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.
B T800 Parts List Main PCB Assembly Parts Ref. C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 Description Capacitor 10U 35V Rad Electro Capacitor 18P 2% 100V NPO Rad.1 Capacitor 100N 10% 50V X7R Rad.2 Capacitor 10N 10% 50V X7R Rad.
Ref. C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 C78 C79 C80 C81 C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C132 D1 Description Capacitor 100N 10% 50V X7R Rad.2 Capacitor 100N 10% 50V X7R Rad.2 Capacitor 10U 35V Rad Electro Capacitor 100N 10% 50V X7R Rad.2 Capacitor 1N0 5% 100V NPO Rad.2 Capacitor 100N 10% 50V X7R Rad.2 Capacitor 100N 10% 50V X7R Rad.
Ref.
Ref.
Ref. R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 Description Resistor 22R 5% O.25W Axial Resistor 4K7 5% 0.25W Axial Resistor 2K2 5% 0.25W Axial Resistor 100R 5% 0.25W SM1206 Resistor 100K 5% 0.25W Axial Resistor 6K8 5% 0.25W Axial Resistor 10K 5% 0.25W Axial Resistor 10K 5% 0.
Ref. R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R119 R120 R121 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 RN1 RN2 RV1 RV2 RV3 RV4 S1 T1 U1 U2 U3 U4 U5 U6 U7 U8 U9 U10 U11 U13 U14 XO1 Description Resistor 4K32 1% 0.25W Axial Resistor 4K32 1% 0.25W Axial Resistor 4K32 1% 0.25W Axial Resistor 470K 5% 0.25W Axial Resistor 1K0 5% 0.25W Axial Resistor 560R 5% 0.25W Axial Resistor 3K3 5% 0.
Ref. Y1 Y2 Description Crystal 8.0MHz Crystal 4.0MHz Par t Number 32/2049/08M0 32/2049/04M0 Power Amplifier Assembly Ref. C1 C2 C3 C4 C5 C6 C7 C8* C9 C10 C11* C12 C13 C14 C15 C16 C17 C18 C20 C21 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 D1 D2 D3 D4 J2 L1 L2 L3 L4 L5 L6 L7 L8 L9 P1 Q2 Q3 Q4 Q5 R1 R2 R3 R4 R5 R6 Description Par t Number Capacitor 1N0 5% 63V NPO SM1206 Capacitor 1N0 5% 63V NPO SM1206 Capacitor 18P 5% NPO SM1206 Capacitor 1N0 5% 100V NPO Rad.2 Capacitor 10N 10% 50V X7R Rad.
Ref. Description Part Number R7 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R33(Q1) RT1 RV1 U1 U2 Resistor 47K 5% 0.25W Axial Resistor 10R 5% 0.25W Axial Resistor 1K0 5% 0.25W Axial Resistor 10R 5% 0.25W Axial Resistor 470R 5% 0.25W Axial Resistor 10K 5% 0.25W Axial Resistor 470R 5% 0.25W Axial Resistor 470R 5% 0.25W SM1206 Resistor 7K5 1% 0.25W Axial Resistor 1K0 5% 0.25W Axial Resistor 100K 5% 0.25W Axial Resistor 100R 5% 0.25W Axial Resistor 100K 5% 0.
A B C SMB J1 2 1 C18a 10uF P1 100nF 2p2F C3a + C13 220pF C30 C18b 1 220pF 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 C3b 3p9F R17 6K8 +13.8 2 +9.4 12nH L1b 6.8nH L1a L4 330nH 100nF C2 BCP53T1 2 Q3 + C50 +9.
2 3 - 11 TLC274 U9A 0 DBM 1 2 3 RV4 10K POT C65 1N0 1 2 3 R61 1K2 AGND R33 10K D10 1N4148 ALARM LED D1 RED LED +9.2TX R86 680 R85 LD 2K2 - PWR XALC R1 DB25 R84 100K TUNE V. 5K11 R83 5K11 R36 TUNE V. REV.PWR. FWD.PWR. RX DATA A15 A14 A13 A12 A11 A10 A9 A8 C86 10N C4 10N P1 DB9 FWD.PWR. 5K11 TX DATA LINE INP. C85 10N R82 5K11 R81 5K11 REV.PWR.
1 I 2 3 4 5 6 7 8 9 10 C140 1N0 +5.0 U9C Vab1 10K0 +9.4 100N C64 JP4 1 2 3 JP19 1 2 3 TERMINATED 2 1 1 2 2 1 B R60 1K2 1N4148 1 2 ISO1 4N32 (or 4N33) MMBF5459 Q17 2 1 TUNE V. 5K11 C4 10N A15 A14 A13 A12 A11 A10 A9 A8 C86 10N R83 5K11 R36 FWD.PWR. 5K11 C85 10N R82 5K11 R81 5K11 REV.PWR.