6
Chapter 3 Installation
The Model 4391A RF Power Analyst is completely portable and very suitable for
field or laboratory use. Its power is derived from rechargeable nickel metal
hydride batteries inside the unit or from an AC outlet via the power cord
supplied with the device.
The batteries are shipped in a low charge state. It is, therefore, recommended that
you charge the instrument for 16 hours before using it for continuous operation.
Note: Battery charging at temperatures greater than 46° C (115°
F) can result in reduced operational time.
Operating on AC Power
For AC power operation, the Model 4391A is simply connected to an AC
receptacle using the line cord provided. The correct AC voltage is selected via a
rear panel switch (
Figure 5
). The meter may be operated in this manner with
the batteries removed if desired.
Figure 5 Rear Panel
CAUTION
Long-term storage of this instrument can affect battery
performance and reduce battery life. Do not store the
instrument for long periods of time without recharging the
batteries (refer to page 17). Failure to comply may result in
reduced battery charge and shortened battery life.
CAUTION
Always be certain the 115/230 voltage selector is set to the
proper voltage before AC power is applied.
Item No. Description
1 AC input voltage selector switch
2 Fuse holder
3 AC power cable connector
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