MicroHAM MK2R Bedienungsanleitung PDF herunterladen (Seite 2)

Introduction

The Automatic Band Decoder continuously decodes your transceiver's band changes and

provides a separate output for each of the nine bands of your rig. By connecting an external

antenna switch to the decoder's output, automatic and correct antenna selection is

accomplished.

The Band Decoder is primary designed for Yaesu radios with band output signal BCD coded

at TTL voltage levels.

However, it can be used with any other device that uses the same method of band coding at

TTL voltage levels (for example Microham MK2R or LPT computer port). Then the computer

running software may send the current band information to the computer's LPT port or to an

auxiliary output at Microham MK2R. Many computer logging programs support this feature

now, which can be useful if you have a Kenwood or Icom transceiver. Consult your

transceiver and software manuals on how to interface your radio to the computer and how

to enable the software's antenna control feature.

If you want to use an another kind of controller (like Arduino, RaspberryPI etc.), then the

different bands are coded as follows:

Binary code Band

0001 160m

0010 80m

0011 40m

0100 30m

0101 20m

0110 17m

0111 15m

1000 12m

1001 10m

Table 1.

The Band Decoder provides source driver outputs, which provide a source of 12Vdc for the

“hot” side of external relays (common point for the relays is a ground or minus pole).

All of the antenna switches designed by OK2ZI are controlled by this way, but you can

control many other products with the same method of switching.

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MicroHAM MK2R Bedienungsanleitung Seite 2