Eclipse Ser ies RF Technology rfinfo@rftechnology.com.
CONTENTS CONTENTS 1. Operating Instructions 1.1 Front Panel controls and Indicators 1.1.1 PTT 1.1.2 Line 1.1.3 PWR LED 1.1.4 TX LED 1.1.5 ALARM LED 1.1.6 ALC LED 1.1.7 REF LED 1.1.8 TEST MIC 5 5 5 5 5 5 6 6 6 6 2. Transmitter Internal J umper Options 2.1 JP2: EPROM Type 2.2 JP3: Dc Loop PTT 2.3 JP4: Audio Input source 2.4 JP5: 600 ¿ Termination 2.5 JP6: Input Level Attenuation 2.6 JP7: Audio Frequency Response 2.7 JP8: Subaudible Tone Source 2.
CONTENTS 6.5 6.6 6.7 6.8 7 CONTENTS Tone Deviation Deviation Line Input Level Output Power 19 20 20 20 Specifications 21 7.1 Overall Descr iption 7.1.1 Channel Capacity 7.1.2 CTCSS 7.1.3 Channel Programming 7.1.4 Channel Selection 7.1.5 Microprocessor 21 21 21 21 21 21 7.2 Physical Configuration 22 7.3 Front 7.3.1 7.3.2 7.3.3 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.
CONTENTS A Engineering Diagrams A1 Block Diagram A2 Circuit Diagram A3 Component Overlay Diagram B Parts List CONTENTS ___________________________________________________________________________ RF Technology T800 Page 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 Oper ating Instr uctions 1.1 Fr ont Panel Contr ols and Indicator s 1.1.
1.1.5 Alarm LED 1.1.5 1 OPERATING INSTRUCTIONS 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. Receivers using software issue 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.
2 TRANSMITTER INTERNAL JUMPER OPTIONS 2 Tr ansmitter Inter nal J umper Options In the following subsections an asterisk (*) signifies the standard (Ex-Factory) configuration of a jumper. 2.1 J P2: EPROM Type Condition 27C256 27C64 2.2 Position 2-3 * 1-2 J P3: 600 Ohm Line Dc Loop PTT Input By default, Eclipse exciters can be keyed up by pulling the PTT signal low, or by dc loop signalling on the audio pair. This jumper enables or disables this second method.
2.5 JP6: Input Level Attenuation 2.5 2 TRANSMITTER JUMPER OPTIONS J P6: Input Level Attenuation This jumper permits coarse input sensitivity to be set. In the default position, the unit expects a line level of 0dBm (nominal) at its Line Input. In the alternate position, levels of +20dBm(nominal) can be accepted. Condition 0dB attenuation 20dB attenuation 2.6 Position 1-2 * 2-3 J P7: Audio Fr equency Response Condition 750 uSec. Pre-emphasis Flat Response 2.
2 TRANSMITTER INTERNAL JUMPER OPTIONS 2.10 JP17: Bypass Low Pass Filter cause excessive pulse edge distortion of the trunking controller’s digital signals. In such circumstances, JP16 allows a user to bypass the low and high pass filters in the tone input section. See also 2.12 - JP22: If direct tone input is selected, then JP22 should be removed (open) Condition Normal Tone Input Direct Tone Input Position 1-2* 2-3 2.
3.1 25 Pin Connector 3 TRANSMITTER I/O CONNECTIONS Condition Position No DMTX board 1-2, 5-6* DMTX board connected 2-3, 4-5 In addition to the jumper changes, a wire link or zero ohm resistor must be connected in the place marked for R159. 3 3.1 Tr ansmitter I/O Connections 25 Pin Connector The D-shell 25 pin connector is the main interface to the transmitter. The pin connections are described in table 3.
3 TRANSMITTER I/O CONNECTIONS 3.2 3.2 Rear Panel Connectors Rear Panel Connector s The exciter and receiver can be supplied with optional rear panel connectors that bring out the more important signals available on P1, the rear panel DB25 connector. Figures 1 and 2 show the rear panel connectors, and Table 4 shows the signals that are brought out to the spade connectors. The spade connectors (2.1x0.6x7mm) are captive/soldered at the labelled points.
4 CHANNEL and TONE FREQUENCY PROGRAMMING 4 Receiver DB25/F RX PCB DESCRIPTION TX PCB Tr ansmitter DB25/F 1, 14 +12V +12V DC SUPPLY +12V 1, 14 2 TXD TX Data TXD 2 15 RXD RX Data RXD 15 3 COR+ Carrier Operate Sw+ PressToTalk input PTT 3 16 COR- Carrier Operate Sw- Tx/Rx output T/R 16 4 TONE Subtone output Hi Z audio input+ AUD+ 4 17 AUDIO Audio output Hi Z audio input- AUD- 17 5 AGND Audio Ground Ext tone input+ TONE+ 5 18 DISC Discriminator output Ext to
5 CIRCUIT DESCRIPTION 5 5.1 VCO Section Cir cuit Descr iption The following descriptions should be read as an aid to understanding the block and schematic diagrams given in the appendix of this manual. 5.1 VCO Section The Voltage Controlled Oscillator uses a bipolar junction FET Q19 which oscillates at the required transmitter output frequency. Varactor diodes D25 and D26 are used by the PLL circuit to keep the oscillator on the desired frequency.
