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Nautel XL12 Technical Instructions

Am broacast transmitter 12 000 watt six preset power levels
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AM BROACAST TRANSMITTER
(SIX PRESET POWER LEVELS)
Nautel Maine Inc.
201 Target Industrial Circle,
Bangor, Maine USA 04401
Phone: (207) 947-8200
Fax: (207) 947-3693
ISO 9002 REGISTERED
TECHNICAL INSTRUCTIONS
XL12
12 000 WATT
Original Issue ................... 01 January 2002
e-mail: support@nautel.com
web: www.nautel.com
© Copyright 2002 NAUTEL. All rights reserved
Nautel Limited
Hackett's Cove, RR #1 Tantallon,
Nova Scotia Canada B0J 3J0
Phone: (902) 823-3900
Fax: (902) 823-3183
ISO 9001 REGISTERED

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  • Page 1 201 Target Industrial Circle, Hackett’s Cove, RR #1 Tantallon, Bangor, Maine USA 04401 Nova Scotia Canada B0J 3J0 Phone: (207) 947-8200 Phone: (902) 823-3900 Fax: (207) 947-3693 Fax: (902) 823-3183 ISO 9002 REGISTERED ISO 9001 REGISTERED © Copyright 2002 NAUTEL. All rights reserved...
  • Page 2 12 000 WATT AM BROADCAST TRANSMITTER XL12 LIST OF EFFECTIVE PAGES The list of effective pages lists the status of all pages in this manual. Original pages are identified by a zero in the Change No. column. Pages subsequently changed are identified by the date of the change number. On a changed page, the text affected by the latest change is indicated by a vertical bar in the margin opposite the changed material.
  • Page 3 12 000 WATT AM BROADCAST TRANSMITTER XL12 LIST OF EFFECTIVE PAGES (Continued) CHANGE CHANGE PAGE DATE PAGE DATE 01 January 2002 5-14 01 January 2002 01 January 2002 5-15 01 January 2002 01 January 2002 5-16 01 January 2002 01 January 2002...
  • Page 4 12 000 WATT AM BROADCAST TRANSMITTER XL12 LIST OF EFFECTIVE PAGES (Continued CHANGE CHANGE PAGE DATE PAGE DATE 8-17 01 January 2002 SD-5 01 January 2002 8-18 01 January 2002 SD-6 01 January 2002 8-19 01 January 2002 SD-7 01 January 2002...
  • Page 5 12 000 WATT FM BROADCAST TRANSMITTER XL12 ARTIFICIAL RESPIRATION (MOUTH-TO-MOUTH) START MOUTH-TO-MOUTH BREATHING IMMEDIATELY. SECONDS COUNT. Do not wait to loosen clothing, warm the casualty, or apply stimulants. ASSESS RESPONSIVENESS OF CASUALTY. Do not jar Figure 1) casualty or cause further physical injury (...
  • Page 6 12 000 WATT FM BROADCAST TRANSMITTER XL12 GENERAL RULES FOR TREATMENT FOR BURNS, BLEEDING, AND SHOCK After casualty has revived, treat for injuries and shock. Reassure casualty. Try to make him comfortable. Keep him reasonably warm but do not apply heat.
  • Page 7 12 000 WATT FM BROADCAST TRANSMITTER XL12 ELECTRIC SHOCK - RESCUE METHODS Electricity can damage the body in a number of ways. It may interfere with the proper functioning of the nervous system and the heart action, it can subject the body to extreme heat and can cause severe muscular contractions.
  • Page 8 Nautel for repair. The repairs will be made without charge to the Customer. Where warranty replacements or repair are provided under items 2 or 3, Nautel will pay that part of the shipping costs incurred in returning the part/assembly to the Customer.
  • Page 9 MODULE EXCHANGE SERVICE In order to provide Nautel customers with a fast and efficient service in the event of a problem, Nautel operates a factory rebuilt, module exchange service which takes full advantage of the high degree of module redundancy in Nautel equipment.

  • Page 10: Table Of Contents

    12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS Section Page GENERAL INFORMATION INTRODUCTION ...................... 1-1 FACTORY SUPPORT ....................1-1 PURPOSE AND SCOPE OF MANUAL ..............1-1 1.3.1 FAMILY TREE ......................1-1 PURPOSE OF EQUIPMENT ..................1-1 MECHANICAL DESCRIPTION .................. 1-1 TECHNICAL SUMMARY ..................
  • Page 11 2.1.13 PARTS SUPPLIED BY NAUTEL ................2-10 2.1.13.1 Ancillary Parts ....................2-11 2.1.14 PARTS REQUIRED BUT NOT SUPPLIED BY NAUTEL ..........2-11 2.1.14.1 Surge Protector Panel ..................2-11 2.1.15 TEST EQUIPMENT AND SPECIAL TOOLS .............. 2-11 NON-TECHNICAL PRE-COMMISSIONING ............... 2-12 2.2.1...
  • Page 12 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section Page INSTALLATION (Continued) 2.2.6.1 Installation of Reference Ground Stud ..............2-14 2.2.6.2 Installation of Fan Trays ..................2-14 2.2.6.3 Installation of RF Power Modules ............... 2-14 2.2.6.4 Installation of Main Power Transformer ..............2-15 2.2.6.5...
  • Page 13 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section INSTALLATION (Continued) 2.4.5.1 RF Power Checks .................... 2-30 2.4.5.2 Setting Preset RF Power Levels ................. 2-31 2.4.5.3 Setting RF Monitoring Voltages ................. 2-31 2.4.6 MODULATION CHECKS ..................2-33 2.4.6.1...
  • Page 14 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section OPERATING INSTRUCTION (Continued) 4.9.1.2 Exciter 'B' Active ....................4-4 4.9.1.3 Exciter Assemblies .................... 4-4 4.9.2 PRESET RF POWER SELECTION ................4-4 4.9.3 RF POWER TRIM ....................4-5 4.9.3.1 Increase RF Power .....................
  • Page 15 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section SYSTEM LEVEL TROUBLE SHOOTING (Continued) 5.5.8 LOW VOLTAGE POWER SUPPLY - RF DRIVE AMP ALARM ........5-5 5.5.9 LOW VOLTAGE POWER SUPPLY - BATTERY LOW ALARM ........5-5 5.5.10...
  • Page 16 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section THEORY OF OPERATION (Continued) RF DRIVE STAGE ....................6-4 6.4.1 REGULATED POWER SUPPLIES ................6-3 6.4.2 RF DRIVE AMPLIFIER ....................6-3 6.4.3 RF DRIVE TUNING ....................6-4 6.4.4 RF DRIVE TUNING PWB ..................
  • Page 17 12 000 WATT AM BROADCAST TRANSMITTER XL12 TABLE OF CONTENTS (Continued) Section THEORY OF OPERATION (Continued) 6.6.14.8 Filter Temperature Alarm ................... 6-10 6.6.14.9 Power Supply Temperature Alarm ..............6-10 6.6.14.10 Power Module Alarm ..................6-10 6.6.14.11 Power Supply Alarm ..................6-10 6.6.14.12...
  • Page 18 FAMILY TREE ......................8-1 MANUFACTURER'S INDEX ..................8-1 HOW TO LOCATE INFORMATION FOR A SPECIFIC PART ........8-1 8.4.1 WHEN NAUTEL CONFIGURATION CONTROL NUMBER IS KNOWN ......8-1 8.4.2 WHEN REF DES IS KNOWN ..................8-1 REFERENCE DESIGNATION INDEXES ..............8-1 COLUMN CONTENT EXPLANATION ................
  • Page 19 7-16 RF Amplifier Input ....................... 7-11 7-17 Tuned RF Drive ........................7-12 7-18 PDM Carrier Reference ....................... 7-14 7-19 Watchdog Timer Output ...................... 7-14 Family Tree - XL12 12kW AM Broadcast Transmitter .............. 8-6 Contents (Page 10) 01 January 2002...
  • Page 20 Electrical Schematic - RF Combiner/Output Filter (NAF101A/NAF102) ........SD-13 MD-1 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Top and Front) ..... MD-1 MD-2 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Rear and Sides) ....MD-2 MD-3 Assembly Detail - NAC101 Control/Monitor Panel ..............
  • Page 21 Test Voltages/Waveforms for System Control PWB (A1A3) ............ 7-14 Manufacturer's Code to Address Index ..................8-3 Reference Designation Index - XL12 12kW AM Broadcast Transmitter ........8-9 Reference Designation Index - NAC101 Control/Monitor Panel ..........8-13 Reference Designation Index - NARI25 Remote Interface PWB ..........8-15 Reference Designation Index - NAPI22 Exciter Interface PWB ..........

