Daniels VT-3/140-SWA2 Instruction Manual Download Page 188

Page: 188 / 262

PCB 50038-02

DATE: FEB 27, 1997

DWG No:OS3HANA040AS1A

DANIELS

ELECTRONICS

VICTORIA, B.C.

TITLE: OS-3H040 ANALOG BOARD SURFACE MOUNT TOP LAYOUT

BOARD No.:

DWG REV DATE: 26 MAY 2000

50038-02

TITLE: OS-3H040 ANALOG BOARD GENERIC SM TOP DESIGNATIONS

C1
1nF

R14
10k0

R13
11k8

C6
47µF

C2
1nF

10nF

C12

LT1129-IS8

4.7µF

BC817

10k0

1nF

10k0

R34

10k0

R35

10k0

C19

10nF

R23
10R0

LP2951

U10

SEL

C21
10nF

C22

10nF

C20

4.7µF

C29
47µF

C30

10nF

R29

SEL

SI9945DY

R15

10R0

R24

10R0

4.7µF

C13

4.7µF

C15

4.7µF

C27

4.7µF

R12

10k0

1µF

C22

10nF

C26
1nF

R10

10k0

R18

C11

BC807

100nF

BC817

10k0

R11

47µF

C18

100nF

C10

10k0

R19

BAS16

JU1

1nF

C16

5k11

R17

5k11

R16

100nF

100R

5k0

RV1

C26

1nF

C31

1k00

10k0

C14

10nF

BC817

10k0

10nF

1nF

C25

49R9

20k0

R21

10k0

R53

10R0

R25

10nF

1nF

C17

0R0

R39

MMBV609L

10R0

R20

15K0

R27

C28

1nF

MMBD701L

SEL

C23

SEL

C34

C35

3.3pF

C36

330pF

R31

49R9

R30

10R0

C44

330pF

C47

330pF

R41

18R2

R47

47R5

R48

27R4

R49

33R2

C44

C55

10nF

R52

49R9

C56

330pF

R28

N/I

U11

MSA-0611

U16

MSA-0611

U15

SEL

L13

SEL

L11

C57

SEL

274R

R55

274R

R56

18R2

R54

SEL

C58

SEL

C52
330pF

C53

C46

330pF

C51

10nF

27R4

R45

10nF

C43

47R5

R44

47R5

R46

33R2

BYD17J

47pF

C62

JU2

JU3

JU4

22pF

C63

12pF

C64

SEL

C61

33pF

C40

49R9

R38

C41
1nF

SEL

C59

10nF

R22

DESIG.

TX 29 - 40 MHz

OST - 3H035

C23

150 pF

15 pF

C53

56 pF

C57

150 pF

C34

C61

TX 39 - 50 MHz

OST - 3H045

RX 50.4 - 71.4 MHz

OSR - 3H061

TRANSMITTER

RECEIVER

33 pF

C59

33 pF

C58

56 pF

100 pF

15 pF

47 pF

100 pF

33 pF

56 pF

68 pF

33 pF

56 pF

100 pF

68 pF

Not Installed

100 nH

L11

L13

100 nH

120 nH

DWG No:OS3HANA040AS2A

1k00

R29

U10

18k2

MC145191 or
MC145192

3k92

MC145193

3k92

MC145193

TCXO1

TITLE: OS-3H040 ANALOG BOARD TH TOP LAYOUT

U2
OPL550

U3
OPL550

U4
OPL550

U1
OPL550

U5
OP140A

TITLE: OS-3H040 ANALOG BOARD TH TOP DESIGNATION

DANIELS

ELECTRONICS

BAR located on
bottom side of TCXO

4-2

4.1.2 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Top)

TP2

TP3

TP1

TP4

Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29-470 MHz

OS3050M2B

Desolder three board
interconnect points to
separate analog and
digital boards..

Remove seven M2.0
machine screws to
remove analog board.

JU1 position B selected
for internal 9.6 MHz

LOCK DETECT

LED

Summary of Contents for VT-3/140-SWA2

Page 1: ...produced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd DE is a registered trademark of Daniels Electronics Ltd registered in the United States Patent and Trademark Office Issue 3 Previous Issue 2 Issue Date May 1998 Previous Issue Date April 1997 Daniels ...

Page 2: ...e this equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development This equipment may incorporate minor changes in detail from the information contained in this manual ...

Page 3: ... 3 1 Complete Transmitter Alignment 2 4 2 3 2 Frequency Change 2 5 2 3 3 Output Power Adjustment 2 5 2 3 4 Deviation Setting 2 6 2 3 5 Setting RF Alarm Thresholds 2 6 2 4 Recommended Test Equipment List 2 6 2 5 Repair Note 2 7 2 6 Printed Circuitboard Numbering Convention 2 7 3 ILLUSTRATIONS 3 1 3 1 MT 3 Transmitter Front Panel 3 1 3 2 MT 3 Transmitter Case Exploded View 3 2 4 PARTS LIST 4 1 5 REV...

Page 4: ...ding the general public for transmitter equipment operating below 10 GHz as defined in the references above is 2 W m2 0 2 mW cm2 B This transmitting equipment is designed for use with an outdoor antenna with a characteristic antenna gain of 10 dBi typically mounted at a significant height above ground to provide for adequate signal coverage To ensure that the general public is not exposed to a pow...

Page 5: ...of this manual reflects the modular makeup of the VT 3 product line Each module is fully described within its respective submanual all of which are contained within this document In general each submanual contains 1 A functional description and specification summary 2 a detailed technical description Theory of Operation and 3 assembly setup and alignment procedures relevent to that particular modu...

Page 6: ...mitter family each with different bands of operation channel spacing and or power outputs The 8 models are as follows VT 3 140 SNA2 synthesized 132 150 MHz band 5 0 6 25 kHz channels 0 5 2 0 W VT 3 140 SWA2 synthesized 132 150 MHz band 5 0 6 25 kHz channels 0 5 2 0 W VT 3 140 SNA8 synthesized 132 150 MHz band 5 0 6 25 kHz channels 2 0 8 0 W VT 3 140 SWA8 synthesized 132 150 MHz band 5 0 6 25 kHz c...

Page 7: ...K0F3E Frequency Modulation System Impedance 50 Ω Type N connector Duty Cycle 100 Continuous operation from 40 C to 60 C Spurious Emissions More than 80 dB below carrier Harmonic Emissions More than 90 dB below carrier Transmitter Mismatch Protection 20 1 VSWR at all phase angles Transmitter Alarm Forward power sense and reverse VSWR open collector output separate or OR ed configuration linear outp...

Page 8: ...sponse Pre emphasis 6 dB per octave 1 0 to 2 0 dB from 300 Hz to 3 kHz Flat Audio Response 1 to 1 dB from 100 Hz to 3 kHz Audio Deviation Preset to 3 0 kHz with a 1 kHz tone Subtone Audio Input 1 0 5 Vpp at 200 Hz for 500 Hz deviation internally adjustable Subtone Audio Input 1 Frequency range 60 Hz to 300 Hz Subtone Audio Input 2 0 5 Vpp at 100 Hz for 500 Hz deviation internally adjustable Subton...

Page 9: ... mate with Daniels standard M3 repeater subrack Subracks modules comply with IEEE 1101 DIN 41494 and IEC 297 3 mechanical size modular arrangement External Connections RF Connection type N connector located on the transmitter module front panel Motherboard Connections Audio Power and Control are made through a 48 pin gold plated type F connector on the rear of the transmitter module User connectio...

Page 10: ...3 8 Vdc supply the latter of which is connected only to the Amplifier Module The nominally 13 8 Vdc supply s range is 11 Vdc to 16 Vdc For the 0 5 to 2 0 Watt transmitters there is no current drawn on the 13 8 Vdc supply For the 2 0 to 8 0 Watt transmitters the current drawn from the 13 8 Vdc supply while transmitting at the rated power is approximately 1000 mA with temperature operating frequency...

Page 11: ...pically 10 ms The front panel depicted in Section 3 1 bears a DPDT toggle switch mounted on the Front Panel Board see the Transmitter Main Board Manual which controls the operation of the VT 3 132 174 MHz Transmitter When in the OFF position the transmitter is turned off however the 13 8 Vdc remains on the Transmitter Main Board terminals and on the Amplifier Module When in the KEYED position 9 5 ...

Page 12: ...FSW4 least significant Refer to the VT 3 150 Channel Designation Table Manual for the simplified channel number and frequency information For all VT 3 140 models 132 150 MHz with 5 kHz channel increments BCD settings from 0000 to 4999 CHNL Txfrequency 128 MHz 5 kHz or Txfrequency CHNL 5 kHz 128 MHz 6 25 kHz channel increments BCD settings from 5000 to 9999 CHNL Txfrequency 128 MHz 6 25 kHz 5000 or...

Page 13: ...rial The enclosure is completed by the installation of front and rear plates which are fastened to the Transmitter Main Board see Transmitter Main Board Manual for parts lists Transmitter alignment is performed on a module by module basis and detailed steps are provided in the respective manuals Alignment is simplified by using an SR 3 Sub rack SM 3 System Monitor and RF extender cable to provide ...

Page 14: ...ow Note It is advisable to confirm these frequency ranges with the individual module manuals notably the Amplifier and Synthesizer Module as they are subject to change with updated versions The values in the module manuals take precedent over those tabulated FOR MODEL ALL VT 3 132 174 MHz Transmitters Size of Frequency Change Modules to be Aligned less than 0 2 MHz Transmitter Main Board Channel C...

Page 15: ...deviation settings 2 3 5 Setting RF Alarm Thresholds The VSWR and Forward Power Alarms are factory preset to give alarm conditions for a 3 1 VSWR and 50 forward power respectively The Amplifier Manual describes how to adjust these settings should different levels be required If the alarm thresholds are crital to operation of a particular installation and if the transmitter undergos a large change ...

Page 16: ...rs it is recommended to use solder braid in place of manual vacuum type desoldering tools when removing jumpers This will help prevent damage to the circuit boards 2 6 Printed Circuitboard Numbering Convention To ease troubleshooting and maintenance procedures Daniels Electronics Limited has adopted a printed circuitboard PCB numbering convention in which the last two digits of the circuitboard nu...

Page 17: ... SWITCH TYPE N RF OUTPUT JACK SMA REFERENCE INPUT JACK TRANSMIT INDICATOR LED TRANSMITTER MODEL IDENTIFIER FACTORY SET OPERATING FREQUENCY MICROPHONE CONNECTOR TRANSMITTER TX REFERENCE INPUT OFF NORM KEY TX MIC RF OUT FREQUENCY MHz 33 25000 MADE IN CANADA VT 3 160 SWA8 MADE IN CANADA MADE IN CANADA RED TEXT FREQUENCY MHz 160 00000 ...

Page 18: ... Remove the four screws A in the Front panel 2 Remove the four screws B on the side of the Transmitter Case A A A A B B B B MT3TXM2B MT 3 Transmitter Case Exploded View 3 2 ELECTRONICS 3 2 DANIELS DE VHF Transmitter Instruction Manual ...

Page 19: ...VHF Enhanced Transmitter Instruction Manual VT 3 132 174 MHz 4 1 4 PARTS LIST Description Part No Qty LABEL LEXAN 14HP VHF RED 3536 10111405 1 ...

Page 20: ...4 2 VHF Enhanced Transmitter Instruction Manual VT 3 132 174 MHz This Page Intentionally Left Blank ...

Page 21: ...VHF Enhanced Transmitter Instruction Manual VT 3 132 174 MHz 5 1 5 REVISION HISTORY ISSUE DATE DESCRIPTION AND REASON 3 May 98 Manual formatted to modular style All previous revision history in issue 2 ...

Page 22: ...5 2 VHF Enhanced Transmitter Instruction Manual VT 3 132 174 MHz This Page Intentionally Left Blank ...

Page 23: ...retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd DE is a registered trademark of Daniels Electronics Ltd registered in the United States Patent and Trademark Office Issue 3 Previous Issue 2 Issue Date November 1998 Previous Issue Date May 1998 Daniels Electronics Ltd Pr...

Page 24: ...ipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development This equipment may incorporate minor changes in detail from the information contained in this manual ...

Page 25: ...annel Selection 2 5 2 1 4 1 Synthesized Transmitter 2 5 2 1 4 2 Crystal Controlled Transmitter 2 6 2 1 5 Amplifier Circuits 2 6 2 1 6 Time Out Timer Circuitry 2 6 2 2 MT 3 Front Panel Board 2 8 2 3 MT 3 Audio Processor Version 1 6 2 8 2 3 1 General 2 8 2 3 2 Power Requirements 2 8 2 3 3 Audio Processor Turn on Time 2 9 2 3 4 Audio Processor Signals 2 9 2 3 4 1 Audio Processor Outputs 2 9 2 3 4 2 A...

Page 26: ...3 2 3 5 1 MT 3 Transmitter Board Factory Configuration 3 2 3 5 2 MT 3 Audio Processor Factory Configuration 3 3 3 6 MT 3 Transmitter Board Alignment 3 4 3 6 1 General 3 4 3 6 2 MT 3 Transmitter Board Test Points 3 5 3 7 Module Installation and Removal 3 5 3 8 MT 3 Audio Processor Alignment 3 6 3 8 1 General 3 6 3 8 2 MT 3 Audio Processor Standard Deviation Adjustment 3 6 3 9 Standard Factory Setti...

Page 27: ...5 10 5 5 1 Audio Processor Component Layout 5 10 5 5 2 Audio Processor Schematic Diagram 5 11 5 5 3 TX Time Out Timer Electrical Assembly 5 12 5 5 3 1 TX Time Out Timer Component Layout 5 12 5 5 3 2 TX Time Out Timer Schematic Diagram 5 12 6 PARTS LISTS 6 1 6 1 Transmitter Main Board Parts List 6 1 6 1 1 Transmitter Main Board Electrical Parts List 6 1 6 1 2 Transmitter Main Board Mechanical Parts...

Page 28: ...vi Transmitter Main Board Instruction Manual This Page Intentionally Left Blank ...

Page 29: ...re they are then routed to the other MT 3 modules The front and rear panels are attached to the Transmitter Main Board and together with the extruded aluminum shell form the transmitter enclosure 1 2 Performance Specifications invisible text 1 2 1 General Type MT 3 Series Transmitter Compatibility MT 3 Series Amplifier OC 3 Crystal Controlled Oscillator module OS 3 and OS 3H Frequency Synthesizer ...

Page 30: ...kHz Audio Deviation Preset to 1 5 kHz Narrow Band or 3 0 kHz Wide Band with a 1 kHz tone capable 2 5 kHz or 5 0 kHz Subtone Audio Input 1 0 5 Vpp at 200 Hz for 500 Hz deviation internally adjustable Subtone Audio Input 1 Frequency range 60 Hz to 300 Hz Subtone Audio Input 2 0 5 Vpp at 100 Hz for 500 Hz deviation internally adjustable Subtone Audio Input 2 Frequency range DC to 150 Hz Direct Modula...

Page 31: ...s that key the transmitter are active low 2 Vdc One PTT input is on the front panel microphone connector The other two PTT inputs PTT WTO PTT With Time Out Timer and PTT NTO PTT No Time Out Timer are on the backplane connector of the transmitter board If required the microphone s PTT input can be configured to activate the transmitter s Time Out Timer TOT An isolated PTT input can be made availabl...

