Specifications

INHIBIT OUT: When a pin is configured as inhibit output, it can be connected to the transceiver

inhibit ("LINEAR") input with the proper driver to assure completely safe, hot switch free

operation even if the transceiver is operated in VOX or is switched to transmit by CAT

command. MK2R automatically generates an INHIBIT signal on beginning of each

transmission for a PTT Delay period defined on PTT/FSK tab. The radio remains switched

to transmit but does not generate power while inhibit signal is active.

For proper operation of INHIBIT OUT, the radio PTT output must be connected to the MK2R

PTT IN jack.

INHIBIT IN: When a pin is configured as an inhibit input, an external device can lock out the radio

as long as the input is active. This interface can be used with external devices like antenna

controllers, power amplifiers or any other device that provides a control output when the

device requires "no power" from the radio.

System Considerations

MK2R and MK2R+ can be used with a wide variety of software applications. The capabilities of those

packages will have a great deal of influence on the level of computing power needed to utilize MK2R.

DOS Applications: MK2R and MK2R+ can be used as a traditional SO2R controller with DOS loggers like

CT, TRlog and NA. In this mode, MK2R requires a PC compatible computer running Windows 2000, 64

MB RAM, CDROM, and USB 1.1 port for configuration purposes only. MK2R is controlled through the LPT

input in “classic” mode. The advanced features provided by microHAM Router are not available in DOS

Mode. However, if the DOS application is capable of operating in a Windows “DOS box” or is run on a

separate computer, a limited subset of advanced features may be available.

Windows Applications: When used with Windows based contest logging applications like CTWin, N1MM

Logger, Win-Test, and WriteLog or Windows based general logging applications like DXBase 2007,

DXLab Suite, DX4WIN, Logger 32 and others, the microHAM control and interface application “microHAM

Router” must run along side the application program. Since both the logging programs and microHAM

Router are real-time applications, system performance will be dependent on both CPU speed and the

amount of available RAM.

While microHAM Router will run on slower computers, the minimum tested system is an 800MHz Pentium

III or Celeron, Windows 2000, 256MB RAM, CD-ROM, and USB 1.1 port. Whether it can run as designed

on slower speed machines and leave sufficient free resources for application programs has not been

determined. It has not been and won't be a priority to make it run on clunkers or discontinued operating

systems. Two sound cards are required for full functioning with MK2R. A parallel port is desirable for

“classic” interface applications.

In order to provide sufficient performance for simultaneous operation of microHAM Router, logging

application, Internet connectivity and other accessory programs, the recommended system is a 1.6GHz PC

compatible computer with Windows XP Home or higher, 512 MB RAM, two sound cards (MK2R only), CD-

ROM, root USB 2.0 port, and two transceivers with computer ports.

Note: Windows XP Professional 64-bit edition and Windows Vista are not presently supported.