AT11DV USER MANUAL - Blue Planet Geomatics
Contents
1. g Page 1 of 7 Your source for quality GNSS Networking Solutions and Design Services Contents PESTO Errors ecesesisaserscttewcte E 2 E AUS e E A E A E E E vey E N I E 2 Adjustable Atentat ON seeen eeni era aE iae Aaa 2 RET O e E E E tans icaessseaeeaeeteeeeeteaee 2 LE AL a E E E EE E 2 LETO E A E EE E EE EE TE E 2 NORP ONN ee E E 3 Pema LDC DE VO O in ania sunenecbonssanaascentceoncaansus sant ovenwas tusesoastweacoantasstanenees 3 Antenna Current Fault Detection Ant Fault Detect cecccecceescesecseeseensseeees 3 Oscillation Detection OSC Detect ccecccecccsecceeccesccceeccessceeceeecseseseesseeseseeeseuees 3 ECOD PT gener reene eee rete oe ere eR nee re eer eer rer eer ree ern err rete 3 Me TTS I AG esas tee est E E E tate vhseceadeguesbensPeonetenss 3 DEM al POE COME L ror A EE E E E E EA E E 4 OA aay eects E E E E E E E 4 abea e IOS E E E E E E AE E E E E ET EES 4 mT MOE ea e E E E E RAE 4 LCD Display and Mena Sy SUC sscacccnessaseanacecedoneUsasensiecatatenet e Ta 5 DMC ONTO ern e E E S E E E O E 6 BA RO e pene tre ener ce tere ere enan cr rere tre eer tyre tere Uren cry rere treger ey errr ureeerr rere 6 PRU ALOU ciaee cs Sasee oe cence nae ts A E E E 6 COTA asco ie dante pnnteesuacnue tate A E E E E 6 PV Oeste cae A E E E N E AE E E E 7 Anema OW er Oi OEE acces see case cteases ete eeeactia a de emeeaaieasiesousetena als 7 PMN MM he VD are E E E A E E E E E suet aaesces 7 AT11DV USER MANUAL Document number 430 Rev 002 92. URL of GPS Source for service and support Instructions 1 Press middle down button until Help appears on screen 2 Press Enter 3 View information specific to product by using up down arrows Antenna Power On Off The Antenna operation turns the antenna power on and off Note Antenna power is on the input port This action does not affect the output port so it will not turn off power to the devices powered by the output port provided the output port is a pass DC PDC port Antenna VDC Displays the voltage that is available to power the output ports Note This only displays the voltage available to the ports If a port is DCB DC blocked then this does not mean there is voltage present on the port Only if a port is enabled to pass DC PDC will the voltage be available on the port s No matter what this reads there will only be voltage ona port if it is PDC Document number 430 Rev 002 a a on I GPS GPS Attenuator ATT1DV xI _ n GPS GPS Attenuator AT11DV E f 9 JUL 08
3. is flat i e it is a loop of items that can be selected for modification or selected to display the current values or settings Once an item is selected the up and down button can be used to change the displayed values of the particular item After approximately 10 seconds with no user input button presses from the user or characters on the serial port the menu returns to the main screen and displays gain Document number 430 Rev 002 9 JUL 08 Page 6 of 7 Your source for quality GNSS Networking Solutions and Design Services Menu Options Brightness sets the level of brightness of the LCD back light eS ee Ve GPS GPS Attenuator AT11DV Instructions 1 Press middle down button 2 Press Enter 3 Adjust brightness using up down buttons Attenuation Sets attenuation of the device Instructions 1 Press up or down button until Level appears onscreen 2 Press Enter 3 Adjust gain level up or down using up down buttons Contrast Sets the contrast of the LCD display era aa Instructions 1 Press middle down or up button until Contrast is displayed on screen 2 Press Enter i 3 Adjust contrast using up down buttons a OWS TNO oces Document number 430 Rev 002 9 JUL 08 Page 7 of 7 Your source for quality GNSS Networking Solutions and Design Services Help The Help menu displays the serial number of the device the version of the firmware and the
4. JUL 08 Page 2 of 7 Your source for quality GNSS Networking Solutions and Design Services GPS Attenuator AT11DV Description The AT11XDV is a RF L band attenuator intended to operate with GPS frequencies and signal levels It has one input RF port and one output RF port Using front panel buttons or an RS232 serial port the attenuation can be adjusted in 1dB steps over the operating range of the device Features The AT11XDV contains standard features but many described are not standard and require the addition of optional circuitry these may not be installed and or applicable to your device Adjustable Attenuation The attenuator is capable of adjustable attenuation from OdB to 55aB RF Filtering There are three FF filtering options L1 L2 filtering With L1L2 filtering the attenuation range provided will be in the frequency pass bands of L1 1575 42 MHz and L2 1227 5 MHz L1 filtering With Lifiltering the attenuation range provided will be in the pass band only i e 1575 42 MHz Document number 430 Rev 002 9 JUL 08 d Page 3 of 7 Your source for quality GNSS Networking Solutions and Design Services No RF filtering With no RF filtering the attenuation range will be approximately the same for all frequencies across the L band 1 2 GHZ see data sheet for response performance Antenna RF Line DC voltage The AT11DV is capable of providing a fixed DC voltage out each RF port to power other de
