917 commits

Author	SHA1	Message	Date
Roger Henderson	1ea012aa57	implement FPGA-based CDS to avoid BRAM overflow ... Move CDS phase computation from per-point config storage to FPGA logic. The FPGA now computes the 180° phase shift internally (M/2) and loops twice per point when CDS is enabled. This keeps config memory at 96 bits instead of 112, avoiding BRAM overflow on the Spartan 6. FPGA changes: - Add CDS_ENABLED input to Sweep module (controlled via SPI register 6) - Compute source_phase = M/2 for 180° shift when cds_phase=1 - State machine loops through all stages twice per point when CDS enabled - RESULT_INDEX now includes cds_phase bit: stage[2:0] & point[11:0] & cds_phase Firmware changes: - Add FPGA::SetCDSEnabled() to control CDS via register 6 bit 11 - Update SamplingResult to include cdsPhase field (1 bit) - Simplify VNA.cpp: FPGA handles phase switching, MCU combines results Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-01 21:19:57 +13:00
Roger Henderson	0b571688a9	add Correlated Double Sampling (CDS) support ... Implements CDS to reduce noise by taking multiple measurements at different source PLL phase offsets and combining with cosine weighting. Firmware changes (VNA.cpp, Protocol.hpp): - Add cdsPhases field to SweepSettings (0=disabled, 2-7=phase count) - Configure N internal sweep points per user point with phase offsets - Accumulate weighted samples: result = Σ(sample[k] × cos(2π×k/N)) - Per-stage accumulators for multi-stage measurements PC application changes: - Add "CDS" checkbox to VNA acquisition toolbar - When enabled, sets cdsPhases=2 for 180° differential measurement - Tooltip explains the feature With 180° CDS (2 samples): - Sample at 0°: weight = cos(0°) = 1 - Sample at 180°: weight = cos(180°) = -1 - Combined result = Sample₀ - Sample₁₈₀ Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-31 23:47:02 +13:00
Roger Henderson	6c06293179	add per-point source PLL phase adjustment support ... Adds ability to set phase adjustment on Source PLL for each sweep point. When sourcePhase != 0, the FPGA executes a CDM toggle sequence after normal PLL register load to apply the specified phase offset. Changes: - MAX2871.vhd: add PHASE_ADJUST input and CDM toggle state machine - Sweep.vhd: extract phase from config, generate phase adjust signal - SPIConfig.vhd: handle 112-bit config data (was 96-bit) - top.vhd: wire phase adjustment signals, widen data buses - SweepConfigMem.xco: update BRAM width to 112 bits - FPGA.cpp/hpp: add sourcePhase parameter to WriteSweepConfig Phase formula: phase_degrees = (sourcePhase / M) * 360 For 180° shift: sourcePhase = M/2 Note: SweepConfigMem IP core must be regenerated before FPGA build. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-31 16:57:10 +13:00
Jan Käberich	bf028e2d21	add SCPI API for dwell time	2026-01-27 18:24:05 +01:00
Jan Käberich	5cb28b0122	revert unnecessary debug output	2026-01-27 18:23:51 +01:00
Jan Käberich	4a8b713b91	zero out Protocol::PacketInfo on creation	2026-01-20 13:44:37 +01:00
Jan Käberich	5ce342d2db	prevent crash in packet log view with invalid values	2026-01-20 13:11:08 +01:00
Jan Käberich	6b4bf83320	make DEV:INF:TEMP? command hardware version specific	2025-12-16 15:18:58 +01:00
Jan Käberich	068770a76e	support reference settings for hardware version 0xD0	2025-12-11 19:19:26 +01:00
Jan Käberich	fda9ff96c2	bugfix: capture by reference	2025-12-09 13:43:21 +01:00
Jan Käberich	42aca8ff8d	only set idle when mode is active	2025-12-09 12:26:45 +01:00
Jan Käberich	c95694582d	prevent copying/moving of SCPINode objects	2025-12-09 11:50:56 +01:00
Jan Käberich	6a7b985fa9	Refactor Calkit::fromFile without the need for move semantics	2025-12-02 16:52:34 +01:00
Jan Käberich	7bdbcde9be	SCPI API for editing calibration kit standards	2025-12-02 15:29:47 +01:00
Jan Käberich	fbef4b364f	fix ambiguous conversion error	2025-12-02 13:50:21 +01:00
Jan Käberich	da1228c9b1	Document and fix deembedding SCPI API	2025-12-02 13:43:21 +01:00
