Specifications

System Considerations

DigiKeyer can be used with a wide variety of application packages. The capabilities of those packages will

have a significant impact on the level of computing power required.

“microHAM USB Device Router” must run with the application to provide an interface for the application and

control of system functions. Since logging and digital mode applications and microHAM Router are real-

time programs, system performance will be dependent on both CPU speed and the amount of available

RAM.

While microHAM Router may run on slower computers, the minimum tested system is a 450 MHz Pentium

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

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

determined. It has not been, and will not be, a priority to make it run on clunkers or discontinued operating

systems.

In order to provide optimum performance of microHAM Router, the desired logging application, Internet

connectivity and other accessory programs, the minimum recommended system is a 1.6GHz PC compatible

computer with Windows XP Home or higher, 512 MB RAM, CD-ROM, USB 2.0 port, a transceiver with CAT

capability, and logger or control software.

DIGI KEYER is also compatible with Apple Macintosh G3-350 or better running OS 10.0 or later. It is

directly supported by MacLoggerDX (www.dogparksoftware.com/MacLoggerDX.html) by Don Agro,

VE3VRW.

Hardware Specifications

USB: USB 2.0 Full speed , USB 1.1 compatible

Power consumption: USB – less than 100mA; Transceiver – less than 200mA at 13.8V (max. 16V)

Radio Port: RxD, TxD – max. 57,600 Baud

Levels: Jumpers selectable TTL, inverted TTL, open collector bus, RS232

CW: open collector, max 30V/400mA

FSK: open collector, max 30V/400mA

PTT: open collector, max 30V/400mA

Audio Out: 600 Ohm, 3V p-p max.

3dB bandwidth: 0.2 - 6KHz typical

Second harmonic: -84 dB typical

Third harmonic: -72 dB typical

D/A Sampling rates: 32000, 44100, 48000 Hz.

Audio In: 50K Ohm, max 4Vpp

3dB bandwidth: 0.2 - 6KHz typical

Absolute noise floor: -82 dBm @600 Ohms typical

Dynamic Range: 82 dB typical

A/D sampling rates: 8000, 11025, 16000, 22050, 32000, 44100, 48000 Hz.

Dimensions: W 175mm (6 7/8") x H 44mm (1 3/4") x D 101mm (4")

Weight: 1100g (2.4 lbs.)