AR 2000W1000D, Руководство по эксплуатации и обслуживанию

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Rev B 9
2. OPERATING INSTRUCTIONS
2.1 GENERAL
Operation of the Model 2000W1000D broadband amplifier is quite simple. The amplifier’s input signal,
whether swept or fixed in frequency, is fed into the jack marked RF INPUT, and the amplifier’s output
signal is taken from the jack labeled RF OUTPUT . The unit is turned on by activating the front panel
POWER
switch. In the event of a major malfunction, protection is provided by a circuit breaker located on
the unit’s rear panel.
CAUTION:
The Model 2000W1000D Amplifier is typically not critical in regard to
source and load Voltage Standing Wave Ratio (VSWR) and will remain
unconditionally stable with any magnitude and phase of source and load
VSWR.
However, placing the amplifier in the operate mode without a load
connected to the output connector is not recommended . It has also been
designed to withstand, without damage, RF input power levels up to
twenty (20) times its rated input of 1mW. However, signal levels higher
than 20mW or transients with high peak voltages can damage the
amplifier. Also, accidental connection of the Model 2000W1000D’s
output to its input (either through direct connection or parasitic feedback
paths) will cause oscillations that may permanently damage the unit’s
input transistors.
The 2000W1000D Amplifier is protected from input overdrive by an automatic level control circuit. The
2000W1000D RF power transistors are protected from over temperature by sensing the chassis temperature
near the RF output transistors. In the event of a cooling fan failure or an airflow blockage, the DC voltage
will be removed from the RF stages, when the chassis temperature reaches approximately 70°C.
Normal operation can be resumed after the chassis temperature drops below 70° C.
2.2 CONTROL AND INDICATOR FUNCTIONS
The Model 2000W1000D’s front panel is shown in Figure 2-1; the unit’s rear panel features are detailed in
Figure 2-2.
2.2.1 Keylock Switch
The Keylock Switch is provided for protection from unauthorized use or unexpected remote control of the
amplifier. The amplifier can only be turned on locally when the Keylock Switch is in the LOCAL position.
Likewise, the unit can only be turned on or controlled remotely when the Keylock Switch is in the
REMOTE
position. Placing the Keylock Switch in the INHIBIT position places the amplifier in the RF Off mode and
prohibits any control of the amplifier.