Agilent Technologies E4419B User Manual page 157

Serial Interface
Press this softkey to access a menu which gives you a
selection of serial interface tests to perform.
UART Config
Press this softkey to initiate a test which writes to the
scratch register and reads back. The test also sets the
baud rate, word length, stop bits and parity; then reads
back from the UART to check that the settings are
correct.
Local Loop Back
Press this softkey to initiate a UART local loop back
diagnostic with the transmitter (Tx) internally connected
to the receiver (Rx).
RS232 Loop Back
Press this softkey to initiate an RS232 loop back test on
the serial interface port. A pop up message appears
stating that a test connector must be in place. The test
connector must have the following pins jumpered: Tx (3)
and Rx (2), RTS (7) and CTS (8), DTR (4) and DSR (6).
This test will only run if the RS232 interface is currently
selected.
A softkey menu offers the following choices:
Run Test - performs the RS232 loop back test and
Cancel Test - quit test and return to previous menu.
RS422 Loop Back
Press this softkey to initiate an RS422 loop back test on
the serial interface port. A pop up message appears
stating that a test connector must be in place. The test
connector must have the following pins jumpered: Tx- (4)
and Rx- (2), Tx+(3) and Rx+(6), RTS-(9) and CTS-(1),
RTS+(7) and RTS-(8).
This test will only run if the RS422 interface is currently
selected.
A softkey menu offers the following choices:
Run Test - performs the RS422 loop back test and
Cancel Test -quit test and return to previous menu.
Agilent E4419B User's Guide
Front Panel Menu Reference "System/Inputs" Menu
reports the results.
reports the results.
Menu Reference
3-31