Specifications

Section 4

Sound Card Interface Operation for the PK-900/PSK

To use the sound card interface, you will need a PC software program for the mode you

wish to use. PK-Term for Windows and Digipan are two programs that include PSK-31.

PK-Term fully supports the PK-900/PSK for seamless automatic sound card operation.

Programs like Digipan may not support the new PK-900 SCD command to select the PK-

900 Sound Card mode and switch the PK-900 PTT output between transmit and receive.

To support programs like Digipan that have not yet been updated, Timewave has included

a free utility program called ModemSwitch™. This program helps you set up the correct

COM port and baud rate on your computer, and lets you select the sound card mode and

operate the PK-900 PTT output with a few clicks of your computer mouse buttons. It

even has a rudimentary dumb terminal for a quick check of your data controller. Read the

ModemSwitch help file for more information. Be sure to download the latest upgrade for

ModemSwitch™. See the Timewave document “PSKSoftware.pdf” for more third party

software information on Sound Card programs. Both are on the Timewave CD and the

the Timewave website:

http://www.timewave.com

A new command has been added to the PK-900 to select the sound card interface. The

new command is “Soundcard”. The short version of the command is “SCD”. To select

the sound card interface, type “SCD ON” when you are in the PK-900 command mode

(CMD:). To return to the normal TNC mode, type “SCD OFF” when you are in the PK-

900 command mode (CMD:). Some programs, such as PK-Term for Windows from CSS,

have integrated the sound card command into their operation. In those programs the

sound card command will be executed automatically whenever you select the PSK-31

mode.

If you would like the latest demo copy of PK-Term for Windows, download it from http:/

/www.cssincorp.com. A copy is also on the Timewave CD for your convenience.