User manual KENWOOD TR-7930 SERVICE MANUAL

[. . . ] This transceiver features a Digital Signal Processing (DSP) unit to process IF and AF signals. By taking maximum advantage of DSP technology, the TR-7930 transceiver gives you enhanced interference reduction capabilities and improves the quality of audio. As you learn how to use this transceiver, you will also find that Kenwood is pursuing "user friendliness". in Menu mode, you will see scrolling messages on the display, telling you what you are selecting. [. . . ] · While playing back the messages, you can also adjust the keyer speed by pressing [KEY (DELAY)] and turning the MULTI/CH control. · To cancel transmission, press [CLR]. FREQUENCY CORRECTION FOR CW If you operate both SSB and CW modes, you would sometimes use SSB mode (USB or LSB) just to watch and listen to CW signals. It is fine just to monitor those CW signals but you have experienced that changing the mode from SSB to CW results in losing the target CW signal. This is because the frequency on the display always shows the true carrier frequency for all modes. If you want the transceiver to shift the reception frequency to trace the receiving CW signal when changing the mode from SSB (USB or LSB) to CW, switch this function ON. The transceiver shifts the reception frequency when changing the mode from SSB to CW, so you can still hear the target signal and instantly transmit the signal in CW without adjusting the frequency. 1 Press [MENU], then press [Q-M. IN]/ [Q-MR] or turn the MULTI/CH control to select Menu No. 3 Press [MENU] to exit Menu mode. 35 7 COMMUNICATING AIDS AUTO CW TX IN SSB MODE If you operate both SSB and CW modes, you can configure the transceiver to change the operating mode from SSB (USB or LSB) to CW and then transmit in CW mode automatically when you operate the CW keyers. The mode automatically changes from USB to CW and LSB to CWR, regardless of the setting for Menu No. Therefore, when the CW signal is received in SSB mode, you can operate the paddle or keyer to immediately communicate CW with another station. 1 Press [MENU], then press [Q-M. IN]/ [Q-MR] or turn the MULTI/CH control to access Menu No. Additionally, because of the narrow bandwidth (31. 25 Hz) you can even use PSK31 on congested frequencies. Another merit to PSK31 is that it can be enjoyed with a simple antenna and low transmit power. Using the sound function of your PC along with PSK31 software, many amateur radio operators enjoy PSK31. · When managing PSK31 using the sound capability of a PC, use SSB mode. · Refer to "EXTERNAL AUDIO SETTINGS" {page 58} for Audio Settings. For further information, consult reference books about Amateur Radio. · If necessary, access Menu No. The audio output level of ANO (ACC2 connector/ pin 3) changes {page 65}. The AF control cannot be used to adjust the audio level for your MCP. 6 Some stations may be operating in Reverse shift. In this case, press and hold [CW/FSK (REV)] to reverse the shift (the upper sideband is used). · "FSR" appears. · Traditionally, the lower sideband is used for FSK operation. "FSK" appears. 7 Follow the instructions provided with your MCP and enter a command from your computer to transmit. [. . . ] In addition, this function resets all the settings that you customized, to the factory defaults (i. e. - menu settings, antenna tuner preset data, etc. ). · A confirmation message appears when performing the Full Reset. Otherwise, press any other key to cancel the Partial Reset and return to normal operation. · All frequencies, modes, memory data, adjustment values, and AT preset data are set to the factory default values. VFO RESET Perform a VFO Reset if a key or control does not function according to the instructions in this manual. [. . . ]