  • Page 22: General Information

    INTRODUCTION PURPOSE OF EQUIPMENT The XL12 AM broadcast transmitter system The XL12 - 12 000 watt AM broadcast is a totally solid state, medium wave, amplitude transmitter system is intended to be used in modulated, broadcast transmitter system. It may be conventional AM broadcasting stations.
  • Page 23 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 1-1 Test Equipment NOMENCLATURE PART, MODEL, OR TYPE NUMBER APPLICATION (EQUIVALENTS MAY BE USED) Dummy Load 50 ohms, 20,000 Watts (minimum) VSWR 'off-air' testing Digital Multimeter 3 1/2 digit, AC and DC volts (10M ohms testing and maintenance input), ohms and amps, ±0.5% accuracy,...

  • Page 24: Special Tools

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 1-2 Special Tools NOMENCLATURE PART, MODEL, OR TYPE NUMBER APPLICATION (EQUIVALENTS MAY BE USED) Torque Wrench Capable of torquing to four inch-pounds Installing power MOSFETs (0.532 Newton-Meters) HEX Wrench 5/32" or 4 mm...

  • Page 25: Installation

    PLANNING AND SITE PREPARATION NOTE A simple method of determining the number of Transmitter sites for Nautel's XL12 - 12 000 British thermal units (BTUs) per hour being watt AM broadcast transmitters should be prepared generated as waste heat is to multiply the average to receive the transmitter prior to its delivery and/or RF output power (in watts) by 0.1905 (waste heat...

  • Page 26: Station Reference Ground

    Nautel for this purpose. If used, the which is positioned between its surge protection surge protector panel should be installed in close device and the transmitter.

  • Page 27: Power Consumption

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE 2.1.3.3 Power Consumption: When operating at There is only one external RF drive input. If it is 12kW with 100% modulation by a continuous sine used for both exciters, it is recommended the RF wave, power consumption is 21.43kW.

  • Page 28: Both Exciters Am Stereo (External Rf Drive)

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.1.6.1.2 When two audio sources are used, they 2.1.6.4 Exciter 'A' AM Stereo (Optional C- QUAM AM Stereo Exciter as RF Drive are both connected to terminals on the remote Source: When the optional C-QUAM AM stereo interface PWB.

  • Page 29: Internal Electrical Interlock

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE If external wiring is lengthy, unwanted transients may be induced on the 24V source. If this occurs, user supplied relay, with energized/de-energized state controlled by the external interlock switches, should be installed near the remote interface PWB.

  • Page 30: On/Off Control

    12 000 WATT AM BROADCAST TRANSMITTER XL12 EXCITER B input terminals are TB1-7(+) and TB1- 8(-) and the associated 3-pin header/2-socket shunt post on the remote interface PWB is E4. NOTE There must be a minimum two second interval between exciter selection commands.

  • Page 31: System Reset

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.1.8.5 System Reset: The system reset circuit 2.1.10 RF PERFORMANCE MONITORING: The transmitter provides outputs to monitor RF generates reset pulses which are applied to the performance. They include DC voltages which are AC/DC power, exciter and RF power stages.

  • Page 32: Remote Alarm Indications

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.1.11 REMOTE ALARM INDICATIONS: 2.1.11.3 High Reflected Power Alarm: Outputs that indicate stress thresholds for critical alarm output that indicates the peak reflected power parameters have been exceeded are available on is exceeding or has exceeded 2000 watts is available terminals of the remote interface PWB.

  • Page 33: B+ Power Supply Fault Alarm

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.1.11.9 B+ Power Supply Fault Alarm: 2.1.11.15 RF Power Shutback Alarm: An alarm alarm output that indicates the RF output has been output that indicates the RF output is being inhibited inhibited, because the output of the B+ DC power...

  • Page 34: Remote Status Indications

    A current-sink-to-ground will be present as the logic RF power levels. true condition when remote control is selected. 2.1.13 PARTS SUPPLIED BY NAUTEL: The An open collector or +5 VDC (depending on the following parts/materials are supplied by or are logic false option selected) will be present as the available from Nautel.

  • Page 35: Ancillary Parts

    AC power source to be provided to ensure initial installation is not delayed applied to the transmitter, is available from Nautel. because of a lost or damaged part and to allow the The surge protector panel will help protect the...

  • Page 36: Non-Technical Pre-Commissioning

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NON-TECHNICAL PRE-COMMISSIONING It is recommended the crates be positioned On delivery of the transmitter, the following near the transmitter's final assembly location non-technical procedures should be observed and prior to unpacking. The following crated and completed.

  • Page 37: Disassembly Required

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Ensure the cabinet's front edges are flush with Gain access to the interior of the RF output a straight line representing the front of the filter (A21) by removing its rear access panel.

  • Page 38: Reassembly

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE If disassembly of an RF power module is necessary, refer to its service instruction manual for details. Inspect the main power transformer assembly for obvious damage. Verify all attaching hardware is firmly tightened.

  • Page 39: Installation Of Main Power Transformer

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Secure each RF power module to its mounting tray using the retaining screw which is accessed through the hole in the front panel. Ensure the two large, electrolytic capacitors, Firmly tighten retaining screw.

  • Page 40: Ac Power Connection

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE to A23A1T1-Y1 The circuit breaker enclosure contains a number to A23A1T1-Y2 to A23A1T1-Y3 of knockouts (top and bottom) to accommodate different wiring configurations. The installer Locate three grey, 20AWG wires (#329, #330...

  • Page 41: Installation Of Rf Feed Cable

    12 000 WATT AM BROADCAST TRANSMITTER XL12 At the circuit breaker enclosure end, route the Verify the RF feed cable has been cut to the AC power wiring through the selected cable required length and has been terminated by a 1 entry hole.

  • Page 42: External Control Wiring

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Coaxial cable J2 ( RF MONITOR ) terminating at connect both control wires from each the remote interface PWB should be cut to the differential input to the appropriate terminals. appropriate length and terminated by a BNC 2.2.9.2 RF Performance Monitoring Wiring:...

  • Page 43: Audio Wiring

    Connect a continuous, low- impedance conductor (0 AWG copper wire, two-inch connect left audio's positive input to TB1-5, copper strap or equivalent), as described in Nautel's negative input to TB1-3 and shield to TB1-4. 'Lightning Protection for Radio Transmitter Stations'...
  • Page 44 12 000 WATT AM BROADCAST TRANSMITTER XL12 Figure 2-4 External Input/Output Interface Page 2-20 01 January 2002...

  • Page 45: Technical Pre-Commissioning

    12 000 WATT AM BROADCAST TRANSMITTER XL12 TECHNICAL PRE-COMMISSIONING Table 2-1 Primary Winding Taps for A23A1T1 Prior to applying AC power and turning on NOMINAL VOLTAGE PRIMARY WINDING TAPS the transmitter, some circuits must be customized to (RMS, PHASE-TO-PHASE) station's...

