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Summary of Contents for AEA COMPUTER PATCH CP-1
- Page 1 Instruction Manual AEA COMPUTER PATCH MODEL CP-1...
- Page 2 Instruction Manual AEA COMPUTER PATCH MODEL CP-1...
- Page 3 INFORMATION TO USER* This equipment generates and uses radio frequency energy and if not used and installed properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits of a Class B com puting device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide a reasonable protection against such interference...
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Page 4: Table Of Contents
TABLE OF CONTENTS D E S C R IP TIO N ................... 1 C O NTRO LS....................2 CO NNECTIO NS..................3 O P E R A T IO N ....................5 RF SH IELD IN G ................... 7 BASIC RTTY THEO RY................8 S C H E M A TIC ................ -
Page 5: Description
AEA COMPUTER PATCH™ INTERFACE MODEL CP-1 Congratulations on your decision to purchase the AEA Com puter Patch™ interface. This equipment was designed to broaden the scope and use of the radio amateur’s home computer. DESCRIPTION The AEA Com puter Patch... -
Page 6: Controls
CONTROLS FRONT PANEL Power. O n/off switch. With the switch depressed, the CP-1 w ill be on and the LED power indicator w ill light. Filter. VAR/170/CW — Selects CW or RTTY operation. Use the VAR (variable) shift rotary control when in the VAR position for RTTY shifts at other than 170 Hz. -
Page 7: Connections
Appendix A shows a loop keying circu it that w ill perform the task of driving a current loop. If you wish, you could also purchase the AEA model RS-232-1 option that w ill perform as an isolated current loop... - Page 8 (Also see RF Shielding, page 7) To computer, 5 pin connector (supplied), TTL levels Pin 1 - PTT; active low send Pin 2 - RTTY input; space low, mark high Pin 3 - CW input; active low Pin 4 - Ground Pin 5 - Demodulator output;...
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Page 9: Operation
OPERATION There are three filte r selections available from the front panel. Two are for RTTY teletype use, one is fo r CW use. The position marked 170 is for use with amateur and commercial 170 Hz shift teletype (either Baudot or ASCII) with the mark tone at 2125 Hz and the space tone at 2295 Hz. - Page 10 To tune amateur HF teletype signals, set yo ur receiver to lower sideband, set the audio to a com fortable level and slowly tune your receiver for a teletype signal. Tune fo r peak bar graph closure and m inimum flicker. If the LED bar graph flickers on mark-space transitions, retune until the flickering stops.
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Page 11: Rf Shielding
If you own a transceiver with a RTTY mode position, then you may desire to m odify your CP-1 as per Appendix D to use FSK. If you wish to use AFSK, then you must use lower sideband and use the mic input of the transceiver. -
Page 12: Basic Rtty Theory
BASIC RTTY THEORY Radioteletype (abbreviated RTTY) is a form of telegraphic com m un ication em ploying typew riter-like machines for generating a coded set of electrical impulses when a key is pressed on the keyboard and converting a received set of such impulses into the corresponding character. - Page 13 operation. The stop bit indicates the end of the operation (character) and sets the machines up for the next character. Since both RTTY Baudot and RTTY ASCII are teletype sent over a radio, technically both are RTTY. However, RTTY Baudot is usually referred to as RTTY and RTTY ASCII is referred to as ASCII.
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Page 14: Schematic
%LK K c l £ A i s SCHEMATIC... -
Page 15: Trouble Shooting Guide
TROUBLE SHOOTING GUIDE PROBLEM CAUSE SOLUTION No Power 1. Unit not turned on 1. Turn unit on 2. Unit not plugged in 2. Plug unit in 3. No power from wall adaptor 3. Check supply for 16 VAC Bar graph 1. -
Page 16: Alignment Procedure
ALIGNMENT PROCEDURE Each CP-1 has been carefully aligned after an elevated temperature oven burn-in and has passed many tests before it leaves the factory. However, many amateurs like to keep their equipment aligned to specifications. The follow ing describes how to tune your CP-1: Test equipment needed: 1. -
Page 17: In Case Of Difficulties
IN CASE OF DIFFICULTIES If, after re-reading this manual, you are having difficulties, a telephone call to the factory Custom er Service Department w ill likely provide a quick answer to your problems. Before calling the factory, try to have the CP-1 in operation near the telephone so that our technician can talk you through the problems. -
Page 18: Block Diagram
BLOCK DIAGRAM CP-1... -
Page 19: Parts Pictorial
R S - 2 3 2 OPTION PARTS PICTORIAL... -
Page 20: Parts List
PARTS LIST REFERENCE VALUE Tantalum Cap. 3.3uf / 25v C3, 4, 5, 6 Tantalum Cap. 6.8/25 C1, 2 Electrolytic Cap. AX 4700/25 o r 1000/25 C38, 39 Electrolytic Cap. RAD 100/25 C22, 20, 26, 29, 28 Electrolytic Cap. RAD 10/25 C31, 32 Ceramic Cap. - Page 21 VALUE REFERENCE Resistor 1 /4W. 5% 150 R9, 82, 100* Resistor 1 /4w. 5% 1.6k R105, 13 Resistor 1 /4w. 5% 15k R107 Resistor %w. 5% 130 R86, 128 Resistor 1 /4W. 5% 12k Resistor Ww. 5% 11k R68, 66, 63, 64 Resistor 1 /4w.
- Page 22 (external from the CP-1). If you do not have a +12V source available, we would recommend the AEA model AC-1 power supply. MODIFICATION #2: (for CP-1 serial numbers 1100 and ABOVE) We also recommend that you build this circu itry on a small “ perf board”...
- Page 23 APPENDIX “B” MANUFACTURER’S RECOMMENDED MICROPHONE INPUT CONNECTIONS FOR INTERFACING TO THE CP-1 ICOM (730, 740, 720, 751, 745) CP-1 Pin ICOM Mic. Pin KENWOOD (TS 430s, 930s) (830s, 530s) CP-1 Pin YAESU (980, FT-ONE, 102, 77) (101ZD, 902DM) CP-1 Pin DRAKE (TR-7A) CP-1 Pin...
- Page 24 APPENDIX “C” CP-1 COMPUTER PATCH APPLICATIONS NOTE - NEGATIVE KEYED P.T.T. Customers who have radios with negative keying Push to Talk lines (such as the Drake T4XC), w ill have problems with their radios being in a keydown state at all times. There are two m odifications to correct this which can be internal to the CP-1.
- Page 25 APPENDIX “D” FSK APPLICATION Some customers who have transceivers w ith a RTTY FSK position built in have asked how they can use their CP-1 w ith FSK. Figure 1 shows a simple c ircu it consisting of a small signal type NPN transistor (2N2222) and three resistors.
- Page 26 APPENDIX “E” AFSK 850 HZ SHIFT Persons interested in using their CP-1 on MARS, where the standard shift is 850 Hz can m odify their CP-1 by inserting one resistor, one potentiometer, and one switch as follows: 1. Locate and lift Pin 8 of U14 (XR2206). 2.
- Page 27 LIMITED WARRANTY A D V A N C E D E L E C T R O N IC A P P L IC A T O N S , IN C . w arra n ts to th e o rig inal p u rc h a s e r th a t th is pro d u c t shall be fre e from d e fec ts in m aterial or w o rk m a n s h ip fo r nin ety days fro m th e d a te o f o rig in a l pu rchase.
- Page 28 Ad va nce d Electronic Appli catio ns, Inc. P.O. Box C-2160 L y n n w o o d , WA 98036 (206) 775-7373 T ele x: 152571 A E A IN T L...
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