T.E.M. A07B500S, Руководство пользователя

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A07B500S manual
Pag. 22
4.6.7
By entering the right combination and then ENTER, the first setting of the
transmitter is accessed:
In this screen shot i the maximum value of the direct power setting can be changed by the keyboard
with the limit of 500W, this to avoid to drive an eventual following amplifier, which could bear an
input maximum power of few Watts, with an excessive power and harmful consequences; therefore
in this screen shot output power
can’t be adjusted , but a remedy is taken to solve a quite common
error in the output power adjustment of the exciter-amplifier systems.
The change and entry of new data may be performed by pressing the horizontal and vertical cursors
and the ENTER button.
4.6.8 E ntering instead PAGE UP, the following screen shot is accessed:
In this screen shot, like in the previous one, it’s possible to set the higher limit of the allowed
maximum reflected power. If the set limit tends to be exceeded, for a bad antenna operation or a bad
load connected to the RF connector, the direct power is reduced proportionally so that this limit
won't be exceeded, thus protecting the RF power final mosfet. Usually the reflected power limit is
set to a value equal to 10% of the set direct power. Therefore, if the output power is adjusted at
450W, the reflected one can be 45W.
The higher limit of this parameter is 50W and the resolution is 1W.
4.6.9 By entering PAGE UP, the following screen shot is accessed: