Odd Tx signal behavior..... - question

[foss1997]

[Mike Roberts]

Scott

One thought. What is your port setup in your system BIOS (i.e. the scary bit when you press DEL while your machine is booting up) I think the parallel port has to be set to 'ECP+EPP'. This is what mine is set to and the parallel interface works OK.

Also the calibration bars are stationary if no signal is seen and move violently when there is a signal but calibration has not been set.

Cheers

Mike

[Steve Lewin]

I have once seen that behaviour where a signal appears only when the trainer switch is toggled. In that particular case the lead was wired with the signal lead connected to Pin3 instead of Pin2.

Steve

[foss1997]

thanks for the responses!

I will check my bios settings soon. I checked them a while ago and tried it but nothing happened. Since then ive changed a few other things and then all of a sudden the bars started to move while toggling the switch (again, the did not always work, but I was able to get movement VERY sporadicaly if I toggled it).

If the ecp+epp does not work I will look more into the actual physical setup of the cord.

Time to mess with bios!

Scott

ps Is there a specific way you guys are using your TX's? Turned on, ppm, RF module out anything else? Do you have to hold the trainer switch on (mines spring loaded)?

[Mike Roberts]

Scott

The trainer switch is only to switch your transmitter to take the signal from another transmitter. It is spring loaded to be fail safe.

As suggested by Steve - also check your lead connection. You will find the correct setup on my website at RC Projects>FMS>IRQ interface>Transmitter connections

Cheers

Mike