User's Manual

To communicate with the module test fixture you must first set-up your terminal or PC.

Make sure you select the appropriate communication serial port. For most applications,

select 8 DATA bits, No Parity bit, 1 STOP bit, and Hardware Flow Control. If you are

using a terminal program, you may find these options under communication settings or

terminal settings. Some software packages require that you select a specific brand or type

of modem. You may select Hayes compatible, Standard or Default. It is also

necessary to choose a DTE speed or baud rate for proper module operation. The DTE

speed should be set 57600bps. The module will accept lower speeds, but the

consequence would be poor throughput during data transfers.

You now should be able to communicate to the MDK2001 and module. Turn the power

on and type the letters AT followed by a carriage return or Enter key. The “ AT ” is a

command to the module; meaning ATtention what follows is a command. The module

should accept the AT command and automatically set it’s DTE speed and parity to match

the settings you have set on your equipment. The screen should display the AT and also

respond with the OK result code acknowledging it has received the command. This

demonstrates that the module is working properly and you may continue your design

efforts.

MDK-2001 Lights and Descriptions

PWR – Power LED - This light will be on when the MDK-2001 is turned on regardless

of whether there is a module installed.

DTR – Data Terminal Ready Light - The DTR light indicates the module is receiving

the Data Terminal Ready signal from the DTE on pin twenty of the serial port cable. This

signal must be present for the module to connect. The AT&D0 command may force this

signal but will have no effect on the DTR led.

TXD – Transmit Data Light - The on condition of this light lets you know that the

module is transmitting data or processing an AT command.

RXD – Receive Data Light - This light indicates that the module is receiving a

command or data.

CTS – Clear to Send Light - When this light is lit, the module is outputting a signal to

pin 5 of the serial port connector. This light and signal should always be on when the

module is under power, except when they are toggled indicating a full buffer during data

transfer.

MI – Mode Indicator Light - The MI light will be on when the module has established

a wireless connection with a remote module. This light will also be on if the carrier signal

is forced with the AT&C0 command.

WP- Light – This light will on when the module has power

LIP – Link In Process – The on condition of this light indicates that the module is

attempting to establish a wireless link. It will flash during a connection with frequency

hopping enabled.

2RD – Not currently used