ELECRAFT KAF2, Руководство по сборке и эксплуатации

Страница: 8 / 16

8
Installation
i
Two screws are used to hold the Control board to the Front Panel board. The screw on the left end
(as viewed from the K2 front panel) will be replaced with the male-female standoff supplied with the
KAF2. Once the KAF2 is in position, the original screw and lock washer will be used to hold it in place.
Thread the 1/2" (12 mm) male-female standoff through the mounting hole in the control board (near
C29) and into the front panel standoff. The standoff should be firmly hand-tightened.
Plug the KAF2 module into the Control board as shown below. All pins of P1 and P2 on the KAF2
must be correctly mated with J1 and J2 on the Control board, or either board could be damaged.
J1 J2
MCU (U6 )
KAF2
i
If the standoff does not line up with the hole near the middle of the KAF2 module, you may
have the pins of J1 and J2 shifted by one position.
Use the original Control board screw and lock washer to secure the KAF2 to its standoff.
Alignment and Test
Turn on the K2. If you see or smell smoke, turn the rig off immediately and refer to Troubleshooting .
Low-Pass Filter
Switch to LSB or USB mode and select a wide crystal filter bandwidth using
X F I L
. Use
O P 1
(option
filter 1) if you have the SSB adapter installed; otherwise use a wide setting of the variable-bandwidth filter.
Turn the preamp and attenuator off using
P R E / A T T N
. (Make sure the annunciators are turned off.)
Disconnect the antenna, and plug in a pair of headphones.
Set RF GAIN fully clockwise. Set AF GAIN so that you can clearly hear receiver background noise.