Parts List
Table Of Contents
- 1GENERAL
- 2SYSTEM OVERVIEW
- 2.1Transmitter Operation
- 2.2Frequency Selection
- 2.2.1Synthesizer Transmitter
- 2.3Transmitter Assembly and Adjustment
- 2.3.1Complete Transmitter Alignment
- 2.3.2Frequency Change
- 2.3.3Output Power Adjustment
- 2.3.4Deviation Setting
- 2.3.5Setting RF Alarm Thresholds
- 2.4Recommended Test Equipment List
- 2.5Repair Note
- 2.6Printed Circuitboard Numbering Convention
- 3ILLUSTRATIONS
- 4PARTS LIST
- 5REVISION HISTORY
- TRANSMITTER MAIN BOARD
- 1GENERAL
- 2THEORY OF OPERATION
- 2.1 Transmitter Main Board
- 2.1.1General
- 2.1.2Transmitter Push-To-Talk
- 2.1.2.1Microphone PTT
- 2.1.2.2PTT With Time-Out-Timer
- 2.1.2.3PTT No Time-Out-Timer
- 2.1.2.4Optional Relay
- 2.1.2.5PTT Output
- 2.1.2.6PTT Voltage Switching
- 2.1.2.7Transmitter Standby Modes
- 2.1.3Audio Circuits
- 2.1.3.1Microphone Audio
- 2.1.3.2Received Audio
- 2.1.4Channel Selection
- 2.1.4.1Synthesized Transmitter
- 2.1.4.2Crystal Controlled Transmitter
- 2.1.5Amplifier Circuits
- 2.1.6Time-Out-Timer Circuitry
- 2.2MT-3 Front Panel Board
- 2.3MT-3 Audio Processor (Version 1.6)
- 2.3.1General
- 2.3.2Power Requirements
- 2.3.3Audio Processor Turn-on Time
- 2.3.4Audio Processor Signals
- 2.3.4.1Audio Processor Outputs
- 2.3.4.2Audio Processor Modulation Output
- 2.3.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.3.4.4Audio Processor Inputs
- 2.3.4.5Audio Processor Microphone Input
- 2.3.4.6Audio Processor Balanced Input
- 2.3.4.7Audio Processor Auxiliary Input
- 2.3.4.8Audio Processor Subtone Inputs
- 2.3.4.9Audio Processor Direct Modulation Input
- 2.4MT-3 Audio Processor (Version 1.8)
- 2.4.1General
- 2.4.2Power Requirements
- 2.4.3Audio Processor Turn-on Time
- 2.4.4Audio Processor Signals
- 2.4.4.1Audio Processor Outputs
- 2.4.4.2Audio Processor Modulation Output
- 2.4.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.4.4.4Audio Processor Inputs
- 2.4.4.5Audio Processor Microphone Input
- 2.4.4.6Audio Processor Balanced Input
- 2.4.4.7Audio Processor Auxiliary Input
- 2.4.4.8Audio Processor Subtone Inputs
- 2.4.4.9Audio Processor Direct Modulation Input
- 2.5Low Frequency Modulation
- 3TRANSMITTER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Printed Circuitboard Numbering Convention
- 3.4Recommended Test Equipment List
- 3.5Standard Factory Settings and Jumper Configuration
- 3.5.1MT-3 Transmitter Board Factory Configuration
- 3.5.2MT-3 Audio Processor Factory Configuration (Version 1.6)
- 3.6MT-3 Transmitter Board Alignment
- 3.6.1General
- 3.6.2MT-3 Transmitter Board Test Points
- 3.7Module Installation and Removal
- 3.8MT-3 Audio Processor Alignment (Version 1.6)
- 3.8.1General
- 3.8.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.9Standard Factory Settings and Jumper Configuration
- 3.9.1MT-3 Audio Processor Factory Configuration (Version 1.8)
- 3.10MT-3 Audio Processor Alignment (Version 1.8)
- 3.10.1General
- 3.10.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.11Low Frequency Modulation Configuration
- 3.11.1MT-3 Transmitters
- 3.11.2MT-3 Transmitter Audio Processors
- 3.11.3Synthesizer and Crystal Controlled Oscillator
- 3.11.4Tuning the Transmitter
