44 | Calibrating the Model 3301C
3. Insert the mounting stud
on the back of the
3301CAL into the
Model 3301C rod
element mounting hole.
Rotate to tighten.
4. Connect the 3301CAL ground to one of the counterpoise mounting
screws on the Model 3301C.
5. Place a signal source on the signal generator port of the 3301CAL and
a receiver on the receiver port.
6. Terminate the output of the Model 3301C with 50 Ω, and record the
input signal strength.
7. Compensate for test fixture and effective height of antenna: The
receiver port on the 3301CAL has a 5 db loss in signal strength from
the mounting stud due to the resistor network in the fixture. In addition,
the effective height of the 1.04-meter monopole is 0.5 meters; this
adds a 6 db correction factor, making the combined correction factor
11 db.
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