  • Page 46: Exciter Rf Drive Pwb Options

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.3.3 INTERNAL/EXTERNAL RF DRIVE Table 2-2 Primary Winding Taps for A23A2T1 SOURCE: RF drive and frequency synthesizer NOMINAL VOLTAGE DC PWR SUPPLY PWB PWBs have provision to use their integral RF (RMS, PHASE-TO-PHASE)

  • Page 47: Audio Pass Band Selection

    SOURCE switch has been set to the setting identified audio is subjected to. In some instances, AM for that option. stereo stations may wish to reduce/eliminate pass band influence. Nautel's field service department 2.3.7 REMOTE CONTROL CHOICES: will provide advice and recommendations based Remote control input circuits must be configured to on the installation.

  • Page 48: Alarm/Status Output Choices

    If the resistor arrays were not factory installed, whole set. sufficient quantities included transmitter's ancillary parts kit (Nautel P/N 2.3.8.1 Logic False - Open Collector: When the UF17). logic false output for an alarm/status output must be If a resistor array is installed, all outputs which...

  • Page 49: Alarm Display Options

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.3.9 ALARM DISPLAY OPTIONS: 2.3.9.1 Continuous Alarm Display: There are two display options available for the ALARM continuous alarm display is desired, install shunt post display LEDs on the control/monitor panel. They E1 in the...

  • Page 50: Commissioning Procedures

    12 000 WATT AM BROADCAST TRANSMITTER XL12 COMMISSIONING PROCEDURES 2.4.1 PRECAUTIONS OBSERVED: The transmitter contains many solid These procedures are in a step-by-step format. They will permit a person who is not familiar state devices which may be damaged if subjected to with the transmitter to perform required checks.
  • Page 51 12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE In lieu of normal station programming, connect Exciter B is selected in the following procedures, an audio signal generator [preset to 1000Hz at unless a test specifically requires exciter A to be a zero output level (turned off)], between TB2- selected.

  • Page 52: Dc Volts Meter Readings

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 2-5 DC Volts Meter Readings Reset or verify the protection and alarm circuits are reset. Press/release the SYSTEM METER READING RESET switch. METER SCALE SELECTED All bicolor STATUS lamps shall be green.

  • Page 53: Rf Drive Checks

    12 000 WATT AM BROADCAST TRANSMITTER XL12 2.4.4 RF DRIVE CHECKS: Check the frequency, symmetry and level of the RF drive for the 'A' and 'B' exciters as follows: Verify the requirements of paragraph 2.4.3 have been completed and are being met.

  • Page 54: Rf Drive Level

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Figure 2-7 2 ƒ pdm Frequency Waveform Figure 2-6 Balanced RF Amplifier Output 2 ƒ pdm = 150 kHz (DC Coupled) ƒ c = 1700kHz (AC Coupled) Verify EXCITER - RF DRIVE lamp is green Select exciter A.

  • Page 55: Setting Preset Rf Power Levels

    0.0 watts. the desired results if any other voltage/impedance combination is used. If difficulty is experienced, Select forward power to be displayed on the consult Nautel's field service department. meter ( KILOWATTS FORWARD POWER (0-14kW) lamp is on).
  • Page 56 RMS or less than 0.714 volts RMS, verify potentiometer (R26). requirements of steps (a) thru (f) are being met. Contact Nautel's field service department Select preset RF power level 4 (lamp in if problem persists. switch shall be on); verify the RF...
  • Page 57 12 000 WATT AM BROADCAST TRANSMITTER XL12 2.4.6 MODULATION CHECKS: Verify the Verify the audio input is configured as a common source for exciter 'A' and 'B' (exciter RF output is appropriately modulated when audio is interface PWB's AUDIO SOURCE...

  • Page 58: Modulation Checks

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Set the output level of the audio signal Set the C-QUAM AM stereo exciter PWB to produce an AM stereo output. Set its STEREO generator to zero (turned off). ENABLE switch to the STEREO position.

  • Page 59: Placing Transmitter On-Air

    2.1.6 3. Select , noting its integral lamp shall EXCITER B If a Nautel C-QUAM AM stereo exciter is turn on. installed as exciter A's RF drive source refer to paragraphs 2.1.6 4. Repeat steps (g) and (h) for exciter B's interphase PDM driver PWB.

  • Page 60: Special Adjustment Procedures

    Two RF drive PWBs (A and B) are located on the incidental phase modulation (IPM) when an external exciter panel when Nautel's optional C-QUAM AM stereo generator is the RF drive source for an AM stereo exciter is not installed. Refer to figure...

  • Page 61: Rf Current Level

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Adjust output of audio generator for a 90 Terminate or verify the RF output is terminated percent modulation depth indication on the left into a precision 50 ohm, resistive, 20kW plus right (L + R) channel of the station's dummy load.

  • Page 62: Controls And Indicators 3.1 General

    12 000 WATT AM BROADCAST TRANSMITTER XL12 SECTION 3 CONTROLS AND INDICATORS GENERAL RF DRIVE TUNING PWB CONTROLS The following section is intended to Table 3-3 identifies controls on the RF drive familiarize operators and maintainers with the various tuning PWB (A11A2). The table identifies the panel controls and indicators contained in the transmitter.

  • Page 63: 8-Input Rf Combiner/Filter Assembly

    12 000 WATT AM BROADCAST TRANSMITTER XL12 8-INPUT COMBINER/ FILTER FORWARD/REFLECTED POWER PROBE ASSEMBLY ASSEMBLY Table 3-6 identifies controls and/or indicators Table 3-7 identifies controls and/or indicators on the 8-input RF combiner/filter assembly (A22). on the forward/reflected power probe assembly The table identifies the panel marking, or when there (A21A2).

  • Page 64: Control/Monitor Panel Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT FORWARD POWER MD-3 ♥ A1A1DS3 When turned on, indicates the forward power level is selected as the RF output parameter to be displayed by the RF KILOWATTS meter (read upper scale).
  • Page 65 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT -15V MD-3 ♣ A1A2DS8 When turned on, indicates the output voltage of the active exciter's regulated -15 VDC power supply is selected as the...
  • Page 66 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT RF POWER - SHUTBACK MD-3 ♦ A1A3DS6 Bi-colour display which indicates the on/off status of the pulse duration modulation (PDM) pulse trains.
  • Page 67 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT EXCITER - MODULATOR MD-3 ♦ A1A3DS10 Bi-colour display which indicates status of over modulation PROTECTION protection circuit. Display is green when the modulating audio is satisfactory and it is not being influenced (restricted) by the over modulation protection circuit.
  • Page 68 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT EXCITER - INTERPHASE PDM MD-3 ♦ A1A3DS14 Bi-colour display which indicates the status of the pulse DRIVE duration modulation frequency ( ƒ...
  • Page 69 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT OUTPUT NETWORK - MD-3 ♦ A1A3DS19 Bi-colour display which indicates the status of the TEMPERATURE temperature inside the RF output filter.
  • Page 70 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT SOLID/FLASHING MD-3 ♠ A1A3E1 Bi-position selector circuit that allows the user to configure alarm lamps to be solid or a flashing display.
  • Page 71 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT CONTROL - ∧ ∧ MD-3 ♦ A1A3S1 Push button switch that causes an incremental increase in (INCR RF PWR)
  • Page 72 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT CONTROL - ∨ ∨ MD-3 ♦ A1A3S2 Push button switch that causes an incremental increase in (DECR RF PWR)
  • Page 73 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT CONTROL - EXCITER A MD-3 ♦ A1A3S6 Push button switch that selects exciter 'A' as the main exciter when it is pressed and released. Its integral lamp will be on when exciter 'A' is the active exciter.
  • Page 74 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT CONTROL - RF ON MD-3 ♦ A1A3S8 Push button switch that turns on the transmitter's RF power stage when it is pressed and released. Its integral lamp will be on when the RF power stage is turned on.
  • Page 75 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT STATUS CONTROL - MD-3 ♦ A1A3S15 Push button switch that activates the alarm recall feature ALARM RECALL when held depressed (integral lamp will turn on while held depressed).
  • Page 76 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT RF PWR OFF MD-3 ♠ A1A4E2 Bi-position selector circuit that allows the user to configure RF PWR OFF input to accept either an open ended or a differential remote control input.
  • Page 77 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT DECR RF PWR MD-3 ♠ A1A4E12 Bi-position selector circuit that allows the user to configure DECR RF PWR input to accept either an open ended or a differential remote control input.
  • Page 78 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT MD-3 n RF PWR 4 A1A4R29 Adjusted, in conjunction with selection of the remote interface PWB's E22/E23 shunt posts, to set the RF monitor output to 5.0 volts rms (14.14 volts peak-to-peak) when...
  • Page 79 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-1 Control/Monitor Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT DC VOLTS SELECT Displays DC voltage selected by the associated A1M3 MD-3 METER SCALE STATUS CONTROL - switch when enabled ( METER ON/OFF switch's integral lamp is on).

