Controls - BRUEL & KJAER 1022 Instructions And Applications

2...
CONTROLS
Fig.2.1.
FRONT PANEL
POWER:
POWER FREQUENCY BEAT:
6
Front Panel
On/off switch for mains supply.
Pushbutton. When depressed and held
in, a beat between the power supply fre-
quency and the output frequency of the
B.F.O. can be observed on the meter.
By this means the output frequency can
be calibrated with the main frequency
scale.