- 4TRANSMITTER INTERCONNECT PIN DEFINITIONS
- 5ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5.1Transmitter Block Diagram
- 5.2Transmitter Main Board Electrical Assembly
- 5.2.1Transmitter Main Board Top Side Component Layout
- 5.2.2Transmitter Main Board Bottom Side Component Layout
- 5.2.3Transmitter Main Board Schematic Diagram
- 5.3Front Panel Board
- 5.3.1Front Panel Board Component Layout
- 5.3.2Front Panel Board Schematic
- 5.4Audio Processor Electrical Assembly (Version 1.6)
- 5.4.1Audio Processor Component Layout
- 5.4.2Audio Processor Schematic Diagram
- 5.5Audio Processor Electrical Assembly (Version 1.8)
- 5.5.1Audio Processor Component Layout
- 5.5.2Audio Processor Schematic Diagram
- 6PARTS LISTS
- 6.1Transmitter Main Board Parts List
- 6.1.1Transmitter Main Board Electrical Parts List
- 6.1.2Transmitter Main Board Mechanical Parts List
- 6.1.3MT-3 Front Panel Board Electrical Parts List
- 6.2MT-3 Audio Processor Parts List (Version 1.6)
- 6.2.1MT-3 Audio Processor Electrical Parts List (Version 1.6)
- 6.3MT-3 Audio Processor Parts List (Version 1.8)
- 6.3.1MT-3 Audio Processor Electrical Parts List (Version 1.8)
- 7REVISION HISTORY
- AUDIO PROCESSOR
- 1 FM AUDIO PROCESSOR
- 2 SIGNALS
- 3 THEORY OF OPERATION
- 4 ALIGNMENT
- 5 TROUBLESHOOTING - TEST EQUIPMENT NEEDED
- 6 TEMPERATURE COMPENSATION
- 7 ILLUSTRATIONS, TABLES AND SCHEMATIC DIAGRAMS
- 8 FM AUDIO PROCESSOR PARTS LIST
- 9 AM AUDIO PROCESSOR
- 9.1 Introduction
- 9.2 Performance Specifications
- 9.3 Audio Specifications
- 9.4 Audio Circuits
- 9.5 Power Requirements
- 9.6 Transmitter Standby Modes
- 9.7 Audio Circuitry
- 9.8 AM Audio Processor Factory Configuration
- 9.9 AM Audio Processor Alignment
- 9.10 AM Audio Processor Electrical Parts List
- 9.11 AM Audio Processor Component Layout
- 9.12 AM Audio Processor Schematic Diagram
- 10 REVISION HISTORY
- VHF AMPLIFIER
- 1GENERAL
- 2THEORY OF OPERATION
- 3VT-3/150 AMPLIFIER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Recommended Test Equipment List
- 3.4Printed Circuitboard Numbering Convention
- 3.5Standard Factory Settings and Jumper Configuration
- 3.6VT-3/150 Amplifier Alignment
- 3.6.1General
- 3.6.2VT-3/150 Amplifier Adjustment
- 3.6.2.1General Set-Up
- 3.6.2.2Output Power Alarm (Forward Power)
- 3.6.2.3Output Power
- 3.6.2.4Antenna VSWR Alarm (Reverse Power)
- 3.6.2.5Antenna VSWR Overload
- 3.6.2.6Procedure Verification
- 4ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5PARTS LISTS
- 6REVISION HISTORY
- ENHANCED AM/FM SYNTHESIZER
- 1. GENERAL
- 2. THEORY OF OPERATION
- 2.1 Internal Power and Control (Digital Board)
- 2.2 Synthesizer Analog Circuitry (Analog Board)
- 2.2.1 Common Analog Board Circuitry
- 2.2.2 29 - 71.4 MHz Analog Board Circuitry
- 2.2.3 118 - 159.4 MHz Multichannel AM Analog Board Circuitry
- 2.2.4 128 - 174 MHz Analog Board Circuitry
- 2.2.5 406 - 470 MHz Analog Board Circuitry
- 2.3 Synthesizer Digital Circuitry (Digital Board)
- 2.4 Frequency Control
- 2.4.1 BCD Switch Frequency Control
- 2.4.2 Frequency Select Handle Frequency Control
- 2.5 Synthesizer Base and Frequency Increment Table
- 2.6 5.0/6.25 kHz Channelization.