  • Page 80: Exciter Panel Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-2 Exciter Panel Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT AUDIO SOURCE STEREO, DUAL SINGLE A2A1S1 MD-7 Three position switch ( , or ), with its setting determined by the number of audio inputs being applied and/or the exciter RF drive configuration.
  • Page 81 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-2 Exciter Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT Freq Divider A2A1 ♦ E2 Bi-position selector circuit that selects one of two (/2 or /4) MD-6 oscillator frequency ( ƒ...
  • Page 82 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-2 Exciter Panel Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT AUDIO FILTER A2A1 ♥ S1 MD-6 Binary selector switch that selects one of four frequencies (7.5kHz, 10.5kHz, 13.5kHz or 16.0kHz) as the modulating audio's 1.0dbm roll-off point.

  • Page 83: Rf Drive Tuning Pwb Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-3 RF Drive Tuning PWB Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT RF DRIVE THRESHOLD A11A2R5 MD-10 Adjusted to set the RF drive fail threshold to detect a failure in an RF drive amplifier or series RF tuning circuit.

  • Page 84: Rf Drive Stage Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-4 RF Drive Stage Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT +15V A11A4DS1 MD-11 When turned on, indicates +15 VDC is being applied to the control circuit of exciter A's regulated DC power supply (A11A4).

  • Page 85: Ac/Dc Power Supply Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-5 AC/DC Power Supply Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT B+ (A/B) MD-2 Fuses B+ to RF power modules 'A' and 'B' at 20 amperes. B+ (C/D) MD-2 Fuses B+ to RF power modules 'C' and 'D' at 20 amperes.
  • Page 86 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-5 AC/DC Power Supply Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT +24 V (Unreg) A28F2 MD-26 Fuses unregulated +24V supplied to choke L3 at 10 amperes. -24 V (Unreg)
  • Page 87 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-5 AC/DC Power Supply Controls and Indicators (Continued) PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT A29DS5 MD-27 When turned on, indicates the DC power supply's unregulated -8V power supply is producing an output and it is applied to the DC power supply monitor PWB.
  • Page 88 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-6 8-Input RF Combiner/Filter Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT Filter Interlock A22S1 MD-18 Micro switch that is held in its spring-loaded, normally open position and completes the combiner/filter portion of the internal interlock circuit when the filter's ground wand is properly stored in its retaining clips.

  • Page 89: Forward/Reflected Power Probe Controls And Indicators

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 3-7 Forward/Reflected Power Probe Controls and Indicators PANEL MARKING/ NOMENCLATURE FUNCTION USED IN TEXT REFLD PWR CAL A21A2A1S1 MD-16 In-circuit elements determine load impedance for the secondary winding of the forward/reflected power probe's RF current transformer.
  • Page 90 WARNING IEC215 ENTRY KIT OPTION If the XL12 transmitter is equipped with an The following will not remove the AC power IEC215 kit to help ensure operator safety, the rear source voltage from the transmitter or inhibit any...
  • Page 91 12 000 WATT AM BROADCAST TRANSMITTER XL12 ELECTROSTATIC PROTECTION PRE-STARTUP CHECKS transmitter's assemblies contain Prior to applying input power to the semiconductor devices that are susceptible to transmitter, observe the following: damage from electrostatic discharge. Prior to removing an assembly from the transmitter, and...
  • Page 92 12 000 WATT AM BROADCAST TRANSMITTER XL12 LOCAL/REMOTE CONTROL 4.7.2 READING DC VOLTS METER: The VOLTS transmitter's operational control meter displays the selected input voltage functions (RF on/off status, preset RF power level on one of three scales when the meter has been...
  • Page 93 12 000 WATT AM BROADCAST TRANSMITTER XL12 OPERATIONAL CONTROLS Exciter A Assemblies Synthesizer PWB ........A2A1A4 The following operational controls select or DC Power Supply PWB ......A2A1A3 vary functions that are/may be routinely changed by Interphase PDM Driver PWB ....... A2A1A6 an operator during normal operation: RF Drive DC Power Supply ......
  • Page 94 12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE 4.9.3 RF POWER TRIM: The RF power level The RF output should not be set to a level that is of the selected preset RF power level can be less than 1000 watts.

  • Page 95: Latching Alarms

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE The continuous/flashing display feature is a user determined option that is preset during technical pre-commissioning installation procedures. 4.10.2 DISPLAY TYPE: There are two types of alarm circuits (latching and non-latching) that control DISPLAY indicators.
  • Page 96 12 000 WATT AM BROADCAST TRANSMITTER XL12 TESTING DISPLAYS 4.12.2.1 If the malfunctioning interphase PDM 4.11 The integral lamps of the control/ monitor driver is part of the selected main exciter, a two panel's push-button switches, its meter input selection stage sequence of events will occur.

  • Page 97: Reference Designation Index - Nac101 Control/Monitor Panel

    12 000 WATT AM BROADCAST TRANSMITTER XL12 TURN-ON EXPECTATIONS 4.12.3.2 Over Temperature Detector: Each 4.13 Following is the sequence of events that RF power module has an over temperature detector should occur when AC power is first applied to the circuit.
  • Page 98 PROCEDURE PARAGRAPH The XL12 transmitter contains many solid state Trouble shooting : devices that may be damaged if subjected to excessive heat or high voltage transients. Every RF POWER MODULES Alarm ..........5.5.1 effort must be taken to ensure circuits are not RF INTERLOCKS - EXTERNAL Alarm ........
  • Page 99 12 000 WATT AM BROADCAST TRANSMITTER XL12 5.3.1 ON-AIR TROUBLE SHOOTING: On- is not available, trouble- shooting for a majority of faults can be performed with RF power turned off. air trouble shooting can be performed from a remote The transmitter may remain connected to its antenna location or locally at the transmitter site.
  • Page 100 12 000 WATT AM BROADCAST TRANSMITTER XL12 5.5.1 RF POWER MODULES ALARM: An Attempt to reset the RF power module by RF POWER MODULES alarm indicates a failure RESET pressing on its front panel. If it successfully resets, the alarm indication may in one or more RF power modules.
  • Page 101 If the transformer taps are correct, the correct 3-phase rectifier monitoring circuit is suspect. Contact Nautel assemblies are functional, the monitoring circuit for trouble shooting information. is suspect. Contact Nautel for trouble shooting information. 5.5.5 POWER SUPPLY OVER VOLTAGE ALARM: An OVER VOLTAGE 5.5.7...
  • Page 102 BATTERY If no faults were found in steps (d) and (e), the to turn on. This helps prevent chemical dripping monitoring circuit is suspect. Contact Nautel from old batteries and to ensure adequate for trouble shooting information backup voltage for the system control PWB's microcontroller when AC power is turned off.

  • Page 103: Rf Drive Amplifier Output Waveform

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Figure 5-1 RF Drive Amplifier Output Waveform Figure 5-2 ƒ c Output Waveform ƒ c = 1700kHz (AC Coupled) ƒ c = 1700kHz (AC Coupled) On the exciter interface PWB, measure the The RF drive alarm initiates an automatic following: exciter changeover to the standby exciter.

