LOTEK WIRELESS — USER’S MANUAL Guide to the SRX 800 Telemetry Receiver Lotek Wireless Inc. 115 Pony Drive Newmarket Ontario Canada L3Y 7B5 www.lotek.
WELCOME TO THE SRX800 The SRX800 receiver is used to scan frequencies and antennas (radio antennas and/or hydrophones) and to record data collected from Lotek transmitters. Some of the features that are offered in the SRX800 are: • One serial port for connecting to a computer (use null-modem cable to connect to PC, standard RS-232 cable to connect to a modem). • One USB port for connecting to a computer • 1 kHz channel spacing • Non-volatile flash memory • 9 V power supply via 6 x C cell Alkaline 1.
ABOUT THIS MANUAL For a flow-chart style layout to all the features accessible through the receiver’s keypad, please consult the Guide to the SRX Keypad and LCD Display manual. This manual does not cover communicating with the receiver using the SRX Host application. Please refer to the Guide to the SRX800 Host Application manual for details. TECHNICAL SPECIFICATIONS Operating Voltage Range 8-10 V DC (nominal 9 V) Operating Current 250-450 mA @ 9 V Battery Life (6 x C cell 1.
Pollution Degree 2 Altitude Rating 2000 m RF Parameters Operating Frequency Range 138-176 MHz VHF Input Impedance 50 Ohm Channel Spacing 1 kHz Frequency Stability 5 ppm Sensitivity Minimum discernible audio level -150 dBm Minimum discernible by software -135 dBm
RECEIVER CARE, MAINTENANCE AND SERVICE Protect the SRX800 from excessive dust and moisture. If basic cleaning is required, wipe the housing and front panel gently with a soft cloth. To clean it more thoroughly, wipe the housing with a soft cloth dampened with a mild solution of soap and water. Do not allow any liquid to get inside the housing. Store the unit in a cool dry place when not in use. Always use the head-phones provided by Lotek (stereo plug, 30 Ohm speakers).
picture on page 9) which has the following meaning: Caution, refer to manual.
FRONT PANEL COMPONENTS • Power On/Off and Volume Control knob (labeled OFF/VOL) • 16-key pad • 2-line by 24-character LCD screen • Standard 1/8 inch (3.5 mm) headphone jack • BNC jack for antenna (labeled ANT )- 50 Ohm • Speaker for broadcast of detections located on the upper panel. See below the front panel, with description: LCD Display BNC RF VHF Antenna Input 3.
The built in speaker is located on the top of the receiver. See the picture below. Speaker BACK PANEL COMPONENTS • Jack for connecting a power cable (labeled 9 V DC, 1A) • Power On LED on the rear panel signaling correct input voltage (green means OK, red means improper AC-DC adapter). Replace the AC-DC adapter in case the LED gets red. If the Led is red, the receiver will not be operational, as the power management system will disconnect the electronics from the power supply.
• USB Port: for communication with a PC • GPS antenna connector for active GPS antenna See below the back panel, with the descriptions: Power ON LED Battery Compartment Lid ASP_8 Port Regulatory Labeling with e CE Mark Guide to the SRX800 Receiver Preliminary 9 V, 1A DC Input USB GPS Connector for active GPS antenna RS-232 Battery Compartment Lid Label with S/N, model # and warning sign
PO W ER I N G T H E SR X8 0 0 R EC EI VE R POWERING THE RECEIVER USING THE EXTERNAL 9 V DC INPUT: The receiver will operate with 6 x C cell 1.5 V Alkaline batteries, or via an external 9 V power supply which can be connected via a jack located on the rear panel. A wall-mount certified (UL, CSA and CE) power supply provided by Lotek must be used. The external power supply accepts 110 V, 60 Hz and 220 V 50 Hz.
Insert new batteries (three on each side), with the correct polarity, i.e. the positive terminal of the battery should be always up. This is also marked on the inside of the lid. Re-attach threaded lids Turn-on receiver, and check for normal operation See the picture below describing the correct polarity of the batteries: + MARKING ON THE INSIDE OF THE LID C CELL 1.
TURNING ON THE RECEIVER Turn the OFF/VOL knob clockwise until a click is felt.
