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User Manual
Rev. 1.0 - 18/03/21
TEX302TFT
ELETTRONICA
5.1.6.5 Modulation adjustments
To modify the levels and operating modes of the equipment, access the
AUD
menu and use the touchscreen or keys and to adjust the various settings.
Note:
On the rear panel of the device there are trimmers for the fine adjustment
of some inputs of the equipment and the screen printed diagram indicates which
input each trimmer refers to.
The sensitivity of the various inputs can be adjusted with the limitations described
in the following table:
Input
Sensitivity
Notes
SCA1/RDS
- 9,2 ÷ +12 dBu
Input level for 3,5 kHz overall deviation
(-30 dB)
SCA2
- 9,2 ÷ +12 dBu
MPX
-12,5 ÷ +13,3 dBu
Input level for 75 kHz overall deviation
(0 dB)
Left/Mono
-12,7 ÷ +13,2 dBu
Right
-12,7 ÷ +13,2 dBu
Pilot
-70,6 ÷ -17,6 dB
Absolute level overall deviation
(normally - 20 dB)
Note:
When adjusting the sensitivity level of the inputs, keep in mind
that the menu shows the instantaneous modulation level. For correct
adjustment, it is therefore advisable to apply to the input a dBm signal with
a level equal to the entered dBu level.
To adjust the levels of the inputs of the sub-carriers, a similar procedure can be
used, using the option
x10
that can be selected in the
MIX
menu. With this option,
the indicated modulation level is multiplied by a factor of 10. The indication of
75 kHz actually coincides with a deviation value of 7.5 kHz.