5. gating through the menu with the up arrow down arrow and Enter key or equivalent ESC sequences The device will echo the text to the serial port and in most cases will equal or be more verbose to the front panel LCD Note the letter D amp d will also function as the down arrow key and the letter U amp u will function as the up arrow key The terminal ESC sequences ESC B or 0x1B and then a 0x41 will function as an up arrow key The terminal ESC sequences ESC A or 0x1B and then a 0x41 will function as an up arrow key If there are any dinosaurs reading this these are VT100 terminal escape sequences Command Mode In command mode the unit can be controlled or operated by sending specific commands as opposed to navigating menus via key strokes Though there is nothing stopping a user from sending individual key strokes i e characters programmatically and navigating menus it is neither needed nor recommended A command set Is provided to execute functions directly so the unit can be controlled by a machine or computer as in an automatic test setup Document number 430 Rev 002 9 JUL 08 Page 5 of 7 Your source for quality GNSS Networking Solutions and Design Services See the AT11DV_A11XLV_Serial_Interface_Reference for a complete list of commands LCD Display and Menu System From the top level of the menu each press of the up or down button navigates the menu system The menu system
6. l display an error message on the display and via the serial port The unit will not retry and requires a key press or equivalent character s from the serial port to clear the error and retry by restoring antenna power The exact trigger level s can be set via the serial port AT11DV_A11XLV_Serial_Interface_Reference lf you do not order the serial port option this level is preset at the factory LCD Display The A11XLV can be equipped with a LCD display to provide feedback to the user LCD Backlight The LCD display can be equipped with an LCD backlight The backlight is only available with the power supply option Document number 430 Rev 002 9 JUL 08 f Page 4 of 7 Your source for quality GNSS Networking Solutions and Design Services Serial port control The A11XLV can be controlled via an RS232 port Operation In normal operation the AT11DV is controlled via the front panel using buttons There are three buttons UP DOWN and ENTER The unit can also be controlled via an RS232 port using a terminal emulator either in terminal mode or in command mode programmatically Terminal Mode Connection to the device is achieved by using either a standard terminal device or in a more likely scenario a computer utilizing terminal emulation software such as Hyperterm Terra Term Kermit etc The unit can be operated with computer keys in exactly the same manner as pressing the buttons on the front panel of the device by navi
7. vices in the RF signal chain The unit can be externally powered by 110VAC 220VAC 240VAC or from a DC source a few volts higher than the desired antenna line voltage e g if you want 5 volts out then you will need to put in approximately 8 VDC into the device to overcome the losses of reverse polarity diodes regulator losses and diode output OR function Antenna Current Fault Detection Ant Fault Detect If the antenna current exceeds either a high or low threshold value then the device will remove power from the antenna or input port and will display an error message on the display and via serial port After approximately 10 to 13 seconds the unit will retry to see if the current fault condition has been removed by clearing the error message and momentarily reconnecting power to the input port If a high or low threshold current level is no longer exceeded then the device will once again operate normally The exact trigger level s can be set via the serial port AT11 A11XLV Serial Interface Reference If you do not have the serial port option the factory defaults are low current threshold levels less than 15ma and high threshold levels greater than 150ma Oscillation Detection OSC Detect The AT11DV is capable of detecting high levels of RF indicative of feedback from the device input to the output or a runaway condition If the OSC Detects circuitry threshold is exceeded the unit will remove power from the antenna or input and wil
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