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CDC 2A3512 Vol 1
CDC 2A3512
| Question | Answer |
|---|---|
| What is the primary master mode on the F-15 A thru D? | A/A |
| On the F-15 C/D, what system is the FDA Part of? | HSI |
| What unit is the primary source of aircraft pitch, roll, heading, acceleration, vertical velocity and present position info? | INU |
| On F-15 C/D, the 1553 mux bus consists of what? | 4 Channels 5 A/B and 7 A/B |
| On F-15 what is the purpose of the mux bus resistors? | Avoid signal reflection |
| On RAMP U-2's what component acts as the bus controller? | AVP |
| On U-2's what unit is used to input data? | UFCD |
| On the U-2 what is the primary interface for data? | MFD |
| What F-15C component transfers A/A and A/G data from the DTM to the CC? | PSDP |
| On the F-15 what type of data sets are sent to the CC by the DTM | CC and PSDP |
| A/A engagement data is recorded to the CC while the aircraft is in flight whenever the CC detects | Weapon release or trigger switch to second detent |
| What F-15E component converts DTM data and send it to the CC via the 6 A/B data bus | MPDP |
| Which OFP function interfaces with all other program functions | Executive |
| Which OFP function handles TACAN, NAV, ILS AND ILS Steer mode processing for display on the HSI | Flight Director |
| Which OFP function handle the processing of OWS | Controls and Display |
| When auditing the CC using the MPCD, what is the preferred readout format | Hexidecimal |
| Which F-15E master mode display is preprogrammed to have the same set of displays every time it is selected | Instrument |
| On the F-15E the MPDP sends discrete data to what | AIU 1 |
| The fine line letters, numbers, and symbols for all F-15E displays are produced by which mode | Stroke |
| Which format cannot be seleced on F-15E displays | A/G Radar |
| Which F-15E display format has take-command capability | TSD |
| What mux bus is no longer used on the F-15E after TCTO 807 | H009 and 6A/B |
| What happens if the F-15E with ADCP has a dual generator fail | ADCP commands itself to emergency mode |
| What are the BIT's associated with the ADCP | Power up, background, maintenance, and initiated |
| What is displayed at the lower center part of the MPD/MPCD when a failure is detected during an ADCP BIT | ADCP* |
| The main and essential communication buses internal to the ADCP operate as | Interconnected buses that split when a bus fails allowing operation using the good bus |
| A standby reticule is provided as a backup if the | CRT symbology fails |
| The HUD data processor is designed to provide power and to process the | digital and discrete signals from various A/C systems |
| In the F-15 C/D if the CC becomes inoperative the HUD set automatically switches to the seconday mode and displays the symbology of the | A/A Gun mode |
| During what mode/modes does the HUD show the A/A reticule | LCOS or GDS |
| How can each pilot select a default gun reticule mode such as LCOS or GDS | AAI interrogate switch on right throttle |
| A vertical scan line appears on the HUD during what mode/modes | A/A only |
| The ASE circle appears on the HUD during the | A/A mode |
| The ASE circle is used with the steering dot to provide a steering reference during the A/A missile mode but not in | SRM/Gun combined mode |
| What signal turns on the HUD Break X | Status signal from CC |
| In what mode does the HUD show the AOA scale | ADI |
| The display control/snap look switch on the F-15E allows the pilot to select three programmed displays for each MPD and | Take command of a system |
| The HUD data processor sends control data to the CC over which H009 bus | Bus 1 |
| When the CC fails and radar range is not available what fixed range is used for the gun reticule | 1000 feet |
| The HUD set control panel reticule switch interrupts the lead angle movement of the | A/A reticule during A/A gun mode |
| What is the purpose of having cockpit components immersed in an oil bath | Cools and electrically insulates the HVPS |
| What feature has been incorporated into the cockpit unit to protect against a HVPS over current in the EU | High voltage crow bar circuit |
| What is the helmet display unit's normal cueing capability to the right and left | 20 degrees |
| How are the three coils in the magnetic receiver unit positioned | Orthogonally to one another |
| What does the seat position sensor use to sense position | Linear potentiometer |
| On what mux bus does JHMCS communicate with the CC | 5A/B |
| How many radar modes were added with JHMCS | 3 |
| What component controls the JHMCS state | CC |
