1705A Spectrum Monitor 3-1
Section 3Installation
The shipping cartonand pads provide protection for the instrument during
transit, and should be retainedin case subsequent shipment becomes necessary.
Repackaging instructionscan be found in Section 6 (Maintenance) of this
manual.

ElectricalInstallation

This instrument is intended to operate froma single-phase power source having
one of its current-carryingconductors at or near earth-ground (the neutral
conductor). Only the line conductor is fused for over-currentprotection.
Systems that have both current-carryingconductors live with respect to ground
(such as phase-to-phasein multiphase systems) are not recommended as power
sources.
The 1705A operatesover a frequency range of 48 to 66 Hz, at any mains voltage
between 90 Vac and 250 Vac. These newerversions of the 1705A instruments
do not requireany internal changes to select their operating voltage range.
The slide switch located on the 1705A rearpanel, between the input connectors,
enables/disablesthe +18 V supply on the L--BANDconnector. See Figure 3-1.
This supply,when switched on, is intended to provide power for a Block Down
Converter (LNB), through the L--BANDINPUT connector.
Packaging
Power Source
Mains Frequency and
VoltageRanges
+18 VoltsFor Block Down
Converter