MOON AIR Analog FM Tuner
Front Panel Controls (continued)
The “Stand by/On” button disengages the output section from the rest of the AIR’s circuitry and turns
off the digital display. However, when in “Stand by” mode all audio circuitry remains powered up to
help maintain optimal performance. When switching back from “Standy by” to the “on” mode, all prior
settings, including the tuned FM radio station’s frequency, will be restored from the previous listening
session. The blue pilot LED will not be illuminated when the AIR is in “Stand by” mode.
The “Mute” button, when activated, eliminates signal noise between FM stations; When the signal
strength falls below the mute threshold, there will be no audible output from the tuner. This function
is highly recommended when changing/scanning stations, however, once you have selected a station,
it is recommended that you turn off the “Mute” function by simply pressing the button again. The
“Mute” indicator LED in the display window will illuminate when this function is active.
The “Mono” button alternates the AIR between stereo and mono output. Most FM radio stations
broadcast in stereo, and to achieve the best sound reproduction, you should operate the AIR in stereo
mode (the default setting). The “Stereo” signal indicator LED in the display window will confirm that
the station you are listening to is broadcasting in stereo. In the event that a particular FM station has
very noisy reception (ie. excessive background noise), it might be worthwhile to switch to the mono
mode by simply pressing the “Mono” button. At the expense of stereo separation, the mono setting
will capture less than half of the noise typically captured in stereo mode. When activated, the “Mono”
indicator LED in the display window will illuminate and the “Stereo” indicator LED will turn off. Pressing
the “Mono” button again will return the AIR to stereo mode.
The “BW 1/2” button allows you to select either a wide (BW 1) or narrow (BW 2) bandwidth setting for
the Intermediate Frequency section of the tuner circuit. The wide setting is recommended when
adjacent channel interference is not an issue. The narrow setting is preferable when adjacent channel
interference is a factor; this setting has less high frequency extension, but is less sensitive to noise and
interference from nearby stations. You should choose the bandwidth setting which best suits your
specific setup. The default setting is “BW 1”. When “BW 2” is selected, the “BW2” indicator LED in the
display window will illuminate.
The “Tuning” dial can be rotated either clockwise or counter-clockwise to select the frequency of the
radio station you wish to listen to. The three (3) LED array center tuning indicator located in the upper
right of the display window should be used as a guide to achieve a center-tuned position; When the
left LED illuminates, gently rotate the ‘Tuning” dial clockwise; When the right LED illuminates, gently
rotate the dial counter-clockwise. You’re precisely tuned into a station when the center LED illuminates.
Now you’re ready to fine tune the selected station using the vertical “Level” bar graph LED array,
located on the right side of the display window; The objective is to maximize signal strength and
minimize/eliminate multipath. This may require a very slight deviation from the precise center tuned
position; it may be necessary to sacrifice a higher signal strength to help eliminate multipath.
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Front Panel Controls
8
Содержание MOON AIR
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