Micro KEYER II Features & Functions

Figure 1: microKEYER II block diagram

• No serial or parallel port required:

- just one USB cable between your computer and microKEYER II

• Complete "Computer Radio" electrical isolation

- transformer isolation between sound circuits and radio - optical isolation between USB port and of ALL digital signals: Radio Control, CW, PTT, FSK, PA PTT, & LNA PTT

• Standard Sound Device - no custom drivers:

The microHAM CODEC is an industry standard device recognized by Windows, Apple OS 10 and LINUX. There are no custom device drivers to install and no compatibility problems with your favorite applications.

• Ultra low noise:

- The sound circuits are designed with special attention to low noise - The receive noise floor in microKEYER II is lower than any value priced sound card or similar amateur product. - Dynamic range rivals that of professional products. - Special circuit design maintains full dynamic range and low noise floor with all radios - both high level and low level outputs.

• Compatible with most standard Windows software

- special microHAM USB Device Router creates as many virtual COM ports as needed to function fully with your favorite programs - customizable presets allow instantly changing configuration when switching programs

• Integrated control port for all radios: CI-V, FIF-232, IF-232, RS-232

- fully supports Elecraft, Icom, JRC, Kenwood, Ten-Tec, and Yaesu radios

• Dual Channel Receive:

- supports dual receive with transceivers like the Icom 7800, Yaesu FT-9000, FT-2000, FT-1000D, FT-1000MP, Mark V, Kenwood TS-2000, TenTec Omni, and Elecraft K3. - independent, front panel level controls for each receiver

• Front Panel Level Adjustments:

- Pots for Transmit level, Main Receiver level and Aux receiver level - no need to fumble with Windows Mixer to control levels

• Integrated K1EL WinKey™ chip with extended capabilities

- front panel speed knob - nine (9) user programmable memories - internal paddle buffer for improved reliability.

- PS/2 keyboard support for direct CW generation. - PS/2 keyboard/keypad support for instant CW message playback - PS/2 keyboard/keypad CW work without a computer connection - auto PTT - selectable side tone - all parameters are stored in EEPROM and reloaded on power up

• FSK keying output

- capable of sending 5/6/7/8 bits and 1/1.5/2 stop bits - PS/2 keyboard support for direct FSK transmission without a computer - PS/2 keyboard support for instant FSK message playback - PS/2 keyboard works without a computer connection

• Unique Microphone/Sound Card/Radio audio switching

- configurable audio priority microphone routing for SSB/Contest/SSTV - two audio outputs, one for radio front MIC IN, second for rear LINE IN - front panel audio level controls for setting computer and radio levels

• Independent keying buffers for Power Amplifier and LNA switching

- extended range solid state output for low voltage T/R lines or QSK - relay isolated output for vintage PA with negative voltage T/R lines

• Footswitch input with programmable functions

- programmable PTT activation delay in 1ms steps - selectable muting of CW and/or FSK when footswitch is closed

• Hot Switch protection with user defined timing

- Transceiver PTT input for hotswitch free VOX operation - T/R sequencer for PTT keying outputs

• Strong immunity from RFI

- integrated chokes and filters for best RFI immunity - advanced shielding and circuit design to suppress RFI generation

• Input/Output connectors

Computer: USB, Radio: DC37, 3.5 mm & RCA, Paddle: 6.2 mm Microphone: RJ-45 and 3.5 mm(1/8"), Footswitch: RCA PS/2: MiniDIN6, iLink: MiniDIN6, Footswitch: RCA, PA PTT: RCA

• Metal/Aluminum case, powder coated and silk screened
• Free firmware/software upgrades via internet

Specifications

USB: USB 2.0 Full speed , USB 1.1 compatible

Power consumption: USB: up to 100mA External: 400 mA (16 V max)

Radio Port: RXD, TXD, (RTS, CTS) max. 57600Bd - levels: TTL, inverted TTL, open collector bus, RS232