Page 32: ...the PTT NTO input When the PTT NTO signal which is normally high falls below 2 0 Vdc the transmitter is keyed As long as the PTT NTO signal remains below 2 0 Vdc the transmitter will remain keyed The transmitter is disabled when the PTT NTO signal rises above 2 3 Vdc The PTT NTO threshold of approximately 2 Vdc 0 3 Vdc hysteresis is set by U1b R5 R6 R7 R8 R9 and R10 while diodes D3 and D4 provide ...

Page 33: ...s When the transmitter is keyed Q1 is turned off and subsequently transistors Q3 Q4 and Q6 are turned on Transistors Q3 Q4 and Q6 provide three different functions Q3 provides the active low signal for the Synthesizer or Crystal Controlled Oscillator module PTT input Q4 turns on Q5 which turns on the 9 5 Vdc Switched supply Q6 turns on Q7 which turns on the 9 5 Vdc PTT Switched supply The 9 5 Vdc ...

Page 34: ...zer or crystal controlled oscillator is switched by a PTT signal standby current Synthesized not used in this mode Crystal Controlled typically 28 mA start up time Synthesized not used in this mode Crystal Controlled typically 10 ms MODE 4 Jumper J6 in jumper J7 in the x position jumper J18 in the x position the audio processor is enabled all of the time the synthesizer or crystal controlled oscil...

Page 35: ... J10 and J11 in the x position Audio amplifier U5 can be enabled by installing jumper J8 which connects power to U5 continuously in the x position PTT switched in the y position Setting jumper J10 in the y position and jumper J11 in the z position enables the audio path through the amplifier Level control for the squelched de emphasized audio input line is provided by R27 Audio amplifier U5 draws ...

Page 36: ...rward and reverse power sense lines from the Amplifier can be open collector or linear outputs depending on how they are configured in the amplifier module In open collector configuration the lines are active low that is the output will go low when a fail condition is detected If both lines from the amplifier module are configured as open collector outputs the power sense lines can be OR ed togeth...

Page 37: ...g of 5 minutes is shown in bold type in table 2 2 Table 2 1 Time Out Timer Settings D DISABLED no solder jumper installed E ENABLED solder jumper installed Bold text represents default settings TIME OUT DURATION MINUTES J26 E J26 D J26 E J32 J31 J29 J28 J27 D J27 E J27 E E E E E 0 01 0 01 0 01 E E E D 0 02 0 03 0 01 E E D E 0 04 0 06 0 02 E E D D 0 08 0 12 0 05 E D E E 0 15 0 23 0 10 E D E D 0 31 ...

Page 38: ...or voice or data transmission Two analog switches on the audio processor controlled by a common signal make it possible to transmit voice or data A continuous 9 5 Vdc supply and a switched 8 0 Vdc supply are required to power the module The MT 3 Audio Processor is backwards compatible to Daniels Electronics MT 2 series transmitters Refer to section 5 4 1 MT 3 Audio Processor Component Layout and t...

Page 39: ...power 9 5 Vdc is switched on The turn on time can be virtually eliminated by configuring the audio processor for continuous audio standby see section 2 1 2 7 Transmitter Standby Modes 2 3 4 Audio Processor Signals The MT 3 Audio Processor has six audio inputs two audio outputs and one audio control input Five of the audio inputs are used primarily for voice signals The sixth the Direct modulation ...

Page 40: ...ary input This should not be done without external filtering since jumper JU7 bypasses the limiting and filter circuits 2 3 4 3 Audio Processor Low Frequency Direct Mod Output The Low Frequency Direct Modulation Output port has two functions depending on whether the transmitter is synthesized or crystal controlled In a synthesized transmitter this port is used to modulate the synthesizer reference...

Page 41: ...lat audio response enable JU15 The compression level for this input is set by R48 The auxiliary output is normally summed with the voice signals by op amp U4a limited then filtered and output at the standard modulation output port When jumper JU6 is disabled and jumper JU7 is enabled the auxiliary input can be used to directly modulate the transmitter Care should be taken when directly modulating ...

Page 42: ...nuous 9 5 Vdc supply and a switched 8 0 Vdc supply are required to power the module The MT 3 Audio Processor is backwards compatible to Daniels Electronics MT 2 series transmitters Refer to section 5 5 1 MT 3 Audio Processor Component Layout and to section 5 5 2 MT 3 Audio Processor Schematic Diagram for component location and designation references 2 4 2 Power Requirements The audio processor can...

Page 43: ...wer 9 5 Vdc is switched on The turn on time can be virtually eliminated by configuring the audio processor for continuous audio standby see section 2 1 2 7 Transmitter Standby Modes 2 4 4 Audio Processor Signals The MT 3 Audio Processor has six audio inputs two audio outputs and one audio control input Five of the audio inputs are used primarily for voice signals The sixth the Direct modulation in...

Page 44: ...e transmitter to be modulated directly from the auxiliary input This should not be done without external filtering since jumper JU7 bypasses the limiting and filter circuits 2 4 4 3 Audio Processor Low Frequency Direct Mod Output The Low Frequency Direct Modulation Output port has two functions depending on whether the transmitter is synthesized or crystal controlled In a synthesized transmitter t...

Page 45: ...ed with the voice signals by op amp U4a limited then filtered and output at the standard modulation output port When jumper JU6 is disabled and jumper JU7 is enabled the auxiliary input can be used to directly modulate the transmitter Care should be taken when directly modulating the transmitter with the auxiliary input because the MT 3 transmitters use direct FM modulation and there is no filteri...

Page 46: ...w Frequency Modulation The transmitter has an additional option to address low frequency user modulation requirements A phase modulated bandwidth from 0 dc to 100 Hz PLL loop filter bandwidth allows specialized applications such as paging or trunking where a separate low frequency digital analog modulation channel is required Low Frequency Modulation allows external access to the low frequency mod...

Page 47: ...tion When removing Surface Mount Solder Jumpers it is recommended to use solder braid in place of manual vacuum type desoldering tools when removing jumpers This will help prevent damage to the circuitboards 3 3 Printed Circuitboard Numbering Convention To ease troubleshooting and maintenance procedures Daniels Electronics Limited has adopted a printed circuitboard PCB numbering convention in whic...

Page 48: ...nfiguration Jumper J3 no connection Optional relay configuration Jumper J4 y position Optional relay configuration Jumper J6 not installed Transmitter standby mode select Mode 1 Jumper J7 y position Audio processor standby mode select Jumper J9 not installed Receiver audio ac dc input coupling Jumper J12 not installed Amplifier power sense output configuration Jumper J13 x position Amplifier power...

Page 49: ...Bm gives 50 maximum deviation 1 kHz signal compression set at 60 maximum deviation Audio Balanced Input Enabled pre emphasis response 1 kHz tone at 8 dBm gives 60 maximum deviation 1 kHz signal compression set at 60 maximum deviation Subtone Input 1 100 Hz tone at 18 dBm gives 500 Hz deviation All other audio inputs Disabled Time Out Timer 5 minutes 30 seconds The corresponding Audio Processor jum...

Page 50: ...Subtone 2 AC coupled to direct modulation output enable Jumper JU32 not installed Audio output AC coupled MT 3 crystal transmitters Jumper JU33 not installed Audio output AC coupled MT 3 synthesized transmitters Jumper JU34 not installed Audio output from Direct Modulation circuits select Jumper JU35 not installed Direct Modulation output source select Jumper JU36 x position Subtone input 1 audio ...

Page 51: ...us 9 5 Vdc TP20 audio processor subtone 1 input TP21 audio processor supply 8 Vdc selected by J7 TP22 audio processor tone digital input TP23 synthesizer receive data line 0 Vdc TP24 synthesizer transmit data line 5 Vdc TP25 Q1 collector inactive 0 Vdc active 9 5 Vdc TP26 U2d output inactive 9 5 Vdc active 0 Vdc TP27 U1a output PTT WTO inactive 9 5 Vdc active 0 Vdc TP28 U1b output PTT NTO inactive...

Page 52: ...ing a plastic coated lifting tool such as a small screwdriver with the tip covered in heat shrink material gently lift the synthesizer module from the Transmitter Main Board by applying pressure in a rotating fashion about four corners of the synthesizer module Replace the two side screws 3 8 MT 3 Audio Processor Alignment Version 1 6 invisible text 3 8 1 General Verify the standard factory settin...

Page 53: ...hat the deviation increases until compression is observed The deviation should be 1 5 kHz or 3 kHz for narrowband and wideband channels respectively 12 A 1 kHz tone at 8 dBm input level should produce 60 maximum deviation If not go back to step 4 and make sure the pot is set for maximum gain and repeat the procedure If so increasing the input level by 20 dBm should not increase the deviation This ...

Page 54: ...nput 1 kHz signal at 10 dBm gives 50 maximum deviation 1 kHz signal compression set at 60 maximum deviation Audio Balanced Input Enabled pre emphasis response 1 kHz tone at 8 dBm gives 60 maximum deviation 1 kHz signal compression set at 60 maximum deviation Subtone Input 1 100 Hz tone at 18 dBm gives 500 Hz deviation All other audio inputs Disabled Time Out Timer 5 minutes 30 seconds The correspo...

Page 55: ...er JU25 installed Lowpass filter response select Jumper JU26 installed Lowpass filter response select Jumper JU27 not installed Direct modulation input audio path select Jumper JU28 not installed Amplified direct modulation bypass Jumper JU29 not installed Amplified direct modulation input DC coupled enable Jumper JU30 not installed Amplified direct modulation audio path select Jumper JU31 not ins...

Page 56: ...y Before adjusting the audio deviation confirm that the transmitter RF output frequency is correct 2 Connect the 600 ohm input to the incoming audio pins B18 Z18 Set the audio frequency to 1 kHz at the desired level of 8 dBm 3 Increase the balance level control R31 so that the deviation increases until compression is observed 4 Adjust the compression control pot R38 for compression at 60 maximum d...

Page 57: ...audio input Set the microphone compression control R2 to produce 50 maximum deviation Reduce the signal to 10 dBm and adjust the microphone input level control R2 for 50 maximum deviation Remove the signal 16 Apply a 100 Hz tone at 18 dBm to the subtone 1 input and adjust the subtone 1 level control R42 to produce 500 Hz deviation Remove the signal 3 11 Low Frequency Modulation Configuration Note ...

Page 58: ...MT 3 Transmitter board version 43 920914 or higher J6 installed 9 5V SWITCHED line always powered J7 installed in X position audio processor always powered up by 9 5VSWITCHED line J18 installed in the X position synthesizer always powered up by 9 5VSWITCHED line LTR is a Trademark of E F Johnson Company 3 11 2MT 3 Transmitter Audio Processors MT 3 Transmitter Audio Processor board version 43 91191...

Page 59: ... and P4 3 or install J23 together with a short piece of 22 or 24 gauge solid wire and solder see figure 3 1 This allows the DIRECT MODULATION input to the transmitter to be used to gain access to the SUBTONE INPUT 2 which connects to the PHASE MOD IN input of a modified synthesizer Note that the SUBTONE 2 input should not be used while this modification is in effect Note also that adjusting R44 ha...

Page 60: ...n connector and key the transmitter Adjust the level of the tone until a deviation of 1 5 kHz is acheived Note that the level required may be anwhere from 10 dBm to 0 dBm depending on the type of transmitter Confirm that the frequency response rolls off by checking that the following deviations are observed note that the deviation will NOT roll off at 300 Hz if an OC 3 crystal oscillator is used i...

Page 61: ... Negative D10 No Connect B10 PTT WTO Z10 PTT WTO D12 No Connect B12 Tx Standby Z12 Tx Standby D14 No Connect IMC1 B14 PTT NTO Z14 PTT NTO D16 No Connect IMC2 B16 No Connect MT 2 9 5V Z16 No Connect MT 2 9 5V D18 No Connect IMC3 B18 Balanced Input 2 Z18 Balanced Input 1 D20 Channel Select 0 LSB B20 Squelched De emph Audio Z20 Squelched Flat Audio D22 Channel Select 1 B22 Subtone Input 1 Z22 Tx Audi...

Page 62: ...4 2 Transmitter Main Board Instruction Manual This Page Intentionally Left Blank ...

Page 63: ...OPTIONAL 9 5 VDC CONTINUOUS J9 SQL DE EMP INPUT MIC OUT MIC IN BALANCED INPUT SIDE 2 600 OHMS BALANCED INPUT SIDE 1 SUBTONE INPUT 1 SUBTONE INPUT 2 SQL FLAT INPUT DIRECT MOD INPUT PTT WTO TX STANDBY NO2 COMMON 2 NC2 RLY POS RLY NEG NC 2 NC 1 COMMON 1 PTT NTO PTT OUTPUT PTT OUTPUT TX STANDBY PTT 9 5 VDC PTT SWITCHED 9 5 VDC SWITCHED J3 Y X J7 9 5 VDC PTT SWITCHED 9 5 VDC SWITCHED 8 10 9 1 7 9 8 10 ...

Page 64: ...DEDANIELS ELECTRONICS 5 2 Transmitter Main Board Instruction Manual This Page Intentionally Left Blank ...

Page 65: ... H Designations DWG REV DATE 3 4 JF3 AUDIO IN C23 100nF R42 OPT FSW4 BCD 10 FSW3 BCD 10 FSW2 BCD 10 FSW1 BCD 10 MSD LSD Components Not Installed 12B SYNTHESIZER GROUND TAB Low Power Synthesizer Only SYNTHESIZER GROUND TAB Low Power Synthesizer Only OS 3 RF OUTPUT OC 3 RF OUTPUT OS 3H ENHANCED SYNTHESIZER OR OC 3 CRYSTAL CONTROL MODULE OST 3H RF OUTPUT TP19 TP20 TP22 TP21 32 30 28 26 24 22 20 18 16...

Page 66: ...6 LPF25 LPF24 LPF23 LPF22 LPF21 LPF20 LPF19 LPF18 LPF17 LPF16 LPF15 LPF12 LPF10 LPF8 LPF3 LPF5 LPF4 LPF2 LPF1 D8 BAS 16 y J3 x y J2 x x y J21 U6 LP 2951 y J7 x J14 y R29 82k5 x J13 y R5 10R0 J16 R110R0 R30 15k0 C15 4 7µF C14 10nF D7 BAS 16 M2 5 PRESS NUT x LPF14 C10 1 µF y J25 x R16 10k0 x y x y J20 J23 x y J19 J22 J24 x J15 y C20 4 7µF 16V U8 MC14536B R39 221K U7 33172 R32 1k00 R34 27k4 R33 68k1 ...

Page 67: ... TP27 2 3 1 MC33172 a U1 4 5 6 7 8 MC33172 b U1 BYD17J D3 27K4 R6 BYD17J D4 BAS16 D8 10R0 R5 1K0 R7 27K4 R8 TP28 10nF C6 100K0 R10 221K0 R9 9 5V 9 5V TP26 8 9 10 MC14081 c U2 13 12 11 MC14081 d U2 100nF C8 9 5V 5 6 4 14 7 MC14081 b U2 1 2 3 MC14081 a U2 9 5V G D S D15N06V Q9 E B C BC807 25 Q8 10K0 R18 TP11 E B C BC817 25 Q1 E B C BC817 25 Q3 9 5V 9 5V E B C BC817 25 Q4 BYD17J D5 BYD17J D6 J6 TP7 G...

