Proto-Cast And Proto-Dispatch - M.T.H. New York MTA R-21 Operating Instructions Manual

Proto-Cast and Proto-Dispatch:

When used with the RailKing Remote Lock-on (sold separately),
™ ™
Loco-Sound-equipped engines gain Proto-Cast and Proto-Dispatch
features.
Proto-Cast: This feature allows you to play audio recordings through your
engine's speakers. You must supply the audio source (a small portable
CD/tape player is sufficient) and a male-to-male mini cable (1/8" plug, like
that used for the headset with a portable CD/tape player) to connect your audio
source to the remote lock-on. To use Proto-Cast, simply plug the mini-cable
into your audio source (usually into the headphone jack) and into the "Audio"
port on the right side of the remote lock-on and adjust the volume.
Proto-Dispatch: This feature allows you to broadcast your own voice through
your engine's speakers. You must supply the microphone and a mini cable
(1/8" plug, like that used for the headset with a portable CD/tape player) to
connect your microphone to the remote lock-on. To use Proto-Dispatch,
simply plug the mini-cable into the microphone and into the "Mic" port on the
left side of the remote lock-on and speak into the microphone.
When these features are in use, the locomotive's own sounds (engine sounds
and bells, whistles, and horns) will be muted so that only the sounds you
broadcast will be heard. Because these two features are voice activated, there
will be a 10-15 second delay after you stop speaking into the microphone or
turn off the audio source before the engine sounds resume. To stop using the
feature and return to normal operation, unplug the cable from the lock-on jack.
If using parallel tracks with multiple Loco-Sound-equipped engines,
Proto-Cast and Proto-Dispatch transmissions from one track may be picked up
by the other nearby engines.
If you experience popping and interference, try cleaning the track with
denatured alcohol as described in the "Cleaning the Wheels, Tires and Track"
section of this booklet.
Note: M.T.H. does not recommend using Proto-Cast and Proto-Dispatch
at the same time.
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RailKing R-21 4 Car Subway Set