R.V.R. Electronica PTRL, User Manual

Page: 42 / 48

PTRL & RXRL LCD
38 / 44 User Manual Rev. 1.2 - 31/01/05
A schematic view of the modules and of the connections which compose the RXRL-
LCD is shown in the following illustration.
PANEL CARD
POWER
SUPPLY
IF/AUDIO OUT VCO/PLL FRONTEND
BATTERY
INTERFACE
RF CONNECTION
DC CONNECTION
A brief description of the functions of each module will follow, while the complete
schemes and the layouts of the cards are shown in the appendix.
10.1 Power supply
The power supply of the RXRL-LCD is a switching unit whose 24V main output will
formerly be reduced in order to supply the RF stage of the different electronic boards
which compose the unit. The power supply of the RXRL-LCD is a switching type unit,
with 5V, 18V and -15V main outputs which will be adapted to supply the different
electronic boards which compose the unit. Please note that the power supply is "direct
from the AC line", therefore without transformer, and it can be connected to any of the
voltages comprised between 85 and 264 V
AC
without making any regulations or manual
settings.
10.2 Power supply interface
Ther interface card filters and stabilizes the voltages coming from the power supply,
to the 5 V
DC
and 18 V
DC
continuous voltages which are necessary for the supply in the
circuits of the unit., the 24V auxiliary continuous voltage inputs are connected on the