Page 68: ...ual 5 3 Front Panel Board 5 3 1 Front Panel Board Component Layout D1 MIC 1 2 3 4 PF2 SW1 PF1 c b a f e d KEYED NORM J1 Y X Solder Jumper On Solder Side Of PCB Factory Installed Solder Jumper MT3TXMNM5A PF3 J2 Y X 43 921212 P1 2 1 4 3 6 5 8 7 1 2 3 4 1 2 3 4 1 2 3 4 ...

Page 69: ...IC 1 MIC 3 MIC 4 MIC 2 PF2 1 PF2 4 PF2 3 PF2 2 PF1 3 PF1 2 PF1 1 PF1 4 X M GAUBE MT 3 FRONT PANEL BOARD 43 921212 1 2 PF3 2 PF3 1 PF3 4 PF3 3 Y X 07 APRIL 1992 28 MAY 97 MT3TXMNM6A D1 J1 N I C1 1 2 3 4 MIC 1 2 3 4 PF1 PF2 4 2 1 3 PF3 1 2 3 4 5 6 7 8 P1 J2 F E D C B A SW1 9 5V IN LED ENA MIC PTT NTO MIC PTT WTO MIC INPUT MIC INPUT MIC PTT MIC PTT RX MON RX MON 9 5V OUT 9 5V OUT RX AUDIO RX AUDIO 13...

Page 70: ...13 R15 49k9 C17 10nF R80 68k1 R13 49k9 R51 1k50 JU6 R50 221k R49 27k4 R41 11k8 R52 11k8 JU29 JU14 JU10 JU9 JU15 C19 150pF JU27 JU36 JU16 JU7 R16 100k R47 4k53 JU39 C49 10nF C52 4 7µF C18 100nF R43 11k8 JU1 R74 27k4 C50 4 7µF JU38 JU30 JU35 JU34 JU28 C51 100nF R79 49k9 R77 20k0 R78 49K9 JU37 R45 39k2 JU31 JU8 JU33 JU32 R73 221k R72 39k2 C58 150pF R61 221k R71 63k4 R46 4k53 R40 1k50 Y X X Y X Y Y X ...

Page 71: ... 100nF C28 4 7uF C29 1k50 R32 47uF C31 221k R34 3 4 5 1 6 2 7 8 SL6270 U2 5k R31 681R R30 4 7uF C30 1k50 R33 6 8µF C33 4 7nF C32 1k00 R36 150pF C34 1k00 R35 330nF C35 100k R38 20k0 R37 10pF C36 1k50 R40 4 7nF C37 11k8 R41 50k R29 221k R50 27k4 R49 150nF C41 1k50 R51 4 7nF C43 22nF C23 3k48 R26 3k48 R25 10nF C24 15nF C25 13k3 R28 13k3 R27 1 0nF C26 FB1 100nF C14 11k8 R52 2k21 R20 49k9 R13 330nF C39...

Page 72: ... 100nF R12 N I R51 1k50 R40 1k50 R44 0R0 X Y Y X C11 100nF JU36 Y X JU40 R45 N I C20 100nF R22 49k9 DWG No TXADPROAT1 TITLE MT 3 Tx Audio Processor Through Hole Layout 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 DWG No TXADPROAT2 TITLE MT 3 Tx Audio Processor Through Hole Designations C24 10nF C47 1 0µF C46 100nF C27 33nF C48 1 0µF C44 330nF C38 330nF C41 150nF C23 22nF C25 15nF C26 1 0nF C21 10nF C22 10nF C3...

Page 73: ...YMMETRY ADJUST BALANCED INPUT LEVEL CONTROL 3 P1 2 P1 1 P1 4 P1 3 P3 3 P2 1 P2 1 P4 3 P4 2 P2 1 P3 2 P4 4 P4 9 5V CONTINUOUS 1 2 100nF C46 1 2 JU4 1 2 JU37 1 2 R76 0R0 1 2 R72 0R0 1 2 R8 49K9 1 2 JU16 4 P2 9 5V CONTINUOUS 1 2 C30 4 7uF 1 2 C7 2 2uF 1 2 C9 4 7uF 1 2 C3 4 7uF 1 2 R10 49K9 1 2 R11 49K9 1 2 C2 2 2uF 1 2 C8 10uF 2 1 3 JU22 1 2 10nF C10 1 2 10nF C15 9 5V CONTINUOUS 9 5V CONTINUOUS 9 5V ...

Page 74: ...DEDANIELS ELECTRONICS 5 12 Transmitter Main Board Instruction Manual This Page Intentionally Left Blank ...

Page 75: ...E 3AMP FAST BLO 1 1 4 IN 5604 5GAGC030 Optional FH1 FH2 FUSE CLIP O 250 DIAM W EAR 5609 C250P01B Optional FSW1 4 SWITCH BCD 10 STEPS 5 PIN PCB 5273 10BCD001 JS1 1 SOCKET STRIP 1 ROW X 12 PIN 5016 SL112G08 JS1 13 SOCKET STRIP 1 ROW X 9 PIN 5016 SL109G08 JS2 1 SOCKET STRIP 1 ROW X 6 PIN 5016 SL106G08 JS3 1 SOCKET STRIP 1 ROW X 2 PIN 5016 SL102G08 LPF1 5 FILTER SM EMI LPF 360 PF FER 1306 T361F2D5 LPF...

Page 76: ...1150 4A2742FP R26 RES SM 1k00 0805 1 100 ppm 1150 3A1001FP R28 RES SM 15K0 0805 1 100ppm 1150 4A1502FP R29 RES SM 82k5 0805 1 100 ppm 1150 4A8252FP R30 RES SM 15K0 0805 1 100ppm 1150 4A1502FP R31 RES SM 221k 0805 1 100ppm 1150 5A2213FP R32 RES SM 1k00 0805 1 100ppm 1150 3A1001FP R33 RES SM 68k1 0805 1 100ppm 1150 4A6812FP R34 R35 RES SM 27k4 0805 1 100ppm 1150 4A2742FP R36 RES SM 221k 0805 1 100pp...

Page 77: ...TEEL 5814 3M0LK00S 4 MIC CONN 4 PIN MALE BLACK 5040 114ST0BK 1 NAMEPLATE BLANK 14HP ALUM 3702 10001214 1 NUT M2 5 HEX 5 0mm STEEL Ni 5813 2M5HX50N 2 NUT M2 5 SQUARE 5 0mm ZINC 5813 2M5SQ50Z 2 NUT PRESS M2 5 5 6mm OD PC MNT 5833 T2M55615 1 PANEL FRNT W IDENT TX EXTR VER 3802 61002101 1 PANEL REAR POS 4 14HP EXTRSN 3702 63002101 1 SCREW M3 x 8 PAN PHIL BLACK 5812 3M0PP08T 4 SCREW M3 x8 OVAL C S PHIL...

Page 78: ...F CER 0805 C0G 1008 1A100J1G C14 CAP SM 100nF CER 0805 X7R 50V 1008 5A104K5R C15 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C16 CAP 4 7nF FILM MMK5 10 63V 1016 3A472K63 C17 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C18 CAP SM 100nF CER 0805 X7R 50V 1008 5A104K5R C19 CAP SM 150pF CER 0805 C0G 1008 2AI5IJIG C20 CAP SM 100nF CER 0805 X7R 50V 1008 5A104K5R C21 C22 CAP 10nF FILM MMK5 10 63V 1016 4A103...

Page 79: ...A6811FP R4 RES SM 221k 0805 1 100ppm 1150 4A2212FP R5 R6 RES SM 1k00 0805 1 100ppm 1150 3A1001FP R7 RES SM 20k0 0805 1 100ppm 1150 4A2002FP R8 POT SM 4mm SQ 100k 11T SIDE ADJUST 1174 DM4104J0 R9 RES SM 221k 0805 1 100ppm 1150 4A2212FP R10 R11 RES SM 49k9 0805 1 100ppm 1150 4A4992FP R12 RES SM 11k8 0805 1 100ppm 1150 4A1182FP R13 RES SM 49k9 0805 1 100ppm 1150 4A4992FP R14 POT SM 4mm SQ 50k 11T SID...

Page 80: ...0 0805 1 100ppm 1150 4A2002FP R78 R79 RES SM 49k9 0805 1 100ppm 1150 4A4992FP R80 RES SM 68k1 0805 1 100ppm 1150 4A6812FP R81 THERMISTOR 10k NTC 10 RADL 1180 4RDG103K R82 R83 RES SM 27k4 0805 1 100ppm 1150 4A2742FP R84 R85 RES SM 39k2 0805 1 100ppm 1150 4A3922FP R86 R87 RES SM 22k1 0805 1 100ppm 1150 4A2212FP R88 R89 RES SM 100k 0805 1 100ppm 1150 5A1003FP R90 RES SM 10K0 0805 1 100ppm 1150 4A1002...

Page 81: ...AP 1 0µF FILM MMK5 10 50V 1016 6D105K50 C49 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C50 CAP SM 4 7µF TANT 10 16V 1055 5B475K16 C51 CAP SM 100nF CER 0805 X7R 50V 1008 5A104K5R C52 CAP SM 4 7µF TANT 10 16V 1055 5B475K16 C53 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C54 C55 CAP SM 4 7µF TANT 10 16V 1055 5B475K16 FB1 FERRITE BEAD 43 MIX 1812 PKG 1213 43181200 P1 P4 HEADER 0 1 R A 2 ROW X 2PIN 5010...

Page 82: ...1150 TBA R46 R47 RES SM 4k53 0805 1 100ppm 1150 3A45315P R48 POT SM 4mm SQ 100k 11T SIDE ADJUST 1174 DM4104J0 R49 RES SM 27k4 0805 1 100ppm 1150 4A2742FP R50 RES SM 221k 0805 1 100ppm 1150 5A2213FP R51 RES SM 1k50 0805 1 100ppm 1150 3A1501FP R52 RES SM 11k8 0805 1 100ppm 1150 4A1182FP R53 RES SM N I 0805 1 100ppm 1150 TBA R54 RES SM 274R0 0805 1 100ppm 1150 2A2740FP R55 RES SM 49K9 0805 1 100ppm 1...

Page 83: ... to support all options on the New Transmitter Main Board Also the Front Panel Board is now easier to configure if new microphones other than Daniels microphones are used The new FPB can be used on the old TX 3 main all options will function However the old version of FPB will NOT work with the new version TX 3 Main PCB unless you hard wire one of the microphone pins into the main PCB 13 8V line A...

Page 84: ...ard Instruction Manual ISSUE DATE REVISION 3 Nov 98 Updated the DE logo and added the statuary trademark statement to the title page Updated the Low Frequency Modulation section 3 11 to reflect the in house document A0361 06 ...

Page 85: ...publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd DE is a registered trademark of Daniels Electronic Ltd registered in the U S Patent and Trademark Office Issue 2 Previous Issue 1 Issue Date November 2000 Previous Issue Date Octo...

Page 86: ...ipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development This equipment may incorporate minor changes in detail from the information contained in this manual ...

Page 87: ...Modulation Input 2 2 3 THEORY OF OPERATION 3 1 4 ALIGNMENT 4 1 4 1 Standard Deviation Adjustment 4 1 4 2 Balanced Input Setup 4 1 4 3 Microphone Input Setup 4 1 4 4 Subtone Input Setup 4 2 4 5 Balanced Input Frequency Response 4 2 5 TROUBLESHOOTING TEST EQUIPMENT NEEDED 5 1 5 1 Balanced Input Test 5 1 5 2 Frequency Response Test 5 1 5 3 Subtone Input Test 5 2 5 4 Audio benchmarks 5 2 6 TEMPERATURE...

Page 88: ... REVISION HISTORY 10 1 LISTS OF FIGURES Figure 1 Block Diagram Audio Processor 1 3 Figure 2 Pin Connection Diagram 1 4 Figure 3 Microphone and Balanced Input Circuitry 3 1 Figure 4 Limiter and Splatter Filter 3 2 Figure 5 Bypassing Compression 3 3 Figure 6 TX Audio Control Circuitry 3 4 LIST OF TABLES Table 1 Bandwidth Definition 1 1 Table 2 Factory Configuration 1 4 Table 3 Turn On Time 1 5 Table...

Page 89: ...ital modulations that require very low frequency modulation to the synthesizer or crystal oscillator module Separate voice and direct modulation outputs each individually configurable Multiple jumpers that can be configured to allow maximum flexibility in routing signals from inputs to outputs and disabling selected circuits to reduce operating current Dual microphone and balanced audio compressio...

Page 90: ... The 6 audio inputs on the FM Audio Processor are DYNAMIC MICROPHONE INPUT 600 OHM BALANCED INPUT subtone inputs auxiliary input direct modulation input for data signals The Audio Processor s balanced input pins are isolated by a transformer T1 on the Transmitter Main Board Two audio outputs from the MT 3 Audio Processor are routed to the Synthesizer or Crystal Controlled Oscillator Modules ...

Page 91: ...ct Modulation Offset Buffer TCVCXO Modulation Buffer Offset TCVCXO DC Level Adjust Reg Mod Out Low Freq Out Inverting Amp Coupling Select 2 Port Polarity Select JU35 JU34 Tx Audio Control Wide Narrow Band Select Data Voice Select 3dB Narrow Band Pad JU14 JU26 JU27 JU30 JU43 JU28 JU25 49K9 49K9 P1 3 R2 U1A U1B P1 1 R31 Tone Digital Input P2 1 Balanced Input Microphone Input U3A U3B U2A U2C U2D P2 2...

Page 92: ...60 rated system deviation 1 kHz signal compression set at 84 rated system deviation Audio Balanced Input pre emphasis response 1 kHz tone at 8 dBm gives 60 rated system deviation 1 kHz signal compression set at 84 rated system deviation Subtone Input 1 100 Hz tone at 18 dBm gives 500 Hz Wideband 350 Hz Narrowband deviation All other audio inputs Disabled PCB 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 P1 P2 P...

Page 93: ...al option to address low frequency user modulation requirements A phase modulated bandwidth from 0 dc to 100 Hz PLL loop filter bandwidth allows specialized applications such as paging or trunking where a separate low frequency digital analog modulation channel is required Low Frequency Modulation allows external access to the low frequency modulation capabilities of the synthesizer module The DIR...

Page 94: ...hed Disabled Not Installed 2a IN Y X Always enabled PTT Switched Switched 8 0V X 2b IN Y X Always enabled PTT Switched Continuous 9 5V Y 2c IN Y X Always enabled PTT Switched Disabled Not Installed 3 IN X Y PTT Switched Always enabled Doesn t matter 4 IN X X Always enabled Always enabled Doesn t matter Table 5 Standby Mode Selection Table MODE Total Xmtr Standby Current Startup Time 1a 13 mA 6 mA ...