TYPES OF TRANSMITTERS A Lotek transmitter uses a series of single-frequency pulses to communicate with the SRX800 receiver. Lotek radio transmitters operate at a frequency range of between 140 and 174 MHz.
THE KEYPAD AND LCD DISPLAY KEYPAD AND DISPLAY STRUCTURE The keypad and LCD screen define the interface through which the receiver is programmed. The program is designed like a hierarchy. All aspects of the program are accessed through keys on the keypad. The keypad is used to enter or select operating parameters, to input data, and to navigate through menus and pages. Every key, except Light, has two functions. Which function is accessible depends on the state of the receiver.
If the receiver is Offline, the LCD shows the current settings after the title of a page, but there is no provision for a new value to be entered.
LOGGING ON TO THE RECEIVER Logging on to the receiver provides the ability to change the state of the receiver. When a log on password is provided the receiver is considered Online. If no password is provided (logged off) then the receiver is Offline. The differences between Online and Offline are described below: • Offline: the receiver allows read-only access, which means that most inputs are not allowed (unless a log on password is provided). The only allowed input is the Reset Password function.
Log On > 2)Log Off or Log On > 3)Temporarily Log Off The receiver accepts the changes after a few seconds and LCD returns to the start page (the first screen shown after the receiver is turned on). Temporarily logging off creates a restriction, whereby logging on is accessible only from the receiver keypad and no longer accessible from the SRX Host software, except via the Host’s Keypad Simulator.
CHANGING A LOG ON PASSWORD Changing the log on password can be done only in Setup Mode and when the receiver is Online. Changing the password requires that the old password be entered, followed by the new one. The receiver automatically places a slash [/] between the two passwords as they are entered. The password must consist of six numbers.
USING THE INPUT KEYS ENTER Once a value is entered for an input, pressing the Enter key causes the receiver to accept that input and save it, provided that the receiver is Online. END/ESC The END/ESC key is used for menu navigation, for cancelling incomplete inputs, and for stopping receiver actions in Online mode. For navigation, it provides the ability to return to the last menu accessed.
All available menu items have a number in front of them (e.g. 1) Gain). To select a menu item, press the corresponding number on the keypad (e.g. press 1 to go to the Gain menu). When prompted for a numeric input, use the keypad numbers to enter a value. DECIMAL The lower portion of this key provides the decimal point needed for many input values. PLUS / MINUS SIGN Plus (+) or minus (-) signs are provided at the beginning of some input prompts (e.g. >+).
USING THE NAVIGATION KEYS RIGHT ARROW AND LEFT ARROW The Right and Left Arrow keys are used for navigating forwards and backwards between menu pages. If more than one page is available, a “-->” or a “<--” symbol appears in the lower-right corner of the LCD. Multiple pages are used to accommodate the limitations of a two-line display; any menu items or inputs that exceed this space must be spread out.
USING THE INFO KEY The Info key provides access to: • Battery voltage (main and backup) [1)Bat] • Available memory (in Kilobytes) [2)Mem] • Configuration settings (Scan Time and Code Set) [5)Cfg] • Service information (receiver’s Serial Number and number of hours in operation since last servicing) [6)Service] • The factory password (123456) [7)Factory Password] • Ability to answer an incoming call via the Modem [8)Answer Incoming Call] When accessing the Info key menu items, it is not possible log on to th
ADJUSTING FREQUENCY AND GAIN A new frequency can be selected using the Up or Down Arrows. The amount of increment or decrement is specified by Set Delta for frequency (see section called Set Delta for details). A new gain can be selected using the Up or Down Arrows. The amount of increment or decrement is specified by Set Delta for gain (see section called Set Delta for details).
SET DELTA Set Delta is used to set the increments for frequency and gain, so that when the Up and Down Arrows for frequency and gain adjustment are used, the receiver knows the amount it should advance up or down. SET DELTA FOR FREQUENCY When adjusting the frequency manually, the receiver increases or decreases the frequency (kHz) in use by an amount equal to the Frequency Delta increment.
