10
English
Mute Control Connections
For mute control, use either a latching switch or a momentary switch.
The total resistance of the cable run from the switch to the DFR22
should be less than 100 ohms.
Figure 15 shows an example of how to connect either a latching switch
or a momentary switch to the Control Input pins to mute an input or an
output.
MUTE CONTROL PIN CONNECTIONS
FIGURE 15
Gain Control Connections
For gain control, use either a potentiometer or two momentary switch-
es (one for gain up and one for gain down). If you want to have multiple
sets of gain controls acting on the same inputs or outputs, use momen-
tary switches connected in parallel. Figure 16 shows a typical connec-
tion between a potentiometer and the Control Input pins. Figure 17
shows a typical connection between two momentary switches and the
Control Input pins.
When using a potentiometer, the total resistance of the cable run
should be less than 100 ohms.
When using momentary switches, the total resistance of the cable run
should be less than 100 ohms.
NOTE:
As supplied, the DFR22 control pins are configured for use with
a 10 Kohm audio taper potentiometer. However, you can use the Po-
tentiometer Calibration Wizard in the DFR22 software to configure the
DFR22 for use with any 10 Kohm, 20 Kohm, 50 Kohm, or 100 Kohm
linear or audio taper potentiometer.
GAIN CONTROL PIN CONNECTIONS USING A
POTENTIOMETER
FIGURE 16
GAIN CONTROL PIN CONNECTIONS USING SWITCHES
FIGURE 17
AMX / Crestron Control Connections
You can connect an AMX or Crestron controller to the back panel
RS-232 port, using a Phoenix connector, or to the front panel RS-232
port, using a DB-9 connector. In either case, you only need to connect
three wires: send, receive, and ground. See page 8 for the pinout of
the RS-232 ports.
To access AMX/Crestron control codes for the DFR22, visit the DFR22
web page at
http://www.shure.com/mixers/models/DFR22.asp
.
Switch
(momentary or latching)
Ground
10k
W
Potentiometer
(Audio Taper)
Switch
(momentary)
Ground
Switch
(momentary)
Summary of Contents for DFR22AZ
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