safety) (to follow)
    Other All specifications subject to change without prior notification.
  • Manuals & Downloads
    20-90 Transceiver Brochure