User's Manual

PTRL-LCD & RXRL-LCD
ELETTRONICA
21 / 36
User Manual
Rev. 2.3 - 26/06/19
6.2 Operation
Switch on the receiver by putting the selector on the position “I” (on) the switch
situated on the rear pannel.
Enter the menu “Set” and set the working frequency desired. For the description
of the different menus.
With the help of the switches and trimmers situated on the rear pannel, set the
characteristics (deenphasis) and the levels of the audio outputs.
From the menu “Fnc”, set the muting mode .
6.3 Settings and calibration
The only regulations that should be done manually on the RXRL-LCD are the
regulations of the levels and audio functioning modes.
On the rear pannel of the unit there is a trimmer for each output of the receiver. The
sensitivity of the different outputs can be regulated with the trimmers as indicated
in the following tables:
Sensitivity of the outputs:
Output
Chap. 7.5
Trimmer
Sensitivity
Notes
MPX
[13]
[14]
-20 ÷ +13 dBm
Output level for 2.0 kHz (-30 dB) of
deviation
SCA
[5]
[6]
- 8 ÷ +13 dBm
Output level for 7.5 kHz (-20 dB) of
deviation
SCA/MPX
[4]
[15]
- 8 ÷ +13 dBm
Left-
Mono/MPX
[17]
[16]
-10 ÷ +14 dBm
Output level for 75 kHz (0 dB) of
deviation
Right/Mono
[8]
[7]
-10 ÷ +14 dBm
In order to regulate the sensitivity level of the outputs, it is important to keep in mind
that the instantaneous modulation level is indicated in the predefined menu and that
an indicator indicates that the level is at 75 kHz. For a correct regulation, we advise
to bring a signal equivalent to the signal level of your own audio programme into
the input of the unit and regulate the corresponding trimmer until the instantaneous
deviation coincides with the 75 kHz indication.
For the regulation of the levels of the sub-carriers’ outputs, a similar procedure
can be followed, with the help of the option “X10” which can be selected from
the menu Fnc. With this option, the indicated modulation level is multiplied per
the factor 10, so that the hachured indication of the predefined menu coincides
with a deviation value of 7,5Khz.
As for the stereo version, there is an appropriate menu in which the levels of the
of the right and left channels with the corresponding nominal level indicators for
the maximum 75Khz deviation are indicated separately.
The position of the DIP switches that are needed to select the available options