STARTING A GPS ACQUISITION Start acquiring a GPS 2D position by pressing the GPS key on the keypad (key number 4). While attempting to acquire a position, the display shows the number of satellites as they are found. If a valid position is acquired, the following information is provided on the display: Latitude, Longitude, current date, current GMT time, the number of satellites used, HDOP, and PDOP.
• Configure communication settings (serial and modem) • Reset communication settings to the default Factory Settings • Enter the Local Date, Time, and GMT correction • Reset or change the log on password After the Setup key is pressed, the LCD shows three main menu items: 1)Comm, 2)Time, 3)Reset Password This section is organized by these three menu items. 1)COMM CONFIGURING SERIAL PORT SETTINGS The serial port must have its baud rate (for modem), parity, data bits, and stop bits defined.
• Stop Bits: Select either 1 or 2 stop bits. Setup > 1)Comm > 1)Configure > 1)Serial I (or) 2)Serial II > 4)Stop Bits The receiver also needs to know if the serial port is going to be used for connecting to a modem (see Configuring Modem Settings for details). CONFIGURING MODEM SETTINGS The modem must be connected to Serial I. Serial I must have the appropriate baud rate set to be compatible with the speed of the modem.
View the CMDS via: Setup > 1)Comm > 1)Configure > 1)Serial I > 5)Modem > ViewCMDS CMDS stands for Command String and it is used to initialize the modem. The CMDS may need to be viewed if the modem is not working or if data transfer is very slow. If the CMDS parameters are not appropriate for the modem being used, they can be changed using the SRX Host software. To find out what CMDS parameters the modem needs, consult the modem’s user guide or Lotek Wireless Inc. for details.
Setup > 1)Comm > 2)Factory Settings > 1)Serial I Guide to the SRX800 Receiver Preliminary (or) 2)Serial II
2)TIME ENTERING THE GMT CORRECTION For the GPS feature of the receiver to update its clock properly, it must know the GMT correction for the receiver’s location. Enter the GMT correction via: Setup > 2)Time > 1)GMT Correction The time format is in hh/mm. ENTERING LOCAL DATE AND TIME The receiver uses the local time and date in combination with the GMT correction so that data can be displayed in local time, even though the receiver works internally in GMT time.
3)RESET/CHANGE PASSWORD CHANGING A LOG ON PASSWORD Access to this feature is provided only in Setup Mode. A password can be changed only when the receiver is Online. Changing the password requires that the old password be entered first, followed by the new password. The receiver automatically places a slash [/] between the two passwords as they are entered. The password must be made up of six numbers.
MANUAL MODE CHAPTER OVERVIEW Manual mode provides the ability to collect data without using a Configuration (see the Codelog Mode chapter for details on Configurations). In manual mode operation, data is not recorded by the receiver. Detections are indicated by pings or clicks emitted by the speaker on the receiver’s front panel. Adjust the volume by turning the OFF/VOL knob clockwise.
• Changing the Set Delta frequency and/or gain • Acquiring a GPS 2D position • Entering a gain • Setting the noise threshold Settings that are unique to the Search menu item are: • Pausing or resuming a scan • Entering a minimum frequency • Entering a maximum frequency • Defining a frequency step • Setting the scan time Settings that are unique to the Signal menu item are: • Changing the antenna port assignment for the master radio antenna and/or the hydrophone • Changing the radio frequency • Changing the
1)CODE SET (AND DETAILS ON CODES) A transmitter code is made up of four pulses that occur over three-pulse intervals. A pulse interval is the period of time that elapses between one pulse to the next. The three-pulse intervals are unique to every transmitter, so that the receiver can identify the transmitter. To interpret the pulse intervals, the receiver references a library, called the Code Set.
1: Lotek Code Sets and Firmware includes, but is not limited by the following: Lotek-1 (also referred to as Lotek 1993 code set or 1993 code set), Lotek-2 (also referred to as Lotek 1994 code set or 1994 code set), Lotek-3 (also referred to as Lotek 2000 code set or 2K code set), Lotek-4 (also referred to as Lotek 2003 code set or 2003 code set) and Lotek-5. SELECTING A CODE SET Code sets are accessed via: Manual > 1)Code Set. Use the keypad to select the desired code set.