- 2.7 8.333 kHz Channelization.
- 2.8 12.5 kHz Channelization.
- 3. SYNTHESIZER ALIGNMENT
- 3.1 General
- 3.2 Repair Note
- 3.3 Recommended Test Equipment
- 3.4 OS(R/T)-3(A/H) Synthesizer Factory Configuration
- 3.5 OS(R/T)-3(A/H) Synthesizer Alignment
- 3.5.1 General
- 3.5.2 Synthesizer Test Points
- 3.5.3 Synthesizer Removal and Installation
- 3.5.4 Circuit Board Removal
- 3.5.5 Frequency Adjustment and Channel Selection
- 3.5.5.1 VHF OS(R/T)-3H 29 - 71.4 MHz VCO Alignment
- 3.5.5.2 VHF OS(R/T)-3A 118 - 159.4 MHz Alignment
- 3.5.5.3 VHF OS(R/T)-3H 128 - 174 MHz VCO Alignment
- 3.5.5.4 UHF OS(R/T)-3H 406 - 470 MHz VCO Alignment
- 3.5.5.5 Reference Frequency Alignment
- 3.5.6 Jumper Configuration
- 4. ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 4.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Diagrams
- 4.1.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Bottom)
- 4.1.2 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Top)
- 4.1.3 OS(R/T)-3H 29 - 71.4 MHz Analog Board Schematic Diagram
- 4.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Diagrams
- 4.2.1 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Bottom)
- 4.2.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Top)
- 4.2.3 OS(R/T)-3A 118 - 159.4 MHz Analog Board Schematic Diagram
- 4.3 OS(R/T)-3H 128 - 174 MHz Analog Board Diagrams
- 4.3.1 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Bottom)
- 4.3.2 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Top)
- 4.3.3 OS(R/T)-3H 128 - 174 MHz Analog Board Schematic Diagram
- 4.4 OS(R/T)-3H 406 - 470 MHz Analog Board Diagrams
- 4.4.1 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Bottom)
- 4.4.2 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Top)
- 4.4.3 OS(R/T)-3H 406 - 470 MHz Analog Board Schematic Diagram
- 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)
- 4.5.2 OS(R/T)-3(A/H) Digital Board Component Layout (Top)
- 4.5.3 OS(R/T)-3(A/H) Digital Board Schematic Diagram
- 5. PARTS LISTS
- 5.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Electrical Parts List
- 5.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Electrical Parts List
- 5.3 OS(R/T)-3H 128 - 174 MHz Analog Board Electrical Parts List
- 5.4 OS(R/T)-3H 406 - 470 MHz Analog Board Electrical Parts List
- 5.5 OS(R/T)-3(A/H) Digital Board Electrical Parts List
- 5.6 OS(R/T)-3(A/H) Synthesizer Mechanical Parts List
- 6. REVISION HISTORY
- VHF CHANNEL DESIGNATION TABLES
VHF Transmitter Channel Designation Tables VT-3 132 - 174 MHz
3-7
VT-3/160
Channe
l
Designation
Table:
150
to
174
MHz,
5
kHz
Increments
(continued)
Chan.
Freq.
Chan.
Freq.
Chan.
Freq.
Chan.
Freq.
Chan.
Freq.
Chan.
Freq.
Chan.
Freq.
Num.
(MHz)
Num.
(MHz)
Num.
(MHz)
Num.
(MHz)
Num.
(MHz)
Num.
(MHz)
Num.
