- usb.sch: use P0.2 as board revision ID pin
- atrf.sch: label feed line
- atusb.brd: set feed line width via design rule, not as user size
- atusb.brd: increase feed line width from 18 mil to 19 mil (it should be
58 mil, but we don't have room for more)
- atusb.brd: bumped version number to 20101202
- atusb.brd: put version number on PCB
- atusb.sch, usb.sch, atrf.sch: bumped version number to 20101202
- atusb.brd: moved traces into USB plug such that they coincide with
thermal relief
- atusb.brd: moved trace into antenna ground such that it coincides
with thermal relief
- atusb.pro: reduced edge and drawing line width from 15 mil to 5 mil
- atusb.brd: added ground zones on bottom layer
- atusb.brd: moved IRQ_RF and VDD traces for better ground area coverage
- atusb.brd: move antenna to its rightful place
- atusb.brd: added two more GND vias after antenna move
- atusb.brd: added proper board edge
- atusb.brd: added board dimensions (16.3 x 33.2 mm)
- atusb.brd: moved via next to C11 closer to C11 and away from RF section
- atusb/atusb.pro: instead of modules/meander, use experimental ants/meander
- atusb/atusb.pro: typo - it's modules/usb_a_plug_smt, not
modules/usb_a_plug
- atusb/atusb.cmp (ANT1): change antenna from "meander" to "MEANDER-110"
(10% enlarged)
- atusb/atusb.cmp (CON1): change from "miniUSB_B" USB receptacle to
"USB-A-PLUG-SMT" plug
- atusb/atusb.cmp (VR1, VR2, VR3): update value from schematics
Examples:
doall 'run/*' # no arguments
doall -o foo.png 'run/*' # arguments for plscan
doall -a 1 -- -o foo.png 'run/*' # arguments for evscan and plscan
- usrp/doall: added usage()
- usrp/doall: arguments before -- are passed to evscan
We now have a much wider dynamic range of the signal (with better SNR).
The outliers are mainly WLAN interferences.
- usrp/evscan: changed threshold from -50 dB to -70 dB
- usrp/evscan: increase outlier tolerance from 2 dB to 10 dB
- usrp/plscan: changed display range from [-35:-25] to [-40:-5]
- ants/cam/doit: coordinates for new workpiece
- ants/cam/pcb.pl: new margins (specific to workpiece)
- ants/cam/pcb.pl: changed width and slot (specific to board being cut)
The pre- and post-processing of FFT data was tweaked based on results
obtained from a mis-configured measurement setup, in an only partially
successful attempt to right the wrong data.
- usrp/fft.c (fft_complex): square the magnitude on output but don't
square the scaling
- usrp/fft.c (fft_real): square the magnitude on input (does this make
sense ?)
- usrp/fft.c (fft_real): scale the output with the square root of the
FFT size (dubious)
We know from CNTR that the capacitance of the 0603 TVS (EPCOS CT0603M4G,
200 pF) is too large and can disturb the USB signal. The 0402 TVS
(Panasonic EZJ-P0V080GA, 100 pF) works much better.
Since we have lots of 0402 components already, just change the remaining
0603 to 0402, too.
- usb.sch (VR1, VR2, VR3): change from 0603 to 0402 and from 5V5 to 5V6
- usb.sch (C1, C2, R1): change from 0603 to 0402
- atrf.sch (R3): set footprint to 0402
- atusb.pro: replaced modules/mini-usb with modules/usb_a_plug
- atusb.pro: removed extension from components/balun-smt6.lib
- atusb.cmp: update footprints for above changes
- atusb.cmp: change 0402 to 0402-M and 0603 to 0603-M, for easier
soldering
This way, we can plug the device into a USB port, like a USB stick.
We use a real plug (instead of shaping the PCB in the form of a plug)
for better mechanical stability.
- atusb.pro: change from components/mini_usb_b to components/usb_a_plug
- usb.sch (CON1): replace MINI_USB_B with USB_A_PLUG
The C2 pads were originally sized for permanently soldering a 100 mil
header. For development, a temporary connection is sufficient. Eventually,
we will just use pogo pins to make this connection.
- usb.sch: changed C2 pads from PAD_120x60 to PAD_60x60
- usb.sch: added comment that pads should be spaced at 100 mil interval
- atusb.sch: removed test points for signals going between USB and RF side
- atusb.sch: TST is no longer a rework item - removed comment saying it is
- atusb.sch, usb.sch, atrf.sch: bumped version number to 100930
- usrp/doall: new script to directly evaluate and plot data sets
- usrp/fft.c (fft_complex): don't square the magnitude
- usrp/plscan: if an argument name has the form title=name, use "name" as
the file name and "title" as the title
- usrp/evscan (usage, main): treat all arguments but the last as options
and pass them to "fft"
- usrp/fft.c (fft_complex, do_fft): moved actual FFT calculation to
separate function
- usrp/fft.c (fft_real, do_fft): added real-valued FFT (DCT) as alternative
- usrp/fft.c (main): undocumented option -a to set the FFT algorithm
- usrp/fscan: perform a frequency scan in my test setup
- usrp/evscan: determine the frequency-dependent signal strength from a
frequency scan
- usrp/plscan: plot one or more data sets produced by evscan
- usrp/fft.c: utility to read a set of samples obtained with
usrp2_rx_cfile.py and to perform a Fourier transform on them
- usrp/Makefile: use LDLIBS for libraries, not LDFLAGS
- usrp/Makefile: added "fft"
- usrp/p.c (find_peak, main): moved data processing to separate function
- usrp/p.c (find_peak, usage, main): new option -s skip to set the number
of samples to skip (default: 0)
- usrp/p.c (find_peak, usage, main): new option -d to dump the histogram
instead of picking the peak
- usrp/p.c (find_peak, usage, main): the percentile can now be set on the
command line (default: 0.9)
