Shure SCM810 User Manual page 15

Change MUTE IN to Inhibit
As supplied, a channel will mute when its MUTE IN terminal
is grounded. The mute function can be changed to "Inhibit" by
an internal modification for each channel. After the modifica-
tion, a logic "Low" at the MUTE IN terminal prevents that chan-
nel from gating on if it is off, but allows it to remain on if it is al-
ready on. IMPORTANT: To prevent high-frequency oscillation,
never connect a channel's GATE OUT to its own MUTE IN un-
less the "Inhibit" modification has been made.
Procedure: Short jumper X111.
Change OVERRIDE IN to MUTE IN for Use with Fili-
buster Mode
This modification should only be performed with the Change
MUTE IN to Inhibit modification described above.
Procedure: Short jumper X113. Remove resistors R1046
and R1058.
Change Off-Attenuation Level
This modification changes the off-attenuation level from -15
dB to a selected value. Select from the following resistor va-
lues.
Off-Attenuation Level
10 dB
20 dB
30 dB
Procedure: Remove resistors R9088 and R9145. Install
new resistor at jumper points X904 and X908.
Resistor Value
18 kΩ
50 kΩ
150 kΩ
15
Increase Hold Time
In addition to the dip switch SW702 options of 0.4- and
1.0-second hold time, the hold time can be increased to 1.5 se-
conds. (More than 1.5 seconds is not recommended.)
Procedure: Install a 470
X902. Move DIP switch down to 1.0-second position.
Decrease Hold Time
The hold time can be decreased from the factory preset of
0.4 seconds to 0.3 seconds. (Less than 0.3 seconds is not rec-
ommended.)
Procedure: Install a 2 MΩ resistor at jumpers X903.
Remote Control of Link Global/Local, Off-Attenua-
tion, Last Mic Lock-on, and Automatic/Manual DIP
Switches
If desired, these functions can each be remotely controlled
with an SPST switch.
Procedure:
1. Solder a wire in the pc board jumper hole adjacent to the de-
sired function (printed on the pc board). These jumpers are
located just behind DIP switch SW702.
2. Solder a wire in the pc board jumper hole marked "GND"
near switch SW702.
3. Set the desired DIP switch(es) to the Up position.
4. Run the jumper wires to the desired remote location and sol-
der them to an SPST toggle switch. The wires can exit the
SCM810 chassis above the DIP switches. Shorting any wire
to the Ground wire will set the function(s) to the correspond-
ing switch "down" position.
resistor across jumper points
kΩ