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Archimede 5000 series- FM Power Amplifiers
User’s manual – Page 22 of 65
[55]
48V
DC
power supply input.
[56]
Power supply outputs for the cooling fans.
[57]
Power supply outputs for the fans cooling R.F. amplifier heatsink.
[58]
Data bus from the R.F. amplifier section
– this flat cable sends data referred to the operation of the
R.F. amplifier section
.
This bus, common both for the
Fans control board
and the
Analog board
, carries also information relevant to the temperature
of the R.F. amplifier heatsink. Such data are then processed, and the result allows changing the fans speed accordingly to the
temperature of the R.F. amplifier heatsink.
To assure the
maximum reliability
, the equipment has been designed to allow the fans operation even if this board is broken
(in this case event the fans will turn at the maximum speed in order to assure the maximum safety).
6.4
R.F. amplifier section
The R.F. amplifier section is located on the bottom side of the equipment (
Par. 5.4). Though some differences due to the different
R.F. output powers characteristics of each model, its layout adopts the same structure for all versions. The following paragraphs
deals the R.F. signal path, from the Driver amplifier input up to the R.F. section output.
Besides the circuits specifically dedicated to the amplification function, this section includes three special circuits for the:
Protection of the transistors mounted on the amplifier modules (
Adjustment of the Input, Direct and Reflected powers readings (
Extraction of the direct and reflected power levels, and of the low-level R.F. signal (
6.4.a
Driver amplifier
The first element of this section is the Driver amplifier (
Par. 5.4 - part # [29]). Its amplification depends on the power supply value.
According to the model and to its driving input rated power level, the driver amplifier output power are:
Model
Driving Input rated power
level
Driver amplifier R.F. output power
@ 24V
DC
power supply
Archimede 3000
35W
40W
Archimede 4000
50W
50W
Archimede 5000
60W
60W
Содержание ARCHIMEDE 5000 Series
Страница 56: ...Archimede 5000 series FM amplifiers User s manual Page 56 of 65 Figure 5 Archimede 5000 Top view open ...
Страница 58: ...Archimede 5000 series FM amplifiers User s manual Page 58 of 65 Figure 7 Power Supply unit Circuit diagram 1 7 ...
Страница 59: ...Archimede 5000 series FM amplifiers User s manual Page 59 of 65 Figure 8 Power Supply unit Circuit diagram 2 7 ...
Страница 60: ...Archimede 5000 series FM amplifiers User s manual Page 60 of 65 Figure 9 Power Supply unit Circuit diagram 3 7 ...
Страница 65: ...User s manual Page 65 of 65 ...