Jan Käberich	3aac724298	prevent the combination of log sweep and start frequency = 0	2025-12-02 11:36:36 +01:00
Jan Käberich	0f9510e7a0	save number of averages in setup files	2025-12-02 11:30:16 +01:00
Jan Käberich	65bc247a65	SCPI API for querying the sweep cursor	2025-12-02 11:22:54 +01:00
Jan Käberich	d0c8a1ae8e	SCPI API for setting/reading calkit meta data	2025-12-02 11:05:51 +01:00
Jan Käberich	9923038d6c	allow spaces in arguments of SCPI commands	2025-12-02 10:33:04 +01:00
Jan Käberich	72d547eb08	SCPI: support lower case for calkit file names	2025-12-02 10:08:06 +01:00
Jan Käberich	d853571aea	move to dedicated driver	2025-11-17 16:38:02 +01:00
Jan Käberich	64791e6d4e	option to restore default values of device configuration	2025-11-15 19:22:15 +01:00
Jan Käberich	b6718c57b2	Improve marker handling when at the edge of a graph	2025-11-15 19:03:41 +01:00
alexey.lysiuk	56dbec82d4	Add image saving to SVG format ... This allows to create images independent from screen resolution Replaced copy-pasted screenshot code with the single implementation	2025-11-12 15:14:37 +02:00
Jan Käberich	bbd1bce0b8	accept enter key along with return key when setting values	2025-11-05 10:41:56 +01:00
Jan Käberich	937b002dfb	Minor UI improvememts ... - Add space between number and unit - Increase width of toolbar items to (hopefully) be fully visible for all operating systems and themes - Adjust order of automatically created calibration measurements to match LibreCAL - Disable edit triggers for calibration measurement table - Show timestamps of calibration measurements in local time - Allow starting calibration measurements by double clicking row	2025-11-05 09:19:02 +01:00
Jan Käberich	d77215aecb	initialize new plots with the correct span	2025-10-31 15:42:42 +01:00
Jan Käberich	92088ec646	Enable auto mode comobobox when auto range is active for X axis	2025-10-31 14:26:19 +01:00
Jan Käberich	be123420db	Configuration for hardware version 0xD0	2025-10-28 12:08:13 +01:00
Jan Käberich	273dfa8037	add support for hardware version 0xD0 device status	2025-10-24 12:55:09 +02:00
Jan Käberich	6e2079fcfb	menu entry to run internal alignment if supported by hardware version	2025-10-23 12:57:49 +02:00
Jan Käberich	ed699cfd6a	hide device specific actions based on the hardware version	2025-10-23 10:16:33 +02:00
Jan Käberich	f51c6a0bce	Manual control dialog for prototype 0xD0	2025-10-15 10:23:08 +02:00
Jan Käberich	5d00d4786b	new calibration type without receiver matching for lossy calibration standards	2025-09-22 16:58:49 +02:00
Jan Käberich	3e327e7e6b	option to use already existing measurements for calibration	2025-09-22 16:01:38 +02:00
Jan Käberich	b2fd49d800	increase resolution for referenced data in 0xE0 manual control dialog	2025-09-17 10:47:27 +02:00
Jan Käberich	f327a4b4a0	allow firmware updates for version 0xE0	2025-09-17 10:46:44 +02:00
Jan Käberich	5947584e63	manual control dialog for experimental hardware version 0xE0	2025-08-31 18:49:38 +02:00
Jan Käberich	3071d8de72	Set new markers to middle of trace by default	2025-08-28 07:59:58 +02:00
Jan Käberich	d882bca547	rework editor creation for MarkerTraceDelegate	2025-08-22 11:47:48 +02:00
Jan Käberich	f0c7f289cb	Bugfix: remove not used optional parameter	2025-08-17 20:18:38 +02:00
Jan Käberich	8b44421ea3	improve PLL fractional divider algorithm	2025-08-17 19:37:10 +02:00
Jan Käberich	66d5bdd91b	Add calibrated parameters table	2025-08-15 21:07:34 +02:00
Jan Käberich	10ba138104	Allow manual calibration of incomplete trace sets	2025-08-10 17:48:18 +02:00
Jan Käberich	2f018e3867	New calibration type: OSL	2025-08-10 17:17:53 +02:00
Jan Käberich	68e8d29e0c	Calibration error term model view	2025-08-10 15:13:24 +02:00
Jan Käberich	1b3c1c4b3b	Merge branch 'master' of github.com:jankae/LibreVNA	2025-08-09 19:12:07 +02:00
Jan Käberich	38b4a6ba39	Bugfix: correct PLL configuration at the band switch frequency (25 MHz)	2025-08-09 19:11:32 +02:00