10
Initial Test
Connect a power supply or battery to the K1 and turn on power. If you see or smell smoke, turn
power OFF immediately. Check all connections and refer to the Troubleshooting section if necessary.
Tap
M E N U
and scroll through the entries until you find
AT U
. To select the mode for the ATU, hold
E D I T
. If you see three dashes (
- - -
) instead of the
A T U
parameter, refer to Troubleshooting.
Step through the
AT U
menu parameters using
W P M +
and
W P M -
. Each menu entry will be
explained in the Using the ATU section.
Set the
AT U
parameter to
L 0
. You should hear a relay switch when you move from
L 0
to
L 1
, then to
L 2
, etc., up through
L 4
. The same should be true for
C 0
through
C 5
, as well as
N 1
and
N 2
. If you don't
hear any relays switching, see Troubleshooting.
Connect a 50-ohm dummy load to the K1’s antenna jack (5W or higher rating). Use the
O U T
menu
entry to set power to 5 watts.
Set the
AT U
parameter to
F x . x
(KAT1 firmware revision). You should see
F 1 . 1
(or higher). Exit
the menu, then hold
W P M +
and
W P M -
together to go into TUNE mode: you should see
r 8 . 5
.
Immediately tap any key to exit TUNE.
Note:
r 8 . 5
is an SWR test value only, showing whether digital data is being transmitted successfully from
the KAT1 to the K1 in TUNE mode.
SWR Bridge Adjustment (C9)
Make sure a 50-ohm dummy load is connected to the antenna jack.
Select band 1 (the lower of the two bands).
Set the
AT U
parameter to
C L S
(Calibrate SWR) using the menu.
Set power output for 5.0 watts using the
O U T
menu entry. Exit the menu.
Pre-set potentiometers R1 and R2 on the ATU board to about 60% of full clockwise rotation.
Connect the positive lead of a DMM or analog voltmeter to the point labeled
TP1
. Connect the
negative lead to the nearby ground jumper.
Locate a non-metallic tuning tool for adjusting ceramic trimmer C9. An alternative is to use a very
small flat-blade screwdriver or jeweler’s driver, with tape wrapped around the metal shaft to prevent you
from contacting it.
Enter TUNE mode by holding
W P M +
and
W P M -
together. Adjust C9 for the lowest possible
voltmeter reading. (The null may be sharp.) Cancel TUNE mode by tapping any switch other than
W P M +
or
W P M -
.
