Eclipse Series RF Technology rfinfo@rftechnology.com.
CONTENTS CONTENTS Contents 1 Operating Instructions 1 1.1 Front Panel Controls 1.1.1 MON. Volume 1.1.2 MON. SQ 1.1.3 N. SQ 1.1.4 C. SQ 1.1.5 LINE 1.2 Front Panel Indicators 1.2.1 PER LED 1.2.2 SQ LED 1.2.3 ALARM LED 4 4 4 4 5 5 5 5 6 6 2 Receiver Options 2.1 Serial I/O Parameters 2.2 Receiver Low Battery Level 2.3 Audio High Pass (Notch) Filter 2.4 Audio Response 2.5 LOOP VOLTS Select 2.6 COS Polarity Select 2.7 COS Source/Sink Select 2.
CONTENTS 7.1.2 7.1.3 7.1.4 7.1.5 CONTENTS CTCSS Channel Programming Channel Selection Microprocessor 21 21 21 22 7.2 Physical Configuration 22 7.3 Front Panel Controls, Indicators and Test Points 7.3.1 Controls 7.3.2 Indicators 7.3.3 Test Points 22 22 22 22 7.4 Electrical Specifications 7.4.1 Power Requirements 7.4.2 Frequency Range and Channel Spacing 7.4.3 Frequency Synthesizer Step Size 7.4.4 Frequency Stability 7.4.5 Number of Channels 7.4.6 RF Input Impedance 7.4.7 IF Frequencies 7.4.
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 continual improvement and RF Technology reserves the right to change performance and specification without further notice. 1 Operating Instructions 1.1 Front Panel Controls 1.1.1 MON. Volume The Mon.
1 OPERATING INSTRUCTIONS 1.1.4 C. SQ (c) In the absence of any on channel signal, Turn the N.SQ. screw clockwise until the until the noise in the speaker is muted. Then turn the screw two additional turns in the clockwise direction. 1.1.4 C.SQ The C.SQ trimpot is used to set the carrier squelch sensitivity. Carrier squelch is useful at higher signal levels than noise squelch and can be used from 1 - 200 uV input.
2 RECEIVER OPTIONS 1.2.2 SQ LED 1.2.2.1 SQ LED The SQ LED comes on when the audio to the line and direct outputs is un-squelched. The LED and squelch function are controlled by noise, carrier and tone squelch circuits. 1.2.3 ALARM LED The ALARM LED can indicate several fault conditions if they are detected by the self test program. The alarm indicator shows the highest priority fault present. See Table 1.
2 RECEIVER OPTIONS 2.2 Receiver Low Battery Level 2.2 Receiver Low Battery Level This is factory set to 24.0V, and defines the level of the DC supply that will cause an Receiver dc supply low alarm. 2.3 Audio High Pass (Notch) Filter At the audio output ports, the sub tone (CTCSS) can be notched by a high pass filter, this high pass filter can be software selected as enable or disable (the filter was bypassed). The default factory setting is audio high pass filter enable. 2.
3 RECEIVER I/O CONNECTIONS 3.1 25 Pin Connector maximum line deviation to use, what tone deviation to use, what transmit delay (a delay applied from PTT-in or LOOP-in to transmission), what transmit tail (delay from PTT-in, or LOOP-in, to transmission being stopped, and No-TONE period (a period of extra transmission in which No Tone is applied after PTT-in or LOOP-in has been released.
4 CHANNEL PROGRAMMING AND OPTIONS SELECTIONS 3.2 9 Pin Front Panel Connector The female D-shell, 9 pin, front panel connector is an RS232 interface for serial communications to a terminal, a terminal emulator, or to a computer. The pin connections are described in table 4.
4 CHANNEL PROGRAMMING AND OPTION SELECTIONS R50> read par parameter_name Where "parameter_name" is one of the following: Parameter Name Parameter Function Default Value LOOP_GEN Generate a LOOP Off potential (see 2.5) PA_LOW_BAT BAUD_RATE0 Low Battery Alarm 20.0 (Volts) Level (see 2.4) Port 0 Baud Rate 57600 (BPS) PARITY0 Port 0 Parity FLOW_CONTR OL Port 0 Flow Control Parameter Range Text: Off or On Floating Point Number < 32.
5 CIRCUIT DESCRIPTION 5.1 R50 Master Schematic (Sheet 1) Field2: Transmit Frequency(in MHz) if the exciter is keyed up by anything but PTT-in being asserted. This is 35.0 MHz in the example. Field3: CTCSS Tone(in Hz) if PTT-in is asserted. This is 100Hz in the example. Field4: CTCSS Tone(in Hz) if the exciter is keyed up by anything but PTT-in being asserted. This is 120Hz in the example.
5.2 Microprocessor (Sheet 2) 5 CIRCUIT DESCRIPTION P3 represents the rear female DB25 connector. J1 is the terminal on print circuit board, it is connected to the internal load speaker. JP2 is for the attachment of an LCD display module. This has been included for later development. JP3 is a specialised connector for test and factory configuration use only. D102, D103, and D104 represent the three front panel LEDs. 5.2 Microprocessor (Sheet 2) Sheet 2 describes the basic microprocessor circuitry.