5.3 Power Amplifier 5 CIRCUIT DESCRIPTION The phase detector output signals of U6 are used to control two switched current sources. The output of the positive and negative sources Q3 and Q6, produce the tuning voltage which is smoothed by the loop filter components to bias the V.C.O. varactor diode D3. 5.3 Power Amplifier The 10 mW output from the main board connects to the power amplifier board through a short miniature 50Ω coaxial cable.
5 CIRCUIT DESCRIPTION 5.7 5.7 Local Microphone Input Local Micr ophone Input The local microphone input is provided for use with a standard low impedance dynamic microphone. The microphone output is amplified by U9a before connecting to analogue switch U10a. U10b inverts the local microphone PTT input to switch U10a ON when the microphone PTT button is pressed. U10a is OFF at all other times. The local microphone audio has priority over the other inputs.
5.10 PTT and DC Remote Control 5 CIRCUIT DESCRIPTION The composite audio from U7a is fed through the 3Khz low pass filter U7b. When the links on JP23 are in their default state, the filtered audio is coupled to the TCXO voltage tuning input and the modulation balance trimmer RV2. RV2, R99 and R98 attenuate the modulation signal before applying it to the VCO via varactor D3. When DMTX board option is required, Jumper JP23 allows the audio paths to be re-routed.
5 CIRCUIT DESCRIPTION 5.12 Voltage Regulator The program is stored in U5, a CMOS EPROM. U4 is an address latch for the low order address bits. U2 is used to read the channel select lines onto the data bus. U11 is an address decoder for U5 and U2. U3 is a supervisory chip which keeps the processor reset unless the +5 Volt supply is within operating limits. U1 translates the asynchronous serial port data to standard RS232 levels.
6.1 Standard Test Condition 6 FIELD ALIGNMENT PROCEDURE TCXO calibration may be periodically required owing to normal quartz crystal aging. A drift of 1ppm/year is to be expected. Each alignment phase assumes that the preceding phase has been successfully carried out, or at least that the module is already in properly aligned state with respect to preceding conditions. 6.
6 FIELD ALIGNMENT PROCEDURE 6.4 Modulation Balance 3. Key the PTT line. 4. Measure the carrier frequency at the output connector, and adjust XO1 until the correct carrier frequency is measured, ±50Hz. 6.4 Modulation Balance 1. Set RV3 fully counter clockwise (CCW) (sub-tone off). 2. Set RV1 fully clockwise (CW) (maximum deviation) 3. Set RV2 mid-position 4. Set JP7 for flat response 5. Set JP4 for Hi-Z input 6. Key the transmitter on 7. Set the audio input to 150Hz, 0dBm.(387mV) 8.
6.6 Deviation 6.6 Deviation 1. Set RV4 (Line Level) fully clockwise (CW). 2. Set the audio to 1kHz, 0dBm, on the line input. 3. Key the transmitter on. 4. 6 FIELD ALIGNMENT PROCEDURE Adjust RV1 (Set Max. Deviation) for a deviation of 5kHz (2.5kHz for narrow band transmitters). 5. Key the transmitter off. 6. Carry out the Line Input Level alignment procedure (section 6.7) 6.7 1. 2. Line Input Level Set the audio to 1kHz, 0dBm, on the line input, or use the actual signal to be transmitted.
7 SPECIFICATIONS 7 7.1 7.1 Overall Description SPECIFICATIONS Over all Descr iption The transmitter is a frequency synthesized, narrow band FM unit, normally used to drive a 50 watt amplifier. It can also be used alone in lower power applications. Various models allow 2-25W of output power to be set across a number of UHF frequency bands. All necessary control and 600Ω line interface circuitry is included. 7.1.
7.2 Physical Configuration 7.2 7 SPECIFICATIONS 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. The transmitter is 63.5 mm or two Eclipse modules wide. 7.3 Fr ont Panel Contr ols, Indicator s, and Test Points 7.3.1 Contr ols Transmitter Key - Momentary Contact Push Button Line Input Level - screwdriver adjust multi-turn pot 7.3.
7 SPECIFICATIONS 7.4.2 Fr equency Range and Channel Spacing Frequency 806-830 MHz 850-870 MHz 928-942 MHz 7.4.3 7.4.2 Frequency Range and Channel Spacing 25 kHz T800A T800B T800C 12.5 kHz T800AN T800BN T800CN Fr equency Synthesizer Step Size Step size is 10 / 12.5kHz or 5 / 6.25kHz, fixed, depending upon model 7.4.4 Fr equency Stability ±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 50Ω 7.4.
7.4.12 Distortion 7 SPECIFICATIONS Maximum Deviation - Maximum deviation preset to 2.5 or 5 kHz 7.4.12 Distor tion Modulation distortion is less than 3% at 1 kHz and 60% of rated system deviation. 7.4.13 Residual Modulation and Noise The residual modulation and noise in the range 300 - 3000 Hz is typically less than -50dB referenced to rated system deviation. 7.4.14 600Ω Line Input Sensitivity Adjustable from -30 to +10 dBm for rated deviation 7.4.
7 SPECIFICATIONS 7.4.21 7.4.21 DC Remote Keying 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 600Ω line or through a separate isolated pair. 7.4.22 Pr ogr ammable No-Tone Per iod A No-Tone period can be appended to the end of each transmission to aid in eliminating squelch tail noise which may be heard in mobiles with slow turn off decoders.
7.4.22 Programmable No-Tone Period Fr equency No Tone 67.0 69.4 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.
7 SPECIFICATIONS 7.5.2 7.5.2 Power & I/O Connector Power & I/O Connector 25-pin “D” Male Mounted on the rear panel 7.5.
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.
