Magnum MD 90, Instruction Manual

- 6 - 

CONTROLS AND FUNCTIONALITY 

(Letters correspond with image on the following page)

A.

POWER – 

Turns the power (AC) on and off to your tuner, with the optional 

remote system this switch must be left in the “OFF” position.  

 
B.

STEREO – 

Switches your tuner from Stereo to Mono and vice-versa. Switching 

to Mono will often clean up noisy stereo transmissions and aid in delivering 
quiet listening to weaker signals.  

 
C.

I.F. BANDWIDTH – 

 When 

BW 1 

is selected your tuner is in the wide IF 

(Intermediate Frequency) bandwidth setting. This setting produces the best 
sound possible where strong adjacent channel interference is not an issue. 
When 

BW 2 

is selected the tuner is placed in the “Narrow” bandwidth setting, 

this setting produces optimal sound performance where adjacent channel 
interference is a factor. 

D.

MUTE – 

In the “ON” position, a limit is now placed on your tuner. While scaling 

up and down the FM dial, weak stations will be overlooked so that no alarming 
noises will be heard while looking for programs. We recommend that with the 
optional remote system you leave the Mute switch in the “ON” position.  

E.

TUNING KNOB – 

Rotating this knob allows you precise control of the fine 

tuning of the FM signal you are listening to. Slight de-tuning of the tuner may 
aid in eliminating measures of multi-path or other atmospheric conditions that 
may affect the sound quality of your reception.  

DISPLAYS AND METERS 

(Letters correspond with image on the following page)

 
F.

MULTI-PATH METER – 

This meter indicates multi-path (multi-path is the same 

FM signal being received by your antenna and tuner at two different time 
intervals). Your multi-path meter should read zero. If this meter reads more 
than zero, move your antenna to a different location or rotate your antenna so 
that your meter reads zero. If this does not correct the problem a better or 
different antenna system may be required, please visit the 

Reception 

Techniques

 section in this manual. 

 
G.

CENTER TUNER METER – 

Indicates the setting of the tuners front end in 

relation to the station you are tuning to. In normal situations this needle should 
be tuned to the central point of this meter.