Adjustment Procedures
5–16 TDS 684A, TDS 744A, & TDS 784A Service Manual
a. Access Inner Probe Tip and Adjustment Ports:
HThe probe tip should be exposed from the procedure Measure Probe
Bandwidth. If not, follow the instructions in Figure 5–5 to expose
the probe tip.
HFollow the instructions in Figure 5–7 to remove the probe body
covers.
Use a small standard screwdriver to
pry between the cover and metal cord
connector to pop off cover.
Repeat for lower cover.
Figure 5–7: Exposing the Probe Body
b. Hook up test-signal source:
HConnect the high-amplitude output of a calibration generator,
through a 50 W precision cable to the input of a tunnel diode pulser.
See Figure 5–8.
HConnect the output of the tunnel diode pulser through a 10X
attenuator to CH 1.
HSet the triggering level of the tunnel diode pulser to minimum.