ZRT Manual
Page 1 of 37
Rev. J – 11 September 2008
ZRT SERIES
RADIO MODEMS
SETUP, INSTALLATION
&
OPERATING MANUAL
Страница 1: ...ZRT Manual Page 1 of 37 Rev J 11 September 2008 ZRT SERIES RADIO MODEMS SETUP INSTALLATION OPERATING MANUAL...
Страница 2: ...ZRT Manual Page 2 of 37 Rev J 11 September 2008...
Страница 3: ...NECTIONS 15 5 3 12VDC POWER 17 5 4 ANTENNA PORT 17 5 5 CHANNEL SWITCHES 17 5 6 PROGRAMMING 17 5 7 RF POWER 17 5 8 TIME OUT TIMER 18 5 9 INTERNAL MODEM 18 5 10 RADIO DATA FORMATS 19 5 11 FORWARD ERROR...
Страница 4: ...ying of the manual in whole or in part by any method without written permission is strictly prohibited 1 2 2 Right To Change In the interest of improvement R F Technologies reserves the right to chang...
Страница 5: ...to a range of values from 150 baud to 38 400 baud while the over air data rate can be independently set to a range of values between 150 baud and 9 600 baud If high throughput speeds are not required...
Страница 6: ...nowledge of the data it is transmitting Data is simply transmitted and received with minimal delay 2 7 2 Protocol specific modem The radio recognises a complete frame and only transmits and receives d...
Страница 7: ...s a user programmable option the ZRT can also operate in a packetisation mode where framing characters are added at the start and end of the user s message prior to transmission and stripped off again...
Страница 8: ...25kHz Operating Temp Stability 2ppm 30 to 60 C Construction Aluminium enclosure Size 75mm W x 130mm L x 30mm H excluding brackets and connectors Mounting Screws to a flat surface Weight 250g Connecto...
Страница 9: ...Interface 232Full version RS 232 complete with signalling lines TTL version 5V TTL levels rather than RS 232 232 485 version RS 422 RS 485 2 or 4 wire or RS232 with looped back signalling lines Parit...
Страница 10: ...the relevant requirements of this Safety specification 3 2 3 European Declaration of Conformance Hereby RF DataTech declares that the ZRT Series of Radio Modems is in compliance with the essential re...
Страница 11: ...different gain antennas Antenna Gain Minimum Separation Distance Unity or Less 0 5m 3dB 0 7m 6dB 1 0m 8dB 1 3m 10dB 1 6m 12dB 2 0m The antenna used for this transmitter must not be co located in conj...
Страница 12: ...625 2 457 51875 463 01875 3 457 53125 463 03125 4 457 54375 463 04375 5 457 55625 463 05625 6 457 56875 463 06875 7 457 58125 463 08125 8 457 59375 463 09375 9 457 60625 463 10625 10 457 61875 463 118...
Страница 13: ...463 66875 55 458 18125 463 68125 56 458 19375 463 69375 57 458 20625 463 70625 58 458 21875 463 71875 59 458 23125 463 73125 60 458 24375 463 74375 61 458 25625 463 75625 62 458 26875 463 76875 63 458...
Страница 14: ...FREQUENCY 1 458 5000 Guard Ch 2 458 5125 3 458 5250 4 458 5375 5 458 5500 6 458 5625 7 458 5750 8 458 5875 9 458 6000 10 458 6125 11 458 6250 12 458 6375 13 458 6500 14 458 6625 15 458 6750 16 458 68...
Страница 15: ...rs 5 2 INTERFACE PORT PIN CONNECTIONS The ZRT Series is equipped with a 9 way female D connector for the traffic interface The pins of this connector are allocated as follows 5 2 1 RS232 Only Full Han...
Страница 16: ...to Pin 6 o 8 Do Not Use Internally connected to Pin 7 3 ve Data In to Radio TXD o 7 ve Data In to Radio o TXD Internally connected to Pin 8 2 ve Data Out from radio RXD o o 6 DSR Data Set Ready Inter...
