Tactical Electronics T400B UHF TRANSCEIVER User Manual T400

Tactical Electronics Corporation UHF TRANSCEIVER T400

USERS MANUAL

T400 TRANSCEIVEROPERATING INSTRUCTIONS1892 1144These operating instructions are intended to provide the user with sufficient informationto install and operate the unit correctly. The Tactical Electronics T400 synthesized UHF transceiver is intended to fulfil thenumerous OEM applications by virtue of its reliable design, miniaturesize and quality manufacture. INSTALLATIONThe T400 is intended to fit easily and with minimum space requirements into the user'sown equipment housing. The complete module is housed in a tin-plated enclosure andis secured by means of four 10mm sheet metal screws which locate in the four cornersthrough the lower screening cover. DO NOT overtighten these screws duringinstallation.
INTERFACEThe radio antenna connects by means of a BNC miniature coaxial connector. All otherconnections to the T400 transceiver are made using a standard 9-way D type connectoras detailed in the table below. PIN NAME FUNCTION REMARKS1MOD I/P Modulation input To transmitter;Analog (750mV p-p for nominaldeviation) orTTL/CMOS compatible (factory set)2RX O/P Receiver Output Analog (350mV p-p) or5V CMOS levels, high ( +5V) when nosignal present (factory set)3bTbXbEtransmit enable HIGH >2.5V = receiveLOW <0.8V = transmitter enabled40V 0 volts common DC and signal ground5+ Vin positive supply +10 to +14 V DC6SQF Squelch flag output HIGH (+5V, 10kS pull-up) = SignalpresentLOW (<0.8V) = Signal not present7CS channel select Serial channel select input (RS232compatible)8RSSI Received SignalStrength Indicator +1 to +3V DC nominal, 50dB range90V 0 volts common DC and signal ground
Figure 1 Programming adaptorOPTIONSChannel spacingThe T400 is available in the channel spacings as detailed in the table. The codedesignations form part of the product variant type. This is shown on the label fixed tothe top screening cover of the module.The T400 is FCC approved for 25Khz. The T400B is FCC approved for 12.5Khz. FREQUENCY RANGE(MHZ) CHANNEL SPACING12.5kHz 25kHz430 - 450 31 33450 - 470 51 53RF connectionAs well as the standard BNC coaxial connector, the T400 is also available with a SMBor flying lead RF connection. Contact Tactical Electronics for details.CHANNEL SELECTIONThe software supplied with the T400 transmitter is the TPRG.exe program. Thesoftware can be run on a PC with the serial port connected to pin 7 of the transmittervia a suitable adaptor as shown in Figure 1. The unit may be programmed in-situprovided that pin 7 is available. There is no feed-back facility with this circuit, and forthis reason, the TPRG software repeats the programming three times to eliminate error.This version of software is programmed by a series of 8 byte data packets at 1200baud. Each packet includes a 16 bit sync code and an 11 bit checksum to eliminate thepossibility of spurious programming.
RUNNING THE SOFTWAREPlease note that mouse operation is not supported with this program1. Connect the TX00 transceiver to a suitable supply and to the PC using theprogramming adaptor.2. Insert the TPRG disk into drive A and type:A:TPRG <return>3. The user is then prompted to enter the serial port number of his PC which isused to communicate with the TX00 transmitter. Enter 1 or 2.After the software has successfully loaded the screen displays the following prompts:Enter frequency in MHz?The user can then enter the required operating frequency and then ‘0' to quit.RANGE INFORMATIONThe following table gives an indication of the typical ranges to be expected between atransmitter and receiver that have simple end-fed dipole antennas.The following assumptions have been made in the calculations:line-of-sight between antennas0dB gain for the transmitter and receiver antennas0dB loss for connectors and cables between the antenna and the radioconnector20dB fade and environmental margin-100dBm received signal strength, allowing for digital and analog signalsRange versus TX powerFrequency (MHz) Power (mW) Power (dBm) Range (km)458.5 1mW 00.5458.5 10mW 10 1.7458.5 100mW 20 5.3458.5 500mW 27 11.9
TECHNICAL SPECIFICATIONFrequency of operation :450 to 470MHz (other frequency bands available)Channel spacing :25kHz (12.5kHz available as an option)Number of RF channels :One, set by PIC micro controllerRF output power :2W nominal at 12V DCFrequency stability :±2.5ppm over temperature rangeSupply voltage :+12V DC nominal (+10 to +14 volts possible) Supply currentTransmit :600mA typical at 2W400mA typical at 1WReceive :32mA typicalSize :119 x 57 x 21mm (l x w x h) including connectorsWeight :120 gmsTemperature (operating) :-30 to +55 EC standardTemperature (storage) :-30 to +70 EC

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