Manual-3
REAR PANEL DESCRIPTION
PRIORITY INPUT connector and MIC/LINE switch:
The balanced PRIORITY INPUT operates at line or mic level,
determined by the MIC / LINE switch. This Input accepts unbalanced signals, however, we do not recommend unbalanced
operation unless the source is within 3 feet [one meter]; then only connect (+) and (GND).
Note: the Priority Input is not
influenced by the AGC, Crossover, Output trims or Remote Level controls.
The gain range for MIC level Input is 30 to 60
dB. The gain range for LINE level Input is 0 to 30 dB.
PRIORITY ASSIGN port:
The state of the PRIORITY ASSIGN port determines Priority Input assignment to each of the
six Outputs. Assignment pins are active low with passive internal pull-up. Any combination of pins may be active at one
time. The select ALL pin is provided for convenience. To complete an assignment, the Output must be selected by the
PRIORITY ASSIGN port
and
Priority Detect must be active.
Note that if a combination of Crossover Outputs is used in
one zone, all Outputs serving the zone must be selected by the PRIORITY ASSIGN port.
Variations in wire type do not
greatly affect the performance of this port. However, 22-gauge stranded wire with a flexible jacket is recommended.
Unshielded multi-conductor cable is OK for shorter runs (less than 100 feet). For longer runs, we recommend shielded
cable.
LINE INPUT connector:
Connect a balanced line level source to the Line Input. The Line Input accepts an unbalanced
Input connected to (+) and (GND), but we do not recommend unbalanced connection unless the distance to the source is
less than one meter; then only connect (+) and (GND).
OUTPUT and REMOTE connectors:
are on single 6-pin Euroblocks, one set for each Output. Outputs are line-level,
balanced, and hopefully driving a balanced equalizer or amplifier. If not, keep cable lengths short and consult
RaneNote
110, “Sound System Interconnection”
located elsewhere in this manual.
Connections for optional wired Remote Level controls are provided for each Output.
Note: Remote Level controls do not
affect the level of the Priority Input.
Each port provides a 5 volt reference voltage (REF), a control voltage input (Vc) and a
ground reference. Gain control law is 50 mV/dB. See
Setup and Operation
, step 6 for details.
Chassis ground point:
A #6-32 screw is used for chassis grounding purposes. 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 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 ground-
ing pin or the rack screws to another grounded chassis.
3. Units with outboard power supplies, such as the DA 26, 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. If you are con-
necting the DA 26 Outputs directly to a power amplifier, be sure to connect a ground wire to the amplifier chassis.
Refer to RaneNote 110, “
Sound System Interconnection
” (supplied in this manual) for further grounding information.
Remote POWER supply input:
The DA 26 is supplied from the factory with a Model RS 1 Remote Power Supply suitable
for connection to this input jack. The power requirements call for an 18 VAC center-tapped transformer only.
This is not a
telephone jack. Never use a power supply with your DA 26 other than the one supplied or an exact replacement obtained
from Rane Corporation.
Using any other type of supply may damage the unit and void the warranty.
