Connect a 3 foot low-loss shielded cable from the TEST POINT (on top
of tuner chassis) to the Signal Strength (vertical) Input on the Ml 3.
Connect a 3 foot low-loss shielded cable from the FM multiplex output
jack on the tuner back panel to the Deviation (horizontal) Input on the
Ml 3.
CONNECTING TO MclNTOSH MR 55A TUNER
Remove the feed-through capacitor L 43 (1000 MMF) connected to
TP No. 1. This capacitor can best be removed by unsoldering. Solder the
center lead of a 1 foot low-loss shielded cable to the Test Point end of
R 27 (100K resistor). Solder the outer shield of the cable to the chassis
where the feed through capacitor was soldered. The cable can feed
through the hole In the chassis where the capacitor was soldered. Use one
of the 1 foot long low-loss shielded cables, stripped and tinned on one
end (female jacks on the other end) supplied with the Mi 3.
Use a connector with male plugs to connect the soldered - in cable to the
signal strength (vertical) Input on the Ml 3. Connect a 3 foot low-loss
shielded cable from the multi-out (multiplex output) jack on the tuner to
the Deviation (horizontal) Input.
If a multiplex adapter is being used with the MR 55A, a "Y" connector
will be needed in the MULTI-OUT jack. This allows both the multiplex
adapter and the lead to the Ml 3 to be connected.
CONNECTING TO MclNTOSH MR 55 TUNER
Solder a wire across resistor R 62
the tuner chassis.
meg) connected to the test point on
Connect a 3 foot low-loss shielded cable from the test point on top of the
tuner chassis to the Signal Strength (vertical) Input on the Ml 3.
Connect a 3 foot low-loss shielded cable from the MULTIPLEX OUTPUT
jack on the tuner to the Deviation (horizontal) Input on the Ml 3.
Connect a low-loss shielded cable from the discriminator output (ahead
of the de-emphasis network) to the Deviation (horizontal) Input on the
Ml 3.
Adjust the SIGNAL STRENGTH (vertical) Multipath control on the back
panel until the pattern on the indicator screen is about ¾ inch from the
top of the vertical scale.
DEVIATION MULTIPATH CONTROL
Tune in a relatively strong local signal with the antenna positioned for
maximum multipath.
Adjust the DEVIATION (horizontal) Multipath control until the horizontal
pattern (loudest signal from the station) does not extend over the ends of
the horizontal scale of the indicator screen.
L+R AUDIO INDICATIONS
Turn the Ml 3 Power switch to ON.
Turn the SCOPE TEST switch to TEST.
Adjust the HORIZONTAL POSITION front panel control until the trace is
centered horizontally on the Indicator screen. Calibration lines are pro-
vided on the Indicator face for centering purposes.
Adjust the vertical position control until the trace dot is positioned at the
bottom of the center vertical scale.
Adjust the INTENSITY AND FOCUS controls for a sharp and clear trace
dot.
Turn the SCOPE TEST switch to L + R Audio.
Set the preamplifier or power amplifier to MONO.
Adjust
the
LEFT
GAIN
and
RIGHT
GAIN
controls
on the Ml 3
until
the
incoming program causes the Indicator trace to align directly over the
line.
CONNECTING TO ALL OTHER TUNERS
Connect a low-loss shielded cable from the input to the first FM limiter
through a 100K resistor, to the Signal Strength (vertical) Input on the Ml 3.
NOW YOUR Ml 3 IS READY TO HELP YOU ACHIEVE MAXIMUM
PERFORMANCE FROM YOUR SYSTEM
8
(60 pages)
(22 pages)
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