Eclipse Series RF Technology rfinfo@rftechnology.com.
CONTENTS CONTENTS 1 Operating Instructions 1.1 Front Panel Controls and Indicators 1.1.1 Mon Volume 1.1.2 Mon. Sq 1.1.3 N. Sq 1.1.4 C. Sq 1.1.5 Line 1.1.6 PWR LED 1.1.7 SQ LED 1.1.8 Alarm Led 4 4 4 4 4 5 5 5 5 5 2 Receiver Internal Jumper Options 2.1 JP1: 240Hz Notch Filter 2.2 JP2: Audio Response 2.3 JP3: Audio Filter In/Out 2.4 JP4: 600 Ohm Line dc Loop COS 2.5 JP6: COS Polarity 2.6 JP7, JP8, JP9 dc Loop COS Configuration (JP4 1-2) 2.7 JP7, JP8, JP9 Direct Output COS (JP4 2-3) 2.
CONTENTS 7.1.2 7.1.3 7.1.4 7.1.5 CONTENTS CTCSS Channel Programming Channel Selection Microprocessor 15 15 15 15 7.2 Physical Configuration 16 7.3 Front Panel Controls, Indicators and Test Points 7.3.1 Controls 7.3.2 Indicators 7.3.3 Test Points 16 16 16 16 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 Nominal Antenna Impedance 7.4.6 IF Frequencies 7.4.7 Sensitivity 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 and Indicators 1.1.
1.1.4 C.SQ 1 OPERATING INSTRUCTIONS 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 1-200µV input It is provided mainly for use in fixed link applications where a high minimum signal to noise ratio is required or where very fast squelch operation is required for data transmission. The carrier squelch will open and close in less than 2 mSec.
2 RECEIVER JUMPER OPTIONS Flashing 1 time, pause LED ON continuously 2.1 JP1 -240Hz Notch Filter dc supply voltage low or high External squelch is active 2 Receiver Internal Jumper Options In the following subsections an asterisk (*) signifies the standard (Ex Factory) configuration of a jumper. 2.1 JP1 - 240 Hz Notch Filter Condition Notch filter In Notch Filter Out Position 1-2* 2-3 2.2 JP2 Audio Response Condition 750µSec de-emphasis Flat response Position 1-2* 2-3 2.
2.7 Direct Output COS 2 RECEIVER INTERNAL JUMPER OPTIONS 2.7 JP7, JP8, JP9 Direct Output COS (JP4 2-3) Condition +12 Vdc Direct Output Free Switch Output 2.
3 RECEIVER CONNECTIONS 3.1.25 Pin Connector 3 Receiver I/O Connections 3.1 25 Pin Connector The D-shell 25 pin connector is the main interface to the receiver. The pin connections are described in table 3.
5.1 RF Section 5 CIRCUIT DESCRIPTION . TecHelp/ Service Monitor 2000 can be supplied by your dealer, distributor or by contacting RF Technology direct. 5 Circuit Description The following description should be read as an aid to understanding the block and schematic diagrams at the rear of this manual. 5.1 RF Section A two section helical filter FL1 is used to limit the R.F. bandwidth prior to the R.F. amplifier transistor Q1.
5 CIRUCIT DESCRIPTION 5.3.0 VCO Section The limiter/discriminator I.C. U3 further amplifies the signal and passes it through CF2. CF2 does not contribute to the adjacent channel rejection but is used to reduce the wide band noise input to the limiter section U3. The limiter section of U3 drives the quadrature detector discriminator. C31 and I.F. tuned circuit L10 comprise the discriminator phase shift network. U3 also has a received signal strength indicator output (RSSI).
5.6 Noise Filter, Amplifier and Detector 5 CIRCUIT DESCRIPTION the audio to the line and monitor output circuits. The monitor output can be set for noise squelch only operation by S1. The audio from U17a is adjusted by the volume control before connecting to the monitor output amplifier U5. U5 drives the internal speaker and can also supply 3-5 watts to an external loudspeaker. The audio from U17b is adjusted by RV3 before connecting to the line output I.C. (U22a,b).
5 CIRCUIT DESCRIPTION 5.10 Carrier Operated Switch 5.9 Microprocessor Controller The microprocessor controller circuit uses an advanced eight bit processor and several support chips. The processor U15 includes EE memory for channel frequencies, tones and other information. It also has an asynchronous serial port, a synchronous serial port and an analog to digital convertor. The program is stored in U12, a CMOS EPROM. U13 is an address latch for the low order address bits.
