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Carl,
I have a 286/CGA with an Sigma Delta ckt. board and software that makes it into a pretty good spectrum analyzer(of Bill DeCarle fame) . However the range is limited to around 3KHZ max and now with modern A/D S/D chips out would like to make an Spectrum Analyzer that see's out to at least 20KHZ. I'm new at programming, but fortunately for this project am getting on board with Assembler which I want to master. So far besides good ol' DOS debug, I have Turbo Assembler 4 and MASM 5.1 at my disposal. Know of any assembler code that would be close? Any clues would be appreciated and I have friends that could help me optimize the assembler code for max speed on the 286, so that's not a problem . I've built and tested the transmitter portion of my Magnetic Induced Polarization detector and am wiring up the receiver section which starts out with a dual gate mosfet amp/mixer to a LPF and into an LM 386. Being an old Amatuer Radio Op. I know how well the human brain can detect low level CW signals in noise (up to -15db below the noise floor) compared to a logic gate that ignores anything that's equal to the noise floor at best. The idea is to use the mixer as a BFO which in of itself helps detect a pulsed carrier which is what you have in a PI detector. What say ye Carl and friends?
Randy Seden WD6ELU
I have a 286/CGA with an Sigma Delta ckt. board and software that makes it into a pretty good spectrum analyzer(of Bill DeCarle fame) . However the range is limited to around 3KHZ max and now with modern A/D S/D chips out would like to make an Spectrum Analyzer that see's out to at least 20KHZ. I'm new at programming, but fortunately for this project am getting on board with Assembler which I want to master. So far besides good ol' DOS debug, I have Turbo Assembler 4 and MASM 5.1 at my disposal. Know of any assembler code that would be close? Any clues would be appreciated and I have friends that could help me optimize the assembler code for max speed on the 286, so that's not a problem . I've built and tested the transmitter portion of my Magnetic Induced Polarization detector and am wiring up the receiver section which starts out with a dual gate mosfet amp/mixer to a LPF and into an LM 386. Being an old Amatuer Radio Op. I know how well the human brain can detect low level CW signals in noise (up to -15db below the noise floor) compared to a logic gate that ignores anything that's equal to the noise floor at best. The idea is to use the mixer as a BFO which in of itself helps detect a pulsed carrier which is what you have in a PI detector. What say ye Carl and friends?
Randy Seden WD6ELU
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