A few more notes about this subject…
1. The power spike problem can be “avoided” through keeping the xmtr power low at the beginning of each cycle and then gradually increasing it. I have bit of auxiliary code in Xojo which can do this, ramping power up during the first 5 seconds of the cycle. Would anyone care to comment on how this variable power would affect the FT8 throughput? 2. I would like to know more about how WSJT-X uses the serial port. By experimenting I found that Xojo can “grab” the serial port, interact briefly with the radio, then drop the serial line and WSJT-X (with rare exceptions) never notices. For example, my auxiliary app can open the same serial port which WSJT-X is using to control the radio, send some commands to the radio, stay connected for 100 ms. or so, then close that connection. WSJT-X seems none the wiser as long as the interruption is brief. When does WSJT-X access the serial port and when is it possible for another app to use it without causing a conflict? 73, Ed W1KOK > On Apr 12, 2019, at 2:36 PM, Ed Stokes <w1...@comcast.net> wrote: > > Hi Bill, > > Another extremely helpful comment. > > As you may have noted in my previous post, I am not co-located with the > equipment. > > Is it possible to access this menu via the serial interface? > > Otherwise, I will have to wait until next month when I am at home again and > have physical access to the radio. > > Thanks. > > 73, Ed > W1KOK > > >> >From W8JI.com <http://w8ji.com/>, maybe 5000 has similar adjustments. If >> >the IF Transmit Gain >> was too high the 1000 would exhibit huge power spikes on key down or >> pressing the mike PTT button. >> >> Transmit Gain Menus >> >> The FT-1000 MK V has hidden transmit gain menus. They are accessed by >> pushing and holding FAST and LOCK while turning the POWER switch on. Both >> of my MK V's and every MK V serviced here has had the TX IF gain set too >> high. This causes first character clicks on CW and spits and splatter on >> SSB. Here is how to correct the IF gain to prevent ALC clipping on leading >> edges of CW and voice: >> >> Press and hold FAST and LOCK before and during initial POWER on. >> >> Press FAST and ENT at the same time. You are now in the MENU's and the >> display should say "0-1 GrPI-cH". >> >> Turn the VRF/MEM CH counter-clockwise to 9-2. The display should say "t iF >> - GA in" This is the transmit IF gain menu. >> >> Turn the SUB VFO knob clockwise one position to " t iF - 018". This is the >> 1.8MHz transmit IF gain. >> >> Press the ALC/COMP meter selector until the bar graph says "ALC". Set RF >> PWR knob to full power. >> >> With the radio on CW and a 50 ohm dummy load connected, close the key and >> adjust the MAIN VFO-A knob until the ALC display is about 75-85% of full >> scale on the illuminated bar marked "ALC". >> >> Press the next band button (3.5), make sure the radio is still on CW, and >> turn the SUB VFO-B knob clockwise one band to "t iF - 035". >> >> Again adjust MAIN VFO-A until ALC is at 75-85% of full scale. >> >> Repeat this process through all bands. >> >> Most radios I have tested require a setting of 2 to 4 on TX IF gain, with 3 >> being the most common setting. >> >> This change will reduce SSB bandwidth and distortion. It will also reduce >> keyclicks and annoying thumps on the leading edge of each Morse character. >> >> Hope this helps; >> >> Bill W2PKY >> >
_______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
