SpinCore Technologies PA100W Owner's Manual
PA100W
RF Power Amplifier
Owner’s Manual
SpinCore Technologies, Inc.
http://www.spincore.com
PA100W RF Power Amplifier
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SpinCore Technologies, Inc.
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© 2011 SpinCore Technologies, Inc. All rights reserved.
SpinCore Technologies, Inc. reserves the right to make changes to the product(s) or information herein without notice. RadioProcessor™,
PulseBlaster™, SpinCore, and the SpinCore Technologies, Inc. logos are trademarks of SpinCore Technologies, Inc. All other trademarks
are the property of their respective owners.
SpinCore Technologies, Inc. makes every effort to verify the correct operation of the equipment. This equipment version is not intended
for use in a system in which the failure of a SpinCore device will threaten the safety of equipment or person(s).
http://www.spincore.com 2 2012-09-21
PA100W RF Power Amplifier
Table of Contents
I. Precautions ................................................................................................... 4
Connecting & Disconnecting Power Amplifiers..............................................4
Power Considerations.....................................................................................4
II. PA100W – 100 W Power Amplifier Module ............................................... 5
1. Overview ...................................................................................................................... 5
2. Specifications .............................................................................................................. 5
DC Electrical Specifications.......................................................................................5
RF Specifications.......................................................................................................6
3. PA100W RF Module with De-blanking Circuitry ...................................................... 6
RF Input and Output Connectors...............................................................................7
TTL Control Input Connector ...................................................................................8
DC Power Input Connector ....................................................................................10
4. PA100W RF Module Enclosure Options ................................................................. 10
1) PA100W module enclosed in a single bay enclosure with an integrated +24 V
power supply – Figure 7...........................................................................................11
2) PA100W module enclosed in a dual bay enclosure with an integrated +24 V
power supply – Figure 8...........................................................................................11
3) PA100W module fully enclosed in a rack-mount enclosure................................13
5. Typical Set-Up For NMR Experiments .................................................................... 14
III. Related Products and Accessories ........................................................ 15
IV. Contact Information ................................................................................. 15
V. Document Information .............................................................................. 15
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PA100W RF Power Amplifier
I. Precautions
Working with RF power amplifiers can be dangerous and even fatal if not handled properly.
Output voltages can reach values greater than 200 V peak-to-peak and can be fatal. Follow these
steps to avoid damaging the amplifier or inflicting serious injuries.
Connecting & Disconnecting Power Amplifiers
When connecting the power amplifier, follow these steps to avoid damaging the amplifier or
inflicting serious injuries.
1. Apply the load to the amplifier (make sure a load is ALWAYS present when working with
power amplifiers).
2. Apply the DC power to the amplifier.
3. Apply the RF input to the amplifier.
Repeat the steps in reverse order when disconnecting the amplifier.
Power Considerations
Make sure the following considerations have been made before applying power to the amplifier.
1. Be sure your load can appropriately dissipate the maximum power being applied by the
amplifier.
2. When applying an RF signal, work with low duty cycles to limit the power being dissipated.
The duty cycle ratio should be below 1% for safe operation.
http://www.spincore.com 4 2012-09-21
PA100W RF Power Amplifier
II. PA100W – 100 W Power Amplifier Module
1. Overview
The PA100W RF power amplifier comes in a very compact broadband module delivering
100 Watts RMS (200 Watts PEP, Peak Envelope Power) into a 50-ohm load. It has a frequency
range of 10 MHz to 100 MHz and is powered by a DC +24 to +28 V power supply (with the negative
terminal grounded). The PA100W has standard female SMA jacks for RF input and output, and a
screw terminal block for the DC power input. The PA100W typically operates in Class AB. The rise
and fall time of the RF pulse output is approximately 200 ns.
The product comes with blanking circuitry – the blanking circuitry keeps the PA100W blanked
(turned off) until a TTL input (logical high) is applied. The blanking circuitry helps to conserve
power, keeps the amplifier cool under typical operating conditions, and provides noise reduction
during the reception of NMR signals. To enable (deblank) the power amplifier, a TTL pulse (logical
high) needs to be applied to the control circuitry.
The PA100W power amplifier module measures 3.15" x 2.54" x 2.33" (80 x 65 x 59 mm). It can
be delivered as a module (with the blanking circuitry) or in various enclosures - see the
“Configuration Options” section later in this document for more information.
http://www.spincore.com 5 2012-09-21
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