<section id="frontend-properties">
<title>DVB Frontend properties</title>
<para>Tuning into a Digital TV physical channel and starting decoding it
- requires to change a set of parameters, in order to control the
+ requires changing a set of parameters, in order to control the
tuner, the demodulator, the Linear Low-noise Amplifier (LNA) and to set the
antenna subsystem via Satellite Equipment Control (SEC), on satellite
systems. The actual parameters are specific to each particular digital
- TV standards, and may change as the digital TV specs evolutes.</para>
-<para>In the past, the strategy used were to have an union with the parameters
+ TV standards, and may change as the digital TV specs evolves.</para>
+<para>In the past, the strategy used was to have a union with the parameters
needed to tune for DVB-S, DVB-C, DVB-T and ATSC delivery systems grouped
there. The problem is that, as the second generation standards appeared,
those structs were not big enough to contain the additional parameters.