added some files and photos

...ver/Spectrum Instrumentation m4i.4451/m4iset_extrig_rms.c

Console/Receiver/Spectrum Instrumentation m4i.4451/readme.md

...Spectrum Instrumentation m4i.4451/rec_m4i_fifo_tdfilter.f

.../Spectrum Instrumentation m4i.4451/rec_m4i_tdfilter_rms.f

...smitter/Spectrum instrumentation m4i.6622/instructions.md

...ransmitter/Spectrum instrumentation m4i.6622/m4iset_8ch.c

...mitter/Spectrum instrumentation m4i.6622/pex_m4i_8ch_CP.f

...r/Spectrum instrumentation m4i.6622/pex_m4i_8ch_OP_heat.f

...mitter/Spectrum instrumentation m4i.6622/pex_m4i_8ch_WC.f

...e/Transmitter/Spectrum instrumentation m4i.6622/readme.md

...e/Transmitter/Spectrum instrumentation m4i.6622/wcvec.dat

Photos/Figure9 - ptx testbed.jpg

Photos/testbed_setup_unconnected.jpg

README.md

RFPA/24VpowerSupply.PDF

testbed_photo.jpg

testbed_photo.png