  • Page 104: Rf Drive Waveform

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Figure 5-3 RF Drive Waveform ƒ c = 1700kHz (AC Coupled) Figure 5-4 Interphase PDM Waveform ƒ pdm = 75kHz (DC Coupled) NOTE If the C-QUAM stereo exciter or frequency The interphase PDM alarm initiates an...
  • Page 105 12 000 WATT AM BROADCAST TRANSMITTER XL12 Figure 5-5 Interphase PDM Waveform ƒ pdm = 75kHz (DC Coupled) Figure 5-6 ƒ pdm Waveform ƒ pdm = 75kHz (DC Coupled) Measure DC voltage at U1-16 on the exciter 5.5.13 EXCITER MODULATOR interface PWB.

  • Page 106: Chopper Control Waveform

    12 000 WATT AM BROADCAST TRANSMITTER XL12 5.5.15 EXCITER - STANDBY ALARM: STANDBY alarm indicates that the standby exciter is operating and that the transmitter has switched from STANDBY main exciter to standby exciter. The alarm may be caused by a fault in the transmitter that...
  • Page 107 12 000 WATT AM BROADCAST TRANSMITTER XL12 If the RF output power does not cutback, the Verify the VSWR of the output load does not ALARM RECALL fault no longer exists. Press exceed 1.2:1 ratio. The fault that caused cutback shall turn red.

  • Page 108: Reference Designation Index - Nafp90 Forward/Reflected Power Probe

    12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE Using ohmmeter, measure the impedance alarm will always cause a . If VSWR SHUTBACK across thermistor A21RT1. If the reading is the problem occurs three times within three lower than 33K ohms, unplug the MTA...
  • Page 109 12 000 WATT AM BROADCAST TRANSMITTER XL12 Place a short circuit between TP4 and ground Using the screwdriver (Nautel Part# HAZ79) on the RF drive tuning PWB. from the transmitter ancillary kit, adjust RF power module A's RF drive tuning inductor for Remove the connector from E1 on RF drive a minimum reading.
  • Page 110 12 000 WATT AM BROADCAST TRANSMITTER XL12 NOTE VOLTAGE CONTROL Adjust the potentiometer If an operational RF power module is available, on the exciter A RF drive regulated power it may be installed in the transmitter while the supply A11A4 until a reading of 22 volts peak- power module is being serviced.
  • Page 111 12 000 WATT AM BROADCAST TRANSMITTER XL12 PWB REPLACEMENT/ADJUSTMENT METER ON/OFF Ensure to toggle to enable the Install and adjust replacement printed wiring meters before pressing RF boards as follows: Install the batteries removed in step (a). 5.7.1 SYSTEM CONTROL...
  • Page 112 12 000 WATT AM BROADCAST TRANSMITTER XL12 5.7.2 DISTRIBUTION Remove and retain mounting hardware for the REPLACEMENT/ADJUSTMENT: exciter interface PWB. Pull the board away Install a from the four remaining boards. It may be replacement distribution PWB as follows (see figure...
  • Page 113 12 000 WATT AM BROADCAST TRANSMITTER XL12 Refer to the Transmitter Configuration Sheet Remove faulty interphase PDM driver PWB and to paragraph 2.3.1.2 of this manual to set from exciter panel and retain hardware. DC power supply links Install new interphase PDM driver PWB using Turn on AC power at the service entrance.
  • Page 114 SECTION 6 THEORY OF OPERATION GENERAL EXCITER STAGE The theory of operation for the XL12 AM The exciter stage contains two independent broadcast transmitter is presented in this section. exciter sections (A and B) which can be selected automatically or by local or remote control. Each...

  • Page 115: Audio Source

    12 000 WATT AM BROADCAST TRANSMITTER XL12 III. Dual Audio Source: If separate, mono audio The modulating audio signal will be applied to the A interphase driver under normal conditions when sources are used for each transmitter exciter, the Audio Source switch S1 is set to...
  • Page 116 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.3.2.3 C-QUAM AM Stereo Exciter PWB: The PDM sample is also compared against a bias voltage proportional to the carrier ref voltage to The optional C-QUAM AM stereo exciter PWB provides the carrier frequency ƒ c signal and a signal determine if the PDM pulse width is in correct proportion to the applied gain control voltage.
  • Page 117 12 000 WATT AM BROADCAST TRANSMITTER XL12 RF DRIVE STAGE 6.4.2 RF DRIVE AMPLIFIER: The RF drive The RF drive stage amplifies the carrier amplifier is a class D amplifier switching at the frequency signal Fc generated by the active RF drive carrier frequency Fc.
  • Page 118 12 000 WATT AM BROADCAST TRANSMITTER XL12 RF POWER STAGE 6.5.1.1 Fan Control: The fan control is a solid The RF power stage comprises eight RF state switch for the RF power module cooling fans power modules, an RF output filter/combiner section, which is turned on when the associated transmitter status is active.
  • Page 119 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.5.1.4 Fan Current Limiters: The supply voltage 6.5.3.2 RF Output Filter: The RF output filter for the RF power module cooling fans is passed thru (A21) accepts the combined RF output signal from positive temperature coefficient (PTC) thermistors.
  • Page 120 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.5.3.6 Surge Arrestor Assembly: Monitors critical parameters and causes the The surge carrier reference voltage to be turned off arrestor assembly (A22A11) monitors the RF voltage (shutback) or reduced (cutback) when defined level at the combiner's common point. Whenever...
  • Page 121 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.6.5 RF ON/OFF CONTROL: 6.6.10 PWM INHIBIT CONTROL: The remote on/off control circuit must be the equivalent of a external PWM (pulse width modulation) inhibit single pole, three position (on/off/on) switch. Each switching circuit must be the equivalent of a single of the on positions must be spring-loaded to return to pole, single throw (on/off) switch.
  • Page 122 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.6.13.1 Forward Power Level: 6.6.14.1 RF Stress Current Alarm: The RF Current Alarm output is applied to the remote buffered DC voltage that is representative of the BFRD FWD forward power level is available at the...
  • Page 123 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.6.14.6 Internal Interlock Alarm: 6.6.14.12 Modulation Protection Alarm: The Internal Interlock Alarm output is applied to the Modulation Protection Alarm output is applied to INT INTLK ALARM ALARM - MOD PROTECT. remote interface PWB's terminal.
  • Page 124 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.6.15.2 RF On Status : The RF On Status EMERGENCY ON/OFF switch S1 is located on the front output is applied to the remote interface PWB's door and is used to de-energize the charge and full...
  • Page 125 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.7.3.2 B+ Monitor: A sample of the B+ supply When the 3-phase AC supply voltage is removed from the transmitter, contactors A23K1 and A23K2 voltage is compared against fixed reference de-energize and power supply control PWB applies a thresholds to detect an over or under B+ supply voltage condition.
  • Page 126 12 000 WATT AM BROADCAST TRANSMITTER XL12 6.7.4 DC POWER SUPPLY MONITOR PWB A bias voltage is established at the non-inverting input to U1/B (nominally 3 VDC relative to (see figure SD-12): The DC power supply monitor reference point 1) by resistors R19 and R20. When...
  • Page 127 12 000 WATT AM BROADCAST TRANSMITTER XL12 SECTION 7 COMPONENT LEVEL TROUBLE SHOOTING TROUBLE SHOOTING REFERENCE DATA 7.3.3 DC POWER SUPPLY PWB : Table 7-3 The information provided in this section is provides typical test voltages for the DC power intended to assist an experienced electronic supply PWB.
  • Page 128 12 000 WATT AM BROADCAST TRANSMITTER XL12 CONTROL/MONITOR FUNCTION 7.5.2 RF POWER MODULE: There are no The following section provides trouble user accessible test points on the RF power module. shooting information for the control/monitor function. Refer to the RF power module service instruction manual for trouble shooting information.

  • Page 129: Test Voltages For Exciter Interface Pwb (A2A1)

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-1 Test Voltages for Exciter Interface PWB (A2A1) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Ground Ground PDM 1 3 ± 0.5V PDM 2 3 ± 0.5V Detected Carrier Reference 2 ± 0.5V Carrier Reference 7.5 ±...