5 CIRCUIT DESCRIPTION 5.2 Microprocessor (Sheet 2) LINE_LEVEL_U/D and LINE_LEVEL_INC are CPU outputs which are reserved for controlling a digital potentiometer in future. COS_VOLTS_ON/OFF is a CPU output that when high applies 12VDC feed to COS+ terminal, so that the COS can be selected as +12VDC source or a free switch. COS_POLARITY is CPU output that when low turns Opto-coupled transistor switch U601on.
5.3 RF Section (Sheet 3) 5 CIRCUIT DESCRIPTION DBGTX_TTL, DBGRX_TTL are RS232 transmit and receive (TTL) data pins which are connected to the debug port after conversion to/from RS232 compatible voltage levels by U202 and U201. TXD_TTL, RXD_TTL, RTS_TTL, CTS_TTL, DTR_TTL, DSR_TTL, are RS232 data pins which are connected to the main front panel serial port after conversion to/from RS232 compatible voltage levels by U202 and U201. N_DET is used to sense the noise squelch output of the receiver section.
5 CIRCUIT DESCRIPTION 5.4 Receiver Section (Sheet 4) voltage. OUTD (pin15) is used to set the LCD bias voltage, this feature is not used in this version. Communication between U301 and MicroController U204 is via the serial bus. U302 is a dual channels PLL chip, X301 is the reference for both PLL channels, PLL channel 1 is for the 1st VCO, channel 2 is for the 2nd VCO.
5.5 Voltage Controlled Oscillator (Sheet 5) 5 CIRCUIT DESCRIPTION Pin8 of U401 is the other recovered audio output which can be muted by pin5, discriminated audio signal is amplified by U605A to a sufficient level for line level detector, then fed into Audio Section (Sheet 6). Pin7 of U401 is the Radio Signal Strength Indicator (RSSI) output, U402D is a buffer for send RSSI voltage to MicroController.
5 CIRCUIT DESCRIPTION 5.7 Power Generator Section (Sheet 7) U609B, U607A and U607B are working as a flat/de-emphasis response switch, it can be selected by control signal FLAT and DE_EMPHA from the MicroController U204. U607D and U607C is the squelch switch for line output and speaker. U609C is the amplifies for 600W line output, U609D is the amplifier for direct audio output, the output level of 600W line an direct audio are adjustable via VR601 on the front panel.
6 FIELD ALIGNMENT (CALIBRATION) PROCEDURE D911 is a 4.096V (3%) reference diode. Its output is buffered by U906 which then produces a reference voltage rail Vref, which is used by the CPU's A/D converter, and the DACs. 6 Field Alignment (Calibration) Procedure 6.1 Standard Test Equipment Some, or all of the following equipment will be required: Power supply set to 28Vdc, with current >1A.
6 FIELD ALIGNMENT (CALIBRATION) PROCEDURE 6.3 The "Miscellaneous" Calibration Procedure R50> cal misc This procedure should not normally be invoked as part of any field maintenance. The program will print out the Model Name and Serial Number of the exciter. If these parameters haven't already been defined (e.g. at an initial calibration, at the factory, the service personnel will be prompted to enter these values). Then it will ask the operator to enter the value of Vref (as measured at TP913, see 5.7).
6 FIELD ALIGNMENT (CALIBRATION) PROCEDURE 6.4 Line Calibration Procedure R50> cal line This procedure is used for calibrating the RF RSSI level reading, FM modulation (deviation) reading. Also this procedure is used to set the 600 Ohm audio line output level, Noise squelch level and Carrier squelch level. Simply follow the instruction of the software as bellow: Attach an RF signal generator to the input. Set the RF output to 37.5MHz, and an input level of -110dBm with a 1kHz tone and 3kHz deviation.
7 SPECIFICATIONS 7.1 Overall Description Measure the ECLK frequency, accurate to 0.5Hz and enter the result(in MHz, eg 7.3727965) Measure the E clock frequency again, and enter yes(y/Y) if less than 1Hz from prev. freq, or re-enter the frequency Connect an RF generator to the input and with output freq of 37.5MHz and output level of -100dBm Enter when done. 7 SPECIFICATIONS 7.
7 SPECIFICATIONS 7.1.5 Microprocessor 7.1.5 Microprocessor A microprocessor is used to control the synthesizer, tone squelch, calibration, fault monitoring and reporting, RSSI reading, deviation measuring, option setting and facilitate channel frequency programming. 7.2 Physical Configuration The receiver 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. The receiver is 63.5 mm or two Eclipse modules wide. 7.
7 SPECIFICATIONS 7.4.1 Power Requirements 7.4 Electrical Specifications 7.4.1 Power Requirements Operating Voltage - 16 to 32 Vdc Current Drain - 0.5A Maximum Polarity - Negative Ground 7.4.2 Frequency Range and Channel Spacing The R50, as a single model, covers the full band, currently the R50 receiver works in 20KHz and 25KHz channel spacing. It can also work in as low as 6.25KHz channel spacing if the narrow band-width IF filter is used. 7.4.
