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ATRAD ST-40 System Operation Manual

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ATRAD
D
M
A
R
S
ESIGN AND
ANUFACTURE OF
TMOSPHERIC
ADAR
YSTEMS
ST-40
S
O
YSTEM
PERATION
M
ANUAL
© Copyright by ATRAD 2007
All Rights Reserved
ATRAD Pty Ltd
ABN 72 112 121 801
Thebarton, SA, 5031
1/26 Stirling Street
Australia
P/No: 15-05004, Issue 2
1

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Summary of Contents for ATRAD ST-40

  • Page 1 ATRAD ESIGN AND ANUFACTURE OF TMOSPHERIC ADAR YSTEMS ST-40 YSTEM PERATION ANUAL © Copyright by ATRAD 2007 All Rights Reserved ATRAD Pty Ltd ABN 72 112 121 801 Thebarton, SA, 5031 1/26 Stirling Street Australia P/No: 15-05004, Issue 2...
  • Page 2 P/No: 15-05004, Issue 2...

  • Page 3: Table Of Contents

    3.3 PA MODULE........................16 3.4 PA CONTROLLER......................20 3.5 RF DISTRIBUTION MODULE..................23 4 SUB-RACK - RF POWER COMBINER..........25 4.1 OVERVIEW........................25 5 ST-40 SYSTEM ASSEMBLY............28 5.1 MECHANICAL ASSEMBLY..................28 5.2 ELECTRICAL ASSEMBLY..................28 5.3 RF CABLE ASSEMBLY....................28 6 REFERENCES.................. 29...
  • Page 4 Block Diagram 9. PA Controller Block Diagram 10. VHF PA Controller (Front Panel Connectors) Block Diagram 11. RF Distribution Module Block Diagram 12. RF Distribution Module (Front Panel Connectors) 23 Block Diagram 13. ST-40 RF Power Combiner P/No: 15-05004, Issue 2...

  • Page 5: System

    19” rack mount Cooling Forced air-cooled 1.2Rack Layout The ST-40 VHF Transmitter is composed of a number of sub-systems, here referred to as sub-racks. The three main sub-racks are, 1. DC Power Supply (x2), 2. RF Power Combiner (x1) and 3.

  • Page 6: Block Diagram 1. St-40 Rack (Front)

    (3 RU) RF Power Combiner (1 RU) Vent Panel (9 RU) ST-20 Vent Panel (1 RU) (2 RU) DC Power Supply (1RU) Vent Panel Block Diagram 1. ST-40 Rack (Front) Block Diagram 2. ST-40 Rack (Rear) P/No: 15-05004, Issue 2...

  • Page 7: Picture 1. St-40 Rack (Front View)

    Picture 1. ST-40 Rack (Front View) Picture 2. ST-40 Rack (Rear View) P/No: 15-05004, Issue 2...

  • Page 8: Sub-Rack - Dc Power Supply

    2 Sub-Rack - DC Power Supply 2.1 Overview Picture 3. Valere, L Series Compact Shelf, DC Power Supply Picture 4. Valere, L Series Compact Shelf, DC Power Supply The Valere Compact DC Power System (L Series Compact Shelf) accepts an AC Voltage between 180 and 264 VAC, 47 to 63 Hz, and produces a regulated output of 42-56 VDC capable of delivering a maximum of 200 Amperes (depending on the number of deployed Rectifiers, i.e 50 Amperes per rectifier) in an ambient operating temperature range of -40...

  • Page 9: Ps Controller

    2.2 PS Controller This section refers to the BC Series Controllers menu's and configuration options. In particular, there are three menu levels 1. Basic, 2. Main 3. Administrator. We will restrict ourselves to the Basic and Main menu as it is recommended that the controller settings are not altered without consultation, care should be exercised in using the Administrator menu.

  • Page 10: Ps Rectifier

    2.3 PS Rectifier The modular, plug-n-play nature of this Power Supply makes diagnostics and repair very easy. The rectifiers are hot swappable modules, which can be removed while the system is running without effecting operation. Rectifier Model: V2500A, Series 2:14, Input: [200-240 VAC, 0-15A, 50/60Hz], Output: [42-56 VDC, 0- 50A].

  • Page 11: Sub-Rack - St-20

    Block Diagram 3. ST-20 System The ST-20 is the heart of the ST-40 Transmitter. When fully loaded the ST-20 is capable of delivering 20 KW at 10% duty cycle. A Block Diagram of the ST-20 is shown above. As can be seen the system consists of four types of modules 1.

  • Page 12: Block Diagram 4. St-20 Sub-Rack (Rear)

    Block Diagram 4. ST-20 Sub-Rack (Rear) (3 RU) Panel Description Panel A-6RU: DC Power Input Panel B-6RU: VHF PA Controller Panel C-6RU: Blank Panel ABCD-3RU: Blank (6 RU) Panel D-6RU: VHF PA Driver Panel E-3RU6RU: Fan Module (10 HP) (10 HP) (8 HP) (14 HP) (42 HP)

  • Page 13: Block Diagram 6. Tx Trigger Pulse

    The RF output of the ST-40 was captured via a Tektronics Digital Oscilloscope (TDS3052B) as is displayed in Figure 1 below. The equipment required for this test included: the ST-40, a RF Signal Generator (51 Mhz @ +13dBm), Trigger Pulse Generator (1usec pulse@ 1KHz), RF Sniffer and a High Power Load (50 ohms @ 1KW ).

