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Summary of Contents for RF Technology Eclipse T350
- Page 1 Eclipse Ser ies RF Technology rfinfo@rftechnology.com.au August, 1998 T350 / T500 Tr ansmitter Operation and Maintenance Manual This manual is produced by RF Technology Pty Ltd 10/8 Leighton Place, Hornsby NSW 2077 Australia Copyright © 1998 RF Technology...
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Page 2: Table Of Contents
Audio Signal Processing PTT and DC Remote Control 5.10 Micro-processor Controller 5.11 Voltage Regulator Field Alignment Pr ocedur e Standard Test Conditions VCO Alignment TCXO Calibration Modulation Balance Tone Deviation Deviation Line Input Level Output Power Page 2 RF Technology T350/T500... - Page 3 T/R Relay Driver 7.4.20 Channel Select Input / Output 7.4.21 DC Remote Keying 7.4.22 Programmable No-Tone Period 7.4.23 Firmware Timers 7.4.24 CTCSS Connector s 7.5.1 Antenna Connector 7.5.2 Power and I/O Connector 7.5.3 Test Connector RF Technology T350/T500 Page 3...
- Page 4 CONTENTS CONTENTS Engineer ing Diagr ams Block Diagram Circuit Diagrams Component Overlay Diagrams Par ts List Page 4 RF Technology T350/T500...
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Page 5: Oper Ating Instr Uctions
1 OPERATING INSTRUCTIONS WARNING Changes or modifications not expressly approved by RF Technology could void your authority to operate this equipment. Specifications may vary from those given in this document in accordance with requirements of local authorities. RF Technology equipment is subject to... -
Page 6: Power Led
5 and higher use the cadence of the LED flash sequence to indicate the alarm condition. Refer to table 1. Receivers using software issue 4 and lower use the LED flash rate to indicate the alarm condition. Refer to table 2. Page 6 RF Technology T350/T500... -
Page 7: Tr Ansmitter Inter Nal J Umper Options
Either the 600W or the high-Z balanced inputs may be selected. Condition Position 2-3 * 600W Input High-impedance Input J P6: Input Level Attenuation This jumper permits coarse input sensitivity to be set. Condition Position 0dB attenuation 1-2 * 20dB attenuation RF Technology T350/T500 Page 7... -
Page 8: Jp7: Audio Response
TecHelp can be supplied by your dealer, distributor or by contacting RF Technology directly. Page 8 RF Technology T350/T500... -
Page 9: Cir Cuit Descr Iption
The VCO is keyed ON by the microcontroller through Q10. It is keyed ON when any of the PTT inputs are active and OFF at all other times. RF Technology T350/T500 Page 9... -
Page 10: Pll Section
U1a and U1b. The forward and reverse voltages from U1a and U1b are compared to the DC reference voltage from RV1. The difference is amplified by U1c, Q3 and Q4. Page 10 RF Technology T350/T500... -
Page 11: 600W Line Input
The selected source is coupled to U9c which is a balanced input unity gain amplifier. The buffered tone from U9c is fed to 300 Hz low pass filter U7c. RV3, the tone deviation trimmer, is used to adjust the level of the tone RF Technology T350/T500 Page 11... -
Page 12: Audio Signal Processing
Opto-isolator ISO1 is used to isolate the loop current signal from the transmitter PTT logic. The loop current passes through the input of ISO1 and the output of ISO1 connects to the PTT logic. Page 12 RF Technology T350/T500... -
Page 13: Micro-Processor Controller
U14 which is run from the regulated 9.4 Volt supply. Field Alignment Pr ocedur e The procedures given below may be used to align the transmitter in the field. Normally, alignment is only required when changing operating frequencies, or after component replacement. RF Technology T350/T500 Page 13... -
Page 14: Standard Test Conditions
TCXO Calibr ation 1. Select a channel at the center frequency (half way between the highest and lowest frequencies for the model in question). 2. Disconnect the Audio input (no signal input). 3. Key the PTT line. Page 14 RF Technology T350/T500... -
Page 15: Modulation Balance
Adjust RV3 for the desired deviation in the range 0-1kHz. If sub-tone (CTCSS) coding is not to be used, adjust RV3 fully CCW. ____________________ The factory default is 500Hz for wide band (5kHz maximum deviation) and 250Hz for narrow band channels. RF Technology T350/T500 Page 15... -
Page 16: Deviation
1.5dB cable and connector losses, and assume that the maximum rated power is 15W. This means no more than 10W at the end of a 1m length of test cable. This pessimistic procedure is safe on all models manufactured at the time of writing. Page 16 RF Technology T350/T500... -
Page 17: Specifications
7.1.3 Channel Pr ogr amming The channel information is stored in non-volatile memory and can be programmed via the front panel test connector using a PC and RF Technology software. 7.1.4 Channel Selection Channel selection is by eight channel select lines. These are available through the rear panel connector. -
Page 18: Micro-Processor
7.1.5 Microprocessor 7.1.5. Micr opr ocessor A microprocessor is used to control the synthesizer, tone squelch, PTT function and facilitate channel frequency programming. With the standard software, RF Technology modules also provide fault monitoring and reporting. Physical Configur ation The transmitter is designed to fit in a 19 inch rack mounted sub-frame. The installed height is 4 RU (178 mm) and the depth is 350 mm. -
Page 19: Electr Ical Specifications
±1 ppm over 0 to +60 C, standard ±1ppm over -20 to +60 C, optional 7.4.5 Number of Channels 100, numbered 00 - 99 7.4.6 Antenna Impedance 7.4.7 Output power Preset for 2-15 or 2-25W depending upon model RF Technology T350/T500 Page 19... -
Page 20: Transmit Duty Cycle
50dB referenced to rated system deviation. 7.4.14 600W Line Input Sensitivity Adjustable from -30 to +10 dBm for rated deviation 7.4.15 HI-Z Input Impedance - 10KW Nominal, balanced input Input Level - 25mV to 1V RMS Page 20 RF Technology T350/T500... -
Page 21: Test Microphone Input
7.4.21 DC Remote Keying An opto-coupler input is provided to enable dc loop keying over balanced lines or local connections. The circuit can be connected to operate through the 600W line or through a separate isolated pair. RF Technology T350/T500 Page 21... -
Page 22: Programmable No-Tone Period
Tone frequencies are given in table 4. Connector s 7.5.1 Antenna Connector Type N Female Mounted on the module rear panel The reverse phase burst is usually sufficient to eliminate squelch tail noise in higher-quality mobiles Page 22 RF Technology T350/T500... - Page 23 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 Table 4: Tone Squelch Fr equencies 233.6 241.8 250.3 254.1 RF Technology T350/T500 Page 23...
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Page 24: Power And I/O Connector
(exciter) PCB. Figure 3 shows the detailed circuit diagram with component numbers and values for the higher-power PA variation. Figure 4 shows the detailed circuit diagram with component numbers and values for the lower-power PA variation. Page 24 RF Technology T350/T500...
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