Page 1: ...988 by HAL Communications Corp Urbana Illinois Printed in the United States of America All rights reserved Contents of this publication may not be reproduced in any form without written permission of...
Page 2: ...1 4 Tuning Indicator 16 3 2 Use of the ST 7000 18 3 2 1 General Considerations 18 3 2 2 HF Packet Operation 18 3 2 3 HF RTTY and AMTOR Operation 19 3 2 3 1 HF PTT Control 19 3 2 3 2 HF RX Data Squelc...
Page 3: ...GURE 4 I ST 7000 BLOCK DIAGRAM 2I FIGURE 4 2 AUDIO INPUT FILTERS 29 FIGURE 4 3 RECEIVE AGC CIRCUIT 30 FIGURE 4 4 600 HZ MARK FILTER 3I FIGURE 4 5 600 HZ SPACE FILTER 32 FIGURE 4 6 200 HZ DETECTOR 33 F...
Page 4: ...tions Corp immediately Be sure to fill out and mail the enclosed Warranty Card to HAL Communications 1 900 07000 ST 7000 HF Demodulator The following accessories are included with the ST 7000 1 770 05...
Page 5: ...uire changing of internal jumpers Therefore when making the first installation REMOVE the ST 7000 top cover before starting There are NO hazardous voltages inside the ST 7000 but use care to avoid dam...
Page 6: ...GND WJI II Jll PTI lijl J9 J8 RTS TIMER TP12 0 AUDIO DEFEAI TP6 0 R37 1200 2 0 TP13 TP7 0 R41 TPlO 0 R77 2210 Q __gBr llliEl J12 R51 R57 oo w RS2 o TP8 R54 CD J13 llQ J14 il TP9 SV AFSK ON OFF m SQUEL...
Page 7: ...ering on these connectors does NOT go in a logical progression Connections are as follows PIN USE 1 Transmit tones to HF transmitter audio input 2 GROUND 3 Push to Talk PTT to transmit receive control...
Page 8: ...ST 7000 l 6 I 7 I 8 ST 7000 IF RADlD PIN C INNECTl IIS CABLE PIN USE CllUlR 1 TX TONE OUT RED 3 PUSII TO TALl BLACK 4 UT II S NOT USED YELLOII P Q 3 Q RS 1 D TNC 1 L__________ R V MIT n fll H L COMMU...
Page 9: ...the rear panel Conversely if ypur transmitter system requires a higher level output internal jumper Jl2 may be installed to increase the maximum level output to 0 dBm 800 mY With J12 in place the HF A...
Page 10: ...o conductor shielded cable can be used to carry both transmit audio and PTT signals from the ST 7000 to the transmitter microphone input jack The ST 7000 HF PTT output includes a 20 second safety time...
Page 11: ...orrespond to those pins used on the popular TNC 2 MFJ 1274 and KPC controllers However connectors and standards change BE SURE TO CHECK YOUR MANUAL Connections to the TNC AUDIO connector are Pin Use I...
Page 12: ...be changed to use its external modem connection Other TNC s may or may not support direct TTL external modem connections Be sure to check your manual before making this connection The connector and pi...
Page 13: ...NC POVER SUPPLY l GROUND VIRE u GHD YEL IfVH IfRED IfBLK I I I t t t N IN N CUT PTT loUDIID AIJ I n ___ TERMINAL NODE TERI1INN CONTROLLER TNC c _ GROUND VIRE GilD YEL BLK RED PTT N IN 000 VHF TRANSCEI...
Page 14: ...2 4 c PO JER SUPPLY GND R f TERMINAL NODE CONTROLLER TNC PK232 EXT MODEM RADIO I RADIO 2 TERMINAL t Q o c J c J 5 i I 5 i I D I l j NOT JUSED UO 130VAC I 1 0 z 1 MT J REV DATE BY TERMINAL E 1 I 2 I 3...
