User manual ICOM IC-775DSP

[. . . ] The Mode control carousels between the different available modes by short presses; AM/FM and USB/LSB are selected with long presses. Any modes that are not needed can be removed by a menu choice, so if you only need AM and SSB you don't have to toggle through RTTY and CW. The bandwidth is selected by toggling the "FIL" function key below the display. The IC-775DSP has separate controls to select Noise Reduction, Noise Blanker, Auto-Notch and Manual Notch. [. . . ] There are pot-like controls for Audio Gain and RF Gain/Squelch, and for Twin PBT which double as Memory Selector and RIT. For visually impaired users there is a voice synthesizer button for frequency, mode and S-meter reading (selectable). And some HAM related controls and functions I haven't paid much attention to. The tuning knob is well made with adjustable friction. Sensitivity While I set up and warmed up the signal generator I compared it with the very sensitive IC-703 and became quite optimistic. On the middle part around 0. 9, and the lower part around 1. 0 V down to 1. 3 on 510. These figures are in fact 3-5dB better than my friend's IC-775DSP. The answer is rather embarrassing for Icom and it was Dallas Lankford who found it. He found that if the preamp is disengaged, and a Norton push-pull preamp is placed between the antenna and receiver instead, the IC-775DSP will remain its excellent sensitivity at least down to 200 kHz. The receiver was very quiet when I tuned the LF band with the preamp on. I noticed this down to about 200 kHz, when the difference tended to decrease. Effective use of the MNF may require some training, but the function alone makes my IC-775DSP the receiver of choice when interference is very tough. For the IC-703 I bought and built John Hansen's Millenium QSY'er. Its functions are rather basic but it works well as a frequency input device. But the IC-775DSP has a microphone which doubles as a remote/keyboard. It contains most of the functions one needs, including frequency input, mode change, filter change, up and down tuning and memory functions. The keypad has a rubberised feel and need a distinct pressure to make contact. It works OK as a remote keypad but the spiral cord is rather thick (as is usual with this kind of equipment). First, press a button named "Finp/Ent" (probably short for "Frequency Input/Enter"), then the frequency including trailing zeros (100's and 10's Hz), then press "F-inp/Ent" again. So, keying 1470 requires eight key presses while the Millenium QSY'er requires only five. The up/down buttons come in very handy though so I will probably use the microphone instead of buying another Millenium QSY'er. [. . . ] So, keying 1470 requires eight key presses while the Millenium QSY'er requires only five. The up/down buttons come in very handy though so I will probably use the microphone instead of buying another Millenium QSY'er. But the audio from the external speaker jack and headphone jack is somewhat hissy. I connected my ELPAF filter to the audio output and that cured the hiss problem. [. . . ]