This setting screen controls the individual channel settings. To enter this screen, press Alt 1 to Alt 8 keys, or, F1 to F4 (channels 1 to 4) or Alt F1 to Alt F4 (channels 5 to 8) keys.
Menu Items:
Additional Information
Sets the vertical (amplitude) compression / expansion for the trace. 1 = no compression or expansion. A positive number will compress and a negative number expand the data.
Enter a number between -100 and 1000. Default: 1
Used for simple amplitude alarm triggering. Sets the threshold for the appropriate channel if the alarm feature is enabled. Enter a positive number above your normal background noise level. Setting this field to 0 will enable STA/LTA triggering.
Enter a number between 1 and 32767 or 0 for STA/LTA triggering. Default: 100
Sets the STA/LTA threshold point. See Using STA/LTA for more information.
Enter a floating point number. Default: 4.0
Sets STA/LTA average times. See Using STA/LTA for more information.
Enter two floating point numbers. The first number is the STA average time and the second is the LTA average time. Both numbers are in seconds. Default: 1 20
LTA Minimum:
Sets
LTA minimum value. See Using STA/LTA
for more information.
Enter a floating point number. Default: 0
Sets the time in seconds the channel stays in the pre-trigger condition. See Using STA/LTA for more information.
Enter a floating point number in seconds. Default: 10
This field is used for both simple amplitude and STA/LTA triggering modes. Sets the number of data points that must be exceeded above the Threshold Point or STA/LTA Threshold to trigger an alarm and auto save the event file(s). A number between 20 and 50 should be fine for amplitude triggering and 2 to 4 for STA/LTA triggering. See Using STA/LTA for more information.
Enter a number between 1 and 100. Default: 40
Enables or disables Alarm processing for this channel.
Enter a Y for Yes or N for No. Default: Yes
Enables or disables the displaying of this channel. Note: Data is still recorded if the channel is not displayed. Event files will be produced when the system triggers and the Replay mode can be used to extract event files.
Enter a Y for Yes or N for No. Default: Yes
Used to setup a period of time when the alarm processing for this channel is inactive. Enter the hour to start lockout or a -1 for no lockout. See below for more information.
Enter a number between 0 and 23 or -1 to disable. Default: -1
Used to setup a period of time when the alarm processing for this channel is inactive. Enter the minute to start lockout or a -1 for no lockout. See below for more information. This setting is only active if the Alarm Lockout Hour is enabled.
Enter a number between 0 and 60. Default: None
Used to setup a period of time when the alarm processing for this channel is inactive. Enter the time length, in minutes, to disable alarm processing. See below for more information. This setting is only active if the Alarm Lockout Hour is enabled.
Enter a number between 1 and 60. Default: None
Enable or disable Auto Save for this channel. When an alarm is triggered all enabled channels will save an event file.
Enter a Y for Yes or N for No. Default: Yes
Used to filter automatically saved event files. If a value other than 0 is entered, the peek data count during an alarm for this channel must be higher then the number entered in this field before an event file will be saved. A value of 0 disables event file filtering. This setting should only be used if more than one channel is being recorded.
Enter a number between 0 and 32767. Default: 0
File extension for event files from this channel.
Enter 1 to 3 character string. Default: Channel Number
Elevation of the sensor in meters above or below (negative number) sea level. Use -12345.0 if unknown.
Enter a floating point number. Default: -12345.0 (unknown)
Enter the Latitude of the sensor in degrees and decimal point - not in degrees, minutes, seconds. Use a negative number for the Southern Hemisphere.
Enter
Enter the Longitude of the sensor in degrees and decimal point - not in degrees, minutes, seconds. Use a negative number for the Western Hemisphere.
Enter sensor longitude. Default: None
Single character denoting sensor orientation. Normally set to Z (vertical), N (North-South sensor) or E (East-West sensor).
Enter orientation character. Default: None
Sensor azimuth angle in degrees with respect to the north through east. For a N-S or vertical sensor use 0. For a E-W sensor use 90. Set to -12345.0 if unknown.
