Signal Strength Lndication; Special Search Feature - QUAD 66 Instruction Book

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Signal Strength lndication
SPECIAL SEARCH FEATURE
It is possible to store mono operation with a particular station by selecting mono
(pressing pause) and then pressing the sfore button for about 5 seconds. The
box around the preset position and the arrow appears as confirmation. lf
necessary, this can be done when initially tuning and storing the station.
To change a station previously stored as mono back to stereo, press pauseto
select stereo and then the sfore button to store it again.
The approximate signal strength is shown by the bar graph to the right of the
display. The more segments lit the stronger the signal and the better the tuner
performance. ldeally at least 6 segments should be lit for a good signal to noise
ratio (minimum background noise) with stereo transmissions. The diagram
shows the effect on the tuner performance depending on the number of bar
segments lit.
Top bar shows signal strength too high. This will degrade the
performance by overloading the input stages. Use an attenuator.
Middle four shows adequate to good signal strength.
Bottom three shows poor signal strength. Check aerial.
Select mono (to reduce noise in weak reception area).
For special tuning requirements eg; tuning into very weak stations, storing
stations which are not transmitting (provided the transmitting frequency is
known) etc, tuning can be carried out in 25kHz steps with the interstation mute
defeated. The display is limited to 50 kHz resolution therefore the search button
has to be pressed twice for each change in the display.
The tuner will automatically switch to this mode if during search it is allowed to
return to the initial start frequency without a station being stored, eg; if 90.00
MHz was displayed when self seeking was started (search < > pressed) then
if this frequency is again reached (displayed), withoul store being pressed, the
scanning will stop at 90.00 MHz and f urther pressing of the search < > buttons
will step through the tuning band in 25 kHz steps (two presses for each 50 kHz
display change).
The interstation noise will be quite severe as in this mode the automatic
interstation noise suppression circuit is switched off.
lf you continue to hold down the search < > buttons the stepping will occur at
three successively faster speeds; for the first few seconds slightly faster than
normal, then at a higher speed and finally at maximum speed. Therefore when
searching for a station by programme content (rather than by frequency) it is
advisable to release the search button at that moment so that the sound can be
used as an aid to tuning.
Once the required station orf requency has been found it can be put into the tuner
memory by pressing the store button. This switches the tuner back to the
normal search mode so if you need to tune-in further stations, in this way, you
will again have to switch the tuner to its stepping mode.
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