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3 CI Troubleshooting
Signal-Related Symptoms
This section describes symptoms related to the signal. The symptom may be
too much signal, too little signal, a noisy signal, or an incorrect signal.
Signal-related symptoms are generally observed during tuning, but may also be
observed during data acquisition.
Error messages in autotune due to insufficient signal may vary.
The following symptoms are covered in more detail in this section:
• No peaks, see page 75.
• No or low reagent gas signal, see page 77.
• No or low PFDTD signal, see page 79.
• Excessive noise, see page 80.
• Low signal-to-noise ratio, see page 80.
• Large peak at m/z 19, see page 81.
• Peak at m/z 32, see page 82.
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