Страница 17: ...t hand rotary switch is the tens switch and the right is the units switch thus to set channel 37 set the left switch to 3 and the right to 7 5 6 PROGRAMMING The parameters of the ZRT can be programmed...
Страница 18: ...Modulation Tone sets Within a 12 5kHz channel the over air transmission from the unit can be programmed for a range of speeds For 150 300 600 1200 the modulation is FFSK with Bell 202 and V 23 Mode 2...
Страница 19: ...fades or burst error conditions An error rate of 1x10 4 with the FEC switched off will typically improve by a factor of 2000 to around 5 in 10 7 when it is switched on but an initial error rate of 1x1...
Страница 20: ...he serial port transmission ceases as soon as the serial buffer has been emptied and a period equivalent to two characters at the radio signal baud rate has elapsed It is important to note that since...
Страница 21: ...to be sent Routing information must be stored in each radio for each destination address that requires the use of repeaters or store forward nodes Any radio in the system can operate as a repeater sto...
Страница 22: ...ynthesiser to be loaded and locked prior to transmission reception This timing constraint is important when deciding how soon after receiving a message a reply may be sent For simplex semi duplex oper...
Страница 23: ...delay Table B Table B trbyte Duration of 1 byte at radio signal baud rate Table C Table C tmdel Modem decode latency Table D Table D TABLE B The lead in delay is a programmable parameter but minimum v...
Страница 24: ...to allow for propagation delays in the receiving device before shutting off the carrier this prevents possible chopping of the message tail The time thold is composed of a fixed 2 5ms period plus the...
Страница 25: ...may not be possible to run all applications under the power save mode due to the turn around times required by the host system In some circumstances it is possible to achieve power save and fast polli...
Страница 26: ...ROR No FAULT 1 Position of the channel switches has changed 2 A channel has been loaded that has no RX frequency programmed 3 Transmission has been attempted on a channel that has no TX frequency prog...
Страница 27: ...me network ID but a different radio address Notes should be kept detailing the installation of radios and their addresses When transporting Modbus messages the master station radio must be programmed...
Страница 28: ...the event that no reply is received It is therefore essential that all radios in a system are programmed with the same parameters even if not power saved otherwise communications will fail Note that...
Страница 29: ...radio under the RADIO ADDRESS field in the setup program will be referred to as the radio address RFT Routing mode is controlled at the master station by picking out an 8 bit protocol address field i...
Страница 30: ...tes should be kept detailing the installation of radios and their addresses The master station radio must be programmed with a routing table this is accessed in the EDIT MODEM INTERFACE menu by settin...
Страница 31: ...e mode as long as DTR is not active asserting DTR wakes the radio DSR is asserted in return to indicate that the radio is awake and ready to accept data If use of the handshake lines is not required D...
Страница 32: ...power supply units are available with a in built charger and power fail indication A range of suitable Gel type batteries is available should a back up supply be required during power failures 7 3 EF...
Страница 33: ...nnas provide relatively high gain in the forward direction within a limited beamwidth and very good rejection of unwanted signals at the rear The number of elements and hence the size will depend on t...
Страница 34: ...performance of the system Hence the coax cable should be selected to give a low loss over the distance required For outstations in the local vicinity of the scanner base station the loss is not very...
Страница 35: ...adiated whereas a bad match will result in the reflection of a large amount of the power thereby reducing the transmitter s range A perfect match will give a 1 1 ratio and bad match will give 2 1 or h...
Страница 36: ...ZRT Manual Page 36 of 37 Rev J 11 September 2008...
Страница 37: ...11 September 2008 RF DataTech is a trading division of R F Technologies Ltd 27 29 New Road Hextable Kent BR8 7LS Tel 44 0 1322 614 313 Fax 44 0 1322 614 289 E Mail info rfdatatech co uk ADDITIONAL PRO...
