Comdel CX600 Series, Руководство пользователя

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Typical Specifications
(Driver)
Gain 15 dB
Input power 1 watt (max)
Output power 20 watts
Input impedance 50 ohms
Output impedance 50 ohms
Collector voltage at full power * 40 VDC
Current at full power * .7 A
* 600 watts into 50 ohm resistive load
E. PA600 Power Amplifier
The PA600 uses four power transistors arranged in two pairs of push-pull Class "C" amplifiers. The input
power from the driver is matched with a wideband transformer, T1. The driver input is then split into two
signals and fed into two push-pull transformers, T2. Each of these transformers drives the bases of each pair
of power transistors, Q1-Q4. The transistors are operated common emitter with feedback.
The collector signals are coupled by a push-pull hybrid combiner, T3. The output of these combiners is once
again added together in a two -way hybrid combiner. There are no adjustments on the PA600.
Typical Specifications
(PA600)
Gain 15 dB
Input power 20 watts
Output power 700 watts (min)
Input impedance 50 ohms
Output impedance 50 ohms
Collector voltage * 37 VDC
Current draw * 25 ADC
* At 600 watt system output into 50 ohm resistive load
F. Power Monitor Board
The power monitor or directional coupler board (Figure FA0105RX) is a detector, which produces voltages
proportional to the square of both forward and reflected power. The signals from the two detectors are
produced from current and voltage taps off the output line. The forward and reflected signals are fed into the
OCB where they are linearized. They are then fed to the CX controller where they are reproduced to the
remote interface connector and displayed on the front panel. The reflected power signal is only present when
the generator is driving a load that is not purely resistive, or not 50 ohms. This signal is also used to drive the
OCB VSWR shutdown circuitry.
G. CX Controller
The CX controller is comprised of four PC boards mounted to the left side of the front panel:
1. CX INTERFACE PCB
The function of the CX Interface PCB (Figure FA0606RX) is to condition all of the analog and digital
inputs and outputs for the CX Microcontroller. This PCB board also provides the protection control