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# Copyright (C) 2020—2026, Glasgow Interface Explorer contributors
# This file is distributed under the same license as the Glasgow Interface Explorer package.
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#: ../../src/applets/measure/prn_noise.rst:2
msgid "``generate-prn-noise``"
msgstr ""

#: ../../src/applets/measure/prn_noise.rst:5
msgid "CLI reference"
msgstr ""

#: ../../<autoprogram>:1
msgid "glasgow run generate-prn-noise"
msgstr ""

#: ../../<autoprogram>:1
msgid "Generates pseudo-random binary noise at 384 Mcps effective chip rate on a single GPIO pin.  Uses a 31-bit maximal-length LFSR (x^31 + x^28 + 1, Galois form) running at 192 MHz with DDR output (2 chips per clock via SB_IO posedge/negedge)."
msgstr ""

#: ../../<autoprogram>:1
msgid "The on-board 33 Ohm series resistor and parasitic capacitance form a low-pass channel; calibrate source flatness by measuring the output directly before inserting the DUT."
msgstr ""

#: ../../<autoprogram>:1
msgid "For audio-frequency work, the on-board series resistor can be combined with an external 240 nF film capacitor to ground to form a ~20 kHz single-pole low-pass filter.  The filtered output closely approximates Additive White Gaussian Noise (AWGN): each filter time constant integrates ~19,200 chips, giving near-Gaussian amplitude distribution via the central limit theorem."
msgstr ""

#: ../../<autoprogram>:1
msgid "LFSR period: 2^31 - 1 = 2,147,483,647 chips (~5.6 s at 384 Mcps)."
msgstr ""

#: ../../<autoprogram>:1
msgid "PLL: 48 MHz x16 / 4 = 192 MHz  (VCO = 768 MHz), DDR -> 384 Mcps."
msgstr ""

#: ../../<autoprogram>:1
msgid "Example:"
msgstr ""

#: ../../<autoprogram>:1
msgid "show this help message and exit"
msgstr ""

#: ../../<autoprogram>:1
msgid "configure I/O port voltage to SPEC (e.g.: '3.3', 'A=5.0,B=3.3', 'A=SA')"
msgstr ""

#: ../../<autoprogram>:1
msgid "bind the applet I/O line 'out' to PIN (default: 'A0', required)"
msgstr ""

#: ../../<autoprogram>:1
msgid "glasgow run generate-prn-noise start"
msgstr ""

#: ../../<autoprogram>:1
msgid "glasgow run generate-prn-noise stop"
msgstr ""

#: ../../src/applets/measure/prn_noise.rst:14
msgid "API reference"
msgstr ""

#: glasgow.applet.measure.prn_noise.PRNNoiseInterface:1 of
msgid "Host-side interface for the PRN noise source."
msgstr ""

#: glasgow.applet.measure.prn_noise.PRNNoiseInterface.start:1 of
msgid "Start the LFSR noise output."
msgstr ""

#: glasgow.applet.measure.prn_noise.PRNNoiseInterface.start:3 of
msgid "Zero seeds are clamped to 1 by the gateware."
msgstr ""

#: glasgow.applet.measure.prn_noise.PRNNoiseInterface.stop:1 of
msgid "Stop noise output (hold pin low)."
msgstr ""

