Timewave DSP-232, Operating Manual

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Chapter 2 Power Supply and Computer Installation
If the DSP has been previously initialized, it’s ready to communicate with a computer or terminal at a specific baud
rate (probably 300, 1200, 2400, 4800, 9600 or 19,200bits/sec) or was shut off in the last mode it was operating in,
like packet or Morse.
Reinitializing the controller will make it “forget” all of its user-defined parameters and
will return it to its factory default settings . However, by reinitializing it now you’ll have an easier time getting it
up and running later.
To re-initialize the DSP:
1. Turn power off (power button out.)
2. Press and hold the RESET button on the back panel of the DSP.
3. Continue holding the RESET button and turn the DSP on (power button in.)
4. Continue holding the reset button in for five seconds to insure that the controller’s memory has forgotten
all of its previously set parameters.
5. Release the reset button and the unit has been re-initialized.
If the above procedure didn’t restore the proper start-up operation of the DSP’s front panel LEDs, then refer to
Chapter 13 - Troubleshooting .
Connecting Your Computer to the DSP
Make sure that the DSP and computer are turned off before proceeding.
The Cable
For communication to take place between your computer and the DSP, you need a properly wired, shielded cable
that’ll connect the computer’s serial port to the RS-232 I/O port on the back of the DSP. (The cable that
accompanies your DSP is pinned correctly and is ready to use.)
The style of connector you have on your computer is probably a DB-25F (25-pin), a DB-9 (9-pin), or a mini Din-8
for Apple computers (8-pin).
Here’s a table of pin assignments to wire the DSP’s RS-232 I/O port to a typical computer’s serial port see diagram
on next page:
from Apple
DSP-232 to... mini-
RS-232 I/O DB-25F DB-9 DIN-8P Function
1 8 1 2 (DCD)
2 3 2 5 (RxD)
3 2 3 3 (TxD)
5 7 5 4+8 (GROUND)
6 6 6 (DSR)
7 4 7 (RTS)
8 5 8 (CTS)
2-2 September, 05