JAY COR HPM OPERATION OPERATIONAL MANUAL SOLID STATE MODULATOR FOR THE BARON SYSTEMS RADAR WARNING INTERNAL VOLTAGES MAY CAUSE SEVERE SHOCK OR DEATH; USE CAUTION AND AVOID CONTACT WITH ENERGIZED COMPONENTS.
41 42 4-3 TABLE OF CONTENTS SECTION 1 GENERAL D OPTION Paragraph Title No. Introduction a Requirements -1 -2 General Description ~3 Front Panel Drawing Transmitter Outline Drawing SECTION 2 INSTALLATION INSTRUCTIONS 2-1 Introduction . 2-2 Unpacking and Inspection 2-3 Installation 2-4 Performance Check Qut SECTION 3 PRINCIPALS OF OPERATION 3-1 Introduction 3-2 System Function Description 3-3 System Operation. 3-4 28 VDC and Bias Supply (AZ).
SECTION 5 MAINTENANCE Introduction Periodic Maintenance Inspection and Cleaning. i. Power and Pulse Width Output Check...
SECTION 1 GENERAL DESCRIPTION 1-1. INTRODUCTION This manual contains information and procedures for operation of the Solid State Modulator for use in the Baron Transmitter using the Marian SF-349 Magneto. The manual is organized into three sections as follows: Section 1. Introduction and General Description Section 2. Preparation For Use Section 3. Principles of Operation Section 4. Operating Instructions Section 5. Maintenance 1-2.
Guise Widths Rise Time: Fall Time: Output Requirements: (measured at -3 dB power points): a. 05 b. 1.00 c. 2.00 equal to or less than 100 SEC (measured between the 10 and 90% power points): Less than 200 SEC (measured between the 90 and 10% power points): Stability: 0. 1 dB, Pulse to Pulse Spectrum: Side lobes greater than 12 dB down NOTE: The modulator will be capable of delivering the correct pulse stability and power to permit the necessary RF source performance.
Filaments: Input Trigger: Output Connections: HIPS Regulation: Altitude: Operating Ambient temperature: Humidity... Cooling. Dimensions: 19.25 16.00 27.25... Transmitter Weight: KV at 26 amperes. . Standby: 13.75 volts, stamps: Operate: Down to "0" volts at full duty 10 to 15 volts level signal with a pulse width of .5 use to 2 use via BNC connector. 50 ohm load The Magneto shall be connected directly to the Pulse Transformer using the 6 inch long leads provided with the magneto.
TABLE 1.
ACTIVE HIGH, 10-28V INPUT, OPT-ISOLATED PIN 10 FILAMENT READY ACTIVE HIGH, 10-15V TOTEM POLE OUTPUT (VCR, OPT-ISOLATED, INDICATING FILAMENT WARM-UP DELAY IS COMPLETED PIN 11 MAGNETO AIR FLOW SWITCH CONTACT TO GROUND INDICATING MAGNETO COOLING AIR FLOW PIN PIN 13 BUS RETURN/BUS COMMON RETURN VOR VCC IN, COMMON FOR COMMANDS PIN 14 -AC ON ACTIVE HIGH, 10-28V INPUT, OPT-ISOLATED PIN 15 -N/C NOTE: THE COMMAND AND STATUS SIGNALS ARE ISOLATED FROM THE TRANSMITTER GROUND BY OP TO-COUPLERS.
SECTION 2 PREPARATION FOR USE 2-1. INTRODUCTION This section contains unpacking, inspection and installation instructions for a Solid State Modulator/Transmitter for use with Baron Services Radar. 2-2. UNPACKING AND INSPECTION The ASSEMBLY is shipped in one container, carefully open the container and remove the Modulator assembly. Visually inspect Modulator for damage that may have occurred during shipment.
2.4 « After the magneto and dummy load is installed, Refer to paragraph 2.4, run minimum performance tests to ensure that the Transmitter meets performance standards. Installation Performance Check Out: 1. Insure Dummy Load is connected to transmitter RF Output Port 2. Place unit into standby operation, External trigger Pulse Train should be set for 1 use PW at 500 Hz PRF. Modulator is awaiting 5 minute time out. 3. Verify Filament Voltmeter indicates approximately 13.75V. 4.
SECTION 3 PRINCIPLES OF OPERATION PREEN ee A 3.1 INTRODUCTION This section contains a functional description of the Solid State Transmitter. A glossary of interface signals is provided in Table 1-1, page 1-4. Other sections give functional descriptions of the assemblies that make up the Transmitter Group. The schematics for each of the assemblies can be found in the back of the manual. 3.2 SYSTEM FUNCTIONAL DESCRIPTION The Transmitter employs a SF-349 pulsed magneto.
When the magneto starts pulsed operation, the peak current is sensed and converted to an average current for scheduling the filament voltages for proper magneto operation. As the duty cycle is increased, the filament voltage is reduced. This type of scheduling allows the transmitter to be operated at different duty cycles without concern for damage to the magneto. The average operating current of the magneto is monitored by the Interface & Control Card (A4A5).
