Intashield IS-200 Operating instructions

- 1 -
HyperTerminal Test
Instructions on How to Use HyperTerminal to Test Serial Cards

- 2 -
HyperTerminal Test
Contents
1. Introduction......................................................................................................................3
2. Loopback connector ........................................................................................................3
3. Loopback test ..................................................................................................................3
4. Cross over cable..............................................................................................................8
5. Port to Port test................................................................................................................9

- 3 -
HyperTerminal Test
1. Introduction
This document describes how to use the Microsoft HyperTerminal application in order to prove that your
serial card is functioning correctly. This assumes that the card is correctly installed. Windows 2000
Professional is used in the example. However, the document also applies to Windows Vista, XP and Server
2003
Please Note: HyperTerminal is not distributed with Windows Vista and needs to be downloaded from
http://www.hilgraeve.com/htpe/download.html. Alternatively, if you do not have access to the internet, please
use the SerialTest.exe program on the CD.
In this example the card installed is an IS-200 2-port PCI card on “COM1” but it can be applied to any COM
label. This example will also apply to all RS232 PCMCIA cards.
2. Loopback connector
On the ‘D’ type connector, electrically short pins 2 and 3. This can be easily achieved by placing an electrical
jumper over the pins. See below:
3. Loopback test
Set up the card to be able to perform a loopback. See 2 and 3.
From the Start menu select Programs\Accessories\Communications\HyperTerminal or perform a search in
My Computer for “HyperTerminal”.

- 4 -
HyperTerminal Test
Double click on the application and the following window will appear:
Type in a connection identifier name say “Test1” and click OK. The only restriction here is it cannot be a
device name e.g. “COM1”
You will then be presented with the following dialogue box:
Here it is possible to choose the COM port to test using the drop down box. In this example we will use the
onboard port COM1. Click OK.
The next dialogue box will ask for the Port Communication Settings:

- 5 -
HyperTerminal Test
Click “Restore Defaults” then OK.
If all went well you would then be give a blank dialogue box with a flashing cursor. The COM port is now
open and ready to transmit and receive data.
From the File menu choose Properties:
Click on the Settings tab:

- 6 -
HyperTerminal Test
Click on the ASCII Setup button:

- 7 -
HyperTerminal Test
Then check the “Echo typed characters locally” tick box:
Click OK for both open dialogue boxes and the original blank screen will appear again. Ensure the loopback
connector is connected as described in section 2.
Now, every time a character on the keyboard is pressed two will appear on the screen:

- 8 -
HyperTerminal Test
This means that characters are being transmitted and received through the loopback. If you don’t believe us
remove the loopback connector. This time you should only see one character each time a key is pressed.
4. Crossover cable (Null modem)
A cable from a serial port always connects to another serial port. An external modem or other device that
connects to the serial port has a serial port built into it. For modems, the cable is always straight thru: pin 2
goes to pin 2, etc. The modem is said to be DCE (Data Communications Equipment) and the computer is
said to be DTE (Data Terminal Equipment). Thus for connecting DTE-to-DCE you use straight-thru cable.
For connecting DTE-to-DTE you must use a null-modem cable (also called a crossover cable). There are
many ways to wire such cable. (see page 12 for an example of typical crossover cable)
Today the PC is usually used as DTE instead of a terminal (but real terminals may still be used this way).
The names of the pins are the same on both DTE and DCE. The words: "receive" and "transmit" are from the
"point of view" of the PC (DTE). The transmit pin from the PC transmits to the "transmit" pin of the modem
(but actually the modem is receiving the data from this pin so from the point of view of the modem it would be
a receive pin). Today, people wanted to connect DTE to DTE (for example a computer to a terminal) and
various ways were found to do this by fabricating various types of special null-modem cables. In this case
what pin connects to what pin becomes significant.

- 9 -
HyperTerminal Test
This is one of the examples how to create DTE to DTE crossover cable connection.
5. How to perform Port to Port test
Set up the card to be able to perform a port to port test. Use “good” working port as a reference port (can be
on-board port or either port of different PC). Connect two ports with Cross over cable (for more information
section 4 of this document.)
Open two sessions of HyperTerminal, one for each port.
From the Start menu select Programs\Accessories\Communications\HyperTerminal or perform a search in
My Computer for “HyperTerminal” Double click on the application and the following window will appear:

- 10 -
HyperTerminal Test
Type in a connection identifier name say “Test1” and click OK. The only restriction here is it cannot be a
device name e.g. “COM1”
You will then be presented with the following dialogue box:
Here it is possible to choose the COM port to test using the drop down box. In this example we will use the
onboard port COM1. Click OK.
The next dialogue box will ask for the Port Communication Settings:

- 11 -
HyperTerminal Test
Click “Restore Defaults” then OK. Same settings need to be applied for both ports.
If all went well you would then be give a blank dialogue box with a flashing cursor. The COM port is now
open and ready to transmit and receive data. Whatever you type in one window shall be displayed in second
window. This means the data is transferred between two ports. If you noticed a garbled character, make sure
that the selected baud rate is identical on both sides of the connection.