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On the opposite, if an external stereophonic source is already available, the LEFT and RIGHT
inputs must be kept free by using the MPX input (rear BNC); in this case the transmitter must be
set to MONO even if the transmission is STEREOPHONIC.
When the transmission is monophonic, if one enters by the two LEFT and RIGHT channels, the
transmitter is modulated at the nominal value; if only one channel is available, this one must enter at
the same time both in the LEFT and RIGHT channel inputs, so they must be put in parallel
otherwise the deviation would be half of the nominal one.
4.6.13
Here it' s possible to see the frequency deviation value and the input signal values.
When the composite signal is chosen (addition of all the modulating signals), the numerical and
visual indication appearing is the frequency modulation expressed in KHz while on the LEFT,
RIGHT MPX signals, the level is measured and displayed as value 100 when it matches the
nominal value.
The indication states the peak and the chosen measurement will be flashing displayed on the LCD.
By modulating the transmitter through the nominal level input signals and with fixed tone (i.e..
400Hz), the deviation must not exceed 75KHz (COMP) and the input signal level must not exceed
100%. But if a music signal is available at the input, indication can also exceed this value and the
exact rules for this check will be seen in the screen shot 11.
Besides, if the automatic audio gain control is off, the 75KHz deviation value is equivalent to 100%
of the input signal values. On the opposite, if the AGC is on 75KHz deviation can be obtained by an
input signal which is variable, as level, from half to the double of the nominal value.
4.6.14
By entering PAGE UP the following screen shot appears :
By entering PAGE UP the following screen shot will appear:
Pag. 25
A07B500S manual
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