(MHz)
3150 165.75000 3225 166.12500 3300 166.50000 3375 166.87500 3450 167.25000 3525 167.62500 3600 168.00000
3151 .75500 3226 .13000 3301 .50500 3376 .88000 3451 .25500 3526 .63000 3601 .00500
3152 .76000 3227 .13500 3302 .51000 3377 .88500 3452 .26000 3527 .63500 3602 .01000
3153 .76500 3228 .14000 3303 .51500 3378 .89000 3453 .26500 3528 .64000 3603 .01500
3154 .77000 3229 .14500 3304 .52000 3379 .89500 3454 .27000 3529 .64500 3604 .02000
3155 .77500 3230 .15000 3305 .52500 3380 .90000 3455 .27500 3530 .65000 3605 .02500
3156 .78000 3231 .15500 3306 .53000 3381 .90500 3456 .28000 3531 .65500 3606 .03000
3157 .78500 3232 .16000 3307 .53500 3382 .91000 3457 .28500 3532 .66000 3607 .03500
3158 .79000 3233 .16500 3308 .54000 3383 .91500 3458 .29000 3533 .66500 3608 .04000
3159 .79500 3234 .17000 3309 .54500 3384 .92000 3459 .29500 3534 .67000 3609 .04500
3160 .80000 3235 .17500 3310 .55000 3385 .92500 3460 .30000 3535 .67500 3610 .05000
3161 .80500 3236 .18000 3311 .55500 3386 .93000 3461 .30500 3536 .68000 3611 .05500
3162 .81000 3237 .18500 3312 .56000 3387 .93500 3462 .31000 3537 .68500 3612 .06000
3163 .81500 3238 .19000 3313 .56500 3388 .94000 3463 .31500 3538 .69000 3613 .06500
3164 .82000 3239 .19500 3314 .57000 3389 .94500 3464 .32000 3539 .69500 3614 .07000
3165 .82500 3240 .20000 3315 .57500 3390 .95000 3465 .32500 3540 .70000 3615 .07500
3166 .83000 3241 .20500 3316 .58000 3391 .95500 3466 .33000 3541 .70500 3616 .08000
3167 .83500 3242 .21000 3317 .58500 3392 .96000 3467 .33500 3542 .71000 3617 .08500
3168 .84000 3243 .21500 3318 .59000 3393 .96500 3468 .34000 3543 .71500 3618 .09000
3169 .84500 3244 .22000 3319 .59500 3394 .97000 3469 .34500 3544 .72000 3619 .09500
3170 .85000 3245 .22500 3320 .60000 3395 .97500 3470 .35000 3545 .72500 3620 .10000
3171 .85500 3246 .23000 3321 .60500 3396 .98000 3471 .35500 3546 .73000 3621 .10500
3172 .86000 3247 .23500 3322 .61000 3397 .98500 3472 .36000 3547 .73500 3622 .11000
3173 .86500 3248 .24000 3323 .61500 3398 .99000 3473 .36500 3548 .74000 3623 .11500
3174 .87000 3249 .24500 3324 .62000 3399 .99500 3474 .37000 3549 .74500 3624 .12000
3175 .87500 3250 166.25000 3325 .62500 3400 167.00000 3475 .37500 3550 167.75000 3625 .12500
3176 .88000 3251 .25500 3326 .63000 3401 .00500 3476 .38000 3551 .75500 3626 .13000
3177 .88500 3252 .26000 3327
.6
3500 3402 .01000 3477 .38500 3552 .76000 3627 .13500
3178 .89000 3253 .26500 3328 .64000 3403 .01500 3478 .39000 3553 .76500 3628 .14000
3179 .89500 3254 .27000 3329 .64500 3404 .02000 3479 .39500 3554 .77000 3629 .14500
3180 .90000 3255 .27500 3330 .65000 3405 .02500 3480 .40000 3555 .77500 3630 .15000
3181 .90500 3256 .28000 3331 .65500 3406 .03000 3481 .40500 3556 .78000 3631 .15500
3182 .91000 3257 .28500 3332 .66000 3407 .03500 3482 .41000 3557 .78500 3632 .16000
3183 .91500 3258 .29000 3333 .66500 340
8
.04000 3483 .41500 3558 .79000 3633 .16500
3184 .92000 3259 .29500 3334 .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
.0
