KIF700 Keyboard Interface

The KIF 700 is a small self contained unit that allows a standard PS2 keyboard to be used to enter text while using APRS on a Kenwood TM-D700 Radio.

The module has three connectors, these are for connecting to the radio microphone socket small patch lead included, connecting the microphone (if required) and a standard PS2 Keyboard connector.

The module converts the signals from the keyboard into DTMF tones (and sequences of tones) as required to effectively enter text into the D700.

All characters that can be used by the D700 are catered for, including a limited number of control and user defined text strings.

Installation

  • Connect the KIF700 to the radio microphone socket using the supplied patch lead (a longer lead can be locally manufactured if required).
  • Connect the microphone (standard or DTMF) to the KIF700 if required.
  • Connect a PS2 Keyboard to the KIF700.
  • Set up the microphone programmable keys (this must be done of the unit will not function).

    Limitations

    The maximum current available to operate the keyboard is 40mA.
    Some key characters require multiple DTMF codes, these can fill the buffer if you type too quickly.

    Other Modes

    Apart from the tet entry facility - the is a command mode where some control of the radio is possible and strings of text can be prgrammed into the KIF700 for use with the F keys. This set up data is maintained when power is removed from the KIF700.

    Initial Experience

    So far I have only tested the unit in the text mode - and it really does work very well, it makes entering text far easier then using the DTMF microphone. I havent tried the control mode - or programming the F keys, these would seem to be additional bonus features which I may try at a later date.

    One thing to notice is the radio often powers up in CTRL mode with the KIF700 attached, and its necessary to press the CTRL soft button on the front of the radio to return to normal operation. Other problems are that with some characters requiring a lot of tones, the user can, if typing fast fill the keyboard buffer, this is not a major promblem and can be easily fixed by typing a little slower.

    Impression so far

    I was keen to get one of these units, being lucky to have a play with a preproduction version, and I was lucky enough to get the first production unit! So far even just using text mode it is well worth having, the optional matching keyboard which is also available (reduced size without the numeric keypad and extra cursor keys) is also well recommended!

    I will add further comments - info and piccies as time progresses......

    The KIF700 is designed and made by GEEDEV and can be purchased from
    The Shortwave Shop - Telephone 01202 490099

    Francis G6VUI.
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