Adcom GTP-740 - Manual (Page 8)

Headphone jack: This accepts the stereo 1/4” phone plug connector used by almost all high
quality headphones. When you use the headphone jack, the GTP-740's rear panel main line
level Preamp outputs are muted. Room 2 outputs are unaffected.
Power Button and LED: Use this button to turn your GTP-740 on and off. When you first push
the Power Button to the ON (depressed) position, the center LED will glow yellow until all
circuitry stabilizes. When your GTP-740 is ready to use, the LED will turn red.
NOTE: The front panel Power Button must be engaged to use the remote control. If the front
panel Power Button is not depressed, the remote control will not have any effect. When the front
panel Power Button is engaged, the remote controller’s “Power” button will cycle your GTP-740
between standby and operation modes. When in standby mode (indicated by the yellow LED),
you need to press the remote control’s “Power” button to activate your GTP-740’s circuitry. (The
LED will turn red when you do this.)
Surround Mode button and LED indicators: Pushing the button sequentially steps your GTP-
740 through all the available operatinig modes linked to the selected input.
For example, if you have chosen the DVD input (a digitai input), the Surround Mode button will
step through Dolby Digital, Dolby Digital/Cinema. and Dolby Digital/2-chan. stereo. The LED
immediately to the right of the selected Operating Mode will indicate the current choice. The
Operating Mode button will automatically bypass choices not applicable to the DVD input.
In a similar manner, the Surround Mode button will step through Dolby Pro Logic/CInemaJDolby
Pro Logic, symphony hall, stadium, jazz club, 5-chan, stereo, and 2-chan, stereo sequentially
when you’ve selected the CD input. Since no CDs can carry a Dolby Digital (AC-3) signal, that
choice is not available.
Dialog Enhance button: A shelving filter with a comer frequency of 7 kHz that reduces the often
excessive high frequencies on some movie soundtracks that make them fatiguing to listen to.
Dynamic Range button and LED indicators: This button, usable only with a Dolby Digital
source, incrementally reduces theaudio track’s dynamic range in four steps (full, 75% , 50%>, and
25%) to allow comfortable listening under a wide variety of conditions. The normal, or default,
position is full.
Although we usually prefer to reproduce a source’s full dynamic range (the difference between
very loud and very soft sounds), we occasionally need to reduce dynamics. For example, when
playing a movie late at night, loud explosions might wake sleeping family members. Simply
turning the volume control down would probably make a whisper in the next scene inaudible. The
Dynamic Range button solves this dilemma by progressively lowering the volume of loud peaks
while increasing the level of softer sounds. This allows you to hear every element of the
soundtrack without disturbing those around you or forcing you to strain to hear delicate nuances.
Display window: This shows all the pertinent information you will need to effectively use the
GTP-740 on a daily basis. We carefully designed this window to display only the data you need at
the time you need it. The window’s configuration will change as you ask the GTP-740 to do
different things. The display normally shows the input you’ve selected. If you’re currently listening
to AM or FM radio, the display shows that signal’s frequency. Additional Information appears as
needed and we’ll note these appearances in subsequent sections of this manual.
Tuner preset buttons: These buttons (and the Shift button: see # 8 immediately below) allow
quick access to up to 14 preselected AM or FM broadcast frequencies.