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4
SS 4.1 Plus Installation and Operation Manual
DESCRIPTION
Product Description
The SS 4.1 Plus passively switches any one of four stereo inputs to a single stereo
output and is equipped with eight trigger inputs. Perfect for automation switching
and/or source selection. The passive switching utilizing gold contact relays, which
means that the unit can route a signal in either direction. Due to the passive nature
of the switching, any input level and impedance can be used. Inputs may be bal-
anced or unbalanced, while output levels, impedance, distortion, noise and balanc-
ing will match that of the selected input. In addition to their normal use with audio
signals, the unit can also be used to switch composite stereo audio, AES digital audio
signals, RS-232, 422 or 485 data signals and telephone lines.
Features
• Operational control by front panel switches with LED indicators, contact closures, 5-
volt TTL/CMOS logic levels and/or the multi-drop bi-directional RS-232 serial port.
• May be monitored and/or controlled via a web browser with the optional ESS-1.
• Plug-in euroblock screw terminals are provided for audio and remote control
connections.
• Audio switching via sealed relays utilizing 2-form-C bifurcated - crossbar silver alloy
with gold overlay contacts.
• Internal silence sensor monitors the output and is equipped with a front panel LED indi-
cator; SPST alarm relay and adjustable SS alarm delay and restore timing duration.
ª The “ACT” circuit performs as an audio output activity monitor with front panel LED
indicator.
• The “ENABLE” switch provides a safety lock to the front panel source selection
switches.
• The audio “MUTE” switch allows the user to turn off the audio output when activated.
• The “STEP” function allows the user to single step through each channel or to auto-
matically sequence with user programmed channel steps and speed.
• Eight remote inputs, user configured for remote control or “PIP” (trigger) inputs.
• Four open collector outputs provide remote channel status.
• Logic functions via flash microprocessor with non-volatile memory.
• The power-up feature allows the user to select which one source is active at power up,
including the last source selected.
• Configuration via dipswitches, serial port menu or burst mode.
• Source number one is configured to route audio to the output in the case of loss of
power to the unit.
• Non-selected sources are terminated with 10K W load resistors. May be removed.
• The SS 4.1 Plus may be set on a desktop, mounted on a wall or up to three units on
one RA-1 rack shelf.
Applications
Automation source switching with eight trigger inputs; Studio selection and routing;
Audio processing selection; Exciter input selection; Remote broadcast input selec-
tion; STL source selection; Multiple station program on-hold and/or PA switching;
EAS audio switching; ISDN or Phone hybrid feed selection; IFB selection; Satellite
audio channel switching and console monitor inputs and outputs selection.
