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11 - SPECIFICATIONS
DIGI KEYER II is a multi-mode interface between computer and transceiver. It has been optimized for
amateur digital modes and includes a high performance USB sound processor.
DIGI KEYER II is connected to the computer using a single A-B USB cable which is included.
The transceiver and DIGI KEYER II are connected by single radio cable terminated on one side by a
DB15M and on the other side by the appropriate plugs for the specific transceiver. The cable carries power
for DK II, audio, CAT control and keying. The appropriate transceiver interface cable is specified when DIGI
KEYER II is purchased.
If a Windows PC running the "microHAM USB Device Router" program is connected, DIGI KEYER II works
as a computer interface and sound card. It transfers all control signals generated by the application
program between the computer and transceiver. Software compatibility is provided by using virtual serial
ports. Router monitors these virtual ports and transfers any data or commands by USB to the micro
controller in DIGI KEYER II.
DK II processes this data and sends it to the physical ports of transceiver as CAT, CW, and PTT functions.
The USB sound processor in DIGI KEYER II independently provides analog to digital conversion of audio
from the transceiver and transfers it via USB to the computer where the operating system processes that
data as a “sound card.” The USB sound processor also receives digital audio from any applications running
on computer and converts that data into audio signals to modulate the transceiver.
microHAM Device Router is not required in order to enable the USB sound functions. The USB sound
processor is supported directly by Windows, Mac OS X, and LINUX. It may be used by any application
compatible with those operating systems.
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
CI-V Port: open collector bus – max. 9600 baud
CW: open collector, max 30V/400mA
FSK: open collector, max 30V/400mA
–
supports 5/6/7 bit data, 1/1.5/2 stop bits, up to 300 baud
PTT: open collector, max 30V/400mA
PA PTT/LNA PTT: selectable by internal jumper
–
open collector, max. 45V @ 0.8A
–
relay contact, max. 48V AC/DC @ 1A
Foot Switch: active when closed to ground, max load: 1 mA at 5V
PTT IN: active when closed to ground, max load: 1 mA at 5V
Audio Out: 16bit, max 48000sps, Zout: 600 Ohm, 1.5V p-p @max. settings, Left channel, AC coupled
Audio In: 16bit, max. 48000sps, Zin: 50K Ohm, max 4V p-p, dual channel (Stereo),
60mV p-p for full scale @max. settings, AC coupled
Dimensions: W 165mm (6 1/2") x H 44mm (1 3/4") x D 110 mm (4 3/8")
Weight: 1100g (2.4 lbs.)
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