DRAKE ALT72, Инструкция по эксплуатации

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Installation, continued 5
Switch to 'ON'
3. Connect the Transmitter to Power
Plug the DC power cord of the supplied AC Adapter into
the DC INPUT connector on the rear panel of the
ALT 72 unit. Plug the AC Adapter into a nominal
120 VAC, 60 Hz wall outlet. Set the rear panel
POWER switch to the ‘ON’ position.
4. Set the Operating Frequency
Determine a frequency in the range of 72.1 - 72.9 MHz,
74.7 MHz, or 75.3 - 75.9 MHz that is not active in your
area. Use one of the supplied MR306 receivers to
monitor the intended frequency. Refer to the CHAN-
NEL (0-9) / FREQUENCY (MHz) chart in this manual
and on the bottom of this unit and press the "+" or "-"
button on the channel switch as required to set the
desired channel (operating frequency). A receiver set
to the same operating frequency should become quiet.
ALT 72 ASSISTIVE LISTENING TRANSMITTER
INPUT LEVEL
7
+
OFF L C+L
CHANNEL POWER MODULATION LIMITING/
COMPRESSION
1
0
2
3
4
5
6
7
8
9
10
5. Set the INPUT LEVEL Control
With the audio source active, and the desired type of
limiting set, adjust the INPUT LEVEL control clockwise
until the MODULATION LED indicator just begins to
light on audio signal peaks. Refer to the "Front Panel
Controls and Indicators" section of this manual
for details.
AC Adapter
Locating the Optional Magnetic-Mount Antenna
The optional magnetic-mount antenna is intended for
use with rack-mounted transmitters or in installation
areas where a remote antenna is needed for maximum
operating distance. For maximum signal strength, it is
best to locate the antenna somewhere within the
listening area. Generally, the higher the antenna can
be mounted above the listening area, the better.
Per FCC rules, only antennas supplied by the R. L.
DRAKE COMPANY may be used with this transmitter.
Installing the Remote Antenna
1. Remove the “rubber duck” antenna from the ALT 72
by turning it counterclockwise and guiding it through the
top cover.
2. Attach the optional antenna to the rear panel ‘EXT
ANTENNA’ connector. CAUTION: This connector is a
left-hand thread type. The mating connector on the
coaxial cable feed for the antenna tightens in a
COUNTERclockwise direction.
The mating connector on the coaxial cable
feed for the antenna tightens in a
COUNTERclockwise direction.
Magnetic-mount
Antenna
Antenna Coax Cable