Sabtu, 27 Februari 2010

AutoLog® Radio Modems

radio modems

The AutoLog WSN Radio modem series has been designed to meet high specifications. It offers very cost effective radio modems for stand alone applications or for integration into OEM products.
The design has been optimised for reliability and low current consumption, making the WSN suitable for operation on remote sites without mains power.
Applications include security, command & control, data logging, SCADA, telemetry, remote switching or any similar applications where serial data needs to be transmitted and a cable is not the most practical solution.
The WSN is available with two different transmit powers. The low power version meets the licence-exempt ETS300-220 specification while the higher power 5W version meets the tougher ETS300-113 and the USA and Canadian specifications.

Radio modemDATASHEET ALWSN_Radio-modems

AutoLog WSN Radio Modem Series (WSN170, WSN450, WSN470, WSN869, WSN870):

Frequency Range depending on model:
WSN170: 138 - 175MHz
WSN450/470: 406 - 512 MHz
WSN869: 869 -870MHz
WSN870: 820 - 950MHz
Power requirements
Standby

Receive
Transmit
12VDC (10 - 15.5DC)
<75uA
<70mA
300mA to 2.1A depend on Tx power
Number of channels 80 user programmable channels
Min. programmable channel step 6.25 or 5 kHz
Channel spacing 12.5kHz, 20kHz or 25kHz
Frequency stability 2ppm (-30 to +60 °C)
Construction Milled aluminium enclosure
Size (W x H x D) 75 mm x 130 mm x 30 mm
Mounting Screws to flat surface
Weight 250 g
Connectors DC power 2-way Klippon type
RS232 I/O 9-way D-type
RF BNC (50 ohm)
Led indicators TX, BUSY, TXD, RXD, SYSTEM
Approvals European: ETS 300-220, ETS 300-113, ETS 300-489
Austratian: AS4268.2-1995
USA: FCC Part 90/15
Canadian: DOC

Receiver:
Sensitivity -120dBm for 12dB SINAD de-emph
-117dBm for 12dB SINAD flat
Bandwith VHF 5MHz without re-alignment
UHF 12MHz without re-alignment
870 20MHz without re-alignment
Spurious response WSN450/869: >65dB
WSN170/470/870: >70dB
Blocking WSN450/869 >85dBuV
WSN170/470/870 >90dBuV
Intermodulation WSN450/869 >60dB
WSN170/470/870 >65dB
Adjacent channel >65dB at 12.5kHz
IF Frequencies 45MHz and 455 kHz
Spurious emissions WSN450/869 < ETS-300-220
WSN170/470/870 <>
Mute response time <>

Transmitter:
RF output power WSN450/869 10mW - 750mW
WSN170/470/870 50mW - 5W
Bandwidth: VHF 10MHz without re-alignment
UHF 12MHz without re-alignment
870 30MHz without re-alignment
Internal Modulation: FFSK, 2 Level FSK, 4 Level FSK & GMSK via the internal modem.
Max. Deviation: ± 7.5kHz max
Adj. Channel Power: > 65dB at 12.5kHz
Transient response As per ETS300-113
Spurious Emissions <>
Rise Time: <>

Internal Modem:
Radio Baud Rate: 150 – 9600bps over-air
RF Bandwidth: 12.5kHz
Signalling Formats Programmable for 12.5kHz channel:-
Up to 1200bps - FSK with V23 and Bell202 supported.
2400bps - coherent 1200/2400Hz or 1200/1800Hz FFSK.
4800bps - GMSK 9600bps - 4 level FSK.
NRZI: On or Off
Bit Error Rate: 2400 baud less than 1 in 10^-3 at –120dBm
4800 baud less than 1 in 10^-3 at –117dBm
9600 baud less than 1 in 10^-3 at –115dBm (FEC on)
9600 baud less than 1 in 10^-3 at –112dBm (FEC off)
FEC: Programmable option at 9600bps

Serial Data:
Serial Interface: RS232
Format Asynchronous (or Synchronous with custom software). Programmable; Odd, Even or No Parity, 1/2 stop bits, 7/8 data bits.
Interface Rates: Programmable 150bps to 38400bps

Serial operation

The WSN requires no knowledge of the data it is transmitting; data can simply be sent and received with minimal delay. Transmission control can either use RTS control signals or be configured for automatic initiation of transmission on receipt of serial data. In either case, the radio provides a CTS output which can optionally be used for flow control. The WSN incorporates an internal buffer to cope with situations where the interface data rate differs from the over-air rate.