| What is the minimum time the JHMCS power must be interrupted for a cold start to occur | 250 ms |
| What magnetic phenomenon causes helmet line of sight position and orientation inaccuracies | Metallic distortion |
| What types of metal are more readily apt to cause eddy current distortion | Highly conductive |
| Eddy current and permeability distortions are compensated for in JHMCS by | Giving the EU the magnetic properties of each cockpit |
| The space in the cockpit the pilots helmet could potentially occupy is called the | Helmet motion box |
| How long can the cockpit mapping process take per cockpit | 8 - 10 hours |
| What component can store and transfer magnetic compensation data | EU and MTU |
| What factor determines whether or not the JHMCS performs a coarse or fine align | Validity of the coarse alignment |
| What is displayed on the helmet during a fine align | 2 fine align crosses, 4 edge of display segment lines and FINE ALIGN |
| How many JHMCS BIT's require operator action to select and start diagnostics | 1 |
| The JHMCS periodic BIT is initiated when | automatically after startup BIT is complete |
| How many flights worth of error codes does the JHMCS HMD BIT log maintain | 30 |
| The base display in which all other JHMCS display formats are produced is the | Aircraft and helmet data |
| HOTAS commands causing the HMD to blank are depressing the | Castle switch down and holding forward for longer than 1 second |
| When HUD masking is enabled and the helmet LOS is within the HUD masking zone, the symbology removed from the HMD is all except for | Radar LOS circle |
| The purpose of the +/- .75 degree hysteresis band about the JHMCS masking zone boundaries is to | Provide a smooth transition from masked to unmasked |
| On the F-15 C/D which NCI switch must be depressed to store the computed aircraft present position | Mark switch |
| On F-15 C/D INS, which switch enables the NCI keyboard | Ready |
| What F-15 INU sub assembly handles BIT functions | Strap down inertial nav digital computer |
| What F-15 INU section is used to communicate with aircraft systems | Scratchpad Memory |
| What signals are sent to AFCS from the INU | Pitch, roll and vertical velocity |
| ON F-15E along with pitch and roll info, the HUD also shows | align status |
| On F-15E when will the EHSI or EADI display a red X on the MPCD | Absence of INS alignment |
| What is not a primary format for displaying INS info | HUD repeater |
| The NAV pod communicates with the INU on which bus | Avionics 1553 |
| How is the GPS almanac loaded on EGI | DTM |
| On F-15E what does the EGI electronic bore-sight compare between the INS and GPS | Attitude and heading after both accomplish a GC align |
| On the F-15E which PPKS mode is a nav software in which the CC stores the last updated present position for future use if EGI or INS become invalid | Mission Navigator |
| What F-15E PPKS is the default when power is applied with WOW | INS |
| What F-15E PPKS is the default when EGI data becomes invalid | MN (Mission Navigator) |
| ON APG 70 radar the 082 receives pitch angle, roll angle and true heading from the EGI when | INS attitude is invalid |
| EGI bus failure is displayed as | EGI 8A/B |
| The A-10 CDU automatically initiates the upload of data from the DTS after the DTC is installed in the UDTU, the CDU is turned on and the | CDU start up BIT is completed |
| What A-10 GPS/INU subcomponent converts nav digital data to analog, synchro nav, and discrete signals | EGI I/O interface circuit |
| On the A-10 what symbol is displayed as two vertical lines under the magnetic heading scale | Desired magnetic heading |
| On the A-10 HUD what does the distance to go numeric consist of when displaying nautical miles | 4 digit number followed by the letter M |
| On the A-10 HUD what term describes the elevation of an updated steer point that has a valid assigned elevation | Hot target elevation |
| On the U-2 PIIIG INS navigation solutions are further enhanced by | GPS ground station updates |
| What NAV techniques are employed on the U-2 INS | Inertial NAV supported by spinning mass gyro and GPS |
| The U-2 INS contains an embedded GPS receiver to supply either extensive INS updates or | Independent NAV solution if INS fails |
| On U-2 INS what mode is used when the INU computer subsystem fails | EGPS |
| On the U-2 what info is displayed on the BCDU by pressing the EMER button on the BCDU | Location of nearest emergency airfields |
| What does the INU software use to minimize the present position errors incurred during the NAV solution blending process on the U-2 | Kalman filter |
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