Aux Port: TTL RxD, TxD - 9600 baud maximum

CI-V Port: open collector bus - 9600 baud

CW: open collector, max 30V/400mA

FSK: open collector, max 30V/400mA - supported 5/6/7/8bit data length, 1/1.5/2 stop bit, up to 300 Bd

PTT1: open collector, max 30V/100mA

PTT2: open collector, max 30V/400mA

PA PTT: selectable by rear panel switch - open collector, max. 48V/1.5A - relay contact, max. 125VAC/2A 60VDC/2A

LNA PTT: selectable by rear panel switch - open collector, max. 48V/1.5A - relay contact, max. 125VAC/2A 60VDC/2A

Foot Switch: input, active when closed to ground, max. 5 mA

Audio Out: - single channel (left) - output impedance:600 Ohm - output level: 4V p-p (max)

- AC coupled - 3dB bandwidth: 0.2 - 6KHz typical

Audio In: - dual channel (stereo) - input impedance: 50k Ohm - input level: 4V p-p (max) - AC coupled - 3dB bandwidth: 0.2 - 6KHz typical

Dimensions: W 232mm (9.125") x H 44mm (1.73") x D 105mm (4.125")

Weight: 1300g (1.875 lbs)

Requirements:

Minimum - 800 MHz IBM PC compatible computer with Windows 2000, 456 MB RAM, CD-ROM, USB1.1 port, Transceiver, logger or control software (any)

Recommended - 1.6 GHz PC with Windows XP or higher, 512 MB RAM, CD-ROM, CD-ROM, USB2.0 port, Transceiver with computer port, CW paddle, PS/2 keypad, logger or control software (any)

Note: Windows 98 (all versions) is not supported.

Front panel

1. Ext Mic Connection for headset mic, e.g. Heil ProSet 3.5 mm stereo - jumper select TIP - Dynamic Mic RING - Electret Mic/Bias SHELL - GND
2. CW LED flashes with CW output
3. PTT1 LED lights when PTT1 (microphone connector) is active.
4. SC LED lights when Soundcard is generating PTT.
5. FSK LED flashes with FSK output.
6. PTT LED lights when PTT2 (transceiver accessory connector) is active.
7. LINE LED indicates "Line input" (receiver audio) is active
8. POWER LED lights when +13.8V is applied (power switch on).
9. CW Speed WinKey speed control.
10. TX Audio level to transmitter.
11. RX Main Audio level from Main Receiver (left channel).
12. RX Sub Audio level from Sub Receiver (right channel).

Rear panel

1. DC 13.5V Power Supply - 2.1 x 5.5 mm coaxial jack, center is +
2. MONI Output for monitor speaker
3. MIC RJ45 jack for microphone. If your original radio microphone ends with connector other than an RJ45 plug, use the adapter from cable set.
4. RADIO DB37F connector for radio interconnections.
5. MKD Not Used.
6. USB USB B connector for computer connection. Standard USB A-B cable.
7. CI-V Auxiliary CI-V output for controlling external devices using Icom transceive protocol
8. iLINK MiniDIN-6 for external control applications.
9. PTT IN Transceiver PTT Out (Send) connection for sensing when transceiver has been switched to transmit by VOX or CAT PTT.
10. PA PTT PTT output for Power Amplifier. RCA jack TIP - Signal SHELL - GND
11. GND Terminal for connection to station ground.
12. SUB RX Audio input from transceiver (second receiver - right channel).
13. POWER Power Switch
14. PADDLE 6.3mm (1/4") stereo female for paddle input. TIP - DIT RING - DAH SHELL - GND Paddle sense can be reversed by software
15. PS/2 MiniDIN6 for PS/2 keyboard or PS/2 keypad.
16. FOOTSW RCA foot switch input. Active when closed to ground. TIP - Signal SHELL - GND
17. LNA PTT PTT output for controlling Low Noise Preamplifier or Receive antenna switching. RCA jack TIP - Signal SHELL - GND