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micro

HAM © 

2019

 

All rights reserved

 

Serial Ports 

DXP automatically installs three (3) serial ports on host computer for connection to your favorite logging 
or digital modes  program. Installation process on 

Windows 10, macOS 

and

 Linux

 is automatic, serial 

ports use USB CDC class compatible drivers built-in to the operating system. 

These three ports have dedicated functions for: 

transceiver 

CAT

 control

FSK

 sending data for RTTY

WinKey

 CW/FSK control and sending. 

Windows 10, macOS

No action required, ports are install automatically. 
On Windows the ports are labeled “COM(x)”, on macOS “usbmodem(xxxxx)” where x stands for the 
port’s number.

Windows XP, Windows 7, Windows 8

Windows versions prior Windows 10 did not support USB CDC serial ports automatically. After 
connecting DXP, “New Hardware Detected” dialogue pops up, asking for a driver (in our case definition 
file). This definition file can be downloaded from our website:

http://www.microham.com/Downloads/DXP.inf

When DXP is plugged in for the first time and the “New Hardware” window appears, select manual 
installation (Have Disk option) and direct the operating system to the path with the downloaded DXP.inf 
file. This procedure will repeat three times, one for each serial port.

NOTE:

 Windows XP must have Service Pack 3 installed, older Service Packs have a bug in the 

USB CDC driver. Versions other than Windows XP SP3 are not supported.

Linux

No driver installation is required on Linux operating system; the new ports are labeled “ttyACMxx” where 
x stands for the port’s number. However, to make the ports accessible for applications and operate 
correctly, an initial setup step is required.  By default, most Linux distributions run a core application 
called “ModemManager.” The problem is that Modem Manager sees the creation of any /dev/ttyACM* 
device as "Oh, a new modem appeared. I am the modem manager and I have to claim exclusive access
to it by opening it right away." If you want to avoid sending useless modem data to your interface and 
radio (as you certainly do), you can do that for specific “modem” (your DXP) through udev. The 
procedure is described here:

http://linux-tips.org/t/prevent-modem-manager-to-capture-usb-serial-devices/284/2

DXP identification numbers are: VID=0483 PID=a2f6

Alternatively, if you don't need Modem Manager (usually you don't), you can uninstall Modem Manager 
in terminal:

sudo apt-get remove modemmanager

Then, to make new ports accessible to your applications you have to set permissions:

sudo chmod a+rw /dev/ttyACM*

9

Summary of Contents for DXP

Page 1: ...microHAM 2019 All rights reserved DXP microHAM www microham com Version 1 0 2019 1...

Page 2: ...ion and Basic Operation 7 4 SOFTWARE INSTALLATION 8 Understanding DXP operation 8 Audio Devices 8 Serial Ports 9 Serial Ports Finder 10 5 SIGNALS CONFIGURATION 11 6 SETUP MENU 13 Keyboard 16 CW Operat...

Page 3: ...1kHz High dynamic range 100 dB typical 95 dB minimum Extremely low noise floor as low as 10 V effective Real Time audio input level monitoring on built in display Silent operation without relays USB...

Page 4: ...gital modes program is active 7 RX AUDIO LED lights when RX Audio to logger or digital modes program is active 8 TX Sets display and right knob to adjust TX driving level Invokes and closes SETUP menu...

Page 5: ...tes 3 COMPUTER USB B connector for computer connection Uses standard USB A B cable 4 PADDLE 6 3mm paddle input connector TIP Dit RING Dash SLEEVE Ground 5 FOOTSW RCA foot switch default or PTTIN input...

Page 6: ...SETUP menu Use TX and RX buttons to find menu item 1 1 CAT TYPE Rotate right encoder KNOB to select proper CAT levels of your transceiver CIV all Icom transceivers RS232 all modern transceivers with D...

Page 7: ...for maximum RF output power at minimum or no ALC drive This can be easily accomplished by observing the RF output meter and ALC meter on your transceiver simultaneously Adhering to this rule assures t...

Page 8: ...en if still present for class driver compatibility and the level adjustment is limited to pressing TX button and turning the multi functional encoder knob on the DXP front panel Left output channel is...

Page 9: ...ed DXP inf file This procedure will repeat three times one for each serial port NOTE Windows XP must have Service Pack 3 installed older Service Packs have a bug in the USB CDC driver Versions other t...

Page 10: ...click on port you want to change Go to Port Settings tab click the Advanced button and change the COM port number at the bottom drop down box Make sure each COM port listed in Device Manager has a un...

Page 11: ...e receive audio input that is indicated by the red AUDIO RX light on the front panel To receive audio you always need to set DXP LINE DXP RX or DXP Audio Input as the receive input audio device in you...

Page 12: ...DTR LEVEL CONVERTER 1 1 CAT TYPE 1 2 CAT DTR CAT WINKEY WKv3 WINKEY DATA 1 3 WINKEY DTR CW CW CW PTT PTT FSK DTR FSK UART FSK DATA 1 4 FSK DTR FSK FSK FSK PTT DXP RX DXP AUDIO ADC AUDIO DAC AUDIO IN...

Page 13: ...T TYPE selects hardware levels of CAT interface NONE RS232 IF232 FIF232 CI V NOTE The Selection must be confirmed by pressing the knob and leaving the menu item 1 2 CAT DTR selects the function of the...

Page 14: ...ovel feature not yet supported by any RTTY package It provides exactly timed echo of transmitted FSK data back to the logger in order to accurately and instantly control T R switching PTT control The...

Page 15: ...enu Disconnect and reconnect the USB cable to restart DXP verify the correct WinKey firmware version is displayed on DXP boot screen If you run the update without setting this menu item to YES the upd...

Page 16: ...is indicated on the display and also on the CAPS LOCK LED on the keyboard OFF for CW ON for FSK There are two modes of keyboard operation controlled by the 5 2 TYPE AHEAD menu item if NO is selected...

Page 17: ...er program is connected will also stop communication with the logger program However in Standalone Mode WinKey can play back stored messages simply by pressing one of the buttons on top of DXP To stor...

Page 18: ...e USB FLASH drive from DXP and continue operating If the update process fails the LEDs will indicate the possible cause of failure PTT LED flashes dxp upd file not found in the root directory of USB F...

Page 19: ...2 CI V RS 232 CW open collector max 30V 400mA FSK open collector max 30V 400mA 5 6 7 bit data 1 1 5 2 stop bits up to 300 Baud PTT open collector max 30V 400mA PA PTT optoMOS max 300VAC VDC 0 1A Foot...

Page 20: ...pay return shipping What is not covered This Limited Warranty does not cover 1 correction of installation or software errors in the user s computer s 2 damage caused by misuse negligence user modific...

Page 21: ...this device must accept any interference received including interference that may cause undesired operation European Union Declaration of Conformity microHAM s r o declares that the products Product...

Page 22: ...n collector 4 CW CW output open collector 12 N A Not connected 5 FSK FSK output open collector 13 AUDIO OUT S Radio AUDIO input signal 6 AUDIO OUT GND Radio AUDIO input ground 14 AUDIO IN MAIN S Radio...

Page 23: ...fety ground often exhibits excessive noise between power outlets often due to other equipment powered from the same branch circuit It is always better to avoid this source of noise interference It is...

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