User's Manual

Table Of Contents

Model 1150A DVOR

Rev. - November, 2008

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6-15

h. A c

alculated VSWR exceeding 1.20:1, then is cause to suspect that the frequency change has affected the

antenna tuning.

i. With the DVOR operational select Monitors>> Data>> Sideband Antenna VSWR screen and view the

sideband antenna VSWR readings.

j. The frequency change may have affected the resonant point of the antenna. Attempts to improve their

VSWR may not successful because the tuning stubs now appear to be cut too short.

k. If the problems discussed in steps h or j exist, then perform the antenna tuning procedures in the DVOR

Antenna Manual, P/N 570002-0001. If the VSWR of the antennas cannot be reduced to less than 1.20:1, it

may be necessary to replace the tuning stubs or the antenna positioning pieces to insure optimum operation

at the new frequency.