Input connections – Viking MCX-106 User Manual
Page 9
Generally speaking, there are two rules to follow when connecting equipment outputs
to the inputs of other equipment.
1. Properly match the impedances of the outputs and inputs.
2. Connect low impedance outputs to high impedance inputs.
It goes without saying that not only input and output impedance matching but also
level matching should be taken into consideration. Each input channel of the MCX-
106 is provided with an input TRIM control, so the usable signal level range is very
wide. Input impedances and levels are shown in the following table.
*Sensitivity is the level required to produce a program out level of +4dBm.
*0dBm is referenced to 0.775V RMS.
All XLR Type connectors are electronically balanced (transformer less). Phone jack is
unbalanced.
If the line going from one piece of equipment to another is long (more than 5m), we
recommend that balanced outputs be connected to balanced inputs.
As is described in the beginning of the Operating Instructions Manual, the connectors
of the MCX-106 are wired as follows: Pin 1 is ground (shield). Pin 2 is cold (low,
minus). Pin 3 is hot (high, plus).
INPUT SPECIFICATIONS
CONNECTION
INPUT
ACTUAL
LOAD
IMPEDANCE
FOR USE
WITH
NOMINAL
TRIM
POSI-
TION
SENSITIVITY
(PGM OUTPUT
LEVEL +4dB)
MAX BEFORE
CLIP INPUT
LEVEL
CONNECTOR
CH6
AUX (L & R)
EFF/RET
GEQ
PWR
BUSS LINK
(PGM, FB, EFF)
LOW Z
HIGH Z
——
——
——
——
——
10
0
10
0
-55dBm (1.38mV)
-16dBm (123mV)
-35dBm (13.8mV)
+4dBm (1.23mV)
-34dBm (15mV)
+1.7dB (0.94V)
-14dBm (150mV)
+20dB (7.75V)
XLR TYPE NC3F
PHONE JACK
-l0dBm (245mV)
+8dBm (1.9V)
PHONE JACK
RCA PIN J A C K
-20dBm (77.5mV)
+4dBm (1.23V)
+4dBm (1.23V)
+4dBm (1.23V)
-2dBm (0.61V)
PHONE JACK
PHONE JACK
PHONE JACK
PHONE JACK
+20 dBm (7.75V)
OPEN
MICRO-
PHONES
LOWER IMP
LINES
LOWER IMP,
LINES
LOWER IMP,
LINES
LOWER IMP,
LINES
LOWER IMP
LINES
— 8 —
CH1
Input Connections