STX 165 User Manual
Contents
1. selected 8 3700 Osuna Road NE Suite 711 Albuquerque NM 87109 www sandia aero2. STX 165 User Manual 3700 Osuna Road NE Suite 711 Albuquerque NM 87109 www sandia aero 306105 Rev A DRN434 This document and the information contained herein is the proprietary data of SANDIA aerospace Corpora tion No part of this document may be transmitted reproduced or copied in any form or by any means without the prior written consent of SANDIA aerospace Due to SANDIA aerospace s continued product and quality improvement programs information contained in this document is subject to change without prior notice Copyright 2010 SANDIA aerospace Corporation all rights reserved Printed USA Revision Date Description Approval IR 20120222 MR102 L Harrison A 20130311 DRN 434 L Harrison i STX 165 Operation The STX 165 is a Mode C transponder capable of transmitting 4096 different codes in response to ground radar interrogations All operations of the STX 165 are controlled through the front panel controls The controls are as follows Power Mode Control VFR Pushbutton Ident Pushbutton Select Knob Data Knob Enter Pushbutton The Power Mode Control The STX 165 will come on anytime power is applied to the rear connector It is recom mended that power to the STX 165 be supplied through a panel mounted avionics master switch The STX 165 can be turned off by pressing and holding the Power button for three seconds It can be turned on again by momentarily depressing the Power button The Power button has two
3. additional functions One is as an Escape mode If the operator is in a programing mode and wishes to escape to the main page he can press the Power button momentarily This will cancel all programming and show the normal display page The power pushbutton is also used to start the counters This is explained in the counter section SBY The STX 165 is in standby mode and will not respond to radar interrogations ON The STX is on and responding to radar interrogations but is not reporting altitude This is often referred to as Mode A ALT The STX 165 is responding to radar interrogations with altitude information This is often referred to as Mode C Data Knob Enter Pushbutton These are dual concentric knobs with a pushbutton action The larger Select knob is a momentary switch that is spring loaded It can be turned clockwise and counter clockwise and will return to center when released It is used to move the cursor during Code selection and to toggle through the display options in the lower left display PALT DALT and OAT Note that DALT and OAT are only available if the optional Sandia OAT probe model STP 78 is installed The smaller inner knob is the Data knob and is used to select the digit value when program ing the squawk code and to select the counter function in the lower right display when not in the code selection mode Photocell 1 The VFR Pushbutton is use to select the VFR Squawk code Pressing it a second time wil
4. ed on For example if the Auto On altitude is set for 200 feet and the STX 165 is turned on at 1200 feet the STX 165 will automatically select ALT Mode at 1400 feet EFT START ALT Note If 0 zero feet or meters is selected in AUTO MODE C ALT the STX 165 will turn on in the ALT Mode This is generally not recommended If OFF is selected the pilot will be required to select the ON or ALT Mode The STX 165 starts with the EFT displayed in the lower right hand corner of the display The user can set the EFT to begin counting at turn on or at a specified Alt above the turn on altitude It the EFT is set at 0 then the EFT will begin counting at turn on To set the EFT start altitude 1 Rotate the Data knob to select the EFT START ALT page 2 Press the Enter Pushbutton The EFT start altitude will be blinking 3 Rotate the Data knob to select the desired Auto On Altitude The altitude will change in 25 foot or 10 meter increments 4 Press the Enter Pushbutton ICING ALERT If a SANDIA aerospace STP 78 OAT probe is installed with the STX 165 the unit will provide an icing alert The icing alert is a snow flake that appears in the upper right corner of the display whenever a user preset temperature is reached To set the Icing Alert temperature 1 Rotate the Data knob to select the ICING ALERT page 2 Press the Enter Pushbutton The brackets will extinguish and the Temperature will blink 3 Rotate the Data knob until the desire Icing Ale
