T200 TRANSCEIVER OPERATING INSTRUCTIONS These operating instructions are intended to provide the user with sufficient information to install and operate the unit correctly. The Tactical Electronics model T200 is a single channel synthesized transceiver which operates in the 216 to 219MHz frequency band. The unit is intended to fulfil the numerous OEM applications by virtue of its highly reliable design, miniature size and quality manufacture. INSTALLATION The T200 is intended to fit easily and with minimum space requirements into the user's own equipment housing. The complete module is housed within a tin-plated enclosure and is secured by means of four 10mm metal screws which locate in the four corners through the lower screening cover. DO NOT overtighten these screws during assembly. CONNECTION The radio antenna connects by means of a BNC miniature coaxial connector. All other connections to the T200 transceiver are made using a standard 9-way D type connector as detailed in the table below. PIN NAME FUNCTION REMARKS 1 2 3 4 5 6 7 8 9 MOD I/P Data modulation input To transmitter, TTL/CMOS compatible DATA O/P Receiver Output bT bX bE transmit enable 5V CMOS levels, high ( +5V) when no signal present 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 CS channel select RSSI Received Signal Strength Indicator HIGH (+5V, 10kS pull-up) = Signal present LOW (<0.8V) = Signal not present Serial channel select input (RS232 compatible)
+1 to +3V DC nominal, 50dB range 0V 0 volts common DC and signal ground PROGRAMMING The software supplied with the T200 transmitter is the single channel 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. RUNNING THE SOFTWARE Please note that mouse operation is not supported with this program Figure 1 Programming adaptor 1. Connect TX00 to a suitable supply and to the PC using the programming 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 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 Frequency (MHz) Range versus TX power Power (mW) Power (dBm) Range (km) 173 173 173 173 1mW 10mW 100mW 500mW 0 10 20 27 1.4 4.4 13.8 30.9 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) :
216 to 219MHz (other frequency bands available) 12.5kHz (25kHz available as an option) One, set by PIC micro controller (contact Sales Office for serial channel select option) 2W nominal at 12V DC 2.5ppm over temperature range (12.5kHz version)
+12V DC nominal (+10 to +14 volts possible) 500mA typical at 2W 50mA typical 119 x 57 x 21mm (l x w x h) including connectors 120 gms
-30 to +55 C standard
-30 to +70 C