Operating Instructions Model 100E Instruction Manual
94 045150102 Rev XB1
6.9.2. COM Port Default Settings
As received from the factory, the analyzer is set up to emulate a DCE or modem, with pin
3 of the DB-9 connector designated for receiving data and pin 2 designated for sending
data.
• COM1: RS-232 (fixed), DB-9 male connector.
o Baud rate: 19200 bits per second (baud).
o Data Bits: 8 data bits with 1 stop bit, no start bit.
o Parity: None.
• COM2: RS-232 (configurable), DB-9 female connector.
o Baud rate: 115000 bits per second (baud).
o Data Bits: 8 data bits with 1 stop bit, no start bit.
o Parity: None.
CAUTION
Cables that appear to be compatible because of matching connectors may
incorporate internal wiring that make the link inoperable. Check cables
acquired from sources other than T-API for pin assignments before using.
6.9.3. COM Port Cable Connections
There are two DB-9 connectors on the M100E rear panel. COM1 is a male connector,
COM2 a female connector (Table 6-16 lists pin assignments). T-API offers two mating
cables, one of which should be applicable for your use.
• Part number WR000077, a DB-9 female to DB-9 female cable, 6 feet long. Allows
connection of COM1 with the serial port of most personal computers. Also available
as Option 60 (Section 5.5.1).
• Part number WR0000024, a DB-9 female to DB-25 male cable. Allows connection
to the most common styles of modems (e.g. Hayes-compatible) and code
activated switches.
Both cables are configured with straight-through wiring and should require no additional
adapters.
To assist in properly connecting the serial ports to either a computer or a modem, there
are activity indicators just above each COM port. When power is applied to the analyzer,
the red LED should be illuminated. If this LED is dark, it indicates a communications error
between serial port and CPU.
Once a cable is connected between the analyzer and a computer or modem, both the red
and green LEDs should be on. If not, COM1 can be switched between DTE and DCE
modes using a small switch on the rear panel to exchange the receive and transmit lines
(emulating a cross-over or null-modem cable). If both LEDs are still not illuminated,
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