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760A / 760D / 760N
3–1
Section 3
Installation
At installation time, save the shipping carton and packaging materials for
repackaging in case shipment becomes necessary. See Repackaging for
Shipment in SECTION 6, MAINTENANCE, for repackaging instructions.
Electrical Installation
This instrument is intended to operate from a single–phase power source having
one of its current–carrying conductors at or near earth–ground (the neutral
conductor). Only the Line conductor is fused for over–current protection.
Systems that have both current–carrying conductors live with respect to ground
(such as phase–to–phase in multiphase systems) are not recommended as power
sources.
WARNING. For your protection and to avoid damage to the instrument, unplug
the instrument power cord before removing or replacing any circuit boards,
connectors, or jumpers.
The 760A / 760D / 760N Stereo Audio Monitor operate over a frequency range
of 48 to 66 Hz, at any mains voltage between 90 VAC and 250 VAC. These
newer versions of the 760–Series instruments do not require any internal changes
to select their operating voltage range.
The 760A is factory set so that a specific level applied to each input will indicate
a specific level on the bar graph scale (see Table 3–1). While this required input
level may be changed for the standard 760A, the 760D and 760N are constrained
to use only the factory set levels.
Table 3–1: Factory Set Input Sensitivity
Instrument Type Input Level Bar Graph Readout
760A +8 dBu 0 dB
760D +6 dBu 0 dB
760N +6 dBu +6 dB
Unpacking
Power Source
Mains Frequency and
Voltage Ranges
Changing Input Sensitivity
(Standard 760A only)