Rane SM 26B (1999 version) - Manual (Page 3)

Manual-3
REAR PANEL DESCRIPTION
ቢ LEFT & RIGHT MASTER INPUTS are balanced Tip-Ring-Sleeve (TRS) ¼" Inputs. These Inputs feed all six MONO
OUTs when all MONO INs are not used. Connecting to individual MONO INs disconnects that channel from these Inputs
(refer to the Block Diagram found on the SM 26B Data Sheet). For unbalanced operation use a standard mono ¼" plug; for
balanced operation use a TRS (stereo) ¼" plug wired as follows:
TIP is signal + (connect to Pin 2 on a 3-pin connector).
RING is signal - (pin 3 in a 3-pin connector).
SLEEVE is chassis ground.
ባ LEFT & RIGHT EXPAND OUTPUTS: ¼" TRS jacks that are connected in parallel with the Master LEFT & RIGHT
INPUT jacks, allowing two or more SM 26Bs to be daisychained for multiple splitting. Simply connect these EXPAND
OUTPUTS to the LEFT & RIGHT INPUTs of another SM 26B; there is no limit to the number of expansions possible
with the SM 26B.
NOTE: These Expand Outputs are not buffered from the Master Inputs. Therefore it is not possible to mix both
balanced and unbalanced lines in the same channel between several units: once the ring and sleeve are shorted anywhere in
the chain (by using a mono plug) the entire line becomes unbalanced.
ቤ MONO INPUTS are TRS ¼" jacks which accept either balanced or unbalanced mono signals. These are switching jacks
which automatically bypass the Master LEFT & RIGHT INPUTs whenever a plug is inserted (see the Block Diagram).
Follow wiring conventions as in #1.
ብ MONO OUTPUTS: ¼" TRS jacks deliver either a conventional unbalanced output (use mono cords), or a balanced output
(use TRS cords). Follow wiring conventions as in #1.
ቦ LEFT & RIGHT MIX OUTPUTS: These balanced TRS ¼" outputs are controlled by the MASTER OUTPUT LEVEL
control. They are fed either by the Master LEFT & RIGHT INPUTS (respectively) or by any of the six MONO INPUTS,
or a combination of both (Rane Note 108 helps). Follow wiring conventions as in #1.
ቧ Remote power supply input: The SM 26B is supplied from the factory with a Model RS 1 Remote Power Supply suitable
for connection to this input jack. The power requirements of the SM 26B call for a 18-24 volt AC center-tapped transformer
only. This is not a telephone jack. Never use a power supply with your SM 26B other than the one supplied or a Rane
approved replacement.
ቨ Chassis ground point. A #6-32 screw is used for chassis grounding purposes. See the CHASSIS GROUNDING note on the
next page for details.