Hafler IRIS - Manual (Page 13)

Remote V/B
Resolution
Record Security
and Umbilical
systems
Note: Which V/B knob-set is in command is unaffected by ANY
KEYS-remote or preamplifier. It depends ONLY in where the
LAST V/B command came from (including the effects of pream-
plifier power-up discussed earlier).
CAUTION:
Since the IRIS remote is fun for many adults, it is likely that small
children will also find it so. After a system turn-on, the REMOTE
knobs may not be set where you left them at last listening. If you
then TOUCH either remote knob, you may suddenly have a lot
more level than you expected!
Your instinctive reaction of quickly reducing the remote VOL-
UME setting will take this level down very quickly. However, in
such situations, a better approach is to use a remote KEY to
either (-20dB) MUTE the system, or select an unused or dead
input-BEFORE TOUCHING either remote knob then restore
the remote VOLUME control to normal level and operate as
usual.
The preamplifier’s CYBER-OPTIC level-control system has
essentially infinite resolution-as no digital steps are used. In the
remote V/B transmission mode IRIS employs 8-bit or 256-step
format to obtain resolution essentially indistinguishable from
preamplifier panel operation. For VOLUME, the command
step-size is approximately 0.25dB, increasing in the deep-
cutoff region. For BALANCE, the command step-size is typically
0.1dB.
Engage either RECORD 1 or 2 on your preamplifier. You will
find that most of your remote KEY functions are not being
accepted at the preamplifier, but VOLUME BALANCE, MUTE
AND NORMal are working as usual. This unique IRIS feature
allows you to retain convenient remote control of those functions
which come AFTER the RECORD OUTPUT jacks in the
preamplifier signal path, but keeps you from accidentally input-
ting any commands which would spoil your recording process.
An INTERRUPTED flashing of the preamplifier’s MUTE indica-
tor tells you which functions it will not accept during this safety
mode.
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