6.1 Standard Input Signal 6 ALIGNMENT PROCEDURE TCXO calibration may be required periodically due to crystal aging. The aging should be less than 1ppm/year. 6.1 Standard Input Signal RF Signal Generator 50? output impedence Frequency range 806-950MHz FM modulation at 1KHz 1.5KHz peak for 12.5KHz channel spacing 3.0KHz peak for 25KHz channel spacing 6.2 RF Alignment Step 1 2 Input Select alignment frequency channel Signal generator on centre frequency channel to J1. Modulation off.
6.3 IF Alignment 6 ALIGNMENT PROCEDURE 6.3 IF Alignment Step 1 2 3 4 5 6 7 Input Signal generator on centre frequency channel to J1. Modulation OFF. As above Set generator level to 10uV Set generator level to 1 millivolt. Modulation ON As Above As above Set generator level to approx 0.25uV Measure dc Volts on test socket pin 7 to pin 1 Adjust Generator level to read 2-3Vdc. As above L5,L6,L7,L8 For max.
7 SPECIFICATIONS 7 Specifications 7.1 General Description The receiver is a high performance, frequency synthesized, narrow band FM unit which can be used in conjunction with transmitter and power supply modules as a base station or as a stand alone receiver. All necessary control and 600 Ohm line interface circuitry is included. 7.1.1 Channel Capacity Although most applications are single channel, it can be programmed for up to 100 channels numbered 0-99.
7.2 Physical Configuration 7 SPECIFICATIONS 7.2 Physical Configuration The receiver is designed to fit in a 19 inch rack mounted frame. The installed height is 4RU (178mm) and the depth 350mm. The receiver is 63.5mm or two eclipse modules wide. 7.3 Front Panel Controls, Indicators and Test Points 7.3.1 Controls Mute Defeat Switch - toggle (Overrides CTCSS and carrier squelch at the monitor output). Monitor Speaker Volume - Knob Line Output Level - Screwdriver adjust multiturn pot Noise Sq.
7 SPECIFICATIONS 7.4.2 Frequency Range and Channel Spacing 7.4.2 Frequency Range and Channel Spacing Frequency 800-830MHz 850-870MHz 896-930MHz Model No. 25KHz R800A R800B R800C 12.5KHz R800AN R800BN R800CN 7.4.3 Frequency Synthesizer Step Size -10.0 or 12.5KHz 7.4.4 Frequency Stability +/- 1ppm, 0 to +60C, Standard 7.4.5 Nominal Antenna Impedance 50 Ohms 7.4.6 IF Frequencies 1st IF Frequency 45MHz 2nd IF Frequency 455KHz 7.4.7 Sensitivity 0.25uV (-119dBm) for 12dB SINAD 0.
7.4.11 Modulation Acceptance BW 7 SPECIFICATIONS 7.4.11 Modulation Acceptance BW 25KHz spacing - 7.5KHz per EIA-603 12.5KHz spacing - 3.75KHz per EIA-603 7.4.12 Noise Squelch Adjustment Range 6-26dB SINAD, 25KHz Versions 6-18dB SINAD, 12.5KHz Versions Attack Time 20mSec. above 20dB Quieting Release Time 150mSec. at 20dB quieting decreasing to 20mSec. above 2uV present threshold Hysteresis Hysteresis is equal to approximately 2dB change in noise quieting. 7.4.
7 SPECIFICATIONS 7.4.18 Audio Distortion Discriminator and Sub-Audio Level: Nominally equal to 1 volt peak at rated system deviation. 7.4.16 Audio Distortion With 750uSec. De-Emphasis: Less than 3% at 1KHz and 60% of rated system deviation. With Flat Response: Less than 5% at 1KHz and 60% of rated system deviation. 7.4.17 Channel Select Input/Output Coding: 8 Lines BCD coded 00-99 Logic Input Levels: 0=<0.4Volts 1=>3.5Volts Internal 10K pull down resistors selects Ch.00 when all inputs are O/C. 7.4.
7.4.21 CTCSS 7 SPECIFICATIONS 7.4.21 CTCSS The CTCSS decoding is provided by a hybrid module. This provides programmable decoding of all 38 EIA and 12 other common tones. TONE SQUELCH FREQUENCIES Tone Fre q. EIA# Tone Freq. EIA# Tone Freq. EIA# No Tone 114.8 A6 179.9 B12 67.0 A1 118.8 B6 183.5 69.4 123.0 A7 186.2 A13 71.9 B1 127.3 B7 189.9 74.4 C1 131.8 A8 192.8 B13 77.0 A2 136.5 B8 196.6 79.7 C2 141.3 A9 199.5 82.5 B2 146.2 B9 203.5 A14 85.4 C3 151.4 A10 206.5 88.5 A3 156.7 B10 210.7 B14 91.5 C4 159.