7 SPECIFICATIONS 7.4.8 Sensitivity 7.4.8 Sensitivity -119 dBm for 12dB SINAD -116 dBm for 20dB Quieting 7.4.9 Selectivity 80dB per RS204C 7.4.10 Spurious and Image Rejection 90dB 7.4.11 Intermodulation 80dB 7.4.12 Modulation Acceptance BW 7.5KHz 7.4.13 Noise Squelch (a) Adjustment rang 6-26dB SINAD (b) Attack time 20mSec. Above 20dB Quieting (c) Release Time 2uV preset threshold 150mSec. At 20dB Quieting decreasing to 20mSec.
7 SPECIFICATIONS 7.4.16 7.4.16 Receiver Conducted Spurious Emission Receiver Conducted Spurious Emission Less than -67dBm from 1 to 3000MHz 7.4.17 Audio Frequency Response (a) 600 Ohm Line and Direct Output +1/-3 dB 300 - 3000 Hz relative to either a flat response or 750 uSec. de-emphasis (b) Sub-Audio Output +1/-3dB 67 - 250 Hz 7.4.18 Audio Output Level (a) 600 Ohm Line Adjustable -10 to +10 dBm (b) Monitor Loudspeaker 5 Watts with external speaker, 0.
7.4.21 Carrier Operated Switch Output 7.4.21 7 SPECIFICATIONS Carrier Operated Switch Output Floating Opto-Coupler Output The carrier operated switch output is via an Opto-coupler. Collector and emitter connections are available to allow connection for source or sink. The Opto-coupler can be linked inside the receiver to be on when a carrier is detected or to be on in the absence of carrier.
7 SPECIFICATIONS 7.5.3 7.5.
APPENDIX A APPENDIX A EIA CTCSS TONE FREQUENCIES Frequency No Tone 67.0 69.4 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 162.2 167.9 173.8 179.9 186.2 192.8 203.5 210.7 218.1 225.7 233.6 241.8 250.
R50 PARTS LIST B R50 Parts List Main PCB Assembly Parts Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref. Description Part Number C445 C446 C447 C448 C449 C450 C451 C452 C453 C454 C455 C456 C457 C458 C459 C460 C461 C462 C463 C464 C466 C467 C468 C469 C470 C471 C473 C474 C475 C476 C477 C478 C479 C480 C481 C482 C483 C484 C485 C486 C487 C488 C489 C491 C492 C493 C494 C495 C496 C501 C503 Capacitor 68P+/-5% NPO 50V 0603 Capacitor 120P+/-5% NPO 50V 0603 Capacitor 47P+/-5% NPO 50V 0603 Capacitor 5P6+/-0.25 NPO 50V 0603 Capacitor 5P6+/-0.25 NPO 50V 0603 Capacitor 2P7+/-0.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref. Description Part Number C559 C560 C561 C563 C564 C601 C602 C604 Capacitor Electrolytic 10U 16V 6032 Capacitor Electrolytic 10U 16V 6032 Capacitor 4P7+/-0.25 NPO 50V 0603 Capacitor 150P+/-5% NPO 50V 0603 Capacitor 22P+/-5% NPO 50V 0603 Capacitor 1U+80/-20% Y5V 25V 1206 Capacitor 1U+80/-20% Y5V 25V 1206 Capacitor Electrolytic BIPOL 50V 22U+/-20% RB.2.
R50 PARTS LIST Ref. Description Part Number C930 C931 C933 C935 C936 C937 C938 C939 C940 C941 C943 D102 D103 D104 D200 D301 D401 D403 D404 D405 D406 D407 D501 D502 D503 D504 D601 D602 D603 D604 D605 D906 D907 D908 D909 D910 D911 Filter401 Filter402 Filter403 Filter404 Filter405 JP2 JP3 L100 L101 L102 L200 L202 Capacitor Electrolytic 10U 16V 6032 Capacitor 100N+80/-20% Y5V 25V 0603 Capacitor 100N+80/-20% Y5V 25V 0603 Capacitor Electrolytic L ESR 470U 35V RB.2/.
R50 PARTS LIST Ref. Description Part Number L203 L204 L205 L301 L401 L402 L403 L404 L405 L406 L407 L408 L409 L410 L411 L412 L413 L414 L417 L419 L420 L421 L422 L423 L424 L425 L426 L501 L502 L503 L504 L505 L506 L507 L509 L510 L511 L512 L514 L515 L516 L901 L902 L903 L904 L905 L906 L907 L908 L909 MA501 Ferrite Bead .5A 1206 Ferrite Bead .5A 1206 Ferrite Bead .5A 1206 Ferrite Bead .
R50 PARTS LIST Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref.
R50 PARTS LIST Ref. Description Part Number U914 VR201 VR202 VR601 X200 X301 X401 X402 X601 IC Volt Regulator Negative ADJ LM337 SO8 Trimpot 100K Multi Turn Horizontal Trimpot 100K Multi Turn Horizontal Trimpot 100K Multi Turn Horizontal Crystal Resistor 14.7456MHZ SMD Crystal Resistor 12MHZ SMD Ceramic Discriminator SMD Crystal Resonator 21.