LTQ Orbitrap XL Hardware Manual
LTQ Orbitrap XL Hardware Manual
LTQ Orbitrap XL Hardware Manual
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Preamplifier<br />
Functional Description<br />
Printed Circuit Boards<br />
Figure 1-25 shows the preamplifier (P/N 207 8900) 1 . The preamplifier<br />
is located in a housing next to the Cold Ion Gauge.<br />
Figure 1-25. Preamplifier board<br />
Cooling water supply<br />
for Peltier element<br />
Cold Ion Gauge<br />
This board is a broadband preamplifier with differential<br />
high-impedance inputs. It serves as a detection amplifier and impedance<br />
converter for the image current created by the oscillating ions. The<br />
output current is transferred to the data acquisition board. It has an<br />
amplification factor of about 60 dB and covers the frequency range from<br />
15 kHz to 10 MHz.<br />
The diagnostic LEDs on the preamplifier are listed in Table 1-3 on<br />
page 1-34. The positions of the diagnostic LEDs on the board are<br />
indicated by white rectangles in Figure 1-25.<br />
1 Part number of complete unit.<br />
Thermo Fisher Scientific <strong>LTQ</strong> <strong>Orbitrap</strong> <strong>XL</strong> <strong>Hardware</strong> <strong>Manual</strong> 1-33
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