3.6 CARD CAGE (Ad) The Card Cage houses the following * plug-in * circuit card assemblies (YUCCA: Master Regulator CCA (ARAB) » Control Conditioner CCA (Ada) » Interface and Control CCA (ALAS) « Extender Board (A4A3) The LIPS CCA (A4A2) is mounted onto the left side of the Card Cage and the Standby P/S, LV Monitor And Relay CCA (A4A1) is mounted onto the back of the Card Cage. 3.
7. Filament warm-up time delay when the AC voltage is first applied. 8. Fault logic used to protect the transmitter. The Interface and Control CCA has three adjustments which are as follows: « High Voltage «Maximum Magneto Current (Fault Threshold) o Filament Program Slope The CCA also has a three position test switch which allows: 1. “TEST” —The modulator LGBT gate drive to be enabled without having to wait for the filaments to time-out. This is an aid in troubleshooting. 2.
3.12 DC TO DC CONVERTER(AS) The DC to DC Converter is the line/load regulator and receives the unregulated 270 VDC output from the rectifier/filter. CAUTION: The 270 VDC is not referenced to ground. The DC to DC Converter contains a Buck regulator and a push-pull inverter that provides the step-up in output voltage and the necessary isolation between the primary AC input lines and the rest of the system.
and open when the transmitter internal operating temperature exceeds 95 degrees C. When an over-temperature occurs, one or more of the thermostats will open and generate a fault signal on the Fault interface CCA A-AS. When an over temperature fault occurs, the logic disables the Irradiate command. When the open thermostat is sufficiently cooled, it will reset (close) and the transmitter will automatically initiate HV ramp-up and radiate. 3.
SECTION -4 OPERATING INSTRUCTIONS 4.1 INTRODUCTION This section contains operating instructions for the Solid State Modulator using a “‘X” Band, SF-349, 250kw Magneto for the Baron Systems Radar. The Transmitter has a control panel for local operation and an I/O interface for remote control by a host system. 4-2. CONTROLS AND INDICATORS The location and function of all controls and indicators on the modulator assembly are shown in figure 4-1 and are described in table 4-1. TABLE 4-1.
FILAMENT VOLTAGE Let's the operator know what the voltage on the filaments are Meter, M3} at standby and when in "RADIATE” fo see if the filaments are being programmed properly. The standby voltage is 13.75 volts. TRANSMITTER POWER Indicates the transmitter AC voltage is “ON” and the (METER M2) transmitter is in Standby awaiting time-out. The nominal indication is 230VAC. FAULT Indicates one or more faults exist.
DUTY CYCLE YELLOW LED Duty cycle exceeded, (pulse Indicator (DS3) width x rep rate) and pulses are being dropped. ( Warning Only) POWER SUPPLY EVER CURRENT RED LED Indicates Indicator (DS4) the DC to DC converters has exceeded it rated output current. THIS FAULT iS LATCHED! LOW VOLTAGE POWER SUPPLY ~ RED LED indicate one or more of Indicator (DDS) the voltages are under voltage. MAGNETO PEAK CURRENT RED LED Indicates the peak Indicator (DS5) current has exceeded 33 amps for two pulses in a row.
4. Set STANDOFFISH switch to STANDBY position. The STANDBY indicator on the transmitter control panel should be lit and the internal cooling fans should operate. 5. Set the RF frequency adjustment on the magneto for the desired output frequency . NOTE: THE TRANSMITTER WARM-UP CYCLE TAKES APPROXIMATELY 5 MINUTES. WHEN THE WARM-UP CYCLE IS COMPLETE, THE FILAMENT/ READY INDICATOR WILL BE LIT, 6. Set OFF/SAFE/RADIATE switch to IRRADIATE position and observe the magneto average current.
SECTION § MAINTENANCE 5-1. INTRODUCTION This section contains periodic maintenance, test and trouble analysis procedures for the Solid State Transmitter located in the Baron Radar System. It also contains a description of test equipment required to perform the identified tasks. 5-2. PERIODIC MAINTENANCE Periodic maintenance requirements and the intervals at which the tasks should be performed. are listed in Table 5-1 CAUTION WEAR PROPER EYE PROTECTION TO AVOID EYE INJURY WHEN USING COMPRESSED AIR TABLE 5-1.
5-3. INSPECTION AND CLEANING . Inspection and cleaning should be performed every six (6) months. If the transmitter is operated in a severe dust environment, perform inspection and cleaning more often. OFF AND THE OFF/SAFE/HV RADIATE SWITCH IS IN THE SAFE POSITION Remove covers as necessary so cooling fans and interior of transmitter can be inspected for dirt and dust, Inspect and if necessary, clean the fan blades. If dust and dirt are allowed to accumulate, the cooling efficiency may be diminished.
55 REMOVAL OF MODULES Procedure #1 Standby Power Supply Low Voltage Monitor (Removal) 1. Remove 4 mounting screws on A2. 2. Loosen 2 captive screws on A2J1. Procedure #2 DC-DC Converter AS (Removal) 1. Loosen 2 captive screws on assembly's J1. 2. Remove 4 mounting screws from underside of drawer. 3. Disconnect black and white output cables from TB2. Remove 4 mounting screws underneath sheaf. 2. Disconnect black and white high voltage cables. 3. Disconnect J1 and P1 from module.
CAUTION: Be sure to tighten the magneto plate screws or the contact resistance to ground for the magneto can cause problems 1. Connect the magneto return braid with 2 screws 2. Connect P1 and P2 to the oil can.