  • Page 14: Pa Driver

    3.2 PA Driver Hardware Specifications Operating Frequency Range 30-60 MHz Peak Envelope Power 150 W PEP (per channels) Number of Channels 6 equal Amplitude, 0 phase VSWR (Input/Output) 1.5:1 (minimum) Maximum PRF Dependent on pulse width and maximum Duty Cycle Pulse Shape Gaussian, Square Maximum Duty Cycle...

  • Page 15: Picture 7. Vhf Pa Driver (Top View)

    DC Power DC Power Monitor RF Power Monitor Temperature Monitor VSWR Monitor MRF151G Bias Control PD55015 Bias Control PD55015 Block MRF151G Block RF Input (100mW PEP) 1:6 RF Power Divider (1KW PEP) Block Diagram 7. VHF PA Driver Picture 7. VHF PA Driver (Top View) Picture 8.

  • Page 16: Pa Module

    3.3 PA Module Hardware Specifications Operating Frequency Range 30-60 MHz Peak Envelope Power 4 KW PEP (minimum) VSWR (Input/Output) 1.5:1 (minimum) Maximum PRF Dependent on pulse width and maximum Duty Cycle Pulse Shape Gaussian, Square Maximum Duty Cycle 10 % Gaussian, 12% Square Output Spurious and Harmonics Better than –35 dBc Impedance (Input/Output)

  • Page 17: Picture 9. Vhf Pa Module (Top View)

    DC Power MRF151G Bias Control DC Power Monitor RF Power Monitor MRF151G Block Temperature Monitor VSWR Monitor RF Input (120W PEP) MRF151G Block MRF151G Block RF Output (4KW PEP) 1:4 RF Power Divider 1:4 RF Power Combiner (120W PEP) (4KW PEP) MRF151G Block Block Diagram 8.

  • Page 18: Picture 10. Vhf Pa Module (Bottom View)

    Picture 10. VHF PA Module (Bottom View) P/No: 15-05004, Issue 2...

  • Page 19: Pa Controller

    3.4 PA Controller RS232 PHY RS232 uP SRAM Interface uP JTAG Ethernet PHY RJ45 Atmel uP Interface CPLD JTAG (Trig In) (Trig Out) CPLD (RF In) RF Modulator DAC SRAM (RF Drive) DC Power Mini-Con-X Interface +12 V Regulator (Control) DC Power +5 V Regulator Maxi-Con-X...

  • Page 20: Block Diagram 10. Vhf Pa Controller (Front Panel Connectors)

    (Mini-Con-X, 8 Pin Connector (Part No. 7282-8PG- 300) [Conxall, http://www.conxall.com/ Auxiliary Maxi-Con-X Custom interface to monitor external Atrad Tx accessories such as the ST-40 12:1 Com- biner, the Combiner/Splitter/TR-Switch. (Maxi-Con-X, 18 Pin Connector (Part No. 14282- 18PC-300) [Conxall, http://www.conxall.com/ VHF PA Controlle r Block Diagram 10.
  • Page 21 Connector Details Direction Notes 10-Pin DIL uP Programming Factory/Field Programming Connector Details Direction Notes 10-Pin DIL CPLD Programming Factory/Field Programming Monitor LED Indicators 1. Supply LED – DC power to the Module is present 2. Trigger LED – Tx Trigger Signal present 3.

  • Page 22: Rf Distribution Module

    3.5 RF Distribution Module Block Diagram 11. RF Distribution Module P/No: 15-05004, Issue 2...

  • Page 23: Block Diagram 12. Rf Distribution Module (Front Panel Connectors)

    Details Connectors Notes RF Output 4 RF Output to ST-20 ('No. 4') OUT 4 PHASE Phase & Amplitude Adjust Screw Holes Phase and Amplitude GAIN adjustable over ± 'few' % RF Output 3 RF Output to ST-20 ('No. 3') OUT 3 PHASE Phase &...

  • Page 24: Sub-Rack - Rf Power Combiner

    6:1 RF Combiner RF Coupler RF Output @ 20KW PEP (DIN 7/16) RF Monitor (N Type) RF Power Monitor Auxiliary Temperature Monitor (18 pin, Maxi-Con-X) DC Power Monitor RF Power Combiner Block Diagram 13. ST-40 RF Power Combiner P/No: 15-05004, Issue 2...

  • Page 25: Picture 13. Rf Power Combiner (Rear View)

    Picture 13. RF Power Combiner (Rear View) Picture 14. RF Power Combiner (Front View) P/No: 15-05004, Issue 2...
  • Page 26 External User Interfaces Connector Details Notes N (x 12) RF Inputs Input Level: 4 KW typical (1260 Vpp) BNC (x 2) RF Monitor RF sniffer of the 20 KW outputs Maxi-Con-X Auxilary Custom interface from PA Controller. The PA Controller scans this port at power-on and at (Part No.

  • Page 27: System Assembly

    5.2 Electrical Assembly AC mains supply The ST-40 rack is typically wired to suit Australia (and China) with a three-phase 240/415 MEN system (Mains Earthed Neutral). Circuit Breakers The order of the circuit breakers is top to bottom, left to right so the left-most circuit breaker is currently wired to the top left PSU module slot, the next 3 circuit breakers belong to the rest of the top PSU chassis slots and the next 4 circuit breakers belong to the bottom PSU chassis slots.

  • Page 28: References

    6 References [1]. Helge Granberg. “Get 600 Watts RF from Four Power FETs”. Motorola Engineering Bulletin EB104, 1983. [2]. Helge Granberg. “Building Push-Pull Multioctave, VHF”. Motorola Application Note AR305, 1987. [3]. Valere, http://www.valerepower.com , Compact DC Power System – L Series Compact Shelf, V5, 2005. [4].

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