Page 15: ...RS232 cable may be used between the ST 7000 and the RPC 2000 For other TNC devices be sure to consult your manual and connect only those pins that are required Two jumper fields are provided for RS232...
Page 16: ...HANNEL A I RPC 2000 DS 3200 REV DATE I 2 I 3 I I 5 1 6 I BY I 7 I 8 ST 7000 RPC 2000 RS232 I 0 PIN I USE _a_c RS232 _CD 19 PUSH TO TALK PTI NOTES 1 PIN 1 IS CONNECTED TO CABLE SHIELD 2 SELECT EIIJ lER...
Page 17: ...ter 2 GROUND 3 Push to Talk to VHF Radio 4 Audio output from VHF Radio receiver 5 Not used Shell GROUND may not be used on some TNC s To use the TNC with the VHF radio set the ST 7000 front panel swit...
Page 18: ...ower to the ST 7000 Power is turned ON when the button is pushed IN HF position as indicated by the RED POWER front panel lamp If the TNC AUDIO interface connection is used and a VHF radio is connecte...
Page 19: ...nter frequency of the ST 7000 A packet radio signal will appear as a band of dots the width of which is proportional to the shift and data rate The dots actually correspond to the frequency spectra of...
Page 20: ...00 200 r 200 r r fc fc t tr1 600 Hz SHIFT 600 Hz SHIFT e TONE FREQUENCY TOO LOV CORRECT TUNING 1 I 2 I 3 I 4 I 5 l 6 I Cl Cl Cl Cl Cl Cl 600 Cl Cl 600 Cl Cl Cl 200 Cl r Cl 200 Cl r fc 200 Hz SHIFT TON...
Page 21: ...transmit and receive If so use LSB for transmit and RTTY for receive Other radios such as the Ten Tee Paragon and the TS 430 have a full range passband tuning adjustment In this case use LSB mode and...
Page 22: ...d for 300 baud data and use at slower rates is a compromise condition when compared to a matched performance modem such as the HAL ST 8000 AMTOR may also be used with the ST 7000 with very good result...
Page 23: ...THRESHOLD control still also controls the CD lamp and the CD output signal 3 2 3 3 HF TRANSMIT TONE ON OFF Some HF RTTY systems require that the transmit tones be turned OFF when receiving and ON when...
Page 24: ...DID J J3 liiC JS 0 0 I I 0 2210 rCII I I I I ml 1 1 1 o I c t D CARRIER DETECT t HF AfSK LT t AI l liTI ni AI r J 0 1 TXD lf TXD I J wml I H I 0 D I I I D I SAFETY I TII R I I J6 L__ HF PTI __j 13VllC...
Page 25: ...itioned but passed through to the TNC or data terminal at the same data code and rate as that sent by the received station Similarly the data code and rate of a transmit signal is not changed by the S...
Page 26: ...E AUDIO AGC Figure 4 3 Al694 The output of switch Ul2a Sl drives active low pass filter stage Ul7b filter removes any clock noise produced by the SCF filters U7 or US output of this filter drives the...
Page 27: ...ter The filtered 600 Hz shift detected data is restored to bi polar saturated data by slicer stage Ul5c Transistor Q8 converts the bi polar data to TTL levels which then drive the shift data selector...
Page 28: ...mitter HFTXIN J3 pin I Two internal jumper options are provided for the HF AFSK circuit Jumper Jl3 allows ON OFF control of the HF transmit tones by the TNC or data terminal PTT signal With jumper Jl3...
Page 29: ...I 0 interface is selected by placing jumpers in all four positions of field Jll Sections of integrated circuit Ul provide buffering and polarity conversion for the RXD TXD and CD signals The PTT signa...
Page 30: ...nterface problems that have been noted with transistor keying of the widely differing PTT control line voltages and currents used on popular transmitters The safety timer prevents transmitter damage t...