5500 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 .07000 3489 .44500 3564 .82000 3639 .19500
3190 .95000 3265 .32500 3340 .70000 3415 .07500 3490 .45000 3565 .82500 3640 .20000
3191 .95500 3266 .33000 3341 .70500 3416 .08000 3491 .45500 3566 .83000 3641 .20500
3192 .96000 3267 .33500 3342 .71000 3417 .08500 349
2
.46000 3567 .83500 3642 .21000
3193 .96500 3268 .34000 3343 .71500 3418 .09000 3493 .46500 3568 .84000 3643 .21500
3194 .97000 3269 .34500 3344 .72000 3419 .09500 3494 .47000 3569 .84500 3644 .22000
3195 .97500 3270 .35000 3345 .72500 3420 .10000 3495
.4
7500 3570 .85000 3645 .22500
3196 .98000 3271 .35500 3346 .73000 3421 .10500 3496 .48000 3571 .85500 3646 .23000
3197 .98500 3272 .36000 3347 .73500 3422 .11000 3497 .48500 3572 .86000 3647 .23500
3198 .99000 3273 .36500 3348 .74000 3423 .11500 3498 .49000 3573 .86500 3648 .24000
3199 .99500 3274 .37000 3349 .74500 3424 .12000 3499 .49500 3574 .87000 3649 .24500
3200 166.00000 3275 .37500 3350 166.75000 3425 .12500 3500 167.50000 3575 .87500 3650 168.25000
3201 .00500 3276 .38000 3351 .75500 3426 .13000 350
1
.50500 3576 .88000 3651 .25500
3202 .01000 3277 .38500 3352 .76000 3427 .13500 3502 .51000 3577 .88500 3652 .26000
3203 .01500 3278 .39000 3353 .76500 3428 .14000 3503 .51500 3578 .89000 3653 .26500
3204 .02000 3279 .39500 3354 .77000 3429 .14500 3504
.5
2000 3579 .89500 3654 .27000
3205 .02500 3280 .40000 3355 .77500 3430 .15000 3505 .52500 3580 .90000 3655 .27500
3206 .03000 3281 .40500 3356 .78000 3431 .15500 3506 .53000 3581 .90500 3656 .28000
3207 .03500 3282 .41000 3357 .78500 3432 .16000 3507 .53500 3582 .91000 3657 .28500
3208 .04000 3283 .41500 3358 .79000 3433 .16500 3508 .54000 3583 .91500 3658 .29000
3209 .04500 3284 .42000 3359 .79500 3434 .17000 3509 .54500 3584 .92000 3659 .29500
3210 .05000 3285 .42500 3360 .80000 3435 .17500 3510 .55000 358
5
.92500 3660 .30000
3211 .05500 3286 .43000 3361 .80500 3436 .18000 3511 .55500 3586 .93000 3661 .30500
3212 .06000 3287 .43500 3362 .81000 3437 .18500 3512 .56000 3587 .93500 3662 .31000
3213 .06500 3288 .44000 3363 .81500 3438 .19000 3513 .56500 3588
.9
4000 3663 .31500
3214 .07000 3289 .44500 3364 .82000 3439 .19500 3514 .57000 3589 .94500 3664 .32000
3215 .07500 3290 .45000 3365 .82500 3440 .20000 3515 .57500 3590 .95000 3665 .32500
3216 .08000 3291 .45500 3366 .83000 3441 .20500 3516 .58000 3591 .95500 3666 .33000
3217 .08500 3292 .46000 3367 .83500 3442 .21000 3517 .58500 3592 .96000 3667 .33500
3218 .09000 3293 .46500 3368 .84000 3443 .21500 3518 .59000 3593 .96500 3668 .34000
3219 .09500 3294 .47000 3369 .84500 3444 .22000 3519 .59500 3594 .97000 366
9
.34500
3220 .10000 3295 .47500 3370 .85000 3445 .22500 3520 .60000 3595 .97500 3670 .35000
3221 .10500 3296 .48000 3371 .85500 3446 .23000 3521 .60500 3596 .98000 3671 .35500
3222 .11000 3297 .48500 3372 .86000 3447 .23500 3522 .61000 3597 .98500 3672
.3
6000
3223 .11500 3298 .49000 3373 .86500 3448 .24000 3523 .61500 3598 .99000 3673 .36500
3224 .12000 3299 .49500 3374 .87000 3449 .24500 3524 .62000 3599 .99500 3674 .37000