2)SEARCH STARTING A SCAN VIA SEARCH A scan cycle can be started via: Manual > 2)Search > 1)Start. To stop a scan, press the END/ESC key. When a scan is started from the Search menu, the receiver scans through a range of frequencies looking for a signal using the Frequency Step setting. The frequency step is the increment in kHz that the receiver uses to increase the frequency as a scan proceeds. The frequency range is defined by entering a maximum frequency and a minimum frequency.
Use the keypad to select the desired code set. If the receiver is Offline, then accessing the code set feature only provides the current setting information. P AUSING A SCAN Pause a scan via Manual > 2)Search > 1)Start > 0)Pause Scan This function suspends the scan cycle on the frequency and antenna being scanned. The receiver does not change the frequency or antenna it was scanning when paused, but it does continue to log data for that frequency and antenna.
SET DELTA FOR G AIN When incrementing gain manually (by using the keys on the keypad), the receiver adds the Set Delta gain increment to the gain being used at the time the gain is adjusted up or down. Set this increment via: Manual > 2)Search > 1)Start > 3)Set Delta > 2)Gain STARTING A GPS ACQUISITION To start acquiring a GPS 2D position, press the GPS key on the keypad (key number 4). While attempting to acquire a position, the display shows the number of satellites as they are found.
A new gain can be selected with the Up or Down arrows. The amount of increment or decrement is specified by Set Delta for gain (see the section Set Delta in Chapter 1 for details). ENABLING/DISABLING NOISE BLANKING (N BLANK) Noise blanking enhances the receiver’s audio performance, especially in aircraft or other noisy environments, by suppressing the receiver’s audio response except when a signal is detected. This helps prevent auditory fatigue when using the receiver for extended periods of time.
Once the maximum frequency is met, the receiver starts scanning from the minimum frequency again. DEFINING A FREQUENCY STEP The frequency step is the increment in kHz that the receiver uses to increase the frequency as a scan proceeds. Enter the value for the increment via: Manual > 2)Search > 1)Start > 5)Freq Step Starting a scan via Search means that the Set Delta frequency is not used. For Search the frequency step option is provided to set a frequency increment.
3)SIGNAL STARTING A SCAN VIA SIGNAL Scanning using Signal means that the receiver monitors only one frequency and one antenna until they are changed manually. The scan cannot be paused using Signal. Start a scan via: Manual > 3)Signal > 1)Start SELECTING A CODE SET Codes sets are accessed via: Manual > 3)Signal > 1)Start > 1)Code Set Use the keypad to select the desired code set. If the receiver is offline, then accessing the code set feature only provides current setting information.
SET DELTA FOR FREQUENCY When adjusting the frequency manually, the receiver increases or decreases the frequency (kHz) in use by an amount equal to the Frequency Delta increment. Set this increment via: Manual > 3)Signal > 1)Start > 3)Set Delta > 1)Freq SET DELTA FOR G AIN When incrementing gain manually, the receiver increases the gain in use by an amount equal to the Set Delta gain increment.
ADJUSTING FREQUENCY AND GAIN A new frequency can be selected using the Up or Down Arrows. The amount of increment or decrement is specified by Set Delta for frequency (see section called Set Delta in chapter 1 for details). A new gain can be selected using the Up or Down Arrows. The amount of increment or decrement is specified by Set Delta for gain (see section called Set Delta in chapter 1 for details).
CHANGING THE ANTENNA PORT To switch to another antenna/hydrophone quickly, enter in the antenna port number of the desired antenna via: Manual > 3)Signal > 3)Ant If the antenna is connected to the front of the receiver and not the ASP-8, then enter 0 for the port value. The port on the front of the receiver is always called AH0.
Set the noise threshold via: Manual > 3)Signal > 5)Noise Threshold The maximum noise threshold value that can be entered is 99. CODELOG MODE CHAPTER OVERVIEW Codelog mode is initiated by pressing the Codelog key on the keypad. Many features are accessible in Codelog mode. After pressing the Codelog key, three menu items are shown: 1)Config, 2)Scan, and 3)Master Ftable. In each of these menu items are different settings and features. This section of the manual addresses each menu item separately.
