Bird Technologies 4527 - Manual (Page 19)

7
Figure 5 Percent Reflected Power vs. VSWR (1.0 – 8.0)
Low Reflection Measurements
φ = 10% (ρ = 2) is the typical limit of antenna match. Further effort is frequently
not worthwhile because below this level reflected power is hard to measure,
and W
l
can not be significantly increased. TV and VHF transmitters are examples
of systems requiring lower reflected power but for reasons other than maximiz-
ing power transmission.
CAUTION
For low reflection measurements, do not rotate the reflected power element
to read forward power. Damage to the element or wattmeter could result