Changes for page ANU Seismic Data Loggers

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• Page properties (1 modified, 0 added, 0 removed)

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105	105	This menu also displays the firmware version, battery, external, and solar voltages, and the temperature of the system.
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107		-* Check that all //Initialisation Parameters// are marked as successful.
108		-* Check that solar voltage is above 10 V in the software, or preferrably physically check that the battery's voltage is increasing via a DMM.
	107	+* Check all Initialisation Parameters are marked as successful.
	108	+* Check that solar voltage is above 10 V, otherwise the station will not last long.
109	109
110	110	== Live Seismometer Data ==
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120	120	This menu displays the status of the stations' GPS connection. The screen lists; UTC time, UTC date, latitude, longitude, altitude, number of satellite connections, and SNR.
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122		-* Check that the station is connected to satellites. 3 or more should be perfectly adequate to keep time.
	122	+* Check that the station is connected to satellites
123	123
124	124	== SD Information ==
125	125
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153	153	(% class="box errormessage" %)
154	154	(((
155		-Again, ensure the 'RECORD ON RESTART' option is marked with a cross (the default setting). This ensures that the logger will record any time it receives enough power!
	155	+NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
156	156	)))
157	157
158	158	(% class="wikigeneratedid" %)
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168	168
169	169	= Instrument Response =
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171		-Both the TerraSAWR and LPR-200 use the same ADS1281 analog-to-digital converter chip and are designed to have identical instrument response. The ADC (analog to digital) chip in both loggers originally samples at 1024000 Hz and downsamples towards the output data rate via a 5th order SINC filter, then another four FIR filters. If the output is below 250 Hz, a final "pure" /5 decimation is done without any sort of FIR filter. For the most part, the data logger response essentially flat when the samplerate output is set to 100 Hz or less and for seismological purposes is likely to be impossible to detect below 20 Hz regardless.
	171	+Both the TerraSAWR and LPR-200 use the same ADS1281 analog-to-digital converter chip and are designed to have identical instrument response. The ADC (analog to digital) chip in both loggers originally samples at 1024000 Hz and downsamples towards the output data rate via a 5th order SINC filter, then another four FIR filters. If the output is below 250 Hz, a final "pure" /5 decimation is done without any sort of FIR filter.
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173	173	{{info}}
174		-The 600+ Stage 3 SINC coefficients during the initial 1024k > 16k decimation were left off as they slowed down the process x10 and contribute at most 0.3 db amplitude and 0.31 ms phase delay discrepancies, and primarily only to frequencies near the nyquist. If for some reason you want to add this phase manually we can share the parameters with you.
	174	+The Stage 3 SINC coefficients (600+) during the initial 1024k > 16k decimation were left off as they slowed down the process x10 and contribute very little (< 0.3 db, < 0.31 ms) to the end result
175	175	{{/info}}
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177	177	The user can choose to apply a 2nd stage "sensor gain" by selecting an instrument type in the setup menu. This effectively selects a 10 Vpp (e.g. short period sensors), 20 Vpp, 40 Vpp (most broadband sensors) regime to match the sensor's sensitivity. This has the effect of doubling amplitude from 10v to 20v, or quadrupling from 10v to 40v. If you have set your sensor correctly (and the signal isn't clipped!) you can "correct" this by simply multiplying your data by 0.5 etc. This gain manifests itself in stage 2 in the response information.
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236		-
237	237	(% class="box" %)
238	238	(((
239	239	= TerraSAWR Specs =