Page 95: ...n control pot R29 before buffer amplifier U3D In special applications jumper JU6 can be disabled and JU7 enabled this allows the transmitter to be modulated directly from the auxiliary input This should not be done without external filtering since jumper JU7 bypasses the limiting and filter circuits 2 3 Low Frequency Direct Mod Output The Low Frequency Direct Modulation Output port has two functio...

Page 96: ... and there is no filtering or limiting action provided by the auxiliary input The input level to the auxiliary input should be 18 dBm and can be driven by one of three inputs the balanced input JU11 the tone digital input JU12 X or Y enabled the direct modulation input through JU28 When the 600 ohm balanced input is connected to the auxiliary input the balanced input level control can be used to a...

Page 97: ...DIO PRE EMPHASIS X Y TW O PORT POLARITY SUB TONE 1 INP U T CONTROL LEV E L 3 P1 2 P1 1 P1 4 P1 3 P3 3 P2 1 P2 4 P2 9 5V CONTINUOUS C10 10nF 4K53 R46 C5 10nF 1 2 3 R2 5K0 FB1 8 0V SWD 8 0V SWD 1 2 3 JU5 47uF C13 3 2 1 100K0 R48 680nF C7 4 7uF C8 TP3 SEL R57 N I 22nF C32 Rect In Var G Rect Cap Output Inv In R3 THD Trim 15 14 16 10 12 11 9 U1 SA571D a 680nF C42 TP12 4 7uF C26 Vcc Rect In Var G Rect C...

Page 98: ...U3 MC33174 b 1 2 R19 SEL 1 2 SEL R27 1 2 C21 1 0uF 1 2 C6 1 0uF 4 0V 4 0V 8 0V SWD TP5 R84 10K0 R85 10K0 TP10 1 2 150pF C43 TP14 1 2 3 JU24 1 2 3 JU3 Figure 4 Limiter and Splatter Filter The audio then is filtered by a 10th Order Linear Phase Lowpass splatter filter This filter improves on the previous Butterworth filter design for data linearity and increased cutoff attenuation responses mandated...

Page 99: ...NTRO L B A LANCED INPUT X Y AUXILIARY INPUT LEV E L CONTRO L BALANCE D A GC PRE AMP BA LANC E D COMPRE S S I O N CONTROL FLATAU DI O PRE EMPHASIS X Y X Y FLAT AUDIO PRE EMPHASI S X Y TW O PORT POLAR I TY 2 P1 1 P1 C10 10nF 1 2 3 JU5 3 2 1 100K0 R48 680nF C7 4 7uF C8 TP3 SEL R57 N I 22nF C32 Vcc Rect In Var G Rect Cap Output Inv In R3 THD Trim GND 2 3 1 7 5 6 8 13 4 SA571D U1 b 9 10 8 U2 MC33174 c ...

Page 100: ... 47uF C34 R12 N I R79 49K9 JU7 In In Gnd V Vout V Rx Div Clk 1 2 3 4 8 7 6 5 U4 LTC1569 6 R66 22K1 R67 30K9 R68 3K48 R69 2K00 8 0V SWD P11 P12 P9 P10 9 10 8 U3 MC33174 c 0R0 R72 0R0 R58 1 2 C21 1 0uF 1 2 C6 1 0uF R37 49K9 R34 49K9 4 0V C24 10nF 8 0V SWD 4 0V JU23 TP7 TP8 TP9 SEL R81 JU41 10nF C41 R86 10K0 3 2 1 R83 50K0 R53 N I R80 27K4 8 0V SWD 1 2 3 JU35 R78 10K0 2 3 1 JU39 1 2 3 JU34 JU38 C23 3...

Page 101: ...UT LEVEL CONTROL R38 COMPRESSION CONTROL R29 DEVIATION CONTROL all maximum clockwise 3 Set audio generator to 2 4 kHz at 0 dBm 4 Adjust R29 for 4 8 kHz Wideband or 2 4 kHz Narrowband 5 Set audio generator to 1 kHz at 0dBm 6 Set R38 for 4 2 kHz Wideband or 2 1 kHz Narrowband 7 Repeat steps c to f slight interaction 8 Set audio generator to 1 kHz at 8 dBm 9 Adjust R31 for 3 0 kHz Wideband or 1 5 kHz...

Page 102: ...500 Hz Wideband or 350 Hz Narrowband deviation Remove the signal 4 5 Balanced Input Frequency Response Apply a 1 kHz tone at 18 dBm to the BALANCED INPUT Transmitter Main Board edge connector pins B18 Z18 Record deviation and use this level as the 0 dB reference Sweep frequency from 100 Hz to 5 kHz The audio response should be within 1dB from 300 Hz to 2500 Hz ...

Page 103: ...sure total current from both power line inputs Table 7 Operating Current Voltage Input Current mA 8 0V 15 7 9 5V 0 47 5 1 Balanced Input Test Connect an Audio Generator set for a 2 4 kHz tone 0 dBm 775 mV RMS output to the Balanced Input P1 1 and P1 2 Refer to Table 8 Waveform Levels for measurement points levels and waveforms that should be present Change Audio Generator settings for a 1 kHz tone...

Page 104: ...o 2 4 kHz 0 dBm at the Balanced Input Compare the waveform levels with those listed in table below Repeat for the various audio frequencies and levels and compare with the levels in the table below Table 8 Waveform Levels Limiting Test Std Level Mic Test Subtone Measured 2 4kHz 0dBm 1 kHz 8dBm 1 kHz 10 dBm 100 Hz 18 dBm TP3 5 2V P P 3 8V P P N A N A TP12 N A N A 3 8V P P N A TP10 6 5V P P 4 9V P P...

Page 105: ...pecification is as follows Wideband When a 2 4 kHz tone is applied at a level of 8dBm to the balanced input of the transmitter the transmitter deviation shall be 4 8 kHz at room temperature and can vary from 4 5 kHz to 5 0 kHz from 40ºC to 60ºC Narrowband When a 2 4 kHz tone is applied at a level of 8 dBm to the balanced input of the transmitter the transmitter deviation shall be 2 4 kHz at room t...

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Page 107: ...dio Gate disable 19 XY Y Voltage Select 9 5V 8V Audio gates Y Y Y Y 20 XY Open Direct Modulation Audio Routing 21 XY X Audio Gate Switch X X X X 22 XY Y Splatter Filter Enable Bypass Y Y Y Y 23 Single Open Narrow Band gain reduction Not Installed Not Installed Installed Installed 24 XY Factory Custom Temperature Compensation Network Contact Factory Contact Factory Contact Factory Contact Factory 2...

Page 108: ...27 SEL C37 3 3nF C32 N I 22nF P1 TITLE FM TX AUDIO PROCESSOR TH DESIGNATIONS P5 P8 P6 P7 C15 3 3nF R19 SEL DWG No 9119AT2 Wire Jumper for UHF versions only 7 2 FM Audio Processor Board Instruction Manual P10 P11 TP3 TP11 TP4 TP12 TP7 TP9 TP6 TP1 TP10 TP2 TP8 P9 P5 P8 P6 7 2 FM Audio Processor Component Layout V2 3 P12 P7 TP13 TP5 TP14 MICROPHONE INPUT LEVEL CONTROL BALANCED INPUT LEVEL CONTROL BAL...

Page 109: ...C PREAMP TITLE MT 3 TXAUDIO PROCESSOR SCHEMATIC DIAGRAM Y X AUXILIARY INPUT LEVEL CONTROL NOT INSTALLED FOR DIGITAL MOD 9 5V CONTINUOUS Y X Y X Y X Y X LOW FREQUENCY DIRECT MODULATION OUTPUT high voice low data DEVIATION CONTROL Y X DIRECT MODULATION INPUT APRVD BALANCED INPUT MICROPHONE INPUT LEVEL CONTROL PRE EMPHASIS FLAT AUDIO BALANCED INPUT LEVEL CONTROL 3 P1 2 P1 1 P1 4 P1 3 P3 3 P2 1 P2 1 P...

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Page 111: ...1206 X7R 16V 1008 6B105Z4R C26 CAP SM 4 7uF TANT 10 16V 1055 5B475K16 C27 CAP SM 100nF CER 0805 X7R 1008 5A104K5R C28 CAP SM 4 7uF TANT 10 16V 1055 5B475K16 C29 CAP SM 47uF TANT 20 16V 1055 6D476M16 C30 CAP SM 1 0uF CER 1206 X7R 16V 1008 6B105Z4R C31 CAP SM 47uF TANT 20 16V 1055 6D476M16 C32 CAP N I 22nF FILM MMK5 10 63V 1016 4A223K63 C33 CAP SM 1 0uF CER 1206 X7R 16V 1008 6B105Z4R C34 CAP SM 47uF...

Page 112: ...0 TBA R18 RES SM SEL 0805 1 100ppm 1150 TBA R19 THERMISTOR SEL NTC 10 AXIAL 1180 4RDG103K R20 RES SM SEL 0805 1 100ppm 1150 TBA R21 RES SM 49K9 0805 1 100ppm 1150 4A4992FP R22 RES SM 49K9 0805 1 100ppm 1150 4A4992FP R23 RES SM SEL 0805 1 100ppm 1150 TBA R24 RES SM SEL 0805 1 100ppm 1150 TBA R25 RES SM SEL 0805 1 100ppm 1150 TBA R26 RES SM SEL 0805 1 100ppm 1150 TBA R27 THERMISTOR SEL NTC 10 AXIAL ...

Page 113: ...1150 3A2001FP R70 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R71 RES SM 5K11 0805 1 100ppm 1150 3A5111FP R72 RES SM 0R0 0805 1 100ppm 1150 0A0R0000 R73 RES SM N I 0805 1 100ppm 1150 NOTINST R74 RES SM N I 0805 1 100ppm 1150 NOTINST R75 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R76 RES SM 16k2 0805 1 100ppm 1150 TBA R77 RES SM 20K0 0805 1 100ppm 1150 4A2002FP R78 RES SM 10K0 0805 1 100ppm 1150 4A1002FP ...

Page 114: ...8 4 This Page Intentionally Left Blank ...

Page 115: ...he other modules The front and rear back plates are attached to the Transmitter Main Board and together with the extruded aluminum shell as discussed in the assembly section of the Transmitter Manual form the transmitter enclosure 9 2 Performance Specifications Type MT 3 AM Series Transmitter Compatibility VT 3A Series Amplifier OCT 3 Crystal Oscillator OST 3 Frequency Synthesizer Modulation 6K00A...

Page 116: ...module also has an on board programmable push to talk PTT time out timer TOT on an attached circuitboard A continuous 9 5 Vdc supply and a continuous 13 8 Vdc supply together with a switched 8 0 Vdc supply are required to power the module Refer to section 9 11 MT 3 AM Audio Processor Component Layout and to section 9 12 MT 3 AM Audio Processor Schematic Diagram for component location and designati...

Page 117: ...jumper J18 in the x position the audio processor is enabled all of the time the synthesizer is enabled all of the time standby current typically 163 mA start up time typically 12 ms 9 7 Audio Circuitry The MT 3 AM Tx Audio Processor refer to section 9 12 MT 3 AM Audio Processor Schematic Diagram has two audio inputs Microphone input and Balanced input which can be used to modulate the transmitter ...

Page 118: ... 3 AM Audio Processor as given in section 9 8 before beginning the standard modulation adjustment procedure If the transmitter s channel frequency changes the audio processor should be realigned to optimize the transmitter s performance The schematic diagram for the audio processor is shown in section 9 12 and the component layout is shown in section 9 11 Note clockwise rotation of controls increa...

Page 119: ...d then to 17V the modulation of the output RF signal should remain at the same level of 90 7 and distortion should be less then 3 This step verifies the correct operation of the power regulator on the transmitter amplifier board 13 Repeat steps 7 and 9 if required 14 Supply a 1 kHz 10 dBm signal to the microphone input Note the level restriction of 25 dBm to 0 dBm 15 Adjust the Microphone Input Le...

Page 120: ...9 10 This Page Intentionally Left Blank ...

Page 121: ...5 5B475K16 C13 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C14 CAP SM 100nF CER 0805 X7R 50V 1008 5A104K5R C15 CAP 4 7nF FILM MMK5 10 63V 1016 3A472K63 C16 CAP 2 2nF FILM MMK5 10 63V 1016 3A222K63 C17 CAP SM 330pF CER 0805 C0G 1008 2A331J1G C18 CAP SM 220pF CER 0805 C0G 1008 2A221J1G C19 CAP SM 1 0uF TANT 20 35V 1055 5B105M35 C20 CAP SM 220pF CER 0805 C0G 1008 2A221J1G C21 CAP SM 4 7uF TANT 10 16V...

Page 122: ...49K9 0805 1 100ppm 1150 4A4992FP R16 POT SM 5K0 4mm SQ 11T SIDE 1174 DM2502J0 R17 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R18 RES SM 470K0 0805 1 100ppm 1150 5A4703FP R19 RES SM 5K11 0805 1 100ppm 1150 3A5111FP R20 RES SM 39K2 0805 1 100ppm 1150 4A3922FP R22 RES SM 3K48 0805 1 100ppm 1150 3A3481FP R23 RES SM 51K1 0805 1 100ppm 1150 4A5112FP R24 RES SM 15K4 0805 1 100ppm 1150 4A1542FP R25 RES SM 82...

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Page 124: ...7uF R26 3M3 C6 100nF R27 681R0 R16 5k0 Balanced Input Level Adjust R17 10k0 R10 27K4 R11 27K4 C11 2 2uF R13 18k2 R14 100k0 Modualtion Control Output Adjust R22 3K48 R25 82k5 R9 10k0 U2 MC33174 C23 220pF C19 1 0uF R18 470k0 DWG No VAP130AS2C TITLE TX AM AUDIO PROCESSOR SURFACE MOUNT DESIGNATIONS C7 10nF JU1 JU8 JU4 X Y JU7 DWG REV DATE MARCH 06 98 X Y JU3 Y X JU6 X Y JU5 X Y C22 680pF R28 82k5 JU2 ...

Page 125: ...4 SA571D U1a Rect In Var G Rect Cap Output Inv In R3 THD Trim 15 14 16 10 12 11 9 SA571D U1b 100K0 R6 TP3 680nF C3 100nF C6 10nF C7 TP4 C8 680nF C9 4 7uF C10 470nF R13 18K2 CW 5K0 R16 4 7uF C12 1 0nF C13 R18 470K0 TP5 TP6 4 7uF C21 TP8 MT 3 TX TIME OUT TIMER 3 P1 2 P5 1 P1 2 P1 3 P2 4 P1 4 P3 4 P5 4 P2 1 P3 8 0V 9 5V 8 0V P7 1 P8 1 P9 1 P6 1 J7 1 J8 1 J6 1 J5 1 1N5221B D1 1N5221B D2 681R0 R27 2 2u...

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Page 127: ...ion Manual 10 1 10 REVISION HISTORY ISSUE DATE REVISION 1 Oct 2000 First Issue 2 Nov 2000 Second Issue Incorporated the AM Audio Processor documentation into this manual For specific AM revision history see manual IM22 MT3AMTXMN 4IM ...

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Page 129: ...is publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd Issue 1 Previous Issue N A Issue Date May 1998 Previous Issue Date N A Daniels Electronics Ltd Printing Date January 2001 Victoria B C Part No IM21 VT3150AMP PRINTED IN CANADA ...

