BLUES30/50NV
ELETTRONICA
25
/ 28
User Manual
Rev. 1.0 - 29/11/16
7. Principi di funzionamento
A schematic view of the modules and connections making up the BLUES30/50NV
with the telemetry board is shown in figure 7.1.
MAIN BOARD
PANEL CARD
POWER SUPPLY
INPUT
(AUDIO/RDS)
R.F.
OUTPUT
P.A AMPLIFIER
MAINS
VPA (24VDC)
CONTROLLER
R.F.
FILTER
2X
STEREO CODER
AES/EBU BOARD
INPUT
(AES/EBU)
Figure 7.1
A brief description of each module’s functions is given below, whereas the complete
diagrams and layout of the cards are given in the “Technical Appendix” Vol.2.
7.1 Power Supply
The BLUES30/50NV power supply unit is a switching-type unit whose 28,5 V
main output powers the machine’s RF amplifier. The power supply also features
stabilizers for generating continuous 5 V and 18 V voltages for supplying the other
equipment circuits. Note that the power supply is a “direct from mains” type, or
rather it is without a transformer, and it can be connected to any voltage between
95 and 250 V without any adjustments or manual settings.
7.2 Panel board - CPU
The panel board contains the microcontroller (PIC18F452) that implements the
equipment control software, the display and the other components needed to
interface with the user.
The board is connected with the other machine modules, both for power supply
distribution and for the control and measures.
