On Saturday 19 April 2008 12:19:55 am Leskep wrote: > Hi Alan > This is using the digi port on the 857 with all dsp functions off > but I need 2400 hz of audio passband just to fit the non standard > RFSM8000 signal in and just cant get it from stock standard 857 > Maybe just put it back in my mobile and consider other > options for digital use - at least the FT920 works well on RFSM > Regards > Les
I had one of these and it was typical for me to get 2700 hz bandpass from it. Did it all the time. Are you sure the DSP is off? It sounds like the audio DSP is on and set wrong. Even if it's on, you can set the lower and upper cutoffs to min and max settings. Then you can use the IF shift to move the passband left and right in the IF stages. Perhaps the IF shift is not centered. There are three buttons to the left of the display. Hold the middle on in for more than two seconds. That is the IF shift. To start off, it needs to be centered. Move the selector knob (lower left) to get a large dot on the right hand of the freq display. If you are away from the IF center, you will get an up or a down arrow instead of a large dot. Once you get a large dot, hold it in another two seconds to set it. Then select the two submenu items for DSP lower limit and set it to as low as it will go. Do the same for the DSP upper limit and set it to as high as it will go. You should get about 3 khz bandwidth. -- In order to ensure a safe police state; the right of the people to keep and bear arms must be infringed.
