Manual Marantz Model 2252 (page 11 of 20) (English)

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HI FILTER SWITCH

This switch can be used to reduce high frequency

noise such asthat associated with the playing of

poorly recorded tapes or worn disc recordings.

When the AM tuner is being used,this switch will

help to suppress considerably the high pitched

"whistle" caused by adjacent AM channel inter-

ference. This filter will also, along with high fre-

quency noise, slightly attenuate high frequency

program material, and should therefore be used

judiciously.

MONO SWITCH

When a marginal stereo signal is received, random

noise and phase modualtion may causethe tuner's

multiplex circuitry to trigger the STEREO mode

intermittently. In this case, it is sometimes desir-

able to cancel the multiplex operation entirely in

favor of obtaining a more listenable signal. The

MONO switch performs this function and con-

verts all output signals to the MONOPHONIC

mode.

While playing a single channel source such as TV

or AM, depressthe MONO pushswitch to hear the

source through both speakers. When playing a

monophone phonograph record, use this push-

switch to suppress rumble, record surface noise,

and pinch effect distortion.

TAPE 1 MONITOR SWITCH

When this pushswitch is "out", the program being

recorded and heard is determined by the setting

of the SELECTOR switch. With the TAP~ 1

MONITOR pushswitch "in", the amplifier input

connections are switched to the output of the

tape recorder without affecting the signal pre-

sented to the tape recorder's input, thus allowing

you to listen to the signal being recorded before

and after recording. This switch is also known as

the TAPE-SOURCE switch.

TAPE RECORDING

AND DUBBING

RECORDING

The program source selected by the SELECTOR

switch may be recorded on to either tape record-

er. When the SELECTOR is set to TAPE 2, how-

ever, the TAPE 2 OUT JACKS are muted to pre-

vent feedback oscillations that would occur if

tape recorder 2 were inadvertently placed in the

record mode.

DUBBING

A tape played on tape recorder 2 may be copied

on to tape recorder 1. Set the SELECTOR switch

to TAPE 2. To monitor tape 1 as it is being re-

corded, depress the TAPE 1 MONITOR switch.

To monitor the source (which is, in this case,tape

2), releaseTAPE 1 MONITOR switch. Either tape

or source can be monitored without disturbing

the actual recording process.

RECORDING DOLBYIZED FM PROGRAMS

Dolbyized FM broadcasts contain Dolbyized

audio information to which a special pre-emphasis

is applied for the purpose of improving the noise

reduction process. To make a Dolbyized tape re-

cording of such broadcast, depress the FM-25pS

switch to properly de-emphasize the signal, but

bypass the noise reduction adaptor to record the

Dolbyized audio directly onto the tape. This can

be done by switching the Noise Reduction switch

to "OFF" if the Dolby adaptor is so equipped, or

by connecting the TAPE OUT jacks of the 2252

directly to the LINE IN jacks of the tape deck.

The inputs to the tape recorder in this application

must be properly calibrated beforehand according

to the procedure detailed in the Dolby unit's in-

struction booklet. To achieve proper calibration,

it is necessarythat the record level control on the

Dolby unit be adjusted to the proper Dolby level

by use of the reference tone transmitted by the

FM station.

For monitoring purposes, connect the Dolby unit

between the line outputs of the tape recorder and

the TAPE IN jacks on the 2252.

When using a tape recorder containing a built-in

FM-25pS de-emphasis circuit, a better signal-to-

noise ratio can be achieved by using only the

FM-25pS circuit in the Model 2252 instead of

the facilities in the tape recorder. Do not use both

de-emphasis circuits simultaneously.

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Marantz Model 2252 Manual

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