• Define the Scan Time and Total Scan Time • Enable/Disable TOA • Enable/Disable CRTO • Enable/Disable AGC • Enable/Disable GPS Clock • Enable/Disable GPS Positioning • Provide a Site Number 3)Freq/CH • Add a Radio Frequency and Channel • Add an Acoustic Frequency and Channel • Modify settings for a single Frequencies • Modify settings for all Frequencies 4)Ant/Hydr • Select the ASP-8 antenna switchbox • Add antennas to the Radio Antenna Group • Add hydrophones to the Hydrophone Group • Designate a Radio An
• Accept or Reject a Channel and ID combination • Accept or Reject a transmitter ID • Set an Echo Filter for detections • Set a Noise Threshold for detections • Enable/Disable the minimum Pulse Width (2ms) for detections • Enable/Disable the maximum Signal Strength Deviation (max=18) for detections 6)Sensors • Define the Sensor Class • Select the Sensor Type • Define parameters for each sensor type (minimum, maximum, and level) Guide to the SRX800 Receiver Preliminary
1)CONFIG > 1)NEWCFG 1)NEWCFG Configurations are initially created by the SRX800 Host software and are used to create a system for storing receiver settings that can be reused as often as needed, whether throughout a study or across different studies. Data collected using a configuration is saved to the receiver’s flash memory. Up to eight configurations can be created using the SRX Host and then sent to the receiver. All configurations are sent in a single file, even if all eight are not used.
1)CONFIG## > 2)SCAN SETTINGS UNDERSTANDING SCAN CYCLES A Scan Cycle is the time it takes for the receiver to scan all frequencies on all antennas/hydrophones in the specified scan order. The amount of time a scan cycle lasts depends on the number of frequencies and antennas/hydrophones, the scan time, and the Total Scan Time. It also depends on two additional features: Time-Out on Acquisition (TOA) and Master Antenna Preview.
code. Every transmitter is assigned a unique code so that it, and any sensor data associated with it, can be identified by the receiver. For the receiver to interpret the pulse interval sequence, it must reference a library, which is called the code set. The code set used with the receiver specifies all the different combinations of pulse intervals that can exist, and gives the receiver information on how to interpret transmitters that transmit sensor data using that code set.
Codes Sets are accessed via: CodeLog > 1)Config## > 2) Scan Settings > 1)Code Set Use the keypad to select the desired code set. If the receiver is Offline, then accessing the codeset feature only provides current setting information. Code sets can also be selected via: Manual > 1)Code Set. SETTING A SCAN TIME When collecting data, the receiver needs to know how long it should scan each frequency and antenna combination. This is referred to as the scan time.
If a total scan time is not set (left as 00:00), then the receiver immediately starts another scan cycle. If the total scan time set is less than the calculated total scan time (see below) then the value entered is ignored and the receiver treats it as if no total scan time was set. CALCULATING TOTAL SCAN TIME Use the equation below to calculate the Total Scan Time value.
to the next frequency and antenna (depending on the scan priority that was selected). TOA can be enabled in conjunction with other settings like Frequency Priority, Antenna Priority, and Master Antenna Preview. If TOA is disabled, the SRX800 scans each frequency and antenna combination for exactly the specified scan time before switching to the next frequency and antenna combination. ENABLING/DISABLING CRTO CRTO (Continuous Record Time-Out) is used to save memory space.
• It is not possible to determine if the valid detections were evenly distributed or grouped together during the CRTO window If CRTO is enabled, then Automatic Gain Control (AGC) is immediately disabled, because gain must be fixed for the duration of a data record. If CRTO is enabled, then the GPS 2D-positioning feature of the receiver is disabled, but it still allows the GPS clock to function. SETTING THE CRTO TIMEOUT The CRTO Timeout specifies the amount of time the CRTO Window is open for.
CRTO cannot be used if AGC is enabled, because gain must be fixed for the duration of a data record. ENABLING/DISABLING THE GPS CLOCK When the receiver begins scanning, it can simultaneously update the GPS clock as long as the GPS clock is enabled. This provides a higher time resolution for data recorded by the receiver. When the GPS clock is enabled, it comes on for five minutes, updating the clock every second, and then it turns off for three hours.
