Tactical Electronics T400B UHF TRANSCEIVER User Manual T400
Tactical Electronics Corporation UHF TRANSCEIVER T400
USERS MANUAL
T400 TRANSCEIVER OPERATING INSTRUCTIONS 1892 1144 These operating instructions are intended to provide the user with sufficient information to install and operate the unit correctly. The Tactical Electronics T400 synthesized UHF transceiver is intended to fulfil the numerous OEM applications by virtue of its reliable design, miniature size and quality manufacture. INSTALLATION The T400 is intended to fit easily and with minimum space requirements into the user's own equipment housing. The complete module is housed in a tin-plated enclosure and is secured by means of four 10mm sheet metal screws which locate in the four corners through the lower screening cover. DO NOT overtighten these screws during installation. INTERFACE The radio antenna connects by means of a BNC miniature coaxial connector. All other connections to the T400 transceiver are made using a standard 9-way D type connector as detailed in the table below. PIN NAME FUNCTION REMARKS MOD I/P Modulation input RX O/P Receiver Output Analog (350mV p-p) or 5V CMOS levels, high ( +5V) when no signal present (factory set) bX bE transmit enable HIGH >2.5V = receive LOW <0.8V = transmitter enabled 0V 0 volts common DC and signal ground + Vin positive supply +10 to +14 V DC SQF Squelch flag output HIGH (+5V, 10kS pull-up) = Signal present LOW (<0.8V) = Signal not present CS RSSI 0V To transmitter; Analog (750mV p-p for nominal deviation) or TTL/CMOS compatible (factory set) channel select Serial channel select input (RS232 compatible) Received Signal Strength Indicator +1 to +3V DC nominal, 50dB range 0 volts common DC and signal ground OPTIONS Channel spacing The T400 is available in the channel spacings as detailed in the table. The code designations form part of the product variant type. This is shown on the label fixed to the 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 SPACING 12.5kHz 25kHz 430 - 450 31 33 450 - 470 51 53 RF connection As well as the standard BNC coaxial connector, the T400 is also available with a SMB or flying lead RF connection. Contact Tactical Electronics for details. CHANNEL SELECTION The software supplied with the T400 transmitter is the TPRG.exe program. The software can be run on a PC with the serial port connected to pin 7 of the transmitter via a suitable adaptor as shown in Figure 1. The unit may be programmed in-situ provided that pin 7 is available. There is no feed-back facility with this circuit, and for this 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 1200 baud. Each packet includes a 16 bit sync code and an 11 bit checksum to eliminate the possibility of spurious programming. Figure 1 Programming adaptor RUNNING THE SOFTWARE Please note that mouse operation is not supported with this program 1. Connect the TX00 transceiver to a suitable supply and to the PC using the programming adaptor. 2. Insert the TPRG disk into drive A and type: A:TPRG3. The user is then prompted to enter the serial port number of his PC which is used 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 INFORMATION The following table gives an indication of the typical ranges to be expected between a transmitter and receiver that have simple end-fed dipole antennas. The following assumptions have been made in the calculations: line-of-sight between antennas 0dB gain for the transmitter and receiver antennas 0dB loss for connectors and cables between the antenna and the radio connector 20dB fade and environmental margin -100dBm received signal strength, allowing for digital and analog signals Range versus TX power Frequency (MHz) Power (mW) Power (dBm) Range (km) 458.5 1mW 0.5 458.5 10mW 10 1.7 458.5 100mW 20 5.3 458.5 500mW 27 11.9 TECHNICAL SPECIFICATION Frequency of operation Channel spacing Number of RF channels RF output power Frequency stability Supply voltage Supply current Transmit Receive Size Weight Temperature (operating) Temperature (storage) 450 to 470MHz (other frequency bands available) 25kHz (12.5kHz available as an option) One, set by PIC micro controller 2W nominal at 12V DC ±2.5ppm over temperature range +12V DC nominal (+10 to +14 volts possible) 600mA typical at 2W 400mA typical at 1W 32mA typical 119 x 57 x 21mm (l x w x h) including connectors 120 gms -30 to +55 EC standard -30 to +70 EC
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