Page 130: ... equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development This equipment may incorporate minor changes in detail from the information contained in this manual ...

Page 131: ...Recommended Test Equipment List 3 1 3 4 Printed Circuitboard Numbering Convention 3 2 3 5 Standard Factory Settings and Jumper Configuration 3 2 3 6 VT 3 150 Amplifier Alignment 3 2 3 6 1 General 3 2 3 6 2 VT 3 150 Amplifier Adjustment 3 3 3 6 2 1 General Set Up 3 3 3 6 2 2 Output Power Alarm Forward Power 3 4 3 6 2 3 Output Power 3 5 3 6 2 4 Antenna VSWR Alarm Reverse Power 3 5 3 6 2 5 Antenna VS...

Page 132: ...uction Manual VT 3 132 174 MHz 5 PARTS LISTS 5 1 5 1 VT 3 150 Amplifier Electrical Parts List 5 1 5 2 VT 3 150 Low Pass Filter Electrical Parts List 5 3 5 3 VT 3 150 Amplifier Mechanical Parts List 5 3 6 REVISION HISTORY 6 1 ...

Page 133: ...ding the general public for transmitter equipment operating below 10 GHz as defined in the references above is 2 W m2 0 2 mW cm2 B This transmitting equipment is designed for use with an outdoor antenna with a characteristic antenna gain of 10 dBi typically mounted at a significant height above ground to provide for adequate signal coverage To ensure that the general public is not exposed to a pow...

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Page 135: ...oximately halving the amplifier s RF gain when a VSWR overload condition is present Output filtering for the VT 3 150 Amplifier is provided by the VT 3 150 Lowpass Filter Board The lowpass filter assembly is mounted in a separate compartment of the amplifier case in order to provided maximum attenuation of harmonic and other spurious signals Refer to Section 4 for the VT 3 132 174 MHz VHF amplifie...

Page 136: ... only Operating Temperature Range 30 C to 60 C optional 40 C temperature test Operating Humidity 95 RH non condensing at 25 C Operating Voltage 13 8 Vdc Nominal range 11 to 16 Vdc 9 5 Vdc Regulated Transmit Current 0 7 Amp typical 1 1 Amp maximum Amplifier Standby Current less than 0 5 mA Amplifier Enable Active to ground Amplifier Enable Response typically overdamped rising to within 90 of full p...

Page 137: ...ounding the amplifier s input enable line The synthesizer or crystal control module will ground the input enable line only when the RF signal from the synthesizer or crystal control module is phase locked This prevents unwanted spurious emissions during transmitter start up A typical start up sequence is shown below 1 the transmitter is keyed on 13 8 Vdc is always present 2 9 5 Vdc is switched on ...

Page 138: ...arlier this is done by the VT 3 150 Lowpass Filter 2 3 1 VT 3 150 Lowpass Filter The VT 3 150 Lowpass Filter is a 50 ohm 9 pole reciprocal filter with a 3 dB cutoff frequency of approximately 185 MHz The lowpass filter assembly attenuates the desired signal s harmonics as well as any other out of band emissions so that a clean RF signal is output to the antenna connector 2 4 Power Control Circuitr...

Page 139: ...larm adjust potentiometer The amplified voltage is then output directly in linear operation JU1 installed JU2 not installed or compared by op amp U1a which then drives transistors Q4 and Q3 for open collector operation JU1 not installed JU2 installed In open collector configuration Q3 the open collector output transistor is turned on when an alarm condition occurs The adjustment range for the outp...

Page 140: ...ge set by R37 is the compared to the output power alarm setpoint by op amp U2a which then drives transistor Q6 When transistor Q6 turns on signaling an overload condition resistor R14 is grounded which reduces the output power setpoint Reducing the output power setpoint lowers the VT 3 150 Amplifier s gain and protects the amplifiers from excessive current draw resulting from high antenna VSWR The...

Page 141: ...ain Board and the amplifier cover removed to expose all amplifier circuitry All jumpers and test points are clearly marked 3 2 Repair Note The VT 3 150 Amplifier is mainly made up of surface mount devices which should not be removed or replaced using an ordinary soldering iron Removal and replacement of surface mount components should be performed only with specifically designed surface mount rewo...

Page 142: ...ntenna VSWR Alarm The corresponding jumper settings are Jumper JU1 not installed Output power alarm linear output Jumper JU2 installed Output power alarm open collector output Jumper JU3 installed Antenna VSWR alarm open collector output Jumper JU4 not installed Antenna VSWR alarm linear output 3 6 VT 3 150 Amplifier Alignment invisible text 3 6 1 General The VT 3 150 Amplifier is a frequency sens...

Page 143: ...output power alarm should always be set first The order of adjustment should be 1 Set the desired output power alarm level section 3 6 2 2 2 Set the output power section 3 6 2 3 3 Set the desired Antenna VSWR alarm level section 3 6 2 4 4 Set the desired overload condition level section 3 6 2 5 Details for the alignment steps are outlined below 3 6 2 1 General Set Up All of the setup steps detaile...

Page 144: ...if one is not already present 1 Adjust R7 the output power adjustment to the output power at which the Output Power Alarm is to be activated 2 Monitor transmitter pin B26 the Output Power Alarm line and slowly turn R21 the output power alarm adjustment clockwise until pin B26 goes low The alarm is now set for the current output power of the transmitter Linear Output 1 Open the amplifier case to di...

Page 145: ...with the 3 1 mismatch load 2 Monitor pin Z26 the Antenna VSWR Alarm line and turn R36 fully counterclockwise Pin Z26 should be high Slowly turn R36 clockwise until pin Z26 is pulled low Put the 50 ohm load back on again Pin Z26 should go high The reverse power trip point is now set for a VSWR of 3 1 Linear Output 1 Open the amplifier case to disable open circuit jumper JU3 and enable short jumper ...

Page 146: ...st R37 the VSWR overload adjustment clockwise until a noticeable drop in the 9 5 Vdc current occurs 4 Reconnect the radio communications test set and the 9 5 Vdc current should return to the previous level 3 6 2 6 Procedure Verification 1 Verify that the current drawn from the 13 8 Vdc supply is less than 1 5 A and from the 9 5 Vdc supply is less than 1 2 A when transmitting full RF output power 8...

Page 147: ...DEDANIELS ELECTRONICS 4 1 VHF Amplifier Instruction Manual VT 3 132 174 MHz 4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS This Page Intentionally Left Blank ...

Page 148: ...8 C11 JU1 JU2 JU3 JU4 3K48 221K C23 10n R14 10K 150p 49K9 VT 3 150 AMPLIFIER SM DESIGNATION LOW POWER 9326AS2 BYD17J R2 R3 178R 178R JU5 VT 3 150 AMPLIFIER SM LAYOUT HIGH POWER 9326AS3 100nF 10nF SELECT SELECT 1nF SELECT SELECT 49K9 49R9 150pF 49K9 1 5uH MMBD701 SELECT SELECT D5 C16 R15 R13 L5 C31 C33 C29 C37 C38 R12 TL1 C27 C28 C32 C34 VT 3 150 AMPLIFIER SM DESIGNATION HIGH POWER 9326AS4 SELECT C...

Page 149: ...1 R15 49R9 1k00 R35 49k9 R34 10nF C26 PZT2222A Q5 10k0 R44 50k R36 150pF C25 49k9 R33 1k00 R42 27k4 R43 10nF C23 6 5 8 7 4 MC33172 U2b 1 5uH L7 MMBD701 D7 10k0 R11 TL2 49R9 R16 49R9 R17 49k9 R22 10k0 R20 50k R21 49k9 R19 10nF C21 150pF C20 49k9 R18 1 5uH L6 MMBD701 D6 BC817 25 Q4 10k0 R29 1k00 R25 27k4 R28 BC817 25 Q6 10k0 R41 1k00 R39 221k R40 49k9 R27 10nF C17 49k9 R26 49k9 R30 PZT2222A Q3 10k0 ...

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Page 151: ...VHF Amplifier Instruction Manual VT 3 132 174 MHz 4 5 4 3 VT 3 150 VHF Lowpass Filter Component Layout invisible text 4 4 VT 3 150 VHF Lowpass Filter Schematic Diagram ...

Page 152: ...4 6 VHF Amplifier Instruction Manual VT 3 132 174 MHz This Page Intentionally Left Blank ...

Page 153: ...008 4B103K5R C29 CAP SM 1nF CER 1206 C0G 1008 3B102K1G C30 CAP 47µF DIP TANT 20 35V 1054 6M476M35 C31 CAP SM 51pF PORCEL 5 500V 1036 1B2510J5 132 150 MHz C31 CAP SM 24pF PORCEL 5 500V 1036 1B2240J5 150 174 MHz C32 CAP SM 5 6pF PORCEL 0 25pF 500V 1036 0B2569C5 132 150 MHz C32 CAP SM NOT INSTALLED NOT INSTALLED 150 174 MHz C33 CAP SM 68pF PORCEL 5 500V 1036 1B2680J5 132 150 MHz C33 CAP SM 51pF PORCE...

Page 154: ...817 25 NPN SOT 23 2120 BC817025 Q7 TRANSISTOR MRF262 VHF TO 220 2025 MRF26200 R1 RES SM 30R1 1206 1 100ppm 1150 1B30R1FP R2 R3 RES SM 178R 1206 1 100ppm 1150 2B1780FP R4 RES SM 49k9 1206 1 100ppm 1150 4B4992FP R5 RES SM 4k53 1206 1 100ppm 1150 3B4531FP R6 RES SM 27k4 1206 1 100ppm 1150 4B2742FP Default R6 RES SM 392k 1206 1 100ppm 1150 4B3922FP Exciter for VT 30 R7 POT SM 50k 12 TURN SIDE ADJUST 1...

Page 155: ...Low Pass Filter Electrical Parts List Ref Desig Description Part No C1 CAP SM 30pF PORCEL 5 500V 1036 1B2300J5 C2 C4 CAP SM 47pF PORCEL 5 500V 1036 1B2470J5 C5 CAP SM 30pF PORCEL 5 500V 1036 1B2300J5 L1 COIL 55nH 3 0 TURNS 18AWG 6 70mm ID 1220 3T001822 L2 L3 COIL 60nH 3 0 TURNS 18AWG 6 70mm ID 1220 3T001822 L4 COIL 55nH 3 0 TURNS 18AWG 6 70mm ID 1220 3T001822 PCB PCB LPF VT 3 150 UT 3 400 AMP 4321...

Page 156: ...S S 5812 3M0SA08S 3 SCREW M3 X 8 CAP SOCK M2 5 S S 5812 3M0SA08S 2 SET SCREW M3 X 3 HEX SOCKET A2 5817 3M0AC03S 1 SHOULDER WASHER M3 0 24 OD NYLON 5674 120N2440 1 TUBING TFE 260C 22AWG Thin 5mm 7610 260C22TW 1 TURRET TERMINAL 4 40 0 188L Tn 5053 144M188T 1 WIRE PVC STRANDED 16AWG RED 70 mm 7110 16S26302 1 ...

Page 157: ...VHF Amplifier Instruction Manual VT 3 132 174 MHz 6 1 6 REVISION HISTORY ISSUE DATE REVISION 1 Jul 97 First Issue ...

Page 158: ...6 2 VHF Amplifier Instruction Manual VT 3 132 174 MHz ISSUE DATE REVISION ...

Page 159: ...y be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd DE is a registered trademark of Daniels Electronics Ltd registered in the United States Patent and Trademark Office Issue 4 Previous Issue 3 Issue Date September 2000 Previous Issue Date March ...

Page 160: ...equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development The equipment covered by this manual may incorporate minor changes in detail from the information contained in this manual ...

Page 161: ... 2 6 2 4 1 BCD Switch Frequency Control 2 6 2 4 2 Frequency Select Handle Frequency Control 2 7 2 5 Synthesizer Base and Frequency Increment Table 2 7 2 6 5 0 6 25 kHz Channelization 2 8 2 7 8 333 kHz Channelization 2 8 2 8 12 5 kHz Channelization 2 9 3 SYNTHESIZER ALIGNMENT 3 1 3 1 General 3 1 3 2 Repair Note 3 1 3 3 Recommended Test Equipment 3 1 3 4 OS R T 3 A H Synthesizer Factory Configuratio...

Page 162: ...rd Component Layout Top 4 10 4 3 3 OS R T 3H 128 174 MHz Analog Board Schematic Diagram 4 11 4 4 OS R T 3H 406 470 MHz Analog Board Diagrams 4 13 4 4 1 OS R T 3H 406 470 MHz Analog Board Component Layout Bottom 4 13 4 4 2 OS R T 3H 406 470 MHz Analog Board Component Layout Top 4 14 4 4 3 OS R T 3H 406 470 MHz Analog Board Schematic Diagram 4 15 4 5 OS R T 3 A H Digital Board Diagrams 4 17 4 5 1 OS...

Page 163: ...een digital and analog circuitry Further shielding of the synthesizer s RF filter circuitry is provided by an internal shielded enclosure 1 2 OS R T 3 A H Enhanced Synthesizer Family Models The OS 3A H Synthesizer Module is utilized in both the MT 3 Receiver and Transmitter product lines In MT 3 Transmitters the OS 3A H synthesizer provides a modulated low level RF signal to the Power Amplifier mo...

Page 164: ...tput Frequency Band 406 470 MHz Common OS 3H4xx Analog Board OST 3H418 installed in FM transmitter 406 430 MHz RF output OST 3H460 installed in FM transmitter 450 470 MHz RF output OSR 3H440 installed in FM receiver 427 4 451 4 MHz RF output All OS 3A H Enhanced Synthesizer Modules regardless of the frequency band use the same digital PCB and mechanical construction There are however significant d...

Page 165: ...stment 38 MHz 50 MHz 1 0 MHz OST 3H045 is shown in brackets 50 4 MHz 71 4 MHz 1 0 MHz OSR 3H061 118 MHz 138 MHz Full band OST 3A128 128 MHz 152 6 MHz 2 0 MHz OST 3H141 OSR 3H141 139 4 MHz 159 4 MHz Full band OSR 3A149 150 MHz 174 MHz 2 0 MHz OST 3H162 OSR 3H162 406 MHz 430 MHz Full band OST 3H418 427 4 MHz 451 4 MHz Full band OSR 3H440 450 MHz 470 MHz Full band OST 3H460 Output Power 5 dBm 2 dBm i...

Page 166: ... Reference Input External reference input signal via SMB connector J1 Input level 0 dBm 3 dB Input impedance 50Ω Input frequency 10 0 MHz or 9 6 MHz selectable through digital board jumper JU1 Power Requirements Normal Configuration 9 5 Vdc 160 mA for FM and 65 mA for AM Low Current Standby Mode TCXO enabled 9 5 Vdc 14 mA for FM and 4 mA for AM ...

Page 167: ...ronics Ltd has adopted a printed circuit board PCB numbering convention in which the last two digits of the circuit board number represent the circuit board version All PCB s manufactured by Daniels Electronics Ltd are identified by one of the following numbering conventions PCB number 43 912010 indicates circuit board version 1 0 or PCB number 50002 02 indicates circuit board version 2 0 ...

