SONOSAX SX-PR (by Gary J. Louie) - Manual (Page 5)

1.0 volts.
MODULOMETER (LEDs) - audio level meter which shows the level of the left and right
main outputs in DIRECT mode, or the level of the tape inputs in TAPE mode. Range is
from -20 dB to +6 dB. Levels under 0 dB are shown in green, over 0 dB are shown in
red. Response characteristic is selectable internally for peak or VU (factory set for peak).
When the modulometer shows 0 dB, main outputs are +6 dBu, assuming that the rear
output level selectors are at the normal 0 dB setting. The modulometer can be internally
selected to show the signal PRE headphone monitor section or POST headphone
monitor section (factory set for PRE). When in BATT TEST mode, the left modulometer
channel becomes the voltage indicator.
LIMIT (LEDs) - one indicator LED for each channel's limiter. Shows when each limiter has
been activated by a signal over 0 dB as indicated on the modulometer. This activation
level is internally adjustable.
ADJUSTMENT OF MODULE POSITIONS
The mixer's modular construction allows repositioning of the modules to the operator's
preference. The input modules and master module may be positioned in any order. The
entire mixer is held together with four main outer rods, holding the end plates, and two
smaller internal rods which maintain module alignment. Another large rod serves as the
hinge for the cover doors. Note that all of these rods are length-specific for each model
of mixer (SX-PR2, 4, or 6). If you add or subtract modules, you must use the correct
length rod set.
Remove all connections to the mixer and remove the batteries. Remove the shoulder
strap from the end plates with a 2mm hex driver.
Using a 2mm hex driver, unscrew the four hex drive screws at each corner of the end
plates. Be careful not to lose the flat washers under each screw head and under the
end plate on each screw.
Remove the Phillips head screw in the middle of the end plates.
Remove the end plates and the four corner support rods, being careful not to lose the
four washers on each end of the main corner rods.
Remove the doors and door hinge rod, which fits into recesses in the end plates. Do not
lose the plastic flat spacers between each door. Remove the rubber door bumper strip.
You may separate the modules straight apart. The two internal guide rods will become
visible as the modules are separated.
Each module is interconnected electrically with a 10 pin header. Each module has a
female header, and a removable pin assembly sits in between each module.This pin
assembly may stick to the module on either side as they are separated. The pin
assembly may be plucked out after the modules are separated, and used between each
module in your desired configuration. Obviously, no pin assembly is used at the outsides
of the outer modules, at the end plates. You may find it easier to remove modules if you
remove the internal guide rods as they become visible. Be careful, since now the only
intermodule support is from the electrical connectors.
For reassembly, configure the modules in the order desired. Place an electrical pin
assembly between each module, and home them together. Insert the two small internal
guide rods into the proper guide holes. Note that the slightly shorter small rod goes in
the hole where the end plate Phillips screws will also go. Replace one end plate first,
then insert the doors and hinge rod, and the rubber bumper strip. Then align the last
end plate and fasten.
INTERNAL ADJUSTMENTS
The internal adjustments on the master module are:
Charging Jumper (factory connected). Connect only when using rechargeable batteries.
In this mode, charging current is sent to the rechargeable batteries (accumulators)
whenever external power is applied, even when the power switch is off. Disconnect when