OTARI RADAR II, Operation Manual, Page: 210 / 261

A.2.5
AC Power Level Setting
CAUTION!
It is extremely important when first hooking up
RADAR II that, before the unit is powered up, the
line voltage selector switch is set to the correct
position. If this switch is set incorrectly, extensive
damage to RADAR II's internal circuitry may occur!
RADAR II has a universal power supply that will accommodate AC voltages and
frequencies as provided anywhere in the world. The standards used by different
countries fall in either of two ranges - 100 to 120 volts at 50/60 Hz or 220 to 240
volts at 50 Hz. A switch on the back panel of RADAR II determines which of these
is to be used to provide power.
PLEASE CHECK the AC voltage setting on the back panel for the proper line
voltage for your area! If you set this incorrectly, poor system performance (and/or
smoke) may result! If the voltage setting is incorrect, use a flat-blade screwdriver to
change it:
A.2.6 Grounding
The analog audio circuitry in RADAR II operates with a separate ground, which is
not connected to the AC power ground. This allows the user to determine the
grounding scheme that best suits their studio’s requirements.
There are two terminals on the back panel of RADAR II where these grounds are
broken out. The chassis ground (CHS GND) is connected directly to the metal
chassis and the ground wire of the incoming AC power line. The analog ground
(ANA GND) is connected to the sleeve of each audio input and output including
the SMPTE In and Out.
RADAR II is shipped with the ANA GND and the CHS GND disconnected.
When grounding problems do occur such as hum or excessive crosstalk, the ANA
GND and CHS GND may be strapped together with a short piece of wire, or the
analog ground may be connected to the technical ground shared by the other audio
gear in the environment.
H A R D W A R E / S O F T W A R E I N S T A L L A T I O N A-3
Edition 1