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RS-232
Port
UUT
Figure 5-5. Testing the RS-232 UUT Port via RS-232 Host Port
Terminal This procedure uses the Terminal accessory supplied with Windows (or equal)
to test RS-232 UUT port operation.
Visual Basic This procedure uses Visual Basic (see Appendix D) to test RS-232 Host
port and RS-232 UUT port operation.
How to Test RS-232 UUT Port Operation via a Terminal
Complete the following procedure to test RS-232 UUT port operation via the RS-232
Host port using the Windows Terminal accessory (or equal).
1. Complete "RS-232 UUT Port Setup Procedure" to the Calibrator RS-232 UUT port
to match the parameters of the UUT RS-232 port.
2. Complete "Testing RS-232 Host Port Operation using a Terminal" to set up the
Calibrator RS-232 Host port to match the parameters of the PC COM port. After Step
9, return to this procedure and continue to Step 3 below.
3. On the Terminal screen, type UUT_SEND "<uut command>" where <uut command>
is the command you selected for the UUT response, then press <Enter>. Observe the
UUT responds. For example, to send the command REMS to a UUT, use
UUT_SEND "REMS\n" and press <Enter>.
Note the use of \n, which indicates a Carriage Return (CR) as the end-of-line
character. Other characters include \r (Line Feed), \t (Tab), \b (Backspace) and
\f (Form Feed). If your UUT commands require an end-of-line character, select one
or more of the above.
The characters UUT_SEND "<uut command>" should have appeared as they
were entered. If they did not appear on the screen, the RS-232 interface between the
PC and Calibrator Host port is not operating. Review the "RS-232 Host Port Setup
Procedure" and correct the problem.
4. If the UUT command does not execute, refer to step 3 of the "RS-232 UUT Port
Setup Procedure" procedure to verify the RS-232 UUT port parameters. Also check
the cable for UUT connection was a modem (not null modem) cable. Be sure your
command was entered correctly had the proper end-of-line character(s), if required.
How to Set up the RS-232 UUT Port for Remote Control
Modem Cable
Null Modem Cable
COM Port
Controller
Remote Operations
SERIAL 2
TO UUT
Port
5522A Calibrator
gjh045.eps
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