ELECRAFT KXPA100, Руководство пользователя

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5
Cabling
1. Connect your station ground to the
GND
thumbscrew {23}. A good station ground is important for
safety and to minimize local radio frequency interference (RFI).
2. Attach the
RF INPUT
{24} to the output of your driving transceiver or transmitter using a 50 ohm
coaxial cable with an PL-259 male connector on the KXPA100 end. The driving transmitter must supply
up to 5 watts for full output from the KXPA100.
3. Attach the
RF OUTPUT {14}
to a suitable load with an SWR of less than 1.5:1. A dummy load is
strongly recommended for initial testing.
4. Connect the PA KEY {19} to the driving transmitter Key Output. This line must be grounded to
transmit, and 1 mA of current is sourced. The KXPA100 PA KEY jack is pulled up to 5VDC when not
transmitting.
5. Optional:
RS232 (PC)
{21} connects the KXPA100 to your personal computer with a Elecraft KXUSB
adapter cable. Required for updating the KXPA100 firmware.
6. IMPORTANT: Position the amplifier so the cooling fins may take advantage of natural convection.
Three positions are recommended: base down with the fins pointing up, Front down, with the heat sink
fins vertical, or Rear panel down with the heat sink fins oriented vertically. Ensure that there is at least 2
inches (5 cm) clearance above the amplifier for proper air flow.