Rev. 1.0
FMX30/FMX100/FMX250 User’s Manual
2—2
You can install the FM transmitter in a standard component rack or on a suitable
surface such as a bench or desk. In any case, the area should be as clean and well-
ventilated as possible. Always allow for at least 2 cm of clearance under the unit for
ventilation. If you set the transmitter on a flat surface, install spacers on the bottom
cover plate. If you install the transmitter in a rack, provide adequate clearance above
and below. Do not locate the transmitter directly above a hot piece of equipment.
The FMX30, FMX100, and FMX250 operate on 100, 120, 220, or 240 volts AC (50 or
60 Hz; single phase). Each transmitter can operate on DC power as well (28 volts
for the FMX30, 36 volts for the FMX100, and 62 volts for the FMX250). The
transmitter can operate on lower DC voltage, but with reduced RF output power
(see section 1.2). In addition, the transmitter isolates the AC and DC sources; both
can be connected at the same time to provide battery backup in the event of an AC
power failure.
2.2.1
AC Line Voltage Setting
To change the voltage setting, follow these steps:
1. Disconnect the power cord if it is attached.
2. Open the cover of the power connector assembly using a small, flat blade
screwdriver. See Illustration 2–1, Removing the Power Connector Cover.
3. Insert the screwdriver into the voltage selection slot and remove the drum
from the assembly.
4. Rotate the drum to select the desired voltage. See Section 2.2, Power Connec-
tions.
5. Replace the drum and cover and check to see that the correct voltage appears
in the connector window.
6. Connect the AC power cord.
CAUTION
Possible equipment damage!
Before operating the transmitter for the first
time, check for the proper AC line voltage set-
ting and frequency described in Section 2.2,
Power Connections and Section 2.3, Frequency
(Channel) Selection.
