Currently, the Wireless Internet setup on MX760HD/MX-780HD does not take ASCII characters but HEX characters. To convert from ASCII characters to HEX characters, there are several available conversion tools available on internet that can be used for free.

Two examples are shown below:

• http://www.wifizard.com/wi-fi/convert.htm
  Please refer to the picture below for the corresponding steps.
  1. Select the size of the key (e.g. 128 bits).
  2. Enter the ASCII characters to be converted (e.g. MX780HD rocks).
     Please note that this string is case sensitive.
  3. Click the Convert It button to convert the ASCII characters.
  4. The generated HEX string can be copied over to MX-760HD/MX-780HD wireless setup.
  

• http://www.csgnetwork.com/wepgeneratorcalc.html
  Please refer to the picture below for the corresponding steps. Only a portion of the screen is relevant for the example below.
  1. Enter the ASCII characters to be converted (e.g. MX780HD rocks).
     Please note that this string is case sensitive.
  2. Make sure the number of characters match the required number of ASCII characters for a given encryption size.
     
  3. • 64 bits encryption = 5 ASCII characters
     • 128 bits encryption = 13 ASCII characters
     • 152 bits encryption = 16 ASCII characters
     • 256 bits encryption = 29 ASCII characters
     In this example our encryption bit size is 128 bits, so the number of ASCII characters must be 13.
  4. Click the Calculate Custom Key button to convert the ASCII characters.
  5. The generated HEX string can be copied over to MX-760HD/MX-780HD wireless setup.