Ten Tec Omni VII
I have been looking over receiver specifications here. I am really interested in the layout of the Ten Tec Omni VII.
It is a 3 IF stage receiver. The main roofing filter is 20kHz. Then, apparently, they put in a 6 and 2.5kHz filter in the second IF stage and have provisions for optional 500hz and 300hz filters.
I found this to be very interesting - Ten Tec calls this set up their "distributed roofing filter architecture" (second sentence in the second paragraph).
If filtering is taking place in the second stage, how can that be called roofing? That would be like calling the top floor of a 2 story house the "roof", would it not?
My take on roofing is that it applies to the FIRST stage - it is the main line of defense for the rest of the circuitry in the rig.
I am sure the second stage filtering works. It would surely smoke the filtering on my TS-2000. I wonder how well it really works in real-world use, though.
It is a 3 IF stage receiver. The main roofing filter is 20kHz. Then, apparently, they put in a 6 and 2.5kHz filter in the second IF stage and have provisions for optional 500hz and 300hz filters.
I found this to be very interesting - Ten Tec calls this set up their "distributed roofing filter architecture" (second sentence in the second paragraph).
If filtering is taking place in the second stage, how can that be called roofing? That would be like calling the top floor of a 2 story house the "roof", would it not?
My take on roofing is that it applies to the FIRST stage - it is the main line of defense for the rest of the circuitry in the rig.
I am sure the second stage filtering works. It would surely smoke the filtering on my TS-2000. I wonder how well it really works in real-world use, though.
posted by Steve at
12:29 PM
3 Comments