Enter floating point sensor azimuth number in degrees. Default: -12345.0
Sensor incident angle in degrees with respect to vertical. For a N-S or E-W sensor use 90. For a vertical sensor use 0. Set to -12345.0 if unknown.
Enter floating point sensor azimuth number in degrees. Default: -12345.0
Inverts the data for this channel.
Enter a Y for Yes or N for No. Default: No
Ml and Ms Magnitude Correction:
A floating point number used by WinQuake to calculate magnitude. See the WinQuake documentation for more information.
Enter floating point magnitude correction number. Default: 0
The actual sensitivity of the sensor if known. See Sensor Sensitivity note below.
Enter floating point sensor sensitivity. Default: 0
Sensor type character. A = Acceleration (accelerometer) sensor, V = Velocity sensor or D = Displacement sensor. Enter ? for unknown.
Enter sensor type character. Default: ?
Component Name:Used to correct for any DC offset on this channel.
Enter a number between -1000 and 1000. Default: 0
Sensor Component Name. Used to describe the sensor.
Enter a 3 character string. Default: BH and the Orientation character.
Network affiliation.
Enter a 2 to 6 character network affiliation name. Default: PSN
Used with my 16 bit A/D card. If this setting is set to Yes, this channel will only record 12 bits of data instead of the full 16 bits. This setting can be used if you have a very noisy sensor or recording a USGS telemetry station.
Enter a Y for Yes or N for No. Default: No
The bottom of the screen provides a legend that lists the various colors available and the number to input for both the normal trace color and the color to change to when the channel goes into an alarm or triggered state. This allows you to have a blue trace for channel 1 and a green trace for channel 2 etc.
Enter Color number. Default: 15 (Bright White)
and
Enter Alarm Color number. Default 12 (Light Red)
Used to compensate (in milliseconds) for any propagation delay through the low-pass filter for this channel. See note note below for more information.
Enter a number between 0 and 30000 (30 seconds). Default: 0
When SDR automatically saves an event file it will use this number for the Save Nth value. Save Nth controls the sample rate of the event file. See the Replay mode for more information on the Save Nth number.
Enter a number between 1 and 500. Default: 1
Used to load a new channel setting INI file. Use the Save Settings File to create an INI file.
Enter new settings file name. Default: Current channel INI file.
Used to save the current channel settings to a file. After pressing Y, you will be prompted for the file name to use to save the current channel settings information.
Enter a Y for Yes or N for No. Default: No
Sensor location string. Example: Redwood City, CA USA
Enter a short string describing the sensor location. Default: None
Sensor information string. Please keep as short as possible. Example: 12 second Lehman or Geospace HS10 1Hz Geophone
Enter a short string describing the sensor. Default: None
The time lockout feature of SDR is normally used for radio telemetry systems. Many telemetry systems send a calibration pulse that gets sent every day at the same time. The Alarm Lockout settings allow you to disable the alarm feature so the program will ignore the calibration signal.
The Filter Delay setting is used to compensate for the propagation delay of the signal through the low-pass filter connected between the sensor and the A/D card. This is done by subtracting from the start time of the event file the number of milliseconds entered in this field. To measure the delay of your filter you will need a signal generator with a square wave output and a oscilloscope with two channels (or you could use two SDR channels). Feed the square wave into the amp / filter card. With the O-Scope look at the input signal with one channel and the output of the filter with the other. Measure the difference between the input and output signal in milliseconds and enter that number in the Filter Delay field for the channel. If you are using my Amp / Filter board with a 10 Hz low-pass filter you should use a value of around 50. If you have my USGS telemetry demodulator board use a value of 70.
The Sensor Sensitivity field number depends on the Sensor Type field. If the sensor output is acceleration (A), sensitivity is in cm/sec/sec per A/D bit, if the output is velocity (V) cm/sec per bit and if the output is displacement (D) in cm per bit. This web page can be used to calculate the sensitivity number if you know the output voltage of your sensor.