Rane FVL 22 - Manual

OPERATING / SERVICE MANUAL FVL 22
REMOTE VCA / LIMITER
QUICK START
Welcome to the section for all too busy to actually read the manual. We provide this quick
start as a service to our best customers (the ones who buy the product.) Let’s get started…
There are two ways to connect audio to the FVL 22, #6 terminal strips or Patch I/O points. To
use the terminals, attach the balanced lines to the “+”, “–”, and SHIELD GROUND terminals.
To run the FVL 22 unbalanced, attach the positive lead to the “+” terminal and leave the “–”
terminal open. To use the FVL 22 as an external level control/limiter for a mixer or other device
with tip = send, ring = return insert points, simple use the PATCH I/O ¼" TRS jack. Note:
PATCH I/O is an unbalanced signal. Use two conductor cable with shield.
Install your remote control device (5k to 100k linear taper potentiometer, voltage ramp, or
switch) and run two or three wires to the FVL 22. If you are using an external voltage, run one
wire per Channel to the V1 terminal for Channel 1, V2 for Channel 2, and a ground wire to
COMMON GND. To use the provided 10VDC reference, connect a second wire from VREFl or
VREF2 to your pot or switch. Refer to the wiring diagrams on the back page of this manual.
The VCA’s in the FVL 22 provide maximum attenuation of the signal level when a given
voltage is detected between Vl or V2 and COMMON GND. Reducing this voltage with a pot,
ramp, or switch increases the audio signal level. (0 volts or open = VCA full on.)
To calibrate: set the remote pot, ramp or switch to it’s maximum voltage. Adjust the VOLT-
AGE CALIBRATION control until the green CAL indicator is lit.
Rotate the LIMITER threshold control to the level you never wish to exceed at the output.
The AUTO-SLAVE switch position locks the limiter control circuitry for stereo applications,
limiting both Channels equally when either Channel goes into limit.
Upon completion of the setup procedures, use the supplied hole plugs to prevent unautho-
rized adjustments.
Never connect anything except an approved Rane AC Power supply to the thing that looks
like a red telephone jack on the rear of the FVL 22. This is an AC power input and requires
special attention if you do not have a power supply exactly like the one originally packed with
your unit. Rane models FRS 8, RAP 10 or VC 18 power supplies are acceptable as well. Please
see the full explanation of power supply requirements elsewhere in this manual.
SYSTEM CONNECTION
When connecting the FVL 22 to other components for the
first time, leave the power supply for last. This allows for
mistakes to be identified by visual inspection and corrected
before power is applied and it becomes too late.
INPUTS and OUTPUTS on the FVL 22 are connected
via terminal strips or the PATCH I/O jack. Using the termi-
nals, attach the balanced lines to the “+”, “–”, and SHIELD
GROUND terminals. To run the FVL 22 unbalanced, attach
the positive lead to the “+” terminal and leave the “–”
terminal open. To use the FVL 22 as an external processor for
a mixer of other device with tip = send, ring = return insert
points, use the PATCH I/O ¼" TRS jack with a two conductor
shielded cable (the PATCH I/O is unbalanced).
EXTERNAL VCA CONTROL . The VCA’s in the FVL
22 provide maximum attenuation of the signal level when a
voltage is detected between V1 and V2 and COMMON GND.
Reducing this voltage with a pot, voltage ramp, or switch
increases the audio signal level. (0 volts or open = full VCA
on.) This voltage is provided by the VREF terminal on the
FVL 22 or derived by existing voltage sources at the remote
device location. Refer to the wiring diagrams on the last page
of this manual.
POWERING UP. A good visual inspection often elimi-
nates disasters before applying power. It cannot be overstated
how important it is to use the correct power supply with this
and all Flex products. The RS 1 single AC power supply
(included with each module) as well as the Rane FRS 8, RAP
10 and VC 18 power supplies are the only supplies certain to
work properly with the unit. If another supply is considered, it
must be an AC supply. It must have an 18 to 24 volt center-
tapped output and be wired to a 6-in mod connector in
accordance with the requirements of the Rane standard.