Description Of Controls - Racal Instruments 9916 Workshop Manual

DESCRIPTION OF CONTROLS
POWER 0NiOFF Switch:
RESOLUTION Switch:
OPERATf/STANDBY Switch:
FUNCTION Switch:
9916 Vol. 2
NOTE: The switch function is related to the
setting of the rear panel LINE POWER/CHARGE
BATTERY POWER swUch.
Power ON Position
The instrument will operate from either line
power or optional battery supply as selected by
the rear panel LINE POWER/CHARGf!BATTERY
POWER switch. When CHARGE is selected the
Power ON position will give full-rate battery
charging.
Power OFF
In the OFF position the charging and operating
facilities are switched off, irrepective of the
type of power supply.
This four position switch selects the appropriate
gate time from the time base to give the
required resolution. Generally, the switch will
be set so that the measurement just fills the
display. The display units are shown by the
Units Indicators.
OPERATE is the normal signal measurement
mode.
STAN DBY perm its use of Battery Economy
operation or Standby operation (see
paragraphs 2.6 and 2.7) accord i ng to the
setting of the LINE POWER/CHARGE/BATTERY
POWER switch. The internal frequency standard
remains powered when STANDBY is sel·ected.
NORMAL provides continuous measurement
with
automat~c
updating of the display.
BURST provides a single shot reading from
either
cm
intermittent or continuous signal.
2-4