![]() ![]() You should expect the Tx VFO dial frequency to change when you select different Tx audio offsets, this is normal behaviour. ![]() This both allows you to transmit at any selected offset and also greatly attenuates any audio harmonics generated by overdrive of the transmitter's Tx audio circuits. Selecting on of the "Settings->Radio->Split Operating" options in WSJT-X allows the software to adjust your rig's Tx VFO dial frequency *and* the Tx audio tones to keep the tones within the optimal part of your transmitters bandwidth. Please explain what happens when you say "Otherwise the TX drops". I don't think there's anything similar reported here. Another observation is that although I determine on the radio the TX and RX frequencies for split, the radio changes to a frequency 0.50 below for the TX. this modification allows transmitter to transmit on whole frequency range. icom 756pro2 service manual portugues the icom ic- 756 pro ii is the worthy successor of the famous icom 756, icom 756 pro, and covers all nine hf ham bands plus 6 meters ( receive from 30 khz - 60 mhz). I noticed that now I can only maintain the TX period using Split mode. service manuals, schematics, eproms for electrical technicians. Until a few months ago, I used it without Split and it worked very well. I use an old Icom IC-756PROII and WSJT-X for FT8. In the IC-756Pro III, it is possible to program each of the three settings individually with the following preset cutoff frequencies: Lower -6dB point: 100, 300 and 500 Hz., Upper -6dB point: 2.5, 2.7 and 2.9 kHz.On 13:55, CLOVIS VONGHON via groups.io wrote: Mode Selection The Following Modes Are Available In The Ic-756Pro. The lower and upper -6dB points of the transmitted audio-frequency response are fixed for each setting. Icom IC-756PRO Manual Online: receive and transmit, Mode Selection, Twin Pbt Operation. The IC-756 Pro II provided three selectable TOBW settings: WIDE/MID/NAR. Soft and sharp filter shapes can be selected in both SSB and CW modes independently, Programmable SSB transmit bandwidth, microphone equalizer, manual notch function, digital twin pass band tuning (PBT), all mode, including PSK31. 32-bit floating point DSP Digital IF filter with 51 selectable bandwidths. Real-time spectrum scope with mini-scope. 121 position microphone equalizer.Ĭovers the nine HF bands and 60-meter plus 6 meters. Soft and sharp filter shapes can be selected in both SSB and CW modes independently, microphone equalizer, manual notch function, digital twin pass band tuning (PBT), all mode, including PSK31. 32-bit floating point DSP Digital IF filter with 41 selectable bandwidths, microphone equalizer, manual notch function, digital twin pass band tuning (PBT), all mode, including PSK31.Ĭovers the nine HF bands plus 6 meters. All successors required no additional filters.Ĭovers the nine HF bands plus 6 meters. 4.9 inch monochromatic TFT dot matrix LCD display. ![]()
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