Manual

F760X-RS Compressor-Limiter-Expander
***Verify proper mains voltage setting on fuse drawer of power inlet before applying
power. If you are unsure how to do this, contact your dealer or Q2 Audio directly at:
[e-mail]***
Operation Procedure: Quick Start
This is the ADR recommended set-up procedure to get the audio levels set up properly.
a). Verify that the EXPANDER section is switched ‘OFF’; COMPRESSOR 'RATIO' switched to
1:1 (non-operative); the PEAK LIMIT switched ‘ON’ (or 'PRE.EMPH' if your application will
require de-essing); and the channel OUTPUT control turned down. When operating in stereo,
it is recommended that the stereo controls be set to approximately the 3:00 position otherwise
they can be left fully clockwise. This is to allow some up/down stereo level adjustment if
required at a later time.
b). With the SYSTEM bypass switch to ‘OUT’ (i.e. by-passing the F760 vari-loss amp section)
the audio levels to/from the F760 should be established in the usual way as though the F760
were not in the signal path. The audio level should be peaking to at least -10dBm, but
preferably to 0dBm in order to obtain maximum compression possibilities.
c). Having established the normal level, switch the F760 SYSTEM bypass to ‘IN’ and adjust
the channel INPUT control until the overall amount of gain reduction likely to be required is
indicating on the meter (example: 8dB). At this stage the Peak Limit section is working and
red indicator will be flashing.
d). Turn up the channel OUTPUT attenuator and adjust so that the level is peaking to the
same level as the direct signal. This is best done under dynamic signal conditions rather than
on tone if monitoring with VU meters. A relevant direct comparison is now available between
direct and compressed signal at the flick of the SYSTEM ‘IN' / 'OUT’ switch at closely
approximating peak levels.
e). With the COMPRESSOR 'RATIO' control select the ratio required (e.g. 2:1) and adjust the
COMPRESSOR 'THRESHOLD' control until the red LIMIT LED only indicates on peaks above
the amount of compression required (move the threshold down from ‘0’ towards the -20 point
until the red LIMIT LED goes out, then come back one position. The PEAK LIMIT section will
then operate on any further unexpected increase in level. The amount of compression may be
changed by increasing/decreasing the channel INPUT control and adjusting the compressor
threshold to adjust the relationship between compression and peak limiting. Once set-up it will
not be necessary to alter the channel OUTPUT level (as per step ‘d’).