R.V.R. Electronica PTRL, User Manual

Page: 22 / 48

PTRL & RXRL LCD
18 / 44 User Manual Rev. 1.2 - 31/01/05
6.2 Use
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, read the chapter 6.4.
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 predefined menu, set the desired power level.
From the menu "Fnc", set the power output
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 inputs
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
SCA/MPX [4] [15] - 8 ÷ +13 dBm
Output level for 7.5 kHz (-20 dB) of
deviation
Left -
Mono/MPX
[17] [16] -10 ÷ +14 dBm
Right/Mono [8] [7] -10 ÷ +14 dBm
Output level for 75 kHz(0 dB) of
deviation
In order to regulate the sensitivity level of the inputs, 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.