Plessey PRC 320/1 - Battery Check; Frequency Check

BATTERY CHECK
5.5
Check the charge state of the battery as
follows:-
5.5.1 Set the transmitter power switch to
BATT CHK and the mode selector switch to the CW
position.
5.5.2 Depress the pressel or the morse key
and check that the meter needle registers on or
above the second mark on the scale (the first
mark is zero). Release the pressel. If the
needle was below the second mark, replace the
battery.
5.5.5 Tune the antenna as described in
Chapter Two (Page 20) and recheck the РУМЕ
as described above.
FREQUENCY CHECK
5.4
The operator can check the frequency accuracy
of the RT320/1 by comparing its frequency with that
of either а laboratory frequency standard or a
Standard frequency broadcast. The check procedure is
as follows:-
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5.4.1 Set the mode selector switch to the CW
position. Set the frequency of the RT320/1 to
that of the check station, ensuring that the
latter is transmitting CW only so that а pure
tone is heard in the headset. (Any other mode
of transmission from the check station might