Sandia Aerospace DAFJDX AIRBORNE AVIATION TRANSPONDER User Manual PilotsGuide pmd

Sandia Aerospace Corporation AIRBORNE AVIATION TRANSPONDER PilotsGuide pmd

Users Manual

STX 165STX 165STX 165STX 165STX 165Mode A/C TransponderMode A/C TransponderMode A/C TransponderMode A/C TransponderMode A/C TransponderPilot’s GuidePilot’s GuidePilot’s GuidePilot’s GuidePilot’s Guide
Copyright 2011SANDIA aerospaceAll Rights ReservedThis document and the information contained herein is the proprietary data of SANDIA aerospace, Inc. Noport of this document may be transmitted, reproduced, or copied in any form or by any means without the priorwritten consent of SANDIA aerospace, Inc. Due to SANDIA aerospace’s continued product and quality im-provement programs, information contained in this document is subject to change without prior notice.1
STX 165 Panel Mounted Mode A/C TransponderCaution: Prior to starting or turning off the aircraft engine,the avioncs master should be turned off to prevent pos-sible damage to your avionics.Note: Mimimum dispay intensity is preset by the pilot inthe user configuration mode.2The STX 165 and STX 165R (remote) are Mode A/C Air Traffic Control Beacon System (ATCRBS) transpon-ders that receive ground radar interrogations on a frequency of 1030 MHz and transmit replys on a frequencyof 1090 MHz. The STX165 is capable of transmitting one of 4,096 pilot entered codes which differ in both theposition and number of pulses that are transmitted. These coded reply’s allow ATC to display your aircraft’sposition, selected identifier, groundspeed and altitude on their radar screens. This information aids controllersin maintain aircraft separation and proper approach and departure sequencing.The STX 165R is a remote unit that can be interfaced to and controlled by other manufactures navigationssystems. For operation of the STX165R refer to the manufactures Pilot Guide of the unit controlling the STX165R This manual will only address the operation of the panel mounted STX 165.The STX 165 is a panel mounted transponder and uses a bright OLED display that is viewable in virtually alllighting conditions. The STX 165 detects ambient lighting conditions and automatically dims or brightensdepending on the conditions. The minimum display intensity can be set by the pilot in the user set up mode.The controls have been arranged to simplify data entry and retrieval while conserving valuable aircraft panelspace.
STX 165 FeaturesIn additon to displaying the transponder code, the STX 165 has the following features the provide the pioltwith vaulable informationPressure Altitude. The STX 165 has a built-in encoder that is certifiedto 35,000 feet. The Unit will disply the Pressure alti-tude in the lower left hand quadrantNote: Temperature scale and flight timer initiation altitudes are preset bythe pilot in the user configuration page.Note: Pressure altitude is derived from the STX 165’s built-in encoder andis not baro corrected. It is the sale altitue as that being transmitted to ATCOAT When Sandia’s optional ST 78 OAT probe is installedthe STX 165 will disply Outside Air Temeperature(OAT) in either Fo or Co.Density Altitude When Sandia’s optional ST 78 OAT probe is installedthe STX 165 will disply Density Altitue in feet.Icing Alert When Sandia’s optional ST 78 OAT probe is installedthe STX 165 will disply a Snow Flake in the upperright corner of the display at a preset temperature toindicate freezing and possible icing conditions.Eplased Flight Timer An elpased flight timer is intitiated at system start upor after take off at a predetermined pilot entered alti-tude. Non resetable in flightCount Up Timer A resetable count up timer is controlled by the pilot.Count Down Timer A preset time is entered and started by the pilot.3
STX 165 Display and ControlsThe STX 165 uses a bright sunlight readable OLED display that automatically dims to adjust to ambientlight conditions. The can be times however when some pilots may have a hard time reading the display,especially in bubble canopies when the STX 165’s display is pointed directly at the sun. In this case, thepilot can press and hold the VFR pushbutton for three seconds and the code will be displayed in largenumbers. In this condition, the Mode will continue to be displayed and both the mode and code can bechanged. To exit this mode press and hold the VFR pushbutton for three seconds again.The STX 165 display can be thought of as being divided into four quadrants.Upper Left Hand Quadrant is the Mode in which the STX 165 is operating.SBY: or standby the display is on and the unit fully functional, except it is not replying to transponderinterrogations.ON: The STX 165 is on and responding to interrogations but not send out the aircraft altitude infor-mation also call Mode AALT: The STX 165 is on and responding to transponder interrogation with altitude data, also calledMode C.Reply Light This is a bar that will blink at a 1 Hz rate whenever the STX 165 is replying to transponderinterrogation It is directly under the Mode.Upper Right Hand Quadrant: This displays the transponder code currently being transmitted by the STX 165Lower Left Hand Quadrant: This show the pressure altitude (PALT) being sensed by the built-in encoder andtransmitted by the STX 165. If the Sandia ST 78 OAT probe is installed the quadrant will also displayDensity Altitude (DALT) and Outside Air Temperature (OAT)Lower Right Hand Quadrant: This area shows the three timer functions, Elapsed Flight Time (EFT), TimerUp, and Timer Down (Timer DN).4Caution: Pressing and holding the VFR pushbutton for less than three seconds willcause the VFR code to be displayed and become the active code.