  • Page 130: Ƒc Unbalanced Drive

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-2 Test Voltages/Waveforms for RF Drive PWB (A2A1A1/A2A1A4) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Ground Ground Ground Ground Ground Ground Carrier Frequency ƒ c See figure 7-3 IPM Compensation Input ƒ c Unbalanced Drive See figure 7-1 2 ƒ...

  • Page 131: Test Voltages For Dc Power Supply Pwb (A2A1A2/A2A1A3)

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-3 Test Voltages for DC Power Supply PWB (A2A1A2/A2A1A3) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Ground Ground +15V 15 ± 0.4V 5.0 ± 0.2V -15V -15 ± 0.4V -5.0 ± 0.2V Page 7-5 01 January 2002...

  • Page 132: Mod Level Detector Input

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-4 Test Voltages/Waveforms for Interphase PDM Driver PWB (A2A1A5/A2A1A6) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Mod Level Detector Input See figure 7-4 Mod Level Detector Output See figure 7-5 Audio with Positive Peak Limiting...

  • Page 133: Audio With Positive Peak Limiting

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Monitor TP3, RF= 12kW @95% Mod, ƒ = 20Hz Monitor TP9, RF = 12kW @ 50% Mod, ƒ = 1000Hz Figure 7-8 Carrier Level Control Output Figure 7-6 Audio with Positive Peak Limiting Monitor TP10, ƒ...

  • Page 134: Pdm1 Output

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Monitor TP14, RF = 12kW @ 50% Mod, ƒ = 1000Hz Monitor TP16, RF = 12kW (No Modulation), ƒ = 72kHz Figure 7-10 Interphase Generator Input - PDM 1 Figure 7-12 PDM1 Output Monitor TP15, RF = 12kW @ 50% Mod, ƒ...
  • Page 135 12 000 WATT AM BROADCAST TRANSMITTER XL12 Monitor TP18, ƒ = 72kHz Figure 7-14 ƒ Output Page 7-9 01 January 2002...

  • Page 136: Test Voltages For Regulated Power Supply Pwb (A11A4/A11A5)

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-5 Test Voltages for Regulated Power Supply PWB (A11A4/A11A5) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM +48V Supply Ground Reference Ground RF Drive B+ See Transmitter Configuration sheet Ground Reference Ground Page 7-10 01 January 2002...

  • Page 137: Rf Amplifier Output

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-6 Test Voltages/Waveforms for RF Drive Amplifier (A11A1/A11A3) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM RF Amplifier Output See Figure 7-15 RF Amplifier Input See Figure 7-16 Monitor TP1 Monitor E1 Figure 7-16 RF Amplifier Input...

  • Page 138: Tuned Rf Drive

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-7 Test Voltages/Waveforms for RF Drive Tuning PWB (A11A2) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Ground Reference Ground Detected RF Drive 6.5V RF Drive Fail Alarm (not active) Tuned RF Drive See Figure 7-17 Monitor TP4, ƒc = 1700kHz...

  • Page 139: Test Voltages/Waveforms For Distribution Pwb (A16)

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-8 Test Voltages/Waveforms for Distribution PWB (A16) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Filter Temperature Threshold 6.8V Ground Reference Ground Ground Reference Ground Filter High Temp Alarm (Not Active) Detected RF Current Sample 1.54V RF Current Detector Bias 1.62V...

  • Page 140: Pdm Carrier Reference

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 7-9 Test Voltages/Waveforms for System Control PWB (A1A3) LOCATION DESCRIPTION TEST VOLTAGE/WAVEFORM Ground Reference Ground XMTR Fault PDM Carrier Reference See figure 7-18 Carrier Reference +7 - +8V Ground Ground Volt Meter Output...
  • Page 141 CONTROL NUMBER IS KNOWN: Locate the explanation of the purpose and contents of each information for a part when the Nautel configuration column in the reference designation indexes. control number is known, as follows: 8.6.1 USE CODE COLUMN:...
  • Page 142 JAN/ MIL number has been assigned as the manufacturer's part number, where practical, to assist the user in finding a suitable replacement part. The use of this number does not restrict Nautel from selecting and using commercial equivalents, where their use will not degrade circuit operation or reliability, during manufacture.
  • Page 143 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-1 Manufacturers' Code to Address Index 0APZ0 Diodes Incorporated, 09675 Raytheon Canada Limited, 3050 E. Hillcrest Drive, 400 Phillips Street, Westlake Village, California 91362 PO Box 1619, Waterloo, Ontario, Canada 0GP12 Radial Incorporated...
  • Page 144 432 Toyama Road, 87 Marshall Street, Sunnyvale, California 94086 North Adams, Massachusetts 01247 35005 Dale Electronics Canada Limited, 57655 Nautel Maine Incorporated, 18 Howden Road, 201 Target Industrial Circle Scarborough, Ontario, Canada Bangor, Maine 04401 M1R 3E6 USA customers use - 91637...
  • Page 145 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-1 Manufacturers' Code to Address Index (Continued) 73831 Hammond Mfg Company Limited, 90797 Spang Industries Incorporated 394 Edinburgh Road North, Magnetics Division Guelph, Ontario, Canada PO Box 391 N1H 1E5 Butler, Pennsalvania 16001...

  • Page 146: Family Tree - Xl12 12Kw Am Broadcast Transmitter

    RF POWER MODULE INTERPHASE PDM DRIVER PWB NAP29 NAP29 NAPM06 (SEE NAP29 MANUAL) (SEE NAP29 MANUAL) (SEE NAPM06 MANUAL) F1830336 V1 Figure 8-1 Family Tree - XL12 12kW AM Broadcast Transmitter (Sheet 1 of 3) Page 8-6 01 January 2002...
  • Page 147 (SEE TABLE 8-2) FAN TRAY FAN TRAY 183-8350 183-8350 (SEE TABLE 8-2) (SEE TABLE 8-2) FAN TRAY 183-8350 F1830337 V1 (SEE TABLE 8-2) Figure 8-1 Family Tree - XL12 12kW AM Broadcast Transmitter (Sheet 2 of 3) Page 8-7 01 January 2002...
  • Page 148 IEC215 ENTRY KIT NAPS16 NAPI48 NAPX15/? NAX163 (SEE TABLE 8-17) (SEE TABLE 8-18) (SEE NAPX15 MANUAL) (PART OF TABLE 8-2) F1830338 V1 Figure 8-1 Family Tree - XL12 12kW AM Broadcast Transmitter (Sheet 3 of 3) Page 8-8 01 January 2002...

  • Page 149: Reference Designation Index - Xl12 12Kw Am Broadcast Transmitter

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-2 Reference Designation Index - XL12 12kW AM Broadcast Transmitter NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE 12kW AM Broadcast Transmitter XL12 183-8750 37338 Control/Monitor Panel...
  • Page 150 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-2 Reference Designation Index - XL12 12kW AM Broadcast Transmitter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE DC Power Supply PWB NAPS16B See Table 8-17...
  • Page 151 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-2 Reference Designation Index - XL12 12kW AM Broadcast Transmitter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE Connector, MTA, Keyed, 4-Pin, 22AWG JU27 644463-4 00779...
  • Page 152 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-2 Reference Designation Index - XL12 12kW AM Broadcast Transmitter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE Fuseblock, 30A, 600V, 2-Position FD02 BM6032SQ 71400 USE CODE EXPLANATION ♦...
  • Page 153 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-3 Reference Designation Index - NAC101 Control/Monitor Panel NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Control/Monitor Assembly NAC101 183-2050 37338 Meter Switch/Monitor PWB, 2 Status...
  • Page 154 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-3 Reference Designation Index - NAC101 Control/Monitor Panel (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Ribbon Cable Assembly, 26 Cond 183-2021 183-2021 37338 W2P1 Connector, IDC, DIP, 26 Socket, 0.1 x 0.1...
  • Page 155 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Remote Interface PWB NAPI25A 183-2015-01 37338 Capacitor, Ceramic, 0.1uF 10% 100V...
  • Page 156 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Capacitor, Ceramic, 0.1uF 10% 100V CCG07 CKR06BX104KRV 56289 Capacitor, Ceramic, 0.1uF 10% 100V...
  • Page 157 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Post Shunt, 2 Socket-Contacts, 0.10 Centre JQ15 390088-2 09482 Post Shunt, 2 Socket-Contacts, 0.10 Centre JQ15...
  • Page 158 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 2200 Ohms, 2% 1/2W RC41...
  • Page 159 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 470 Ohms, 5% 2W RBP11...
  • Page 160 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-4 Reference Designation Index - NAPI25 Remote Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Header, SIP, 3 Pin-Contacts, 0.10 Centre 161-3008-03 161-3008-03 37338 Header, SIP, 3 Pin-Contacts, 0.10 Centre...

