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Home
>W682D Liquid Cooled
W682D
VHF Power Amplifier Module
(Liquid Cooled)
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Itelco proudly presents
its liquid cooled
UHF full LD-MOS power amplifier module, used in
Solid State Transmitters. The ruggedly designed power amplifier modules (PAs)
are broadband, covering the entire 470-860 MHz UHF range. The
PAs are equipped with RF devices suitable for broadcasting signal
amplification both in analog (common and separate) and digital
transmission (DVB and DTV). Itelco power amplifier modules achieve
unsurpassed peakpower margins and efficiency due to advanced circuit
design (e.g. no need for circulators), state-of-the-art solid
state technology, and efficient liquid cooling. Temperature compensation
and power gain of the modules are microprocessor controlled. Each
module incorporates a dedicated high efficiency switchmode DC/DC
converter. There are no dangerous high voltages (43 Volts are
nominal) at the modules input. Modules require no tuning and are
self-protected against VSWR, RF input overdrive, overcurrent,
overtemperature, overvoltage and undervoltage. Modules are hot-pluggable
thanks to the use of isolated combiners, allowing safe removal
and insertion without interrupting transmitter operation. Incorporated
quick connectors ensure engagement and disengagement from the
liquid cooling circuit without loss of liquid coolant. A phase
and amplitude regulation control is located at the input of each
amplifier module to ensure maximum combining efficiency. RF power
outputs of the various amplifier modules are combined by means
of wideband combiners.
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FUNCTIONAL
BLOCK DIAGRAM
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TECHNICAL
CHARACTERISTICS
Electrical Features
Frequency range |
170 to 240MHz (Full Band) |
Input/Output impedance |
50 ohm |
Nominal input power |
20mW DVB |
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32mW DTV |
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75 mWps (Comb.) |
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100 mWps (Sep.) |
Input Return loss |
< -18 dB |
Operative gain setting |
43dB ± 3dB
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Flatness |
±2dB
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Nominal output power |
400 Wrms DVB (Max 420W)
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650 Wrms DTV (Max 700W)
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1500 Wps Ps (Comb) (Max 1600W)
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2000 Wps Ps (Sep.) (Max 2200W)
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Woking class |
AB
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Nominal Power Supply |
40V
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Power consumption DVB mode |
2300W max
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Power consumption DTV mode |
3000W max
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Power consumption A+V comb |
3500W max
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Power consumption V separat |
4000W max
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Environmental Features
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Temperature range |
0 ÷ 45°C |
Altitude range |
0÷ 3000 meters |
Relative Humidity |
0÷ 95% without condensation |
Dimensions |
212x500x177mm. |
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Copyright@2003
Itelco USA Inc -
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