Rane FLM 82 - Manual (Page 4)

All features & specifications subject to change without notice. 520-113 MAY95 Printed in the U.S.A. on Recycled Paper
©Rane Corporation 10802 47th Avenue West, Mukilteo WA 98275-5098 TEL(206) 355-6000 FAX(206) 347-7757
The Aux signals may be picked up before or after the
Input level controls. The switches which determine the pick-
up points are located beneath the top cover of the unit and
require some disassembly to reach them. All FLM 82s are
shipped from the factory in the “pre fade” position. To
change, remove the screws securing the top and rear cover
(one piece) and carefully remove the metalwork. You will see
that the switches have directions printed on the PCB assem-
bly, directing your further actions.
MULTIPLE MODULES. As you have already learned,
the FLM 82 may be used in conjunction with other Flex
mixer modules to create a large system by utilizing the FLEX
BUS IN and OUT jacks on the rear of the unit. Each mixer
module in the system will place its Master and Aux mixes on
the respective buses internally and provide this information to
its FLEX BUS OUTPUT. When these signals are connected
to the FLEX BUS INPUT on a succeeding unit, they will be
combined in the next unit with any local program material
and the sum of the two will be available at the second unit’s
FLEX BUS OUT jack. When daisy chaining several Flex
mixer modules together, the Master Outputs of the last
module in the chain will contain the sum of all modules
before it. The Aux Output on this last module is not a sum,
though proper mixing and summing of Masters and Auxes
can be accomplished with a FMM 42 Master Module
CHASSIS GROUNDING
Rane Flex units are supplied with a rear or side
mounted ground-lift switch. The unit is shipped with this
switch in the “grounded” position, tying circuit ground to
chassis ground. If after hooking up your system it exhibits
excessive hum or buzzing, there is an incompatibility in
the grounding configuration between units somewhere.
Your mission, should you accept it, is to discover how
your particular system wants to be grounded. Here are
some things to try:
1. Try combinations of lifting grounds on units that
are supplied with ground lift switches or links.
2. If your equipment is in a rack, verify that all chassis
are tied to a good earth ground, either through the line
cord grounding pin or the rack screws to another
grounded chassis.
3. Units with outboard power supplies do NOT ground
the chassis through the line cord. Make sure that these
units are grounded either to another chassis which is earth
grounded, or directly to the grounding screw on an AC
outlet cover by means of a wire connected to a screw on
the chassis with a star washer to guarantee proper contact.
Please refer to Rane Note 110 (supplied with your unit
and available on request at no charge if you lose it) for
further information on system grounding.
IMPORTANT NOTE
OPERATING INSTRUCTIONS
Having read this manual in its proper order, you should be
convinced that the FLM 82 is a four stereo input line mixer.
The section on the front cover titled “SYSTEM CONNEC-
TION” has given you the ammunition needed to properly
connect the inputs and outputs as well as the FLEX BUS
interconnections. Now for some knob twisting.
The level of a stereo source connected to the #1 INPUT
jack on the rear panel is controlled by the Channel 1 concen-
tric LEVEL controls on the front. The inner knob is for
Channel A, the outer for Channel B. This is the only level
control available for controlling signals going to the FLEX
BUS OUT connector. For identical levels on Channel A and
Channel B, the knobs should be kept at the same position
relative to each other. If a different level needs to be set for
each input, the controls may be rotated separately. The
Channel 1 AUX SEND level controls operate the same way
and control the same source. AUX SEND A and B levels are
delivered to the Aux A and B Buses and forwarded to the
FLEX BUS OUT connector as well as to the tips of the A and
B AUX LOOPs on the rear panel. All four Input channels and
front panel LEVEL controls operate in the same fashion.
The MASTER OUTPUT A and B jacks on the rear have
another level control possibility. The concentric MASTER A
and B knobs set the final output level for these jacks.
When engaged, the STEREO/MONO switch on the rear
panel sums the MASTER OUTPUT A and B signals together.
This switch does the same thing to the AUX A and B signals.
It should be noted that the action of this switch does not apply
to the FLEX BUS outputs. They will remain independent in
either mode.
The AUX LOOPs are used to insert processing or effects
between the AUX SENDs and the MASTER OUTPUTs. Two
possible options will accomplish this feat. If you wish to
insert a Flex series equalizer such as an FPE 13 or an FME
15, all you need is a shielded stereo cable. Use this cable
between the AUX LOOP connector(s) on the FLM 82 and the
PATCH I/O jack on the equalizer. This one connection
accommodates inputs and outputs from both units. If you are
using a piece of gear built by someone rude enough to omit
this convenience, a cable with a stereo plug on one end and
two mono plugs on the other is required. The tip of the AUX
LOOP jack is “send” or “output” and the ring is “return” or
“input”. Connect the tip of the TRS plug to the tip of the plug
to be used as the input to the processor. Connect the ring of
the TRS plug to the tip of the processor’s output plug. All
sleeves should be tied together through the cable shields. This
slightly unusual cable is a standard product for most cable
companies. The SYSTEM CONNECTION section on the
front page of this document explains how to use the AUX
LOOPs as Aux Outputs.