The first line in the display shows the current setting and updates accordingly when 2)En/Dis Position is selected. ENTERING A SITE NUMBER The Site Number is a four-character numeric code that provides a way of identifying a study site. For example, if the receiver is moved several times throughout a study, the changes may be recorded using the site number. Downloaded data that is collected always includes the site number as part of the environment data record.
1)CONFIG## > 3)FREQ/CH The SRX800 scans frequencies according to how they are configured in the receiver. Several parameters related to frequency need to be set before data collection can begin. CREATING A CONFIGURATION SPECIFIC FREQUENCY TABLE A Configuration Specific Frequency Table is a group of frequencies that are assigned to a specific configuration. When a scan cycle is started, the receiver scans the frequencies in the table in the order they were entered.
MASTER FREQUENCY TABLE All frequencies entered into the receiver are also copied into a master frequency table. Up to 128 distinct frequencies can be copied into the master table. However, the master table cannot contain frequencies that reference the same channel number or frequencies that are separated by less than 1kHz. ADDING A FREQUENCY/CHANNEL Enter a frequency into the receiver via: Codelog > 1)Config## > 3)Freq/CH > 1)Add > 1)Radio (or) 2)Acoustic The LCD prompts for a frequency to be entered.
ENABLING AND DISABLING A FREQUENCY/CHANNEL Individual frequencies in a frequency table can be enabled (available for scanning) or disabled (skipped). During a scan, a frequency can be temporarily removed from the scan cycle until it is needed again. The receiver only scans frequencies that are enabled. By default, all frequencies entered are considered to be enabled. For example, if a transmitter using a frequency of 148.
All frequencies in a frequency table can be deleted via: Codelog > 1)Config## > 3)Freq/CH > 2)View/Modify > 1)Del > 7)Yes ENABLING/DISABLING TABLE (or) 9)No ALL FREQUEN CIES IN A FREQUENCY All frequencies in a frequency table can be enabled (available for scanning) or disabled (skipped). During a scan all frequencies can be temporarily removed from the scan cycle. By default, all frequencies entered are considered to be enabled. The receiver only scans frequencies that are enabled.
2)EN, 3)Dis, 4)ID, and 5)Sen. The first number in brackets after the title indicates whether the frequencies in the frequency table are Enabled (2) or Disabled (3). The second number whether the transmitter type in use is ID only (4) or ID with Sensor (5). After a key (2, 3, 4, or 5) is pressed, the number in the brackets changes accordingly.
1)CONFIG## > 4)AN T / HY D R Antennas pick up signals from transmitters and delivers them to the SRX800 receiver. A typical configuration of the SRX800 system can accommodate up to eight antennas, which can be monitored one at a time or simultaneously. Antenna inputs accept signals from radio antennas and upconverted acoustic sources (hydrophones). To use more than one antenna, the ASP-8 switchbox is needed.
connected to a UUC (Ultrasonic UpConverter), which is then connected to an antenna port on the receiver’s ASP-8. The UUC converts the hydrophone’s acoustic signals to radio signals. UNDERSTANDING ANTENNA GROUPS Antennas can be radio or upconverted hydrophones. However, they are treated as separate groups by the receiver. For example, in an eight antenna configuration, if radio antennas are connected to antenna ports 1,2, 4, and 6, then this is referred to as the Radio Group.
Antennas are added using antenna port numbers and should be entered in the order in which they should be scanned. Available antenna port numbers are from 1 through 8. After each antenna port number is entered, a slash [/] automatically appears, to separate the antennas being entered (e.g. 1/4/5/2/8/6). Press the ENTER key to apply the changes (do not press the END/ESC key).
• Enter a value from 1 through 8 to make a single antenna the master. The value entered corresponds to an antenna port number on the ASP-8. • Enter the value as 9 to designate NO antenna as master After a value has been entered, the receiver returns to the menu selections page.
