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SC Board Jumper Settings
The SC board has several jumper options that may be changed by the user. In most instances the jumpers
can be left at the factory default settings. The jumpers are located on the SC daughter board at the rear of
the PK-SC.
Rig Control
Not all transceivers have the same polarity settings for their logic level rig control ports. The PK-232SC
polarity settings for RX, TX, RTS and CTS can be changed to meet the requirements of any specific
transceiver. The factory default settings for JP1 (RX), JP2 (TX), JP3(RTS) and JP4(CTS) are pins 1& 2
connected. Connecting pins 2 & 3 will invert the polarity for one line only. Change these settings only if
you cannot your rig control program to recognize your transceiver. Most transceivers will not require any
change!
USB Jack Power
The two type B USB jacks on the PK-232SC default power output is 5 Volts @ 100 mA. This power is
derived from the computer or powered USB hub upstream from the PK-232SC. If the jumper on JP5 is
connected between pins 2 &3 (factory default), the external power supply will not be connected. The USB
circuitry will draw its power from the upstream USB device.
If you want to draw more than 100 mA. (500mA. max) from the PK-232 USB hub ports, you may connect
a 5.0 VDC @ 2A power supply to the PK-232. To do so you must enable the 5.0VDC power jack in the
middle of the PK-232SC back panel. Change the jumper on JP5 to pins 1 & 2. With the jumper in this
position, you must use the 5.0 VDC power supply so the USB circuitry will work!
USB Audio Sound Card Channel Combinations
The USB Audio sound card has two channels.
Receive Audio Input
In the factory default mode, the PK-232 sound card input (receive audio) is fed to both channels
simultaneously. Connecting JP23 pins 1 & 2 enables the factory default combined channel mode.
In optional mode, the PK-232 sound card input (receive audio) is fed to the left sound card channel and the
Aux Audio input (J10-ring on the SC connector board) is fed to the right sound card channel. Connecting
JP23 pins 2 & 3 enables the optional split channel mode.
Transmit Audio
In the factory default mode, both USB Audio sound card output channels feed the PK-232 sound card
output (transmit audio) simultaneously. Connecting JP3 pins 1 & 2 enables the factory default combined
channel mode.
In optional mode, the left sound card channel feeds PK-232 sound card output (transmit audio) and the
right sound card channel feeds the Aux Audio output (J10-tip) on the SC connector board.) Connecting
JP2 pins 2 & 3 enables the optional split channel mode.