  • Page 161: Reference Designation Index - Napi22 Exciter Interface Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-5 Reference Designation Index - NAPI22 Exciter Interface PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Exciter Interface PWB NAPI22E 183-3017-05 37338 ♦ RF Drive PWB...
  • Page 162 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-5 Reference Designation Index - NAPI22 Exciter Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Capacitor, Ceramic, 0.0022uF 10% 100V CCG02 CKR05BX222KRV B/14 56289 Capacitor, Ceramic, 0.0022uF 10% 100V...
  • Page 163 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-5 Reference Designation Index - NAPI22 Exciter Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Inductor, Choke, 2.5 Turns, J Material LA16 82-152-J...
  • Page 164 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-5 Reference Designation Index - NAPI22 Exciter Interface PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 5.62 Ohms, 1% 1/2W RC10...

  • Page 165: Reference Designation Index - Nae83 Rf Drive Panel

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-6 Reference Designation Index - NAE83 RF Drive Panel NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ƒ1 RF Drive Panel (530-800kHz) NAE83/01 183-8600-01 37338 ƒ2 RF Drive Panel (801-1050kHz)

  • Page 166: Reference Designation Index - Naaa02 Rf Drive Amplifier

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-7 Reference Designation Index - NAAA02 RF Drive Amplifier NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE RF Drive Amplifier Assembly NAAA02 183-3029 37338 Capacitor, Plastic, 0.12uF 5% 630V...

  • Page 167: Reference Designation Index - Napi60 Rf Drive Tuning Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-8 Reference Designation Index - NAPI60 RF Drive Tuning PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE ƒ1 RF Drive Tuning PWB (530-800kHz) NAPI60/01 183-3134-01 37338 ƒ2...
  • Page 168 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-8 Reference Designation Index - NAPI60 RF Drive Tuning PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 33.2K Ohms, 1%, 1/4W...
  • Page 169 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-8 Reference Designation Index - NAPI60 RF Drive Tuning PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Transformer, RF Drive Current 183-1135 183-1135 37338...

  • Page 170: Reference Designation Index - Naps10 Regulated Dc Power Supply Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-9 Reference Designation Index - NAPS10 Regulated DC Power Supply PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Regulated Power Supply PWB NAPS10B 183-3027-02 37338 Capacitor, Ceramic, 1.0uF 100V...

  • Page 171: Reference Designation Index - Napi50 Distribution Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-10 Reference Designation Index - NAPI50 Distribution PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Distribution PWB NAPI50B 183-8090-02 37338 Capacitor, Ceramic, 0.1uF 10% 100V...
  • Page 172 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-10 Reference Designation Index - NAPI50 Distribution PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Header, MTA, Keyed, 12 Posts, 0.156 Centre JU21 1-640383-2 09482 Header, MTA, Keyed, 12 Posts, 0.156 Centre JU21...
  • Page 173 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-10 Reference Designation Index - NAPI50 Distribution PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 39.2K Ohms, 1% 1/4W RAB44 MF55D3922F...

  • Page 174: Reference Designation Index - Naf102 Rf Output Filter

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-11 Reference Designation Index - NAF102 RF Output Filter NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ƒ1 RF Filter, (535-610kHz) NAF102/01 183-6085-01 37338 ƒ2 RF Filter, (611-680kHz)
  • Page 175 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-11 Reference Designation Index - NAF102 RF Output Filter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE NOTE: Partial reference designation shown. Prefix with A21 (composite ref des prefix, including all higher assemblies) to obtain complete reference designation Duplicated reference designations indicate an option exists for that item.
  • Page 176 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-12 Reference Designation Index - NAFP90 Forward/Reflected Power Probe NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Forward/Reflected Power Probe NAFP90A 183-6300-01 37338 Power Probe PWB...
  • Page 177 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-12 Reference Designation Index - NAFP90 Forward/Reflected Power Probe (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Connector, Coaxial, BNC, 50 , Bulkhead JDP26 UG1094/U...
  • Page 178 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-13 Reference Designation Index NAF101 8-Input RF Combiner/Filter NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ƒ1 8 Input Combiner Filter, (535-610kHz) NAF101A/01 183-6080-11 37338 ƒ2 8 Input Combiner Filter, (611-680kHz)

  • Page 179: Reference Designation Index - Naf101 8-Input Rf Combiner/Filter

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-13 Reference Designation Index - NAF101 8-Input RF Combiner/Filter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ƒ3 Capacitor, Mica, Cast, 6800pF 5% 10000V CU14 293100B682J00 00853 ƒ4...
  • Page 180 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-13 Reference Designation Index - NAF101 8-Input RF Combiner/Filter (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE NOTE Partial reference designation shown. Prefix with A21A3 (composite ref des prefix, including all higher assemblies) to obtain complete reference designation.

  • Page 181: Reference Designation Index - Napp02 Rf Current Probe Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-14 Reference Designation Index - NAPP02 RF Current Probe PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ♦ RF Current Probe PWB (535-1370kHz) NAPP02A 183-6050-02 37338 ♠...

  • Page 182: Reference Designation Index - Nax202/04 Surge Arrestor Assembly

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-15 Reference Designation Index - NAX202/04 Surge Arrestor Assembly NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE Surge Arrestor Assembly, 4000V NAX202/04 194-6070-04 37338 Capacitor, Ceramic, 0.047uF 10% 100V...

  • Page 183: Reference Designation Index - Nasr108 Ac/Dc Power Supply

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-16 Reference Designation Index - NASR108 AC/DC Power Supply NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. CODE ♠ AC/DC Power Supply, 188-240 VAC, 50/60Hz NASR108/01 183-7350-01 37338 ♣...

  • Page 184: Reference Designation Index - Naps16 Dc Power Supply Pwb

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-17 Reference Designation Index - NAPS16 DC Power Supply PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE DC Power Supply PWB NAPS16C 183-7020-03 37338 Capacitor, Elect, Snap Mt, 4700uF, 100V...
  • Page 185 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-17 Reference Designation Index - NAPS16 DC Power Supply PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Fuse, 3A, 250V, Slow, 3AG FA10 313003...
  • Page 186 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-17 Reference Designation Index - NAPS16 DC Power Supply PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Metal Film, 1000 Ohms, 5% 2W...
  • Page 187 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-17 Reference Designation Index - NAPS16 DC Power Supply PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE IC, Opto-Isolator, Triac Driver Output UX41 MOC3063...
  • Page 188 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-18 Reference Designation Index - NAPI48 DC Power Supply Monitor PWB NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE DC Power Supply Monitor PWB NAPI48B 183-7022-02...
  • Page 189 12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 8-18 Reference Designation Index - NAPI48 DC Power Supply Monitor PWB (Continued) NAME OF PART NAUTEL'S JAN/MIL/OEM CODE AND DESCRIPTION PART NO. PART NO. GRID CODE Resistor, Variable, Film, 100K Ohms, 1/2W RW01...
  • Page 190 12 000 WATT AM BROADCAST TRANSMITTER XL12 SECTION 9 ELECTRICAL SCHEMATICS INTRODUCTION UNIQUE SYMBOLOGY This section contains electrical schematics/ Nautel utilizes unique symbology logic diagrams for the subject equipment. Block electrical schematics to describe two-state (logic) diagrams, simplified electrical schematics and/or inputs/outputs which differ from those inputs/outputs logic diagrams may be included.
  • Page 191 (A1, A2A1, A2A1A1, etc) a table in section 8 of this manual, the schematic will are added be in this section. Enter table 10-1 to with the Nautel nomenclature number and/or the description to 9.9.1 Enter the family tree depicted in figure 8 -1 identify the appropriate figure number(s).

