Specifications

Enter <CONTROL-C>
Your monitor should respond with the command prompt:
cmd:
Enter D <Enter>
Your monitor should respond with:
cmd:*** DISCONNECTED: AAA
p1 AAA*>AAA (UA)
If all of the above steps were successful, you've completed the quick-
check and are ready to proceed to Chapter 3. In Chapter 3 you will
connect your PK-900 to your radio and begin using it "on the air".
If you have problems with the steps shown above, go back to Step 1
AFTER checking all cables and connectors. Read each step again
carefully. The most common problems are trying to connect to a call
different from AAA, not having the "loopback" jumpers in the
correct pins, or not setting the AFSK levels to 50% rotation.
If you still have problems, leave your PK-900 ON and contact AEA's
Technical Support Department as suggested in the front of this manual.
2.6 Detailed RS-232 Connections for Other Computers
If the type of computer you plan to use with the PK-900 was not
mentioned in the beginning of this chapter, you may find specific
connection information in the sections below. You will also need a
Communications program to use with your computer which AEA can not
provide. See section 2.7 for information regarding Communication
programs for many of these machines.
Some computers require a serial port adapter card that incorporates
the necessary RS-232-C interface circuitry. The IBM-PC and Apple II
series of computers are good examples of this.
Computers that do not have a serial port or do not permit use of a
suitable adapter or level converter cannot be used with the PK-900.
2.6.1 Apple II Series
The Apple II, II+ and IIe computers require an RS-232 Serial card to
connect to your PK-900. The most popular we know about is the
Super-Serial Card which should be available from your Apple dealer.
2.6.2 Commodore C-64, C-128 and Vic 20
Commodore, OMNITRONIX and other manufacturers sell a signal level
converter that is installed in the User Port Connector on the rear of
the computer. The converter changes the computer's internal TTL
voltage levels to the proper RS-232-C voltage levels and polarities.
2.6.3 IBM PCjr
The PCjr uses standard RS-232-C voltage levels; however, the
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