Page 31: ...uned it is only necessary to adjust receiver tuning so that an equal vertical deflection on the two bars is obtained 4 12 THRESHOLD CIRCUIT Figure 4 13 Al692 The THRESHOLD or CD circuit also uses the...
Page 32: ...v C41 I lu I c c R30 II 0 R31 390 VC C c 390 R49 0 4 7K 8 z R47 I I 115 J b l J I I S 2 4 7K 3 d v c l 30pF I SHIFT 9 I D Tl IC34 1 I r l I 5 v t l D trJ VC C tl fJ l _j l tPr tt II1J HAL COMMUNICATI...
Page 33: ...K R127 B z t1i D S1 4 7K c s 14 S2 3 5 I U C71 I t 0012u t1i l TP17 t1i c 10 STCCD 0 I c K t1i 4 TP18 R125 0 10K D I I j_ t Dl2 1N4148 I D c l _j REV DATE BY EI1IJ HAL COMMUNICATIONS CORP A 6 6 88 RD...
Page 34: ...2700p l Rl 5 27K j_ Rl17 OK t I 69 F M OOp r r 2 4 5 7 RN3 OK I 3 6 8 3 I 4 I 5 I 6 TP15 14 R97 20K Rll3 30 9K IX I v REV DATE A 7 15 88 ll B 16 88 5 I 6 I 7 I 8 R98 20K 1N 14B 2 4741 n S3 5 DB 1N414...
Page 35: ...08 t R89 R93 20K 0 lOOK lOOK 0 S4 5 0 DIO I c R90 R94 IN4 48 I c 18K 18K N Cll R9 tn d OK OK C6c FS FS c700p I tr1 TJ v t D I D 1 tr1 0 3 61 I REV DATE BY III HAL CDMMUNICATIONS CORP A 7 15 88 RD BOX...
Page 36: ...D 10 Jl4 L J 0 R8l RIDS STD RTTY trJ 18K R96 R95 14 OK 9 R104 RXD SQUELCH 1 SIK 82K I a OK wn l R99 2210Hz w IM 0 D 4 S4 w I j_ 1 11 14 I D R 06 1 O u SIK C64 RIOO I Olu 68K v REV DATE BY Jill HAL COM...
Page 37: ...M lOOK 51K 62K R63 R64 3 9K T1 R71 R65 R69 I c I n 1 I q n 1 1 1 I 2M 240K j_ nl 62K 51K lOOK c T1 J12 JUMPER F OR 0 dBM C26 0 0012u C29 C28 tT I 47p Rll 47u z 5 6K HF TXIN 9 tT I R O I D 27K R12 D K...
Page 38: ...lu 0 z tTl T1 J11 74HCT240 TP2 TP1 TTL 8 U1 12 0 Q D ro 11 Ule 9 TNC TTL I 0 10 CD Jl 13 Ulf 7 I 1 RXD e T1CD 3 Cll tTl GND R29 C3 J I PTT 330 001u Vee 1 18 I 1 C4 C2 E 001ui OOlu 001u 1 I 2 I 3 I 4 I...
Page 39: ...v R80 5 1K 8 I I I t TTXD 9 TPll 14 ill 113 114 112 is RECOVERED C49 Olul R75 30K R76 18K R77 5K 1700 R43 TIN 9l R42 620 1200 2200 RXD TIJ TNC R79 TNC TXD 510K C53 I2700p TCD 9 HF CD IREV I DATE I BY...
Page 40: ...I b1 2 C13 OOlu VC C Kl 3 R131 330 Vee __ l I I Q R15 lK D3 1N4148 4 Cl6 OO u 5 13V I C18 OOlu REV A B o SIJ2 6 7 8 SIJl v o I I R130 SHIFT 1 5 6 lOK TP5 FG E 0 5A n YN D4 C23 i 13VDC 1N4005 OOlu I f...