  • Page 192: Electrical Schematic - Xl12 - 12 000 Watt Am Broadcast Transmitter

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 9-1 List of Electrical Schematics Figure SD-1 Electrical Schematic - XL12 - 12 000 Watt AM Broadcast Transmitter Figure SD-2 Electrical Schematic - Exciter Stage Figure SD-3 Electrical Schematic - RF Drive Stage...
  • Page 193 Figure SD-1 Electrical Schematic - XL12 - 12 000 Watt AM Broadcast Transmitter Page SD-1 01 January 2002...
  • Page 194 Figure SD-2 Electrical Schematic - Exciter Stage Page SD-2 01 January 2002...
  • Page 195 Figure SD-3 Electrical Schematic - RF Drive Stage Page SD-3 01 January 2002...
  • Page 196 Figure SD-4 Electrical Schematic - RF Power Stage Page SD-4 01 January 2002...
  • Page 197 Figure SD-5 Electrical Schematic - Control/Monitor Functions Page SD-5 01 January 2002...
  • Page 198 Figure SD-6 Electrical Schematic - AC/DC Power Stage Page SD-6 01 January 2002...
  • Page 199 Figure SD-7 Electrical Schematic - Remote Interface PWB (NAPI25A) Page SD-7 01 January 2002...
  • Page 200 Figure SD-8 Electrical Schematic - Exciter Interface PWB (NAPI22E) Page SD-8 01 January 2002...
  • Page 201 Figure SD-9 Electrical Schematic - RF Drive Tuning PWB (NAPI60) Page SD-9 01 January 2002...
  • Page 202 Figure SD-10 Electrical Schematic - Distribution PWB (NAPI50B) Page SD-10 01 January 2002...
  • Page 203 Figure SD-11 Electrical Schematic - DC Power Supply PWB (NAPS16C) Page SD-11 01 January 2002...
  • Page 204 Figure SD-12 Electrical Schematic - DC Power Supply Monitor PWB (NAPI48B) Page SD-12 01 January 2002...
  • Page 205 Figure SD-13 Electrical Schematic - RF Combiner/Output Filter (NAF101C/NAF102) Page SD-13 10 July 2003...
  • Page 206 12 000 WATT AM BROADCAST TRANSMITTER XL12 SECTION 10 MECHANICAL DRAWINGS INTRODUCTION LOCATING ASSEMBLY DETAIL DRAWINGS 10.1 10.3 This section contains assembly detail Each illustration in this section is identified by drawings for the subject equipment. Dimensional a number that is both the figure number and the page drawings may be included.

  • Page 207: Assembly Detail - Xl12 12 000 Watt Am Broadcast Transmitter (Top And Front

    12 000 WATT AM BROADCAST TRANSMITTER XL12 Table 10-1 List of Mechanical Drawings Figure MD-1 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Top and Front) Figure MD-2 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Rear and Sides) Figure MD-3...
  • Page 208 Figure MD-1 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Top and Front) Page MD-1 01 January 2002...
  • Page 209 Figure MD-2 Assembly Detail - XL12 12 000 Watt AM Broadcast Transmitter (Rear and Sides) Page MD-2 01 January 2002...
  • Page 210 Figure MD-3 Assembly Detail - NAC101 Control/Monitor Panel Page MD-3 01 January 2002...
  • Page 211 Figure MD-4 Assembly Detail - NAPD07/01 and NAPD07/02 Meter/Switch Monitor PWBs Page MD-4 01 January 2002...
  • Page 212 Figure MD-5 Assembly Detail - NAPI25A Remote Interface PWB Page MD-5 01 January 2002...
  • Page 213 Figure MD-6 Assembly Detail - NAE73A Exciter Panel Page MD-6 01 January 2002...
  • Page 214 Figure MD-7 Assembly Detail - NAPI22E Exciter Interface PWB Page MD-7 01 January 2002...
  • Page 215 Figure MD-8 Assembly Detail - NAE83 RF Drive Panel Page MD-8 01 January 2002...
  • Page 216 Figure MD-9 Assembly Detail - NAAA02 RF Drive Amplifier Page MD-9 01 January 2002...
  • Page 217 Figure MD-10A Assembly Detail - NAPI60/01 and NAPI60/02 RF Drive Tuning PWB Page MD-10A 01 January 2002...
  • Page 218 Figure MD-10B Assembly Detail - NAPI60/03 and NAPI60/04 RF Drive Tuning PWB Page MD-10B 01 January 2002...
  • Page 219 Figure MD-11 Assembly Detail - NAPS10B Regulated Power Supply PWB Page MD-11 01 January 2002...
  • Page 220 Figure MD-12 Assembly Detail - NAPI50B Distribution PWB Page MD-12 01 January 2002...
  • Page 221 Figure MD-13 Assembly Detail - Fan Tray (P/N 183-8350) Page MD-13 01 January 2002...
  • Page 222 Figure MD-14 Assembly Detail - NAF102 RF Output Filter (Top View) Page MD-14 01 January 2002...
  • Page 223 Figure MD-15 Assembly Detail - NAF102 RF Output Filter (Rear View) Page MD-15 01 January 2002...
  • Page 224 Figure MD-16 Assembly Detail - NAFP90 Forward/Reflected Power Probe Page MD-16 01 January 2002...
  • Page 225 Figure MD-17 Assembly Detail - NAX161 Static Drain Choke Page MD-17 01 January 2002...
  • Page 226 Figure MD-18 Assembly Detail - NAF101 8-Input RF Combiner/Filter (Rear View) Page MD-18 01 January 2002...
  • Page 227 Figure MD-19 Assembly Detail - NAF101 8-Input RF Combiner/Filter (Side View) Page MD-19 01 January 2002...
  • Page 228 Figure MD-20 Assembly Detail - NAPP02 RF Current Probe PWB Page MD-20 01 January 2002...
  • Page 229 Figure MD-21 Assembly Detail - Capacitive Divider Assembly (176-8253) Page MD-21 01 January 2002...
  • Page 230 Figure MD-22 Assembly Detail - NAX202/04 Surge Arrestor Assembly (DWA00-555) Page MD-22 01 January 2002...
  • Page 231 Figure MD-23 Assembly Detail - NASR108 AC/DC Power Supply (Top View) Page MD-23 01 January 2002...
  • Page 232 Figure MD-24 Assembly Detail - NASR105 & /01 Power Transformer Assembly Page MD-24 01 January 2002...
  • Page 233 Figure MD-25 Assembly Detail - 3ø Rectifier (UP28) Page MD-25 01 January 2002...
  • Page 234 Figure MD-26 Assembly Detail - NAPS16C DC Power Supply PWB Page MD-26 01 January 2002...
  • Page 235 Figure MD-27 Assembly Detail - NAPI48B DC Power Supply Monitor PWB Page MD-27 01 January 2002...
  • Page 236 Figure MD-28 Dimensional Information - XL12 12 000 Watt AM Broadcast Transmitter Page MD-28 01 January 2002...
  • Page 237 Figure MD-29 Assembly/Dimensional Information - NAX165 Circuit Breaker Enclosure Page MD-29 01 January 2002...
  • Page 238 Figure SD-13 Electrical Schematic - RF Combiner/Output Filter (NAF101A/NAF102) Page SD-13 01 January 2002...

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