11
READY
- single LED, yellow. Turns on at the end of warm-up period, when the mains power to DX-1d is
switched on. It turns off for about 2 minutes if the plate current protection is triggered. In this case, the
FAULT light also turns on.
FAULT
- single LED, red. Turns on in 3 situations:
•
when the over-temperature protection is triggered, the FAULT turns on until the tube cools to a safe
level. During this time, the operation of the amplifier is disabled, the screen voltage is off and any RF
power applied to the input is bypassed directly to the output.
•
when the over-current protection is triggered, FAULT turns on for 2 minutes, while READY turns off
•
at DX-1d power up, if the OPR/STBY switch on the front panel is left in OPR position. The FAULT
light will go off when the DX-1d is ready for operation, after warm-up.
SWR
- single LED, red. A three second cut-off will happen if your antenna has a SWR worse than 2:1
(typical 2.6:1) at the operating frequency. During the cut-off, the RF from the input is directly by-passed to
the output.
OVER-DRIVE
- single LED, yellow. Flashes when the input drive is exceeding the linear operation level. If
even more drive is applied, the overdrive protection will cut off the operation for about 2 seconds.
NOTE
: the input drive at which the indicator turns on depends on a certain extent on the tuning of the
amplifier.
Figure 1.
Front Panel Display
RF OUTPUT POWER (kW)
REFLECTED POWER (W)
PLATE VOLTAGE (kV)
PLATE CURRENT (A)
Ig2
OVER
DRIVE
ON AIR
READY
SWR
FAULT