Palstar AT4K Owner's Manual - page 8
8
Front Panel Description
1-800-773- 7931 W W W .PALST AR.CO M
1. POWER/SWR METER Dual needle meter displays FOR-
WARD and REFLECTED power in watts. SWR is measured
where the two needles intersect on the red scale.
2. DIRECT/TUNED MODE SWITCH Six-position rotary
switch selects an output coaxial connector with DIRECT mode
which bypasses the tuner, and TUNED mode which passes the
signal through the tuner components.
a. BYPASS Selects BYPASS COAX connector, bypassing the
tuner matching circuit but providing SWR, FORWARD & RE-
FLECTED power meter readings. Many operators connect a
dummy load to the Bypass connector so it can be selected by
switch.
b. DIRECT COAX 1 Selects COAX 1 connector bypassing
the tuner matching circuit but providing SWR, FORWARD and
REFLECTED meter readings.
c. DIRECT COAX 2 Selects COAX 2 connector bypassing
the tuner matching circuit but providing SWR, FORWARD and
REFLECTED meter readings.
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Operating Your AT4K 13
1-800-773- 7931 W W W .PALST AR.CO M
4. Set POWER RANGE switch to 300 W (Power Range Me-
ter Switch button OUT).
5. Set OUPUT SELECTOR switch to the position matching
your antenna connection. To tune your antenna, the switch
selection must be set to: COAX 1 TUNED, COAX 2
TUNED or WIRE (BALANCED ANTENNA). Selecting
COAX 1 DIRECT, COAX 2 DIRECT or BYPASS bypasses
the tuning section. Also, the tuned output switch (#8 on pg.
8) must be set to the correct position: IN for balanced,
OUT for coax.
6. Key your transmitter and adjust the power level for a
reading of 100-150 watts on the FORWARD scale. Adjust
the INPUT, OUTPUT and INDUCTOR controls for a mini-
mum REFLECTED reading control.
7. Read the SWR on the red scale at the point where the
two needles intersect. Repeat TUNING the input and an-
tenna controls until the lowest SWR reading is obtained.
This procedure takes patience the first time. The input
and antenna controls vary the capacitors and provide
fine adjustments. The roller inductor crank control pro-
vides coarse adjustment.
8. When you have tuned your antenna to the best SWR,
record the settings of the INPUT, ANTENNA and INDUC-
TANCE controls on the chart above for future reference.
When you retune, use these settings as your starting point.
CAUTION:
When approaching the end stops (readings
of 0 and 228 on the turns counter) of the roller inductor,
SLOW DOWN. Slamming the roller wheel into the
mechanical end stops on either end of the roller induc-
tor can damage it.