Page 168: ...1 6 Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 470 MHz This Page Left Intentionally Blank ...

Page 169: ...ncy bands of 29 50 MHz 118 159 4 MHz 128 174 MHz and 406 470 MHz respectively All four analog boards are similar in operation and circuit topology with the VCO Loop Filter and Output Low pass Filter sections being band specific 2 2 1 Common Analog Board Circuitry This section describes the circuitry common to all versions of the FM Synthesizer Analog Board The Analog Board utilizes four optical re...

Page 170: ...d An optional modulation input is provided through connector P1 18 Digital Board and routed to the Analog board via connector P3 This connection must be coupled to a low impedance dc coupled source and provides a phase modulated bandwidth from 0 Hz DC to 50 Hz PLL loop filter bandwidth allowing for specialized applications such as paging or trunking where a separate low frequency digital analog mo...

Page 171: ...s provided through connection P1 and a voltage divider network formed by R21 and R22 A large signal division ratio established by the resistive dividers R21 and R22 allows low deviation less than 5 kHz direct frequency modulation of the VCO output signal The PLL low pass filter is formed by SELECT components C37 C38 C39 C45 R32 and R36 The loop filter response is optimized for switching time noise...

Page 172: ...put power is taken from the source of Q5 and amplified buffered by Q6 U11 provides further amplification and isolation while delivering 10 dBm into a five pole low pass output filter formed by C53 C58 C59 L11 and L12 The five pole low pass output filter with a cutoff frequency of 190 MHz effectively eliminates output harmonics SMB connector J2 provides interconnection to the companion transmitter ...

Page 173: ...uency band coverage Two VCO modules are used to cover the 406 470 MHz frequencies in the Transmitter module and the 427 4 451 4 MHz frequencies in the Receiver module The VCO modules are optimized for low phase noise however the transmitter VCO is additionally configured with modulation input capability PLL feedback control voltage at the output of the low pass loop filter controls the VCO frequen...

Page 174: ...itry 2 4 Frequency Control This is hidden text 2 4 1 BCD Switch Frequency Control Selection of the desired synthesizer output frequency is straightforward If all four of the CHANNEL SELECT lines CHAN SEL3 CHAN SEL0 are pulled low to GND the synthesizer will scan the four BCD switches FSW1 FSW4 located on the receiver and transmitter main circuit boards via connections SW1 COM SW4 COM and PC4 PC7 a...

Page 175: ...mple ASCII command protocols On power up or on any key press the synthesizer is interrogated by the FSH for the current channel number and corresponding channel frequency and this information is then briefly displayed on the FSH display The frequency may be either incremented or decremented from the displayed value by pressing the Frequency Increase È or Frequency Decrease Í button as appropriate ...

Page 176: ... is 0988 The synthesizer output frequency is 988 x 5 kHz 128 MHz 132 940 MHz BCD switch settings from 5000 to 9999 Subtract 5000 from the switch setting Multiply the result by 6 25 kHz and add the result to the synthesizer base frequency Example An OSR 3H162 synthesizer has a base frequency of 150 MHz The selected channel number is 7205 The synthesizer output frequency is 7205 5000 x 6 25 kHz 150 ...

Page 177: ...hesizers having 12 5 kHz channelization is determined as follows Multiply the BCD switch setting by 12 5 kHz and add the result to the synthesizer base frequency Example An OST 3H418 synthesizer has a base frequency of 406 MHz The selected channel number is 1660 The synthesizer output frequency is 1660 x 12 5 kHz 406 MHz 426 7500 MHz ...

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Page 179: ...ework and repair stations equipped with Electro Static Dissipative ESD protection When removing Surface Mount Solder Jumpers it is recommended that solder wick braid be used in lieu of vacuum type de soldering tools to help prevent damage to the printed circuit boards 3 3 Recommended Test Equipment Alignment of the synthesizer requires the following test equipment or its equivalent Power supply Re...

Page 180: ...ment section 3 5 5 5 A change in operating frequency from the initial factory setting that exceeds the synthesizer s maximum tuning range Refer to Specifications section 1 3 requires a more involved alignment procedure as described in sections 3 5 2 to 3 5 5 Conversion of a synthesizer from internal reference to external reference or vice versa is accomplished through selection of jumper JU1 A or ...

Page 181: ...rd removal is not required for tuning purposes Using a vacuum de soldering station de solder connections P1 P2 and P3 Remove SMB connectors J1 and J2 by de soldering the center pins and removing four M2 0 machine screws These connection points are shown in the OS R T 3 A H XXX XXX MHz Analog Board Component Layout Top diagrams Remove seven M2 0 machine screws and carefully remove the analog circui...

Page 182: ...condition If a test point TP4 reading of approximately 2 3 Vdc is unattainable through adjustment of C24 then the coarse frequency jumpers JU2 JU4 require modification in order to pull the VCO tune range within the adjustment range of fine tuning capacitor C24 The top synthesizer cover must be removed in order to gain access to the coarse frequency jumpers The coarse frequency jumpers JU2 JU4 may ...

Page 183: ...lity of all synthesizer models is listed in the Specifications section of this manual 3 5 5 3 VHF OS R T 3H 128 174 MHz VCO Alignment Refer to the OS R T 3H 128 174 MHz Analog Board Component Layout diagram and the OS R T 3H 128 174 MHz Analog Board Schematic Diagram on pages 4 9 4 10 and 4 11 of this manual Using a high impedance 10 MΩ DC Voltmeter measure the PLL control voltage at TP4 located o...

Page 184: ...nd the OST 3H460 measured PLL control voltages below approximately 1 0 Vdc and above approximately 7 0 Vdc will indicate an out of lock condition It is important to check the loop control voltage at TP4 when multiple synthesizer channels have been programmed All channel selections should result in a TP4 voltage within the 0 5 to 4 5 Vdc range for the OST 3H418 The TP4 voltage for the OSR 3H440 and...

Page 185: ...log Board This mode is used in applications requiring better than 1 ppm frequency stability An external reference signal must be provided at synthesizer SMB connector J1 3 Reference Frequency Select Install jumper JU2 on the Digital Board to select a 10 0 MHz reference frequency When not installed the reference frequency is by default 9 6 MHz JU2 must not be installed when using the internal 9 6 M...

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Page 187: ...5 SEL L1 10µH C38 1 0µF R36 R32 R33 15K 680R 2K7 LED1 TITLE OS 3H050 ANALOG BOARD THROUGH HOLE BOTTOM DESIGNATION C48 SEL C49 22nF R2 330R L12 4 7µH DESIG TX 29 40 MHz OST 3H035 C48 TX 39 50 MHz OST 3H045 RX 50 4 71 4 MHz OSR 3H061 TRANSMITTER RECEIVER 260 nH L5 68 nF 197 nH 68 nF 138 nH Not Installed DE DANIELS ELECTRONICS Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 470 MHz 4 1 ...

Page 188: ... U11 MSA 0611 U16 MSA 0611 MSA 0611 U15 SEL L13 SEL L11 C57 SEL 274R R55 274R R56 18R2 R54 SEL C58 SEL C52 330pF C53 C46 330pF 330pF C51 10nF 27R4 R45 10nF C43 47R5 R44 47R5 R46 33R2 D4 BYD17J 47pF C62 JU2 JU3 JU4 22pF C63 12pF C64 SEL C61 33pF C40 49R9 R38 C41 1nF SEL C59 10nF R22 DESIG TX 29 40 MHz OST 3H035 C23 150 pF 15 pF C53 56 pF C57 150 pF C34 C61 TX 39 50 MHz OST 3H045 RX 50 4 71 4 MHz OS...

Page 189: ...VA 5VA R31 49R9 AGND C32 100uF AGND R30 10R0 C36 330pF AGND IN OUT GND 1 3 4 2 U11 MSA 0611 R40 180R L8 1 5uH C42 22uF AGND C43 10nF AGND 8VA C44 330pF R41 18R2 R44 47R5 R47 47R5 R46 33R2 AGND C46 330pF AGND IN OUT GND 1 3 4 2 U15 MSA 0611 R50 180R L9 1 5uH C50 22uF AGND C51 10nF AGND 8VA C52 330pF R45 27R4 C47 330pF AGND IN OUT GND 1 3 4 2 U16 MSA 0611 R51 220R L10 1 5uH C54 22uF AGND C55 10nF AG...

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Page 191: ...SEL LED1 AM TX 118 138 MHz OS 3A128 AM RX 139 4 159 4 MHz OS 3A149 DESIG C39 C45 C49 R32 R36 SELECT COMPONENTS NOT INSTALLED 22 nF 2 2 nF 1 0 µF 330 nF 470 nF 15K 68K 1K8 8K2 C38 100 nF 1 0 µF C37 470 nF 1 0 µF Q5 J211 L13 1 5uH C63 680nF DWG No TBA TITLE OS 3A130 ANALOG BOARD BOTTOM THROUGH HOLE DESIGNATIONS Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 470 MHz 4 5 4 2 OS R T 3A 1...

Page 192: ...R45 10nF R44 1k82 R46 475R D4 BYD17J D6 SEL 4 7µF C61 10nF C62 274K R57 4k75 R62 C60 2 2µF U17 LTC1275I U19 MC33172 U18 PIC12C672 SEL R60 R58 825K R59 10K0 R63 10R0 137k R43 R37 49k9 100µF C32 100µF C33 D7 SEL 1nF C1 1nF C17 100nF C48 10nF C14 U20 74HC14 100nF C10 137k R22 10k R11 100nF R38 49k9 JU2 20K0 R61 1nF C24 Q6 MMBR901 C43 Factory Installed Jumpers DWG No OS3AxxxxxS1A TITLE OS 3A130 ANALOG...

Page 193: ...F AGND AGND AGND 0 1 J2 AGND 2 1 3 D2 MMBV609L 2 1 3 D1 MMBV609L L4 1 5uH R20 10R0 AGND R25 10R0 C25 SEL AGND C23 SEL L2 10uH AGND C2 1 0nF P2 OUTPUT SENSE 5VTAP FB INPUT ERROR SHDN GND 1 2 6 7 4 3 5 8 U7 LP2951 AGND C13 4 7uF AGND L3 10uH AGND C3 1 0nF P3 E B C Q2 BC817 J1 R7 10K0 R6 1K00 R9 1K00 AGND AGND C4 10nF C9 10nF AGND R1 49R9 AGND R5 100R C8 100nF AGND 5VA AGND AGND AGND AGND AGND R13 11...

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Page 195: ... C39 SEL L1 10µH R2 330R C38 SEL C49 SEL R36 R32 R33 SEL 680R SEL LED1 TITLE OS 3H ANALOG BOARD THROUGH HOLE BOTTOM DESIGNATION L9 VHF LOW BAND 128 153 MHz OSx 3H141 VHF HIGH BAND 150 174 MHz OSx 3H162 DESIG C39 22 nF C45 33 nF NOT INSTALLED C49 220 nF 15K 12K R32 6K2 2K2 R36 SELECT COMPONENTS C38 1 0 µF 470 nF 1 0 µF 470 nF Q5 J211 L5 Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 ...

Page 196: ...330pF C47 330pF R41 18R2 R47 47R5 R48 47R5 R49 10R0 C44 C55 10nF R52 N I C56 330pF R28 N I U11 MSA 0611 U16 MSA 0611 MSA 0611 MSA 0611 U15 47nH L12 47nH L11 27pF C59 27pF 274R R55 274R R56 18R2 R54 47pF C58 27pF C52 330pF C53 C46 330pF 330pF C51 10nF 27R4 R45 10nF C43 47R5 R44 47R5 R46 33R2 D4 BYD17J DWG No OS3HANA150AS2B SEL TITLE OS 3H ANALOG BOARD THROUGH HOLE LAYOUT DWG No OS3HANA150AT1 U2 OPL...

Page 197: ... Q5 SEL C35 49R9 R31 AGND 11K8 R27 1 4 3 2 L5 AGND 6 8uF C28 10nF C34 AGND 1 3 2 D3 MMBD701L 1 5uH L7 100uF C32 AGND 10R0 R30 330pF C36 C24 1 14pF AGND 8VA AGND IN OUT GND 1 3 4 2 MSA 0611 U11 180R R40 1 5uH L8 22uF C42 AGND 10nF C43 AGND 8VA 330pF C44 18R2 R41 47R5 R44 47R5 R47 33R2 R46 AGND 330pF C46 AGND IN OUT GND 1 3 4 2 MSA 0611 U15 180R R50 1 5uH L9 22uF C50 AGND 10nF C51 AGND 8VA 330pF C52...

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Page 199: ... DESIGNATION U17 VCO 1 VCO INSTALLED U17 LVCO 2309 TEV VCO 190 435 MT RX 427 4 451 4 MHz TX 406 470 MHz R21 SEL C16 100nF DESIGNATION OSR 3H440 RX 427 4 451 4 MHz LVCO 2309 TEV OST 3H4xx TX 406 470 MHz VCO 190 435 MT C37 C38 C39 C45 C49 C60 R21 R32 R36 1 0 µF 1 0 µF 1 0 µF 470 nF 33 nF Not Installed Not Installed 4k7 1k5 1 5 µF 1 5 µF 1 5 µF 68 nF 15 nF 0 Ω Wire Jumper 2k7 6k2 1k2 DE DANIELS ELECT...

Page 200: ...R52 SEL C56 330pF R28 SEL U11 MSA 0611 U16 MSA 0611 MSA 0611 U15 18nH L12 18nH L11 C59 10pF 274R R55 274R R56 18R2 R54 15pF C58 10pF C52 330pF C53 C46 330pF C51 10nF 27R4 R45 10nF C43 47R5 R44 47R5 R46 33R2 D4 BYD17J R57 18R2 R58 274R MSA 0611 Factory Installed Jumpers DWG No OS3HANA440AS2 INDICATES JUMPERED TO 5VA DESIG R28 R29 U10 Not Installed 3k92 MC145202F or MC145193F OST 3H418 TX 406 430 MH...

Page 201: ...10nF C7 10nF C14 AGND 2 1 3 JU1 10nF C19 5VA Z2 AGND 10nF C22 AGND 10nF C21 10R0 R23 10R0 R24 4 7uF C27 AGND 4 7uF C20 AGND 5VA 5VA 100pF C35 AGND AGND 10nF C34 AGND 1 5uH L7 100uF C32 AGND 10R0 R30 330pF C36 AGND 8VA AGND IN OUT GND 1 3 4 2 MSA 0611 U11 180R R40 1 5uH L8 22uF C42 AGND 10nF C43 AGND 8VA 330pF C44 18R2 R41 47R5 R44 47R5 R47 33R2 R46 AGND 330pF C46 AGND IN OUT GND 1 3 4 2 MSA 0611 U...

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Page 203: ...27k4 D3 BAS16 DWG No OS3HDIGAS4B TITLE OS 3H DIGITAL BOARD SOLDER SIDE SM VALUE DESIGNATION JU2 REV DATE 14 SEPTERMBER 1998 C15 10uF JU1 U9 OPL550 U8 OP140A U7 OP140A U6 OP140A U5 OP140A P1 1ROW x 12P 1ROW x 9P P2 1ROW x 6P 4 5 OS R T 3 A H Digital Board Diagrams 4 5 1 OS R T 3 A H Digital Board Component Layout Bottom DE DANIELS ELECTRONICS 4 17 Enhanced AM FM Synthesizer Instruction Manual OS R ...

