
THE RADAR SYSTEM - OPERATIONAL CONTROLS
249
It cannot be stressed too strongly that the way in
which the performance signals are displayed, and the
extent to which they monitor the performance, vary
considerably from manufacturer to manufacturer and
even with different types made by the same company.
Thus the important basic rule for carrying out a per-
formance check is: Consult the
maker's manual
and follow
exactly the
instructions given
therein.
A performance check should be carried out as soon as
practicable after setting up and thereafter at regular
intervals. In the United Kingdom the Department of
Transport in Notice Ml 158 (see Sectio ...