ASSIGNING A GAIN VALU E TO THE ANTENNA PORT ON THE FRONT PANEL Assign gain values to each antenna via: Codelog > 1)Config## > 4)Ant/Hydr > 4)Gain > 2)AH0 Gain ASSIGNING G AIN V ALUES TO MASTER ANTENNAS Assign gain values to master antennas via Codelog > 1)Config## > 4)Ant/Hydr > 4)Gain > 3)Radio Master Gain Gain (or) 4)Acoustic Master If the master designation has been set for all radio antennas or hydrophones in either the radio or hydrophone groups, then that gain value is used for all members of
a radio frequency then the receiver starts with either the first radio antenna or the Radio Master Antenna in the radio group. If this frequency is an acoustic frequency, then the receiver starts with either the first hydrophone or the hydrophone master in the hydrophone group. The following provides an example of how a simple configuration would proceed with scanning using frequency priority.
ENABLING M ASTER ANTENNA PREVIEW The Master Antenna Preview allows the receiver to conserve its power resources while waiting for a valid detection. If Total Scan Time is also enabled, then further power savings can be achieved (refer to section on Enabling Total Scan Time for details). A Master Antenna must be defined for at least one antenna (or group of antennas) for the Master Antenna Preview to work (refer to the section above on Assigning a Master Antenna).
• Master Antenna Preview is automatically disabled if antenna priority is enabled. Enable Master Antenna Preview via: Codelog > 1)Config## > 4)Ant/Hydr > 5)Priority > 2)En/Dis Master Preview Selecting 2)En/Dis Master Preview changes the preview from being enabled or disabled. Watch the first line of the LCD to see which setting is applied. USING ANTENNA PRIORITY Antenna priority is used when it is desirable to scan all frequencies in a frequency table before moving on to the next radio antenna/hydrophone.
• The receiver then returns to the radio master antenna and repeats the cycle until either the scan is stopped, the battery expires, or all of the receiver’s data memory is used When an antenna is being scanned, the frequencies are scanned according to their scan order (the order they were entered into the frequency table). If an antenna group is designated as a master, then all of the antennas/hydrophones in the group are scanned simultaneously.
1)CONFIG## > 5)FILTERS Received signals can be qualified for storage and display by using a set of filters. This section of the manual describes two filter classes, one pertaining to signals (frequency/channel and transmitter ID) and the other to signal quality (signal strength and pulse timing). ID FILTER Filtering provides the ability to filter Channel plus ID combinations or IDs only without altering a configuration’s frequency table.
rejected (and all combinations that are not in the list are accepted). Any detections with the specified Channel plus ID combination in the list are not recorded by the receiver or displayed (on the LCD or by the SRX Host). Add a Channel plus ID combination to the reject list via: Codelog > 1)Config > 5)Filters > 1)ID Filter > 2)Set Reject Ch/ID >1)Add Enter the channel followed by the ID. The display automatically inserts a slash [/] between the two values as they are entered.
The first entry is shown in the first line of the display. To view the next entry, use the Right Arrow key to advance through the list. An entry in the list can be deleted at any time by pressing the 1 key [1)Del]. REJECTING ID ONLY Use this feature to create a list of transmitter IDs that will be rejected during a scan. All IDs added to this list are rejected (and all IDs that are not in the list are accepted).
Any entry in the accept list can also be viewed and deleted. View an entry via: Codelog > 1)Config > 5)Filters > 1)ID Filter > 5)Set Accept ID > 2)View/Del The first entry is shown in the first line of the display. To view the next entry, use the Right Arrow key to advance through the list. An entry in the list can be deleted at any time by pressing the 1 key [1)Del].
Typically, the noise threshold is set to 30, but ideally it should be set to reflect the environment in which a study is taking place. Set the noise threshold via: Codelog > 1)Config > 5)Filters > 2)Pulse Filter > 2)Noise Threshold The maximum noise threshold value that can be entered is 99. ENABLING/DISABLING THE PULSE WIDTH FILTER The minimum Pulse Width filter threshold is defined through the SRX Host, and is typically set to 2ms.
1)CONFIG## > 6)SENSORS The receiver needs to know the Sensor Class and the types of sensors that are used by the transmitters in a study. Four types of sensors are available: temperature, pressure, activity, and EMG. Only three types can be used by the receiver at any given time. For the receiver to interpret and display the sensor data properly, it must know the sensor’s range and granularity.
