Discovery QDR Series Technical Manual
3-31
Figure 3-19. Tube Current Mode 1
11. Click X-Rays (F2) to turn X-Rays on.
12. Observe the oscilloscope. You should see a trace similar to Figure 3-20, approxi-
mately 4ms pulses with a peak amplitude of 10V (ignore the overshoot and mea-
sure current on the back, after it settles out). This corresponds to 10mA ± 35%
tube current.
If the scope trace seen is not as shown in either Figure 3-19 or Figure 3-20, the system
may have insufficient AC power, a faulty X-ray Controller, or a defective Tank.
Figure 3-20. Tube Current Mode 3
Note: Enter this information into the Radiation Measurement Report (see example on
page 3-70).
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