Page 41: ...c I I 0 I c 0 0 C 1 i 9 0 3V 9 s 1 is 12V 21 tT1 FROM S 2 I I v 8V Cll 1_ C84 j_ CBS c I lOu I Olu I O u U I C D I D C t I I Bl VR5 f tT1 I 7662 Cll j_C79 i Ou REV DATE BY IJIJHAL COMMUNICATIONS CORP...
Page 42: ...6K z c I c v z 0 z 2 tj STOCD f C7 lu D v _L 1 1 1 _L I D 0 R7 330K 1 2K p I R18 Rl7 01 REV DATE BY El1Il HAL COMMUNICATIONS CORP RIO lOOK 51K TF M BOX 365 URBANA IL 61801 lOOK R20 A 8 17 88 OK ST700...
Page 43: ...1 D 0 tr1 tr1 RS 0 6 _ lK THRESHOLD E 1 2 3 4 5 6 vee R15 470 CD vee R4 390 Ql R3 lOK MPS3395 Dl 1N4148 REV DATE l Y A 8 17 88 TF M 6 I tl Q2 CD MPS3395 R24 OK CD El1 l HAL COMMUNICATIONS CORP BOX 365...
Page 44: ...C3 J I C38 C39 C42 C44 c s s t U8 liJ 11 ttO I C468 Kl c s U6 C5l J41 8 1 8 cs7 UIO 0 5 8 C 52 1 I 8 C40 C41 R52 t l il 8 IIV DO DI c49 2000 C47 I DI ot Tl t i J m 0 JJR L R54 d53 UU 11 10 R74 J13 RS3...
Page 45: ...ST 7000 OPERATOR S MANUAL HAL880815 c J R25 o DDDDDDDDDD DDDDDDDDDD FIGURE 4 15 ST 7000 DISPLAY CIRCUIT BOARD PAGE 42...
Page 46: ...t boards A careful reading of Chapter 4 THEORY OF OPERATION is highly recommended before attempting the following steps NOTE The ST 7000 uses CMOS and other Electrostatic Discharge ESD sensitive devic...
Page 47: ...r led is turned ON Measure and record voltages 5 8 and 8v 0 5v 5V ______ 8V 8V _____ 2 Connect scope and counter to U2 ll and confirm that 119 531 Hz square wave is present Measure and record frequenc...
Page 48: ...onnect scope amd ACVM to TP15 Ul6 14 Adjust RllO and Rll7 for maximum output at TP15 The level should be 0 5 dBm 1 dB Record V TP15 V 1910Hz TP15 dBm 9 Measure BW and Fe Typical values are 1910 Hz Fe...
Page 49: ...all jumper plug at J11 1 TTL RXD and 114 5v position Use scope to confirm a TTL level 300 bd data signal at TP1 TTL 1 0 Remove jumper plug when done 19 Install jumper plug at J9 1 RS232 RXD Use scope...
Page 50: ...ct scope and ACVM to TP5 J5 4 Confirm that 1200 2200 Hz AFSK signal is present at approximately 10 dBm level 5 dB Record this level V TP5 dBm 31 Connect J5 l to 15 4 TNC AUDIO AF IN to AF OUT Connect...
Page 51: ...at J3 l Remove jumper wire between J9 3 and Jl 2 and jumper at Jll 3 when done 43 Install jumper at Jll 4 Connect continuity tester to J3 3 HF RADIO PTT Connect Jl 5 TTL 1 0 PTT to ground and confirm...
Page 52: ...e 600 ohms unbalanced PTT Control Relay closure to ground 50V 25A maximum TNC 1 0 INTERFACE PAGE 49 RPC 2000 TNC TTL RS 232 DB25 Connector with RXD TXD CD RTS PTT 5 pin TTL with RXD TXD CD and PTT TNC...
Page 53: ...thorization Number at this time 4 Return the unit freight prepaid Include in the shipping carton a reference to the Return Authorization Number and a brief description of the problem Correct installat...