Internal soft modem

The WSN features an internal “soft modem” which offers unparalleled performance and flexibility over a wide range of speeds and formats and enables future formats to be handled by software upgrade.
Within a 12.5kHz channel, the over-air transmission from the unit can be user programmed for a range of speeds. If the maximum speed is not required, the unit can be configured for a lower speed to give an improved receiver threshold.
For 150, 300, 600,1200 & 2400 baud, FSK/FFSK is used with both Bell202 and V.23 supported. At 4800bps GMSK modulation is used, while at 9600bps, the modulation is 4-level FSK.

Channel selection

The WSN can be programmed for simplex or semi-duplex operation with up to 80 discrete channels. Alternatively, complete band allocations like the UK MPT1329 and MPT1411 bands can be loaded.
Once programmed, the channels can then be selected via rotary switches on the front panel.

RF power

The transmit power can be accurately set using a locally connected PC with the supplied software. There are two transmit power ranges available. The low power WSN450 & WSN869 can be set between 10mW and 750mW, while the higher power WSN170, WSN470 & WSN870 versions can be set between 50mW and 5W.

Programmability

The parameters of the WSN can be configured through the local serial port using DOS or Windows 95/98/2000/XP based software. The individual configurations can be stored on disc for future use or printed.

Status LEDs

The WSN has 5 LEDs to enable the operator to see at a glance the status of the radio and its interfaces. The System LED provides the operator with a quick visual health check and if the software detects an error, a code is flashed on the LED to indicate the error.

Squelch tail elimination

For old or non tolerant protocols, where the presence of a mute (squelch) tail may cause a problem at the end of a message, a simple packetisation option can be enabled using the configuration software

Forward error correction

Forward error correction is a programmable option at 9600bps, but as with all FECs, the associated overhead will reduce the effective data throughput rate when it is selected. Error correction offers insignificant performance improvements below 9600bps so the option is permanently disabled at those lower rates.

"RSSI" Receive signal strenght indication

The RSSI signal is accurately measured by an internal A-D converter and compared to an individually calibrated RSSI graph within the processor. The signal strength can then be accurately read in engineering units from a PC connected to the serial port.

Power save mode

The WSN has both internal and external power save modes.

Internal Power Save Mode
The microprocessor controls the on/off function of the receiver and after a pre-programmed time the MPU will switch on the receiver to look for a carrier. If a carrier is not detected then the transceiver goes back into sleep mode. If during the time the transceiver is awake a carrier is received, the unit will stay awake. After the carrier drops out, the receiver will stay awake until the programmed resume time elapses. Once the resume time has elapsed the transceiver will go back into sleep mode. The power-save, wake and resume times are all user programmable.

External Power Save Mode
In the external mode the ON/OFF function of the modem is controlled by the host via the DTR line.

Tx timeout-timer

The transmitter within the WSN has a time-out timer which allows the maximum continuous transmission time to be set in order to prevent channel blocking due to a to fault. The timer operates in all modes and can be programmed in one second steps between 0 and 255 seconds. If programmed and the time is exceeded, transmission will cease until the action that normally causes transmission is removed and then re-applied.

PC software

Dedicated PC software running under DOS or Windows 95/98/2000/XP allows configuration of the radios. This software provides unrivalled versatility combined with ease of use for the operator.

Order information

Ask more!

Please call or e-mail for more information!

FF-Automation
Eräkuja 2
01600 Vantaa
Finland
Tel: +358 9 530 6310
Fax: +358 9 530 63130

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