Harman Kardon Citation Fifteen Instruction Manual page 11

operates at 96.3 mHz. After locating this station through the use of
the frequency scale (between 96 and 98 mMz) the pointer may fall
on 42 on the logging scale. Make a note of this setting. For future
tuning to WQXR simply set the pointer to 42 on the logging scale.
TUNING METER
All FM broadcast stations are assigned a frequency by the Federal
Communications Commission. The signals from these stations extend
equally above (+) and below (—) the assigned frequency. The fre-
quency spectrum is called the "pass band"'.
The tuning meter of the Citation Fifteen (when centered) is tuned
to the exact center of the pass band. However, you may be detuned
slightly (either + or —) and still not experience degradation of the
quality of sound by remaining within the limits of the pass band. Only
when detuned enough to reach the edge of the pass band will the
signal become noisy, distorted and finally disappear.
It is important to note that it is NOT ALWAYS NECESSARY to
be tuned to the EXACT center of an assigned pass band to obtain
clean, undistorted sound.
QUIETING METER
"Quieting" is a term used in the measurement of the relative signal-
to-noise ratio of a broadcast signal.
Conventional signal strength or center channel meters do not in-
dicate the quality of the received signal — simply their strength and
pass band accuracy. Harman/Kardon's extraordinary QUIETING
METER actually indicates or 'reads' the signal-to-noise ratio or
the QUALITY of the received signal.
Maximum deflection of this meter (highest number) represents the
best listening point within the pass band EVEN IF THE TUNING
METER IS NOT AT THE CENTER OF THE PASS BAND.
As you detune closer to the edge of a station's pass band, the
QUIETING METER will immediately reflect the increased noise and
distortion.
The QUIETING METER will "ALWAYS" agree with what you hear
and will "ALWAYS" indicate the best tuning point.
10
PWIETING
ANTENNA ORIENTATION
MULTIPATH
However, since multipath signals always increase background noise,
the QUIETING METER may be used to tune both the Citation Fifteen
and your antenna to eliminate or drastically reduce multipath inter-
ference.