5. hes When activated the down timer will count down to zero and then begin counting up During the counting up phase the time will be preceded by a plus symbol 1 Rotate the Data Knob until the CNT DOWN legend is displayed You will note that the CNT DOWN time default is one minute and zero seconds 2 To program a new time press and hold the Data knob for three seconds The seconds will begin to blink 3 Turn the Data knob to enter the new time Note that you can program seconds and minutes from the seconds position as the time rolls over whenever you reach 60 seconds You can also rotate the Select knob to the minutes position if desired Counter Down User Configuration The STX 165 allows the user to select certain parameters to fit their preferences It is recommended the user only change these configurations when on the ground This will keep from interfering with pilot duties and ensure uninterrupted response to ATC radar interrogations 1 To enter the User Set UP mode the STX 165 must be in the SBY Standby mode 2 Press and hold the IDT pushbutton while turning and holding the Select knob counterclockwise for 3 seconds Note that the select knob will go to a hard stop when rotated approximately an eighth of a turn The display will read USER SETUP MODE PRESS ENTER TO CONTINUE 3 Press the Enter pushbutton Note that if the Enter Pushbutton is not pressed within ten seconds the STX 165 will exit the set up mode No
6. l recall the previous code The VFR pushbutton has an additional function Pressing and holding it for three seconds will enlarge the squawk code display When in this mode the functions on the bottom portion of the display screen will no longer be displayed Pressing and holding the VFR Pushbutton for three seconds again will exit this mode This function is useful in high sunlight condi tions particularly with bubble canopies When power is first applied to the STX 165 the SANDIA aerospace logo will be displayed along with the unit version number the last two digits of the part number the Display software version D and the Main software version M The current software versions can be seen on the SANDIA aerospace web site at www sandia aero IDT Pushbutton The IDT is the Ident pushbutton and is depressed when requested by ATC to Ident The STX 165 remains in the Ident mode for 22 5 seconds When transmitting Ident ID will be displayed in the left portion of the display 2 After the software versions are displayed the STX 165 display will revert to the normal operating mode The up per left portion of the display will show the current transmitter Mode The upper right portion of the display will show the last code that was selected prior to shut down the Pressure Altitude PALT is displayed in the lower left and Elapsed Flight Time EFT in the lower right of the display The built in encoder requires a warm up time and the PALT val
7. of the display These are Elapsed Flight Time EFT an up counter CNT UP and a down timer CNT DOWN To select a timer rotate the Data knob either clockwise or counter clockwise Elapsed Flight Time When the STX 165 is first turned on the timer function will be initialized on the Elapsed Flight Time EFT page The EFT will begin counting at system turn on or at a predeter mined altitude set by the pilot in the User Set Up mode Note that this is the differential altitude from when the STX 165 was first turned on The EFT can only be reset by turning the unit off 5 Counter Up The Counter Up CNT UP allows the pilot to time various auxiliary functions It can be activated and reset at any time To use the CNT Up function 1 Rotate the Data Knob until CNT UP is displayed It will initialize on 0 00 if has not been used since system start up 2 To start the CNT UP press the Power Mode control pushbutton 3 Press the Power Mode control pushbutton again and the timer will discontinue counting and hold the elapsed time 3 To start a new timer function press the Power Mode control The CNT UP will reset to zero and begin counting up 4 Pressing and holding the Enter pushbutton for three second will reset and hold the CNT UP at 0 00 Counter Up Counter Down The counter down CNT DOWN allows the pilot to enter a specific time and then be alerted when that time has expired This timer is especially useful for timed approac
8. rt temperature is displayed 4 Press the Enter Pushbutton 7 MIN BRIGHTNESS The STX 165 s digital display automatically adjusts to ambient light conditions The minimum intensity to which the STX 165 will adjust is set by the user To set the mini mum intensity 1 Rotate the Data knob to select the MIN BRIGHTNESS page 2 Press the Enter Pushbutton The brackets will extinguish indicating the Min Brightness can be adjusted 3 Rotate the Data knob clockwise to increase the minimum brightness and counter clockwise to decrease the minimum brightness 4 Press the Enter pushbutton to select the new setting Default VFR The STX 165 comes preset with 1200 as the VFR squawk code In some instances a dif ferent code is desirable for the VFR squawk To change the VFR squawk code 1 Rotate the Data knob to select the DEFAULT VFR page 2 Press the Enter knob The brackets will extinguish and the first digit of the squawk code will be blink indicating it can be programmed 3 Rotate the Data knob to select the first digit of the desired squawk code 4 Rotate the Select knob The first digit will go solid and the second digit will blink indicating it can be changed 5 Continue as above unit all digits are changed to the desired code 6 Press the Enter Pushbutton The blinking will stop and the brackets will return indicating the code has been selected Note It is the pilot s responsibility to insure that the proper squawk code is