Page 204: ...7k4 R15 27k4 R16 27k4 R27 27k4 R26 10k0 R 17 27k4 R 33 332R R 32 215R R 31 215R C10 100nF C11 100nF C12 100nF C13 100nF C14 100nF R 30 215R R 23 10k0 R 3 27k4 R 2 27k4 C1 100nF C2 100nF Q11 BC817 Q8 BC817 Q7 BC817 Q6 BC817 Q5 BC817 Q4 BC817 Q3 BC817 Q1 BC817 Q10 BC817 D1 BAS16 D2 BAS16 D4 BAS16 R40 27k4 DWG No OS3HDIGAS2B TITLE OS 3H DIGITAL BOARD COMPONENT SIDE SM VALUE DESIGNATION R41 221k REV D...

Page 205: ...5 PE4 PE3 PE2 PE1 PE0 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 VRL 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 17 18 19 25 24 23 22 21 20 26 34 33 32 31 30 29 28 27 42 41 40 39 38 37 36 35 43 45 47 49 44 46 48 50 51 52 68HC811E2 U4 D1 D1 D2 D2 S1 G1 S2 G2 1 2 3 4 5 6 7 8 SI9933DY U1 P1 12 P1 19 P1 11 P1 5 P1 13 P1 6 P1 14 P1 15 P1 8 P1 16 R14 27K4 R16 27K4 27K4 R17 DGND DGND DGND...

Page 206: ...DEDANIELS ELECTRONICS 4 20 Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 470 MHz This Page Intentionally Left Blank ...

Page 207: ...7R 50V 1008 4A103K5R C23 CAP SM 150pF CER 0805 C0G 1008 2A151J1G OST 3H035 C23 CAP SM 100pF CER 0805 C0G 1008 2A101J1G OST 3H045 C23 CAP SM 56pF CER 0805 C0G 1008 1A560J1G OSR 3H061 C24 CAP 1 14pF TRIM STAND 6 1082 A1R0014J C25 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C26 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C27 CAP SM 4 7uF TANT 10 16V 1055 5B475K16 C28 CAP SM 1 0nF CER 0805 X7R 50V 100...

Page 208: ... SM 100pF CER 0805 C0G 1008 2A101J1G OSR 3H061 C61 CAP SM 150pF CER 0805 C0G 1008 2A151J1G OST 3H035 C61 CAP SM 100pF CER 0805 C0G 1008 2A101J1G OST 3H045 C61 CAP SM 56pF CER 0805 C0G 1008 1A560J1G OSR 3H061 C62 CAP SM 47pF CER 0805 C0G 1008 1A470J1G C63 CAP SM 22pF CER 0805 C0G 1008 1A220J1G C64 CAP SM 12pF CER 0805 C0G 1008 1A120J1G D1 D2 DIODE MMBV609L VARICAP SOT 23 2106 MMBV609L D3 DIODE MMBD...

Page 209: ...RES SM 10R0 0805 1 100ppm 1150 1A10R0FP R26 RES 1R2 METAL FILM 5 0 5W 1101 0A01R2JI R27 RES SM 15K0 0805 1 100ppm 1150 4A1502FP R28 RES NOT INSTALLED NOT INSTALLED R29 RES SM 18K2 0805 1 100ppm 1150 4A1822FP R30 RES SM 10R0 0805 1 100ppm 1150 1A10R0FP R31 RES SM 49R9 0805 1 100ppm 1150 1A49R9FP R32 RES 15K METAL FILM 5 0 5W 1101 4A0153JP R33 RES 680R METAL FILM 5 0 5W 1101 2A0681JP R34 R35 RES 10K...

Page 210: ...L18230T U5 LED OP140A I R GaAs 81 x 23 PLAST 2013 1G18230A U6 I C LT1129 IS8 PROG VOLT REG SO8 2305 11290N08 U7 U8 I C LP2951 PROG VOLT REG SO 8 2305 29510N08 U9 MOSFET SI9945DY N CHAN SO 8 2142 SI9945DY U10 I C MC145191 PLL FREQ SYNTH SO 20 2355 45191N20 U11 I C MSA 0611 MM1C AMP SOT 143 2354 MSA06110 U15 U16 I C MSA 0611 MM1C AMP SOT 143 2354 MSA06110 ...

Page 211: ...5 CAP NOT INSTALLED NOT INSTALLED C26 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C27 CAP SM 4 7uF TANT 10 16V 1055 5B475K16 C28 CAP SM 6 8uF TANT 20 10V 1055 5B685M10 C29 CAP SM 47uF TANT 20 16V 1055 6D476M16 C30 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C31 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C32 C33 CAP SM 100uF TANT 20 16V 1055 7D107M16 C34 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C...

Page 212: ...MOULD 10uH 10 25 1251 4A00100K L4 CHOKE RF MOULD 3 9uH 10 25 1251 3A003R9K L5 BOBBIN 5 5 TURNS 1 59 mm pitch 5791 A1010300 WIRE COPPER 20AWG SILVER PLD 10 2cm 7140 30002000 1pc 10cm 2pcs 10mm L6 L8 CHOKE RF MOULD 1 5uH 10 25 1251 3A001R5K L11 L12 INDUCTOR SM 47nH CER 10 1008 1256 1B47N00K L13 CHOKE RF MOULD 1 5uH 10 25 1251 3A001R5K LED1 LED SUB MIN 2mm SQ AXIAL ORG 2012 S229013C PCB PCB ANALOG OS...

Page 213: ...100ppm 1150 5A1003FP R43 RES SM 137K0 0805 1 100ppm 1150 5A1373FP R44 RES SM 1K82 0805 1 100ppm 1150 3A1821FP R45 RES SM 18R2 0805 1 100ppm 1150 1A18R2FP R46 RES SM 475R0 0805 1 100ppm 1150 2A4750FP R53 RES SM 100K 0805 1 100ppm 1150 5A1003FP R57 RES SM 274K 0805 1 100ppm 1150 5A2743FP R58 RES SM 825K0 1206 1 100ppm 1150 5B8253FP R59 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R60 RES SM 68K1 0805 1 1...

Page 214: ...AN 6T 1082 A1R0014J C25 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R OS 3H141 C25 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R OS 3H162 C26 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C27 CAP SM 4 7µF TANT 10 16V 1055 5B475K16 C28 CAP SM 6 8µF TANT 20 10V 1055 5B685M10 C29 CAP SM 47µF TANT 20 16V 1055 6D476M16 C30 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C31 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A10...

Page 215: ...9cm 2pcs 1cm L6 L10 CHOKE RF MOULD 1 5uH 10 25 1251 3A001R5K L11 L12 INDUCTOR SM 47nH CER 10 1008 1256 1B47N00K L12 INDUCTOR SM 47nH CER 10 1008 1256 1B47N00K LED1 LED SUB MIN 2mm SQ AXIAL ORG 2012 S229013C PCB PCB ANALOG OS 3H H P SYNTH 4309 26500252 Q1 Q2 TRANSISTOR BC817 25 NPN SOT23 2120 BC817025 Q3 TRANSISTOR BC807 PNP SOT23 2120 BC807025 Q4 TRANSISTOR BC817 NPN SOT23 2120 BC817025 Q5 JFET J2...

Page 216: ...805 1 100ppm 1150 1A18R2FP R44 RES SM 47R5 0805 1 100ppm 1150 1A47R5FP R45 RES SM 27R4 0805 1 100ppm 1150 1A27R4FP R46 RES SM 33R2 0805 1 100ppm 1150 1A33R2FP R47 R48 RES SM 47R5 0805 1 100ppm 1150 1A47R5FP R49 RES SM 10R0 0805 1 100ppm 1150 1A10R0FP R50 RES 180R METAL FILM 5 0 5W 1101 2A0181JP R51 RES NOT INSTALLED NOT INSTALLED R52 RES SM 49R9 0805 1 100ppm 1150 1A49R9FP R53 RES SM 10K0 0805 1 1...

Page 217: ...6M16 C30 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C31 CAP SM 1 0nF CER 0805 X7R 50V 1008 3A102K5R C32 C33 CAP SM 100uF TANT 20 16V 1055 7D107M16 C34 CAP SM 10nF CER 0805 X7R 50V 1008 4A103K5R C35 CAP SM 100pF CER 0805 COG 1008 2A101J1G C36 CAP SM 330pF CER 0805 COG 1008 2A331J1G C37 CAP 1 0uF FILM MMK5 10 50V 1016 6D105K50 C38 CAP NOT INSTALLED NOT INSTALLED OST 3H4xx C38 CAP 1 0uF FILM MMK5 10 ...

Page 218: ...00ppm 1150 4A1002FP R13 RES SM 11K8 0805 1 100ppm 1150 4A1182FP R14 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R15 RES SM 10R0 0805 1 100ppm 1150 1A10R0FP R16 R17 RES SM 5K11 0805 1 100ppm 1150 3A5111FP R18 R19 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R21 RES 2K7 METAL FILM 5 0 5W 1101 3A0272JP OST 3H4xx R21 RES NOT INSTALLED NOT INSTALLED OSR 3H440 R23 RES SM 10R0 0805 1 100ppm 1150 1A10R0FP R24 R25 ...

Page 219: ...pm 1150 1A49R9FP OSR 3H440 R52 RES SM 49R9 0805 1 100ppm 1150 1A49R9FP OST 3H460 R53 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R54 RES SM 18R2 0805 1 100ppm 1150 1A18R2FP R55 R56 RES SM 274R 0805 1 100ppm 1150 2A2740FP R57 RES SM 18R2 0805 1 100ppm 1150 1A18R2FP R58 RES SM 274R 0805 1 100ppm 1150 2A2740FP RV1 POT SM5K0 1T TOP ADJ 1174 AS2502J1 TCXO1 VTCXO MODULE 9 6 MHz 4 PIN 1ppm 2641 09600BM5 U1 U...

Page 220: ...TRANSISTOR BC817 25 NPN SOT23 2120 BC817025 R1 RES SM 0 0805 ZERO OHM JUMPER 1150 0A0R0000 R2 R7 RES SM 47K5 0805 1 100ppm 1150 4A4752FP R8 RES SM 6K81 0805 1 100ppm 1150 3A6811FP R9 R10 RES SM 47K5 0805 1 100ppm 1150 4A4752FP R11 RES SM 10M0 1206 5 400ppm 1151 7B0106JG R12 R22 RES SM 47K5 0805 1 100ppm 1150 4A4752FP R23 R26 RES SM 10K0 0805 1 100ppm 1150 4A1002FP R27 R29 RES SM 47K5 0805 1 100ppm...

Page 221: ...5mm OD CON3 CON5 1210 43030350 3 OS 3A130 FERRITE BEAD 43 MIX 3X3 5mm OD CON3 CON5 1210 43030350 3 OS 3H150 FERRITE BEAD 61 MIX 3X3 5mm OD CON3 CON5 1210 61030350 3 OS 3H440 HEADER 1 1 ROWX3PIN AU 5010 H103ST7L 2 LABEL FOIL FRQ SN OS 3H SYNTH 3501 13091006 1 LID CASE OS 3H SYNTH MODL AL 3702 66100921 1 PIN 2 x 10mm GROOVED W PILOT 5876 D1470210 4 SCREW M2 0 x 4 FLAT PHIL A2 5812 2M0FP04S 8 SCREW M...

Page 222: ...5 16 Enhanced AM FM Synthesizer Instruction Manual OS R T 3 A H 29 470 MHz This Page Intentionally Left Blank ...

Page 223: ...nt tantalums Changes to the OS 3A H Digital board for compatibility with the new AM wideband Synthesizers ECO 579 Added C15 10µF and R41 221kΩ JU1 was added and is installed for AM modules only PCB DIGITAL OS 3H P SYNTH was version 2 now version 3 Added the new component layouts schematic diagram and parts lists for the new AM wideband synthesizer Wideband referring to only having to be tune once ...

Page 224: ...H 29 470 MHz ISSUE DATE REVISION 4 Aug 00 Changes to the OS R T 3 A H Digital board ECO 599 R30 R31 R32 were 332R are now 215R Changes to the OS 3H 406 470 MHz Analog board ECO 597 R48 was 27R4 is now 47R5 R49 was 33R2 is now 10R R52 was 49R9 is now Not Installed ...

Page 225: ...ls Electronics Ltd All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of Daniels Electronics Ltd Issue 1 Previous Issue N A Issue Date May 1998 Previous Issue Date N A Daniels Electronics Ltd Printing Date January 2001 Vi...

Page 226: ... this equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd The design of this equipment is subject to change due to continuous development This equipment may incorporate minor changes in detail from the information contained in this manual ...

Page 227: ... 140 Channel Designation Table 132 150MHz 5kHz Increments 1 1 2 VT 3 140 Channel Designation Table 132 150MHz 6 25kHz Increments 2 1 3 VT 3 160 Channel Designation Table 150 174MHz 5kHz Increments 3 1 4 VT 3 160 Channel Designation Table 150 174MHz 6 25kHz Increments 4 1 5 REVISION HISTORY 5 1 ...

Page 228: ...iv VHF Transmitter Channel Designation Tables VT 3 132 174 MHz This Page Intentionally Left Blank ...

Page 229: ...059 29500 1134 67000 1209 04500 1284 42000 835 17500 910 55000 985 92500 1060 30000 1135 67500 1210 05000 1285 42500 836 18000 911 55500 986 93000 1061 30500 1136 68000 1211 05500 1286 43000 837 18500 912 56000 987 93500 1062 31000 1137 68500 1212 06000 1287 43500 838 19000 913 56500 988 94000 1063 31500 1138 69000 1213 06500 1288 44000 839 19500 914 57000 989 94500 1064 32000 1139 69500 1214 0700...

Page 230: ...00 1509 54500 1584 92000 1659 29500 1734 67000 1809 04500 1360 80000 1435 17500 1510 55000 1585 92500 1660 30000 1735 67500 1810 05000 1361 80500 1436 18000 1511 55500 1586 93000 1661 30500 1736 68000 1811 05500 1362 81000 1437 18500 1512 56000 1587 93500 1662 31000 1737 68500 1812 06000 1363 81500 1438 19000 1513 56500 1588 94000 1663 31500 1738 69000 1813 06500 1364 82000 1439 19500 1514 57000 1...

Page 231: ...034 17000 2109 54500 2184 92000 2259 29500 2334 67000 1885 42500 1960 80000 2035 17500 2110 55000 2185 92500 2260 30000 2335 67500 1886 43000 1961 80500 2036 18000 2111 55500 2186 93000 2261 30500 2336 68000 1887 43500 1962 81000 2037 18500 2112 56000 2187 93500 2262 31000 2337 68500 1888 44000 1963 81500 2038 19000 2113 56500 2188 94000 2263 31500 2338 69000 1889 44500 1964 82000 2039 19500 2114 ...

