Hardware Specifications - microHAM microKEYER Manual

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, (RTS, CTS) – 57,600 baud max.
Levels: TTL, inverted TTL, open collector bus, RS232
CW: open collector, max 30V/400mA
FSK: open collector, max 30V/400mA
Supports 5/6/7/8bit data length, 1/1.5/2 stop bit, up to 300 Baud
PTT1: open collector, max 30V/100mA
PTT2: open collector, max 30V/400mA
PA PTT: selectable by rear panel switch
Open collector, max. 48V/0.8A
Relay contact, max. 48V AC/DC @ 1 A
Foot Switch: active when closed to ground, max load: 5 mA
Radio AF OUT: 600 Ohm, max 1Vpp
3dB bandwidth: 0.2 - 6KHz typical
Insertion loss: 2-3dB typical
Computer LINE OUT: 600 Ohm, max 1Vpp
3dB bandwidth: 0.2 - 6KHz typical
Insertion loss: 3dB typical (additional 6dB attenuator is included for best IMD)
Computer MIC IN: signal and signal ground directly switchable to the MICROPHONE input (jumper
selectable preamplifier for dynamic microphones)
Radio MIC IN: signal and signal ground directly switchable to the MICROPHONE input. All other control
wires are routed from RJ45 to the radio microphone input. All functions of the OEM microphone are
supported as if it were connected directly to the radio. .
Dimensions: H 44mm (1.73") x W 175mm (6.89") x D 85mm (3.35")
Weight: 1100g (2.43lbs)
microHAM © 2010 All rights reserved

10 - Hardware Specifications

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