Advertisement
Quick Links
The STX 165 is a Mode C transponder capable of transmitting 4076 different codes in response to ground radar interro-
gations. All operations of the STX 165 are controlled through the front panel controls. The controls are as follows:
Power/Mode Control
The Power/Mode
Control
Data Knob
Enter Pushbutton
STX 165 Operation
VFR Pushbutton
The STX 165 will come on anytime power is applied to the rear connector. It is recommended
that power to the STX 165 is 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 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 momen-
tarily. This will cancel all programming and show his 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
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 programing the
squawk code and to select the counter function in the lower right display when not in the cod
selection mode.
The Data know can also be pressed to Enter data after it has been programmed.
Select Knob
Ident Pushbutton
Data Knob
Enter Pushbutton
Advertisement
Summary of Contents for Dallas STX 165
- Page 1 STX 165 Operation The STX 165 is a Mode C transponder capable of transmitting 4076 different codes in response to ground radar interro- gations. All operations of the STX 165 are controlled through the front panel controls. The controls are as follows:...
- Page 2 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...
-
Page 3: Code Selection
After the software versions are displayed, the STX 165 display will revert to the normal operating mode. The upper left portion of the display will show the current tansmitter 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. - Page 4 Timers The STX 165 has three timer functions that are displayed in the lower right hand corner of the display. These are Elapsed Flight Time (EFT), an up counter (CNT UO) and a down timer (CNT DOWN). To select a timer rotate the Data knob either clockwise or counter clockwise.
- Page 5 Counter Up The Counter Up (CNT UP) allows the pilot to time various auxilary functions. It can be activated and reset at any time. To use the CNT Up function: Rotate the Data Knob until CNT UP is displayed. It will initialize on 0.00S if has not been used since system start up.
-
Page 6: User Configuration
User Configuration While we obviously can’t be all things to all people, the STX 165 allows the user to select certain parameters that he may find use full. It is recommended the user only change these configurations when on the ground. This will keep from interfering with his pilot duties and ensure uninterrupted response to ATC radar interrogations. - Page 7 EFT START 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.
- Page 8 The STX165’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 minimum intensity: BRIGHTNESS Rotate the Data knob to select the MIN BRIGHTNESS page.