TOMCO TECHNOLOGIES, SOUTH AUSTRALIA
P R E -G A T E D R F
D R IV E 0 - 1 m W
G A T E
R F O U T P U T 0 – 2 5 0 W
+ 5 v
0 v
(2 ) P r e -g a te d R F d r iv e a n d in d e p e n d e n t G A T E a p p lie d to a m p lifie r
A d ju s t tim in g f o r b e s t p e rf o rm a n c e
Status indicators
DC power:
The DC power status indicator monitors the amplifier's main internal DC
supply rail. If the LED is lit, then DC voltage is present on the VDC input.
RF power:
The RF power status indicator monitors the RF voltage at the output of the
amplifier. If the LED is lit, then significant RF voltage is present at the RF
output of the amplifier. Note that at very low output levels, or at very low
duty-cycles, the LED will light very dimly.
Overtemp:
The Overtemp status indicator monitors the temperature of the amplifier
module heatsink. If the LED is lit, then the heatsink temperature is above
its allowable limit. In this case GATE input is disabled off until the
heatsink temperature drops to acceptable levels. If the Overtemp LED
lights, check the amplifier duty-cycle and the quality of the RF output load.
Also check that the air flow into and out of the amplifier chassis is not
obstructed in any way (see below).
Cooling and thermal protection:
The amplifier requires fan cooling to ensure that the heatsink efficiently
dissipates heat into the surrounding air. Details of the requirements are
given in the application note at the end of this manual.
T003375 Issue A
Page
7