Page 232: ...00 2559 79500 2634 17000 2709 54500 2784 92000 2859 29500 2410 05000 2485 42500 2560 80000 2635 17500 2710 55000 2785 92500 2860 30000 2411 05500 2486 43000 2561 80500 2636 18000 2711 55500 2786 93000 2861 30500 2412 06000 2487 43500 2562 81000 2637 18500 2712 56000 2787 93500 2862 31000 2413 06500 2488 44000 2563 81500 2638 19000 2713 56500 2788 94000 2863 31500 2414 07000 2489 44500 2564 82000 2...

Page 233: ...084 42000 3159 79500 3234 17000 3309 54500 3384 92000 2935 67500 3010 05000 3085 42500 3160 80000 3235 17500 3310 55000 3385 92500 2936 68000 3011 05500 3086 43000 3161 80500 3236 18000 3311 55500 3386 93000 2937 68500 3012 06000 3087 43500 3162 81000 3237 18500 3312 56000 3387 93500 2938 69000 3013 06500 3088 44000 3163 81500 3238 19000 3313 56500 3388 94000 2939 69500 3014 07000 3089 44500 3164 ...

Page 234: ...00 3609 04500 3684 42000 3759 79500 3834 17000 3909 54500 3460 30000 3535 67500 3610 05000 3685 42500 3760 80000 3835 17500 3910 55000 3461 30500 3536 68000 3611 05500 3686 43000 3761 80500 3836 18000 3911 55500 3462 31000 3537 68500 3612 06000 3687 43500 3762 81000 3837 18500 3912 56000 3463 31500 3538 69000 3613 06500 3688 44000 3763 81500 3838 19000 3913 56500 3464 32000 3539 69500 3614 07000 3...

Page 235: ... 4283 41500 4358 79000 3984 92000 4059 29500 4134 67000 4209 04500 4284 42000 4359 79500 3985 92500 4060 30000 4135 67500 4210 05000 4285 42500 4360 80000 3986 93000 4061 30500 4136 68000 4211 05500 4286 43000 4361 80500 3987 93500 4062 31000 4137 68500 4212 06000 4287 43500 4362 81000 3988 94000 4063 31500 4138 69000 4213 06500 4288 44000 4363 81500 3989 94500 4064 32000 4139 69500 4214 07000 428...

Page 236: ...1 8 VHF Transmitter Channel Designation Tables VT 3 132 174 MHz This page intentionally left blank ...

Page 237: ...5000 5899 61875 5974 08750 6049 55625 6124 02500 5675 21875 5750 68750 5825 15625 5900 62500 5975 09375 6050 56250 6125 03125 5676 22500 5751 69375 5826 16250 5901 63125 5976 10000 6051 56875 6126 03750 5677 23125 5752 70000 5827 16875 5902 63750 5977 10625 6052 57500 6127 04375 5678 23750 5753 70625 5828 17500 5903 64375 5978 11250 6053 58125 6128 05000 5679 24375 5754 71250 5829 18125 5904 65000...

Page 238: ...349 43125 6424 90000 6499 36875 6574 83750 6649 30625 6200 135 50000 6275 96875 6350 43750 6425 90625 6500 37500 6575 84375 6650 31250 6201 50625 6276 97500 6351 44375 6426 91250 6501 38125 6576 85000 6651 31875 6202 51250 6277 98125 6352 45000 6427 91875 6502 38750 6577 85625 6652 32500 6203 51875 6278 98750 6353 45625 6428 92500 6503 39375 6578 86250 6653 33125 6204 52500 6279 99375 6354 46250 6...

Page 239: ...874 71250 6949 18125 7024 65000 7099 11875 7174 58750 6725 78125 6800 139 25000 6875 71875 6950 18750 7025 65625 7100 12500 7175 59375 6726 78750 6801 25625 6876 72500 6951 19375 7026 66250 7101 13125 7176 60000 6727 79375 6802 26250 6877 73125 6952 20000 7027 66875 7102 13750 7177 60625 6728 80000 6803 26875 6878 73750 6953 20625 7028 67500 7103 14375 7178 61250 6729 80625 6804 27500 6879 74375 6...

Page 240: ...399 99375 7474 46250 7549 93125 7624 40000 7699 86875 7250 06250 7325 53125 7400 143 00000 7475 46875 7550 93750 7625 40625 7700 87500 7251 06875 7326 53750 7401 00625 7476 47500 7551 94375 7626 41250 7701 88125 7252 07500 7327 54375 7402 01250 7477 48125 7552 95000 7627 41875 7702 88750 7253 08125 7328 55000 7403 01875 7478 48750 7553 95625 7628 42500 7703 89375 7254 08750 7329 55625 7404 02500 7...

Page 241: ...924 27500 7999 74375 8074 21250 8149 68125 8224 15000 7775 34375 7850 81250 7925 28125 8000 146 75000 8075 21875 8150 68750 8225 15625 7776 35000 7851 81875 7926 28750 8001 75625 8076 22500 8151 69375 8226 16250 7777 35625 7852 82500 7927 29375 8002 76250 8077 23125 8152 70000 8227 16875 7778 36250 7853 83125 7928 30000 8003 76875 8078 23750 8153 70625 8228 17500 7779 36875 7854 83750 7929 30625 8...

Page 242: ...8441 50625 8516 97500 8292 57500 8367 04375 8442 51250 8517 98125 8293 58125 8368 05000 8443 51875 8518 98750 8294 58750 8369 05625 8444 52500 8519 99375 8295 59375 8370 06250 8445 53125 8520 150 00000 8296 60000 8371 06875 8446 53750 8297 60625 8372 07500 8447 54375 8298 61250 8373 08125 8448 55000 8299 61875 8374 08750 8449 55625 8300 62500 8375 09375 8450 56250 8301 63125 8376 10000 8451 56875 ...

Page 243: ...7000 109 54500 184 92000 259 29500 334 67000 409 04500 484 42000 035 17500 110 55000 185 92500 260 30000 335 67500 410 05000 485 42500 036 18000 111 55500 186 93000 261 30500 336 68000 411 05500 486 43000 037 18500 112 56000 187 93500 262 31000 337 68500 412 06000 487 43500 038 19000 113 56500 188 94000 263 31500 338 69000 413 06500 488 44000 039 19500 114 57000 189 94500 264 32000 339 69500 414 0...

Page 244: ...634 17000 709 54500 784 92000 859 29500 934 67000 1009 04500 560 80000 635 17500 710 55000 785 92500 860 30000 935 67500 1010 05000 561 80500 636 18000 711 55500 786 93000 861 30500 936 68000 1011 05500 562 81000 637 18500 712 56000 787 93500 862 31000 937 68500 1012 06000 563 81500 638 19000 713 56500 788 94000 863 31500 938 69000 1013 06500 564 82000 639 19500 714 57000 789 94500 864 32000 939 6...

Page 245: ...234 17000 1309 54500 1384 92000 1459 29500 1534 67000 1085 42500 1160 80000 1235 17500 1310 55000 1385 92500 1460 30000 1535 67500 1086 43000 1161 80500 1236 18000 1311 55500 1386 93000 1461 30500 1536 68000 1087 43500 1162 81000 1237 18500 1312 56000 1387 93500 1462 31000 1537 68500 1088 44000 1163 81500 1238 19000 1313 56500 1388 94000 1463 31500 1538 69000 1089 44500 1164 82000 1239 19500 1314 ...

Page 246: ...00 1759 79500 1834 17000 1909 54500 1984 92000 2059 29500 1610 05000 1685 42500 1760 80000 1835 17500 1910 55000 1985 92500 2060 30000 1611 05500 1686 43000 1761 80500 1836 18000 1911 55500 1986 93000 2061 30500 1612 06000 1687 43500 1762 81000 1837 18500 1912 56000 1987 93500 2062 31000 1613 06500 1688 44000 1763 81500 1838 19000 1913 56500 1988 94000 2063 31500 1614 07000 1689 44500 1764 82000 1...

Page 247: ...284 42000 2359 79500 2434 17000 2509 54500 2584 92000 2135 67500 2210 05000 2285 42500 2360 80000 2435 17500 2510 55000 2585 92500 2136 68000 2211 05500 2286 43000 2361 80500 2436 18000 2511 55500 2586 93000 2137 68500 2212 06000 2287 43500 2362 81000 2437 18500 2512 56000 2587 93500 2138 69000 2213 06500 2288 44000 2363 81500 2438 19000 2513 56500 2588 94000 2139 69500 2214 07000 2289 44500 2364 ...

Page 248: ...00 2809 04500 2884 42000 2959 79500 3034 17000 3109 54500 2660 30000 2735 67500 2810 05000 2885 42500 2960 80000 3035 17500 3110 55000 2661 30500 2736 68000 2811 05500 2886 43000 2961 80500 3036 18000 3111 55500 2662 31000 2737 68500 2812 06000 2887 43500 2962 81000 3037 18500 3112 56000 2663 31500 2738 69000 2813 06500 2888 44000 2963 81500 3038 19000 3113 56500 2664 32000 2739 69500 2814 07000 2...

Page 249: ...334 67000 3409 04500 3484 42000 3559 79500 3634 17000 3185 92500 3260 30000 3335 67500 3410 05000 3485 42500 3560 80000 3635 17500 3186 93000 3261 30500 3336 68000 3411 05500 3486 43000 3561 80500 3636 18000 3187 93500 3262 31000 3337 68500 3412 06000 3487 43500 3562 81000 3637 18500 3188 94000 3263 31500 3338 69000 3413 06500 3488 44000 3563 81500 3638 19000 3189 94500 3264 32000 3339 69500 3414 ...

Page 250: ...00 3859 29500 3934 67000 4009 04500 4084 42000 4159 79500 3710 55000 3785 92500 3860 30000 3935 67500 4010 05000 4085 42500 4160 80000 3711 55500 3786 93000 3861 30500 3936 68000 4011 05500 4086 43000 4161 80500 3712 56000 3787 93500 3862 31000 3937 68500 4012 06000 4087 43500 4162 81000 3713 56500 3788 94000 3863 31500 3938 69000 4013 06500 4088 44000 4163 81500 3714 57000 3789 94500 3864 32000 3...

Page 251: ...384 92000 4459 29500 4534 67000 4609 04500 4684 42000 4235 17500 4310 55000 4385 92500 4460 30000 4535 67500 4610 05000 4685 42500 4236 18000 4311 55500 4386 93000 4461 30500 4536 68000 4611 05500 4686 43000 4237 18500 4312 56000 4387 93500 4462 31000 4537 68500 4612 06000 4687 43500 4238 19000 4313 56500 4388 94000 4463 31500 4538 69000 4613 06500 4688 44000 4239 19500 4314 57000 4389 94500 4464 ...

Page 252: ...70000 4741 70500 4742 71000 4743 71500 4744 72000 4745 72500 4746 73000 4747 73500 4748 74000 4749 74500 4750 173 75000 4751 75500 4752 76000 4753 76500 4754 77000 4755 77500 4756 78000 4757 78500 4758 79000 4759 79500 4760 80000 4761 80500 4762 81000 4763 81500 4764 82000 4765 82500 4766 83000 4767 83500 4768 84000 4769 84500 4770 85000 4771 85500 4772 86000 4773 86500 4774 87000 4775 87500 4776 ...

Page 253: ...5000 5259 61875 5334 08750 5409 55625 5484 02500 5035 21875 5110 68750 5185 15625 5260 62500 5335 09375 5410 56250 5485 03125 5036 22500 5111 69375 5186 16250 5261 63125 5336 10000 5411 56875 5486 03750 5037 23125 5112 70000 5187 16875 5262 63750 5337 10625 5412 57500 5487 04375 5038 23750 5113 70625 5188 17500 5263 64375 5338 11250 5413 58125 5488 05000 5039 24375 5114 71250 5189 18125 5264 65000...

Page 254: ...709 43125 5784 90000 5859 36875 5934 83750 6009 30625 5560 153 50000 5635 96875 5710 43750 5785 90625 5860 37500 5935 84375 6010 31250 5561 50625 5636 97500 5711 44375 5786 91250 5861 38125 5936 85000 6011 31875 5562 51250 5637 98125 5712 45000 5787 91875 5862 38750 5937 85625 6012 32500 5563 51875 5638 98750 5713 45625 5788 92500 5863 39375 5938 86250 6013 33125 5564 52500 5639 99375 5714 46250 5...

Page 255: ...234 71250 6309 18125 6384 65000 6459 11875 6534 58750 6085 78125 6160 157 25000 6235 71875 6310 18750 6385 65625 6460 12500 6535 59375 6086 78750 6161 25625 6236 72500 6311 19375 6386 66250 6461 13125 6536 60000 6087 79375 6162 26250 6237 73125 6312 20000 6387 66875 6462 13750 6537 60625 6088 80000 6163 26875 6238 73750 6313 20625 6388 67500 6463 14375 6538 61250 6089 80625 6164 27500 6239 74375 6...

Page 256: ...759 99375 6834 46250 6909 93125 6984 40000 7059 86875 6610 06250 6685 53125 6760 161 00000 6835 46875 6910 93750 6985 40625 7060 87500 6611 06875 6686 53750 6761 00625 6836 47500 6911 94375 6986 41250 7061 88125 6612 07500 6687 54375 6762 01250 6837 48125 6912 95000 6987 41875 7062 88750 6613 08125 6688 55000 6763 01875 6838 48750 6913 95625 6988 42500 7063 89375 6614 08750 6689 55625 6764 02500 6...

Page 257: ...284 27500 7359 74375 7434 21250 7509 68125 7584 15000 7135 34375 7210 81250 7285 28125 7360 164 75000 7435 21875 7510 68750 7585 15625 7136 35000 7211 81875 7286 28750 7361 75625 7436 22500 7511 69375 7586 16250 7137 35625 7212 82500 7287 29375 7362 76250 7437 23125 7512 70000 7587 16875 7138 36250 7213 83125 7288 30000 7363 76875 7438 23750 7513 70625 7588 17500 7139 36875 7214 83750 7289 30625 7...

Page 258: ...809 55625 7884 02500 7959 49375 8034 96250 8109 43125 7660 62500 7735 09375 7810 56250 7885 03125 7960 168 50000 8035 96875 8110 43750 7661 63125 7736 10000 7811 56875 7886 03750 7961 50625 8036 97500 8111 44375 7662 63750 7737 10625 7812 57500 7887 04375 7962 51250 8037 98125 8112 45000 7663 64375 7738 11250 7813 58125 7888 05000 7963 51875 8038 98750 8113 45625 7664 65000 7739 11875 7814 58750 7...

Page 259: ...334 83750 8409 30625 8484 77500 8559 24375 8634 71250 8185 90625 8260 37500 8335 84375 8410 31250 8485 78125 8560 172 25000 8635 71875 8186 91250 8261 38125 8336 85000 8411 31875 8486 78750 8561 25625 8636 72500 8187 91875 8262 38750 8337 85625 8412 32500 8487 79375 8562 26250 8637 73125 8188 92500 8263 39375 8338 86250 8413 33125 8488 80000 8563 26875 8638 73750 8189 93125 8264 40000 8339 86875 8...

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Page 261: ...VHF Transmitter Channel Designation Tables VT 3 132 174 MHz 5 1 5 REVISION HISTORY ISSUE DATE REVISION 1 May 98 Issue 1 ...

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