Allen&Heath iDR-4 - Manual (Page 28)

28 IDR-4 User Guide
TRS Jack Inputs and Outputs
TRS Inputs
Physical inputs 3 to 6 are available on
balanced TRS jack sockets wired tip hot (+), ring cold (-) and
sleeve ground. To use these with unbalanced equipment link
the ring to the sleeve. Line level signals between -18dBu and
+12dBu may be connected.
Note that inputs 5 and 6 can be re-configured using iDR
System Manager software to become the stereo monitor ‘ripple
through’ L and R inputs.
Setting GAIN Open on the Source window to access the
gain control. With audio active adjust the control so that the
meter averages around ‘0’ with loudest peaks no more than
‘+10’. The gain control steps are -12, -6, -3, 0, +3, +6, +12,
+18dB.
TRS Outputs
Physical outputs 5 and 6 are available on
balanced TRS jack sockets wired tip hot (+), ring cold (-) and
sleeve ground. To use these with unbalanced equipment link
the ring to the sleeve. Maximum level available is +18dBu.
Decide the normal operating level according to headroom
required. Typical level is 0 or +4dBu.
Note that outputs 5 and 6 can be re-configured using iDR
System Manager software to become the stereo monitor L and
R line level outputs.
Configuring the Stereo Monitor
The factory default configures the iDR-4 as a 6 in, 6 out system
without monitor. This is regarded as the most typical
application. If, however, the stereo audio monitor function is
required then the unit can be reconfigured to use inputs 5 and
6 as monitor inputs and outputs 5 and 6 as monitor outputs. In
this case the system becomes either 6 in, 4 out with stereo
monitor, or 4 in, 4 out with ripple-through stereo monitor.
The monitor signals become available on input and/or output
TRS jacks 5 and 6. The L and R signals have separate sockets.
Maximum level available is +18dBu. Each TRS socket is
differentially balanced and wired tip hot (+), ring cold (-) and
sleeve ground. To use these with unbalanced equipment link
the ring to the sleeve.
The system diagrams here show the three possibilities for the
iDR-4 without audio expanders fitted.
6x6
Provides 6 inputs (2x mic/line XLR, 4x TRS jack) and 6
outputs (4x XLR, 2x TRS jack). The audio monitor function is
not used.
6x4
Provides 6 inputs (2x mic/line XLR, 4x TRS jack) and 4
XLR outputs. A stereo monitor output is available. Its source
can follow the iDR System Manager mouse or be manually
selected.
4x4
Provides 4 inputs (2x mic/line XLR, 2x TRS jack) and 4
XLR outputs. The stereo monitor has ‘ripple-through’ inputs so
that the monitor signal can be chained through several iDR
units to a single amplifier/speaker system. Note that the
ripple-through function only works with the iDR System
Manager mouse monitoring, not manual select.