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HAM © 

2019

 

All rights reserved

 

Display Description and Basic Operation 

The display of DXP provides real time information about incoming RX audio level, its gain or attenuation,
TX output level, indicates CAT data transfer,  a clipping warning if the RX input level is too high, and 
provides data output monitoring for CW and FSK. It also serves as user interface for setting DXP 
operating parameters in SETUP menu.

There are five real time screens, three fixed and two automatic. The automatic screens are output 
monitors for CW and FSK – when data are sent, that data is shown scrolling through the display. When 
there is no more data to send the display returns to the last used fixed screen. 

Fixed screens are TX audio screen, RX MAIN audio screen for the main receiver of your transceiver and
the RX SUB audio screen for SUB receiver, if your transceiver has two receivers. The TX screen is 
invoked by pressing TX button. The number next to the VU-METER indicates the currently set output 
level as a percentage of the maximum available output from DXP.  

Adjusting TX level is individual for every radio. The golden rule is that the level should be set 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 
that the output signal is as clean as it gets without excessive IMD products and as strong as you set by 
RF output level on your transceiver.

RX MAIN screen is invoked by pressing the RX button. You can alternate between RX MAIN and RX 
SUB screens by pressing the knob. The number next to the VU-METER on these screens indicates 
digital gain or attenuation in dB of the input signal fed to the computer for audio processing in digital 
mode programs. The CLIP sign on the top right corner of the display indicates that the level of  signal 
into the DXP is too high. If you see this sign, you need to decrease the receive audio output signal level 
in your transceiver menu. Some programs like WSJT-X for FT8 mode require a certain level of noise for 
processing, use knob to adjust for the recommended level. In most other cases, setting 0-10dB gain 
provides the best performance for weak signal operation in RTTY or other digital modes. 

Pressing both TX and RX buttons at the same time enters the DXP SETUP MENU which enables to 
adjust the operating parameters of DXP. Individual SETUP MENU items are described separately in the 
DXP SETUP MENU chapter.

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Содержание DXP

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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