Radio Shack 21-533 Marine Instruments User Manual


 
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If you have an amateur radio, select the continuous
wave (CW) or tuning mode to check the field strength.
4. To measure field strength, as the helper continues to hold
down the transmit key, move to the marked spot on the
circle due north of the antenna, then watch the meter’s
needle.
Note the reading on the FIELD STRENGTH scale and
place a dot on the template on Page 11 corresponding to
the reading at that point.
In this example, the needle shows a 4 on the FIELD
STRENGTH scale. Place a dot where the spoke repre-
sentating the path you walked from the center of the circle
intersects the circle marked with a 4 on the template.
Dot
You are Here
Direction of Travel
21-533.fm Page 15 Thursday, August 5, 1999 3:47 PM