Hafler IRIS Owner's Manual - (14) Mono
needed, to cancel the noise deriving from the separation
information, carried totally on the subcarrier.
In nearly all cases, such progressive channel blending,
applied only on weak signals, results in a far more listenable
overall situation. The IRIS noise-reduction circuit has no
effect on stronger signals, thus we have configured the
BLEND OFF switch
(13)
so that its normal OUT position
results in this system being “armed”--ready to act on a
temporary signal fade--but taking no action on signals
strong enough for quality stereo reception.
(14) MONO
The MONO switch is provided to allow forcing reception to
stay in MONO mode. It is rarely used, as the stereo FM
multiplex decoder operation automatically switches to
MONO mode if the incoming FM signal is not in stereo.
The MONO mode can sometimes improve reception of a
very distant or fluctuating station--i.e. when
etc.
The green STEREO legend
(20)
lights only when the MONO
switch is OUT and when the detected FM multiplex subcar-
rier (19 kHz pilot frequency) is sufficiently strong to activate
the multiplex decoder’s stereo circuitry.
REMOTE CONTROL
You should re-read the remote section of the IRIS
PREAMPLIFIER manual in conjunction with the following
additional information.
HANDSHAKE SYSTEM
The umbilical connection established allows a very con-
venient “HANDSHAKE” operation between the two units. In
simple terms, your IRIS Tuner tells your IRIS Preamplifier
that it is connected and powered. This tells the
Preamplifier, when Tuner is selected, to automatically
“transfer” the remote’s top eight (multi-legend) keys to
perform TUNER command functions.
The Preamplifier also tells the Tuner it can drop its audio
muting, and the associated red MUTE legend (19).