SELECT The SELECT knob is the large outer knob of the stacked pair on the lowerright of the STX 165. This is a momentary knob that can be turned clockwiseor counter clockwise and will move the ‘cursor’ one postion. When released,it will return to the nutral position. The SELECT knob is used to move thecursor over the code digits so that a different code can be entered by the pilot.DATA The DATA knob is the smaller, outer knob of the stacked pari in the lowerright hnad corner of the STX 165. It can be turned either clockwise or counterclockwise to enter data.ENTER The ENTER puchbutton is the smaller, outer knob in the lower right cournerof the STX 165. Pressing the ENTER pushbutton stores pilot entered data inthe STX 165. It is repersented by the international enter symbolVFR The VFR pushbutton is used to toggle between the units programmed VFRcode and the last pilot entered code.IDT The IDT pushbutton is pressed to squawk Ident when requested by ATC.When IDT is pressed the unit will stay in the IDENT mode for 22 secondsand the IDENT annunciator will be illuminated.POWER The STX 165 is designed to come on automatically when the avionics masterswitches is turned on. The STX 165 can be turned OFF by pressing and holdingthe power/mode pushbutton for three seconds. If the pushbutton is disengagedprior to the three second time out, the unit will remain in the ON mode. TheSTX 165 always comes on the last active code.MODE Turing the MODE control selects one of three MODES of operation, Standby(SBY) in which all functions are operational except that the unit is not transmit-ting reply. ON, the STX 165 is replying to interrogations but not reporting alti-tude (Mode A). ALT, the STX 1656 is replying to radar interrogation and report-ing altitude (Mode C). The STX 165 always turns on in the Standby mode. TheSTX 165’s Mode is shown in the upper left quadrant of the OLED display5
Note: Since the STX 165 uses pressure altitude to determine when to turnon, it will automatically turn off. The pilot should ensure that the unit isturned to the SBY Mode after landing.A 1200 squak code is displayed in the upper right quadrant of the units display.To change the squawk code, rotate the SELECT know once clockwise to place the cursor over the firstdigit in the squawk code. Consecutive turns of the SELECT knob will move the cursor progressivelyover each digit. Turning the SELECT knob counter clockwise will reverse the travel of the cursor.Once the cursor is over the digit to be changed, rotate the DATA knob either direct to select the desirednumber. Continue this until all the digits have been changed to the new squawk code. Then simplypress enter to activate the new code.To squawk VFR, simply press the VFR pushbutton. The programmed VFR code will be displayed. Ifyou push the VFR pushbutton inadvertently and want to return to the previous code, simply press theVFR code again.Note: Pressing the VFR pushbutton cycles between the VFR code and the last pilotprogrammed code.Pressing and holding the VFR pushbutton for three seconds causes the display togo to a large font on only the mode and squawk code are displayed. Pressing theVFR pushbutton again for three second restores to display to normal.When power is applied the STX 165 will tun on with the last active squawk code. The pilot can thenchange it to the code requested by the controller. The active code is shown in the upper right quadrantof the display.6Mode SelectionThe STX 165 automatically turns on in the SBY (standby) mode when external power is applied,normally via the avionics master switch. The pilot can use the MODE control to select On (mode A )or ALT (Mode C) if desired. The STX 165 also has the ability to automatically select ALT mode oncethe aircraft has taken off and reached at a predetermined altitude AGL. Once this altitude is sensed bythe built-in encoder the STX 165 will automatically turn on to the ALT mode. This altitude is preselectedby the pilot in the User Set up page.STX 165 Operation
A flashing bar under the mode in the upper right hand corner of the display is the STX 165’s replyannunciator. It will blink at a 1 Hz rate whenever the STX 165 is replying to interrogations ground orTCAS interrogations.Pressure Altitude, Density Altitude, Outside Air TemperatureThe STX 165 will display PALT in the lower right quadrant of the display. This quadrant can alsodisplay Density Altitude (DALT) and Outside Air Temperature (OAT) if the optional SANDIA aero-space STP 78 OAT probe is installed. Upon initial turn on the PALT display will be blanked until thetransducer hearter has come up to temperature. Depending upon the ambient air temperature, this cantake up to a minimum one minute.Note: If the optional STP 78 OAT probe is not installed only Pressure Altitude(PALT) will be displayed in the lower right quadrant.Timer FunctionsThe STX 165 has three timer functions that are displayed in the lower left display quadrant. To selectthe desired timer, rotate the SELECT knob twice clockwise or once counterclockwise. The turn theDATA knob to select the desired Timer function.Elapsed Flight Time (EFT) begins counting when the unit is powered up or reaches a preset AGLaltitude that is programmed by the pilot in the user set up mode. The EFT is not resettable after powerup. The EFT counts in minutes and seconds up to 59 minutes and 59 seconds and then begins countingin hours and minutes.Note: The TIMER UP counts in Minutes and Seconds for 59 minutes and 59 sec-onds and then displays time in hours and minutes.Caution: If the computed altitude is out of range the PALT display will show -9982feet. If there is an altitude failure the PALT display will show -9981. Note thatneither of these are valid altitudes in the normal mode.7To display the alternate functions in the lower right quanrant, turn the SELECT knob once in theclosckwise direction. The displayed data in the lower right quadrant will blink.Turn the DATA knobuntil the data you want displyed is visable. Then press the ENTER pushbutton. If the ENTER push-button is not pressed within 15 seconds the display will revert to the previous information.
