Bruker BioSpin BLAH2000-I E C, Operating & Service Manual

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Operating & Service Manual Version 001 BRUKER BIOSPIN 5 (47)
1
General
Information 1
Introduction 1.1
The BLAH2000-I E C Amplifier 300MHz is a narrowband linear pulse power
amplifier specifically designed for Magnetic Resonance Imaging (MRI)
applications up to 7 Tesla systems.
It is commercialized under the BRUKER BIOSPIN part number W1345551.
It is operated in AB linear class and provides 2000W and more peak RF power at
300MHz frequency.
The amplifier is equipped with N-Channel MOS Broadband RF Power FETs
transistors of the latest generation. The unit can provide full power for any
combination of pulse width and duty cycle up to 10ms and 5% for 2000W RF
output Power.
Its built-in protection circuitry will allow lower power pulses for longer pulse widths
and duty-cycles, maintaining up to 100W average power on the 2000W RF
output.
The electronic protection circuitry has been designed to protect against:
•
Excessive power output level (overdrive)
•
Excessive pulse repetition rate (over duty-cycle protection)
•
Excessive pulse duration (over pulse-width)
•
More than 50% reflected RF power (mismatch when VSWR
≥
6)
•
Thermal protection (overheat)
The amplifier is also equiped with a CAN interface for the Siemens MAGNETOM
electronic platform and can be used in combination with the Siemens
syngo
software.
Internal monitiring provides detailed status information wich is transfered over the
CAN bus to the syngo MR error logger.
The supply is self protected for overcurrent and overvoltage.
The amplifier is housed in a 19", 4U, 520mm deep rack cabinet and is powered by
an internal switched power supply assembly that provides the +32VDC for the
power amplifiers, in addition to all low level voltages for the system.