2
Functional Description
Mass Spectrometer
Thermo Scientific
TSQ Quantum XLS and TSQ Quantum GC User Guide
47
• Scan generator DSP
• Acquisition processor DSP
• Interbus bridge
• 100 base-T Ethernet port
The rf voltage generation electronic assemblies produce the Q0, Q1, Q2, and Q3 rf voltages
that enable ion transmission and mass analysis. All rf voltages are controlled by the Analyzer
Control PCB and the System Control PCB.
The Q1 and Q3 rf voltage amplifier circuits are identical, and the circuits for Q0 and Q2 are
similar.
The rf voltage generation electronic assemblies include the following components:
• rf oscillator
• rf Voltage Amplifier PCB
• Low Pass Filter PCB
• rf voltage coil
• rf voltage detector
• Mass DAC
• Integrating amplifier
The ion detection system electronic assemblies provide high voltage to the electron multiplier
and conversion dynode of the ion detection system. They also receive the electron multiplier
output current signal, convert it to a voltage (by the electrometer circuit), and pass it to the
embedded computer.
The ion detection system electronic assemblies include the following:
• Electron multiplier power supply
• Conversion dynode power supply
• Electrometer PCB
• Acquisition DSP
The Analyzer Control PCB contains circuitry for controlling and monitoring the operation of
the ion source, ion optics, mass analyzer, and ion detection system. These circuits are in turn
monitored by the PowerPC processor of the System Control PCB via the SPI bus.
The Analyzer Control PCB controls and monitors the rf voltages for Q0, Q1, Q2, and Q3
quadrupoles. It also has lens voltage drivers that convert
±
330 V dc power from the DC Rod
Driver PCB to dc voltages that are applied to the lenses