9. te The STX 165 must be in SBY mode to enter the User Set Up Function The first page displayed when entering the user Set Up mode is ALTITUDE UNIT To access subsequent set up pages rotate the Data knob TEMP UNIT The STX 165 will display temperature in either degrees Fahrenheit or degrees Celsius The factory default setting is Fahrenheit To select a different temperature unit While on the TEMP UNIT page rotate the Select knob counterclockwise to select Celsius and clockwise to select Fahrenheit ALT UNIT The STX 165 can display altitude in either meters or feet The category default is feet To select a different altitude value 1 Select the ALT UNIT page 2 Rotate the Select knob Counterclockwise to select Meters and Clockwise to select Feet 6 A UTO MODE C ALT The STX 165 is designed to turn on in the Standby SBY Mode The user can select an altitude at which the STX 165 will automatically select Mode C ALT Mode This altitude is the differential altitude from when the STX 165 was first turned on To select an Auto On altitude 1 Rotate the Data knob to select the AUTO MODE C ALT page 2 Press the Enter Pushbutton The Auto Alt On altitude will be blinking 3 Rotate the Data knob to select the desired Auto On Altitude The altitude will change in 25 foot or 10 meter increments 4 Press the Enter Pushbutton Note The Auto On Altitude and the EFT Altitude are the differential Altitudes from when the STX 165 is turn
10. ue will show dashes until the proper internal temperature is reached The user can set the mode to come on in the ALT mode at start up or at a predetermined altitude differential after takeoff The same is true for the EFT display See User Set Up for a discussion of these features 3 Code Selection To select a new squawk code you will use the Data Select knob and pushbutton Press the Enter Pushbutton the first digit in the squawk code will blink Rotate the smaller Data knob until the value of the codes first digit is displayed Rotate the larger Select knob clockwise to the stop and then release The second digit of the squawk code will be blinking indicating that it can be changed Continue repeating the above steps until you have selected the desired squawk code and then Press the Enter Pushbutton The new squawk code has been selected and is now being reported to ATC Note The select knob is a spring load alternate action knob It can be turned both clockwise and counter clockwise and will then return to center Mode Selection To select the Mode of Operation you will use the Mode Control knob Rotate the Mode Control knob to select one of three transmitter Modes SBY Standby The STX 165 is on but not responding to ATC interrogations ON The STX 165 is on and replying in Mode A No Altitude Reporting ALT The STX 165 is on and replying in Mode C Altitude Reporting 4 Altitude Temperature Displays Altitude and temperat
11. ure information is displayed in the lower left display quadrant The operator can cycle through the different information by turning the Select knob the large right side knob Pressure Altitude The STX 165 has a built in TSO d altitude encoder The output of the encoder is pressure altitude and is displayed as PALT It can be displayed in either feet or meters depending on the user set up configuration Density Altitude If an optional SANDIA aerospace OAT probe is installed with the STX 165 it will display Density Altitude DALT DALT is based on the current OAT and Pressure Altitude DALT will be displayed in either feet or meters depending on the user set up configuration OAT If an optional SANDIA aerospace STP 78 OAT probe is installed with the STX 165 it will display the current Outside Air Temperature in either degrees Fahrenheit or Celsius depend ing on the User Set Up selection Icing Alert If an optional SANDIA aerospace STP 78 OAT probe is installed with the STX 165 it will display an Icing Alert in the upper right hand corner of the display when the temperature reaches a user defined temperature The Snow Flake symbol will blink for ten seconds once the Icing Alert temperature is reached then remain on solid until the temperature goes above the preset temperature Pressure Altitude Density Altitude Outside Air Temp Icing Alert Timers The STX 165 has three timer functions that are displayed in the lower right hand corner
Download Pdf Manuals
Related Search