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Tomco BTM00250 ALPHA-S, Operation And Safety Manual, Page: 2 / 12

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TOMCO 250W RF AMPLIFIER MODULE 

MODEL BTM00250 ALPHA-S 

 

OPERATION AND SAFETY MANUAL

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

This handbook is provided in confidence, as a technical reference for use solely by the purchaser of the 

equipment.  The handbook or its contents may not be reproduced or distributed without written consent from 

Tomco Technologies. 

 

Tomco Technologies 

17 Clarke St 

Norwood SA 5067 

AUSTRALIA 

Ph +61 8 83642203 

Fax +61 8 83642202 

Email:  [email protected] 

 

©

 Tomco Electronics Pty Ltd 

July 2008 

 

Document No. T003375 Issue A 

Summary of Contents for BTM00250 ALPHA-S

Page 1: ...250W RF AMPLIFIER MODULE MODEL BTM00250 ALPHA S OPERATION AND SAFETY MANUAL ...

Page 2: ...e for use solely by the purchaser of the equipment The handbook or its contents may not be reproduced or distributed without written consent from Tomco Technologies Tomco Technologies 17 Clarke St Norwood SA 5067 AUSTRALIA Ph 61 8 83642203 Fax 61 8 83642202 Email support tomcorf com Tomco Electronics Pty Ltd July 2008 Document No T003375 Issue A ...

Page 3: ...L AND ON THE EQUIPMENT 3 TECHNICAL DESCRIPTION OPERATING NOTES AND INSTALLATION NOTES 4 INPUTS AND OUTPUTS 4 RF DRIVE input 4 GATE input 5 RF OUT connection 5 SIGNAL TIMING DIAGRAMS FOR PULSED OPERATION 6 STATUS INDICATORS 7 DC power 7 RF power 7 Overtemp 7 COOLING AND THERMAL PROTECTION 7 STATUS CONTROL INTERFACE 8 SPECIFICATIONS 9 ...

Page 4: ...must be aware that dangerous voltages are present within the equipment and on any load probe or antenna connected to its outputs When the amplifier is operating the RF field strength at various points in the near field of the RF load probe or antenna may exceed the safe continuous exposure level specified in international standards Personnel engaged in the operation or maintenance of this equipmen...

Page 5: ...NG The RF power transistors used throughout the amplifier contain a Beryllium Oxide substrate This substance is known to be highly toxic Personnel involved in maintenance or disposal of the equipment should be made aware of the hazard and follow local authority regulations regarding handling and disposal Teflon PTFE insulated coaxial cables have been used within the amplifier unit In a fire situat...

Page 6: ...d throughout the manual when important safety information is included Dangerous voltages are present Use extreme care CAUTION The caution symbol indicates a potential hazard Attention must be given to the statement to prevent damage destruction or harm Indicates protective earth terminal T003375 Issue A Page 3 ...

Page 7: ...fier is designed such that an RF drive level of approximately 0dBm is required to produce full output power at any frequency within its specified range The gain varies slightly with the operating frequency Applying more than approximately 0dBm of RF drive may result in more than the rated output power as the amplifier enters compression It is safe to operate the amplifier in compression if desired...

Page 8: ...edthrough is not critical it is perfectly safe to apply CW RF drive directly to the amplifier A GATE signal must still be applied and the maximum duty cycle and pulse width limitations must still be observed The impedance of the GATE input is 1000 ohms The amplifier in pulsed mode is specified for a maximum GATE duty cycle of 20 and a maximum GATE pulse width of 100 milliseconds RF OUT connection ...

Page 9: ...ting system However greater flexibility and in some cases better results will be obtained if the timing of the amplifier s GATE is independently adjustable In particular if the amplifier is gated on slightly in advance of the RF drive being applied the bias and noise blanking circuits will have time to settle before the pulse commences Depending on the characteristics of the amplifier s RF load th...

Page 10: ...very low output levels or at very low duty cycles the LED will light very dimly Overtemp The Overtemp status indicator monitors the temperature of the amplifier module heatsink If the LED is lit then the heatsink temperature is above its allowable limit In this case GATE input is disabled off until the heatsink temperature drops to acceptable levels If the Overtemp LED lights check the amplifier d...

Page 11: ...nsufficient thermal management are likely causes Status Control Interface A 9 way D type connector is provided to allow remote monitoring and control over the module The pins are as follows 1 DC Power OK 15V 2 RF Power Out Detected 3 Over Temperature 4 Duty Limit 5 Gate In 6 9 Ground Each of these signals is logic level 0 5V A high indicates the condition is asserted The output impedance of pins 1...

Page 12: ... compression power Spurious 70dBC Rise fall times 100ns typical pre gated Output noise blanked 10dB above thermal 1MHz bandwidth Noise figure Approx 10dB Phase stability 5 max change over a 1ms pulse Phase change power 5 max change from 30dB to full power Phase stability time 1 max change in 24hrs Input VSWR 2 1 max Load VSWR Approx 2 5 1 max without external protection The module does not incorpo...

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