Status Tone Generator

Transcription

1 Eclipse Series RF Technology January 004 Status Tone Generator Operation and Installation This manual is produced by RF technology Pty Ltd 0/8 Leighton Place, Hornsby 077, Australia Copyright 00 RF Technology Pty Ltd

2 CONTENTS CONTENTS Contents. Scope. Circuit Derscription. Installation Mounting the STG into the Receiver Connect the Wires 4. Alignment 4 5. Preventive Maintainance 4 6. Appendix Status Tone Generator Block Diagram Schematic Diagram PCB Layout 7 Wiring Between 969 PCB and Receiver PCB 8 7. Parts List 9 RF Technology Status Tone Generator STG- Page of 0

3 . SCOPE STATUS TONE GENERATOR INSTRUCTION MANUAL. SCOPE This document provides the information necessary to install, operate and maintain the RF Technology s 969 Status Tone Generator (STG). The STG is designed for receiver voting applications to provide a fixed audio tone output when the receiver is squelched and passes the normal audio when the receiver squelch is open. The standard audio tone is 950 Hz but 75 Hz and 700 Hz tones are also available if the optional crystals are fitted.. CIRCUIT DESCRIPTION The 969 status tone generator is specially designed for RF Technology s Eclipse series receivers. It is an option board which mounts directly on to the receiver pcb or it can be used as an independent module for those applications which use third party receivers. The 969 STG is mounted on the RX pcb via the socket SOK, SOK and a mounting screw. Jumpers JP, JP provide the same function as on the RX pcb. Audio signal is buffered by UD and amplified by UA. The output level can be adjusted by VR. The ohm resister R is normally not fitted, it is used only for the applications which need mixed audio and tone signal. A Logical low from SQL (receiver is muted) enables the oscillator and the frequency divider. UC and Y (or Y or Y) form the crystal oscillator, the oscillation frequency could be.944mhz, or MHz, 5.596MHz depending on the crystal. U provides 048 times division to form the 950Hz, 75Hz or 700Hz square wave signal. The square wave is then adjusted by RV, and filtered by UB and UC to form a sine wave signal. The sine wave is brought out as the status tone at DC block capacitor C, or may be mixed with the audio signal by fitting the ohm resistor R.. INSTALLATION Mounting the STG into the receiver Turn the power off by disconnecting the DB5 connector and open the receiver lid. Locate and remove the top-right mounting screw (near the internal speaker) of the receiver pcb, and replace it with the mm spacer screw instead. Please note the positions of JP and JP and remove the plastic jumpers. Fit the STG on to the receiver pcb making sure that JP and JP of receiver pcb are completely inserted into the SOK and SOK of 969 STG Replace the plastic jumpers on JP and JP in their original positions. Secure the mounting screw through the top-right corner mounting hole into the spacer The 969 PCB should be firmly mounted. RF Technology Status Tone Generator STG- Page of 0

4 4. ALIGNMENT Connect the wires Refer to the Wiring Diagram in the Appendix. With the 4 way cable supplied, connect the STG pin to the via hole on the front side of R77, pin to 5V supply, pin to the SQL via hole, and pin4 to Ground. 4. ALIGNMENT Check that all the wires are correctly connected. Set VR and VR to approximately half way position. Turn the receiver on without any RF input signal and monitor the line output. A 950Hz status tone should be observed. Align the tone level pot RV on the 969 PCB until the status tone level is 0.775VRMS or the level required. Set the RF signal generator to -60dbm RF level and KHz audio modulation, with appropriate RF frequency and deviation. When the receiver squelch LED is ON, the 000Hz audio will replace the status tone signal. Align the pot RV on the 969 PCB until the audio level is 0.775VRMS or the level required. The 969 STG may have optional crystals for 50 Hz and 700 Hz fitted. The appropriate jumper or solder link next to the crystal needs to be in place to select these frequencies. Only one of the three frequencies should be selected at any time. It may be necessary to readjust the tone level if an option frequency is selected. 5. PREVENTIVE MAINTENANCE There is no preventive and periodic maintenance requirement for this Status Tone Generator board. RF Technology Status Tone Generator STG- Page 4 of 0

5 6. APPENDIX Block Diagram 969 Status Tone Generator Block Diagram RF Technology Status Tone Generator STG- Page 5 of 0

