Fluke 5502A - Test RS-232 UUT Port Operation with a Terminal

5502A
Operators Manual
5-18
UUT
5502A Calibrator
Controller
SERIAL 2
TO UUT
Port
COM Port
RS-232
Port
Null Modem Cable
Modem Cable
gjh045.eps
Figure 5-5. Testing the RS-232 UUT Port with RS-232 Host Port
Terminal This procedure uses the Terminal accessory supplied with Windows (or equal)
to verify RS-232 UUT port operation.
Visual Basic This procedure uses Visual Basic (see Appendix D) to verify RS-232 Host
port and RS-232 UUT port operation.
Test RS-232 UUT Port Operation with a Terminal
Complete the subsequent procedure to verify RS-232 UUT port operation with the
RS-232 Host port with the Windows Terminal accessory (or equal).
1. Complete “RS-232 UUT Port Setup Procedure” to the Calibrator RS-232 UUT port
to the same parameters of the UUT RS-232 port.
2. Complete “Test RS-232 Host Port Operation with a Terminal” to set up the
Calibrator RS-232 Host port to the same parameters of the PC COM port. After Step
9, go 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 push <Enter>. See the UUT
result. For example, to send the command REMS to a UUT, use UUT_SEND
“REMS\n” and push <Enter>.
Note that \n is used, which shows 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 an end-of-line character is necessary for the UUT commands,
select one or more of the above.
The characters UUT_SEND “<uut command>“ show as they are recorded. If they
did not show on the screen, the RS-232 interface between the PC and Calibrator Host
port is not in operation. Read the “RS-232 Host Port Setup Procedure” and correct
the problem.
4. If the UUT command does not do what it must, see step 3 of the “RS-232 UUT Port
Setup Procedure” to verify the RS-232 UUT port parameters. Also examine the cable
for UUT connection was a modem (not null modem) cable. Make sure the command
was recorded correctly and had the correct end-of-line character(s), if necessary.