Rear Panel information
FIG. 8 REAR PANEL
TUNER-SIGNAL STRENGTH (TP 1)
Use the 3 foot low capacity cables provided to connect
Test Point No. 1 (TP 1) on a Mclntosh tuner to this input.
TO PREVENT HIGH FREQUENCY LOSSES, THE SPE-
CIAL 3-FOOT CABLES SUPPLIED MUST BE USED. DO
NOT SUBSTITUTE ORDINARY AUDIO CABLE.
TP 1 supplies the MPI 4 with a voltage which is propor-
tional to the strength of a received FM station. The trace
on the screen will move vertically to indicate relative
signal strength.
TUNER-DEVIATION INPUT (TP 2)
Use the 3 foot low capacity cable provided to connect
Test Point No. 2 (TP 2) on a Mclntosh tuner to this input.
TO PREVENT HIGH FREQUENCY LOSSES, THE SPE-
CIAL 3-FOOT CABLES SUPPLIED MUST BE USED. DO
NOT SUBSTITUTE O R D I N A R Y AUDIO CABLE.
TP 2 supplies a voltage proportional to the modulation
(deviation) of the FM signal. The trace on the screen will
expand in a horizontal direction proportional to a station's
modulation.
PREAMP-LEFT AUDIO INPUT
The left output of a preamplifier connects to this input.
In some modes of MPI 4 operation, the left channel audio
signal causes vertical movement of the trace on the screen.
PREAMP-RIGHT AUDIO INPUT
The right output of a preamplifier connects to this input.
In the stereo mode of MPI 4 operation, the right channel
causes the trace on the screen to move horizontally, in
the sweep or level modes the right channel causes the
trace to move vertically.
PREAMP-LEFT AUDIO OUTPUT
The LEFT AUDIO OUTPUT |ack is directly connected
to the LEFT AUDIO INPUT jack of the MPI 4. Use the
LEFT AUDIO OUTPUT jack to connect the preamplifier
output to the left power amplifier input.
PREAMP-RIGHT AUDIO OUTPUT
The RIGHT AUDIO OUTPUT jack is directly connected
to the RIGHT AUDIO INPUT jack of the MPI 4. Use the
RIGHT AUDIO OUTPUT jack to connect the preamplifier
output to the right power amplifier input.
POWER AMP-SPEAKER IMPEDANCE
The POWER AMP-SPEAKER IMPEDANCE selector cali-
brates the MPI 4 to the speaker impedance in use: 4
W
,
8
W
or
16
W
.
POWER AMP CONNECTIONS
The POWER AMPLIFIER push connections are:
Black Left Amplifier Common
Green Left Amplifier High
White Right Amplifier Common
Red Right Amplifier High
AC POWER OUTLET
The AC power outlet may be used to provide AC to
additional equipment drawing up to 350 watts. The outlet
is not fused and is on whenever the MPI 4 power cord is
connected to an AC power outlet.
FUSE
The 0.5 Ampere fuse protects only the MPI 4. It does
not protect additional equipment plugged into the adjacent
AC power outlet. For continued protection replace the fuse
with like value only.
Initial Setup
After connecting the MPI 4 as described in the previous
section, turn on all equipment. Release the PANLOC but-
tons and slide the MPI 4 out to the adjust position. This
allows access to the level set (top panel) controls. Next:
1. Set top panel LEFT AUDIO TRIM and RIGHT AUDIO
TRIM fully counterclockwise, the SIGNAL STRENGTH
and DEVIATION fully counterclockwise, the MULTI-
PATH POLARITY to minus, the FOCUS control to mid
position, the LOW PASS FILTER to "in", and the
LEVEL MODE switch to NORMAL.
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