6 Circuit Diagram 969 Schematic Diagram RF Technology Status Tone Generator STG- Page 6 of 0

7 D C B A AFIN Tone Out R4 R5 ST_O VDD C 0u R K Vref C R4 R ** 8 Not Fitted UC LM4 R 0 9 UD LM4 4 C4 0p R7 VR C5 R5 C 0u Vref R9 C6 n R R8 7 R6 UB LM4 UA LM4 5 6 R8 C7 0p R0 C9 0u C8 AFMX R C9 n R Vref R C0 VR C7 UE LM4 R9 R0 U 400 HPF AFMX NCH DEEM AFOUT FLAT +5V COS HPF AFMX NCH DEEM AFOUT FLAT COS VDD SOK SOK C 0u R6 JP JP HPF AFIN NCH DEEM AFOUT FLAT R7 Vref C 0u C4 47p Y.996M Y *4.4544M Y *5.596M * Not Fit, For PCB Layout Only Xtal Frequency = Tone Frequency X 048 Use Y For 950Hz Tone Use Y For 75Hz Tone Use Y For 700Hz Tone 45 Correct the polarity of C9 Rev No. ECO No. Description of Change Title Pilot Tone Generator Size: A4 Number: 05/969/R7 Revision: Print Date: -Aug-005 0:58:8 Sheet of Rev. Release Date: 0/08/005 Originator: File: C5 47p COS R K 4 5 UB 74HC00 R M UC 74HC00 D:\Protel Files\Master_EDA\969_Tone_Generator\969.ddb - Documents\969_.Sch 8 0 CLK RST Q 9 Q4 7 Q5 5 Q6 4 Q7 6 Q8 Q9 Q0 4 Q 5 Q Q Q4 C RF Technology Pty Ltd Unit 0, 8 Leighton Place Hornsby, NSW 077 Australia D C B A V- V+ 4 UA 74HC00 UD 74HC00 GH L C8 VDD

8 PCB Layout Top Side of 969 PCB Bottom side of 969 PCB (view from Top) RF Technology Status Tone Generator STG- Page 7 of 0

9 Wiring Diagram Wiring between 969 PCB and Receiver PCB RF Technology Status Tone Generator STG- Page 8 of 0

10 Wiring between 969 PCB and Receiver V PCB RF Technology Status Tone Generator STG- Page 9 of 0

11 Part List REF DESCRIPTION PART NUMBER C CAP ELECCTRO 0U 6V M60 4/00/00U C0 CAPACITOR 06 0NF 0% X7R 46/0/00N C CAP ELECCTRO 0U 6V M60 4/00/00U C CAP ELECCTRO 0U 6V M60 4/00/00U C CAPACITOR 06 0NF 0% X7R 46/0/00N C4 CAPACITOR 06 47PF 5% NPO 46/00/047P C5 CAPACITOR 06 47PF 5% NPO 46/00/047P C6 CAP ELECCTRO 0U 6V M60 4/00/00U C7 CAPACITOR 06 0NF 0% X7R 46/0/00N C8 CAPACITOR 06 0NF 0% X7R 46/0/00N C9 CAP ELECCTRO 0U 6V M60 4/00/00U C CAP ELECCTRO 0U 6V M60 4/00/00U C CAPACITOR 06 0NF 0% X7R 46/0/00N C4 CAPACITOR 06 0PF 5% NPO 46/00/0P C5 CAPACITOR 06 0NF 0% X7R 46/0/00N C6 CAPACITOR 06.NF 0% X7R 46/0/0N C7 CAPACITOR 06 0PF 5% NPO 46/00/0P C8 CAPACITOR 06 0NF 0% X7R 46/0/00N C9 CAPACITOR 06.NF 0% X7R 46/0/0N JP WAY VERTICAL HEADER 5/50/000 JP WAY VERTICAL HEADER 5/50/000 R RESISTOR /-5% /8W *NOT FITTED R0 RESISTOR /-5% /8W 5/85/0 R RESISTOR /-5% /8W 5/85/0 R RESISTOR /-5% /8W 5/85/0 R RESISTOR /-5% /8W 5/85/0 R4 RESISTOR /-5% /8W 5/85/0 R5 RESISTOR /-5% /8W 5/85/0 R6 RESISTOR /-5% /8W 5/85/0 R7 RESISTOR /-5% /8W 5/85/0 R8 RESISTOR /-5% /8W 5/85/0 R9 RESISTOR /-5% /8W 5/85/0 R RESISTOR /-5% /8W 5/85/0 R0 RESISTOR /-5% /8W 5/85/0 R RESISTOR M+/ -5% /8W 5/85/0M0 R RESISTOR 0805.K+/-5% /8W 5/85/0K R RESISTOR /-5% /8W 5/85/0 R4 RESISTOR /-5% /8W 5/85/0 R5 RESISTOR /-5% /8W 5/85/0 R6 RESISTOR /-5% /8W 5/85/0 R7 RESISTOR /-5% /8W 5/85/0 R8 RESISTOR /-5% /8W 5/85/0 R9 RESISTOR /-5% /8W 5/85/0 SOK WAY FEMAL HEADER 5/50/000 SOK WAY FEMAL HEADER 5/50/000 U IC LOW POWER QUAD OPAMP 6/000/M4 U IC 4 STAGE BINARY COUNTER 9/000/400 U IC QUAD NAND 9/000/HC00 VR TRIMPOT TURN VERT 5/00/0 VR TRIMPOT TURN VERT 5/00/0 Y XTAL HC49 F=.996MHz /XTL/996 Y XTAL HC49 F=4.4544MHz *NOT FITTED Y XTAL HC49 F=5.596MHz *NOT FITTED RF Technology Status Tone Generator STG- Page 0 of 0