Timer Up is a resettable timer that allows the pilot to time various task, such as holding pattern legs.To begin the Timer Up function, rotate the SELECT knob to the lower right quadrant, and then rotatethe DATA knob until the TIMER UP is shown. Press the ENTER pushbutton and the TIMER UPbegins to blink. Press the ENTER again and the timer begins to count up. To reset the TIMER UP,press and hold the ENTER pushbutton for three seconds. The TIMER UP will reset to 00:00. Press theENTER pushbutton while the time is blinking and the timer up will begin counting. If the ENTERpushbutton is not pressed within 15 seconds, the timer is stop blink and the counter will stay at 00:00.In this case, to begin the counter, rotate the SELECT knob over the TIMER UP display and push theENTER pushbutton . The TIMER UP will begin counting up. The TIMER UP counts in minutes andseconds up to 59 minutes and 59 seconds and then rolls over to zero and begins to count up again inminutes and seconds.Timer Down (TIMER DN) is a resettable timer to allows the pilot to preset a time into the display andwill then count down. When the count down timer reaches zero, the timer display will be gin to blinkto alert the pilot that the preset time has expired. The timer will then begin to count up with a plus sign(+) in front of the time. This enables the pilot to how far he is past his preset time. To set the time in theTIMER DN rotate the SELECT knob to the lower right display quadrant, this area will begin to blink.Rotate the DATA knob until the TIMER DN function is displayed. Press the ENTER pushbutton andthe seconds digits begin to blink. Turn the DATA knob until the desired time is in the display. Whenentering time into the seconds, the time will roll over to the minutes. Rotating the SELECT knobcounterclockwise will place the cursor over the minutes. Entering minutes separately may be thefastest way to get to a longer time.8
User Configurations allow pilots to set the STX 165 to display certain items to their preference. To setthe user configurations press and hold the IDT pushbutton while turning the SELECT knob counterclockwise. Then press ENTER. The first configuration screen will appear. Rotating the DATA knobcounter clockwise will scroll the various user set up items.TEMP UNIT: use the SELECT knob for temperatures to be displayed in either Celsius or Fahrenheit.ALT UNIT: Rotate the SELECT knob for altitudes to be displayed in either Meters or Feet.AUTO MODE ALT: This determines what altitude AGL the STX 165 will automatically transitionfrom Standby to ALT after initial turn on. It can be set in 25’ increments up to 900 feet. If 0 feet isselected, the STX165 will turn on the ALT mode. To select an altitude Press the ENTER pushbutton.The currently set altitude will blink. Use the DATA knob to select the desired altitude, and pressENTER.ICING ALERT: If the optional SANDIA ST 78 OAT probe is installed, the pilot can selted a tempera-ture at which an icing alert will be displayed. To program an icing alert temperature, Press the ENTERpushbutton. The Temperature will begin to blink. Use the DATA knob to selected a desired icing alerttemperature. Icing Alert temperatures can be set from -5 to +5 degrees C or 23 to 41 degrees F.EFT START ALT: This determines what altitude AGL the STX 165 will automatically start the EFTtimer. If the Altitude is set to 0, the EFT will begin counting at unit start up. To select an altitude Pressthe ENTER pushbutton. The currently set altitude will blink. Use the DATA knob to select the desiredaltitude, and press ENTER.BRIGHTNESS: The STX 165 automatically dims the display for the ambient lighting conditions.This feature allows the pilot to set the minimum intensity to which the STX165 will dim. To set aminimum intensity, Press ENTER and turn the DATA knob until the minimum desired intensity isdisplayed.DEFAULT VFR: This display allows the pilot to set the squawk code that will be active whenever theVFR pushbutton is pressed. This is factory set at 1200 which is the VFR squawk code for the US. Tochange the VFR code, Press the ENTER pushbutton. The first digit in the code will blink, indicating itcan be changed. Rotate the DATA knob to select a new value. Rotate the SELECT knob to select thesecond digit. Continue this until all digits have been changed to the new VFR code and then pressENTER.SET DEFAULTS: This will return all setting to the factory default setting. To reset all the usersetting, Rotate the SELECT knob counter clockwise, [YES] will be displayed. Press the ENTERpushbutton. The setting have now been reset.To exit the user set up mode, momentarily press the POWER pushbutton.9

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