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Setting Up a Serial Connection
To set the serial configuration switches
To set the serial configuration switches
Set switch S1 to CLOSED (RS-232).
1
Set switches S2-S4 to CLOSED.
2
Set switch S5 to CLOSED (HW HANDSHAKE ON) if your serial
3
interface uses the DSR:CTS/RTS lines for flow control. Set S5 to
OPEN (HW HANDSHAKE OFF) if your serial interface uses software
flow control (XON/XOFF).
If your serial interface supports hardware handshaking, you should use it (set
switch S5 to CLOSED). Hardware handshaking will make the serial
connection much more reliable.
Set switches S6-S8 for the baud rate you will use. These switch
4
settings are listed on the bottom of the HP E3491A Pentium Probe.
The higher baud rates may not work reliably with all hosts and user
interfaces. Make sure the baud rate you choose is supported by your host
and user interface.
Example
To use a baud rate of 9600 baud, set the switches as follows:
To connect a serial cable
Use a grounded, shielded cable. If the cable is not shielded, or if the cable is
C A U T I O N
not grounded at the serial controller, the HP E3491A Pentium Probe may be
damaged by electrostatic discharge.
Connect an RS-232C modem cable from the host computer to the HP E3491A
Pentium Probe. The recommended cable is HP part number C2932A. This is
a 9-pin cable with one-to-one pin connections.
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