Activity sensor type and the number 3 appears in the display. The display automatically places a slash [/] between each selection (e.g. 1/2/3). After three selections have been made, the receiver automatically returns to the Sensors page. If fewer than three selections are made, press the Enter key to apply the changes and return to the Sensors page.
Codelog > 1)Config > 6)Sensors > 3)Param > 3)Act > 2)Max This value is typically set to “1” (moving). Set the number of levels for activity via: Codelog > 1)Config > 6)Sensors > 3)Param > 3)Act > 3)Level SETTING PARAMETERS FO R EMG Set the minimum EMG value via: Codelog > 1)Config > 6)Sensors > 3)Param > 4)EMG > 1)Min Set the maximum EMG value via: Codelog > 1)Config > 6)Sensors > 3)Param > 4)EMG > 2)Max To change the sign of a value for any of the parameters above, use the +/- key.
2)SCAN > 1)CONTINUE TO LOG DATA Actions available under this menu item are: • Start a scan • Delete all data from the receiver STARTING A SCAN CYCLE A scan cycle is initiated via: Codelog > 2)Scan > 1)Continue to Log Data Once a scan is started, no changes can be made to the active configuration, except when the scan is paused.
P AUSING A SCAN Pause a scan via: Codelog > 2)Scan > 1)Continue to Log Data > 0)Pause Scan The Pause function suspends the scan cycle on the frequency and antenna that is being scanned. The receiver does not change the frequency or antenna it is scanning when pause is selected, but it does continue to log data for that frequency and antenna. Any settings that are changed while paused are applied only to the frequency and antenna that the receiver was scanning when pause was selected.
The first line in the display updates to show which unit has been selected (e.g. F). Change the unit for pressure via: Codelog > 2)Scan > 1)Continue to log data > 2)View > 2)Temp, pressure units > 2)PSI/m The first line in the display updates to show which unit has been selected (e.g. PSI). CHANGING THE SET DELTA FREQUENCY When adjusting the frequency manually via the keypad, the receiver increases or decreases the frequency (in kHz) to scan by an amount equal to the Frequency Delta increment.
GPS cannot be used if the receiver is logged off. It is possible, however, to log off from the receiver while the receiver is attempting to acquire a GPS position. When logging back on, the display shows the results of the GPS position. CRTO cannot be used with the GPS 2D-positioning feature of the receiver, however it still allows the GPS clock to function.
2)SCAN > 2)DEL ALL DATA (PASSWORD) DELETING ALL DATA IN THE RECEIVER Data cannot be deleted from the receiver unless the password is provided. As soon as a password is provided, the receiver deletes all data permanently. No warning is given prior to deletion. 3)MASTER FTABLE Under this submenu item, you can: • Enter in the frequency to be used by any UUCs (ultrasonic upconverters) connected to the ASP-8. • View frequencies in the Master Frequency Table.
Use the Right and Left Arrow keys to move forward and backward through the list. The display provides the frequency and channel, as well as which configurations use that frequency and channel. DOWNLOADING DATA Please refer to the SRX Host manual for details on how to download data through direct Serial, USB, or modem connections.
While additional fields in a data record are needed to support CRTO, GPS, and Sensor data (or combinations of these), some data fields are always provided: • Detection time (or start time and duration for CRTO records) • Channel ID • Transmitter ID • Antenna port number • Signal strength Data records also include Environment Data. Environment data is related to all of the settings that influence a Scan Cycle.
When the receiver begins collecting data, a complete environment record is stored in the memory with a time stamp. After that, only changes to the settings are stored, with a time-stamp indicating when the change took affect.
APPENDIX B: ADDITIONAL INFORMATION Annexe B: Information Complimentaires A. This device complies with FCC Part 15 and Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Cet appareil est conforme aux normes FCC partie 15 et Industrie Canada exempts de licence (s) standard RSS.
WARNINGS Changes or modifications not expressly approved by Lotek Wireless Inc. could void the user's authority to operate the equipment. MISES EN GARDE Les changements ou modifications non expressément approuvés par Lotek Wireless Inc. peuvent annuler le droit de l'utilisateur à utiliser l'équipement.
