SKY497 Installation Manual TRANSMITTER RECEIVER COMPUTER UNIT P/O J1 SEE NOTE #13 P/O P1 HDG_FLGHDG_FLG+ SYNC_LO SYNC_HI SYNC_Z SYNC_Y SYNC_X SEE NOTE #6 52 53 54 55 64 65 66 TP ORN TP BLU WHT HDG FLAG HDG FLAG + DRIVE MOTOR 3 UNREG +15 BLU WHT BLU WHT BLU ORN WHT SEE NOTE #12 BLU WHT BLU WHT BLU ORN WHT DRIVE MOTOR 1 ORN FLAGFLAG+ P2 BOT H A NC P1 TOP V J BLU WHT NC AIRFRAME GROUND HDG_FLGHDG_FLG+ SYNC_LO SYNC_HI SYNC_Z SYNC_Y SYNC_X DPWR+15_OUT DPWR-15_OUT DSPLY_GND HSYNC_OUT_HI
SKY497 Installation Manual CAUTION: P/O J1 THE AIRCRAFT TRANSPONDER MUST HAVE SHIELDED SUPPRESSION CIRCUITRY TO ENSURE THAT SKYWATCH DOES NOT DISPLAY ITSELF AS A TARGET (TA).
SKY497 Installation Manual TRANSMITTER RECEIVER COMPUTER UNIT P/O J1 SEE NOTE #13 P/O P1 HDG_FLGHDG_FLG+ SYNC_LO SYNC_HI SYNC_Z SYNC_Y SYNC_X SEE NOTE #6 52 53 54 55 64 65 66 TP ORN TP BLU WHT HDG FLAG HDG FLAG + DRIVE MOTOR 3 UNREG +15 BLU WHT BLU WHT BLU ORN WHT SEE NOTE #12 BLU WHT BLU WHT BLU ORN WHT DRIVE MOTOR 1 ORN FLAGFLAG+ P2 BOT H A NC P1 TOP V J BLU WHT NC AIRFRAME GROUND KI-525 INDICATOR ALTERNATE STEPPER HEADING INPUT DIRECTIONAL GYRO COMPASS SEE NOTE #6 HDG_FLGHDG_FL
SKY497 Installation Manual CAUTION: THE AIRCRAFT TRANSPONDER MUST HAVE SHIELDED SUPPRESSION CIRCUITRY TO ENSURE THAT SKYWATCH DOES NOT DISPLAY ITSELF AS A TARGET (TA).
SKY497 Installation Manual 2.5 DISPLAY LOCATION The display should be mounted in a location easily accessible and clearly visible to the pilot. In selecting a location, consider the following: Magnetic Effect Where possible to avoid it, the display should not be mounted within 3 inches (8 cm) of an electric turn and bank indicator, as the magnetic effect of the turn and bank motor may affect the display presentation. (a common symptom of magnetic interference is a wobbling or vibrating display raster.
SKY497 Installation Manual After fabricating the cables and before installing the equipment, use the interconnect diagram to verify continuity between each pin and its opposite end termination. Check resistance to ground between each connector pin. When a path to ground is detected, verify its validity. 2.6.1 Antenna Cables NOTES 1. Use of any cable not meeting BFG Avionics Systems specifications voids all system warranties. 2.
SKY497 Installation Manual At the antenna, each connector has an identifying color band. To ensure the cables are connected to the correct port, affix the following marking at the termination points of each cable: Sum (Sigma) Port The Sum (Sigma) port is the forward antenna connector. It is marked with a blue band. Fabricate the sum antenna cable with a TNC connector at each end. Affix a blue marking band on each connector. At the TRC, the sum port (J9) is identified with blue marking.
SKY497 Installation Manual 2.6.2 Configuration Jumpers All installation dependent selections are defined via configuration jumpers. The configuration jumpers, as detailed in table 2-3, are installed on the TRC mating connector (P1). Figure 2-4 shows the contact arrangement for connector P1. Configuration ground is available at P1-12 and P1-13. Figure 2-4. Connector P1 Contact Arrangement Table 2-3.
SKY497 Installation Manual Heading flag logic, as detailed in table 2-4, is programmed with a jumper between P1-68 (Heading Flag Sense) and configuration ground. NOTE If the heading system has a low level flag between 1.5 VDC and 2.7 VDC (when valid), P1-68 (HEADING FLAG SENSE) should not be jumpered to ground and P1-53 (HDG_FLG+) must remain unconnected. Table 2-4.
SKY497 Installation Manual Table 2-6.
SKY497 Installation Manual The display cable consists of the following (refer to figure 2-5). 1. Twisted, shielded, jacketed triad #22 AWG Colors: White, Blue, Orange Shield: Tin plated copper braid, 90% min. Jacket: FEP .007 in. min., White jacket 2. Twisted, shielded, jacketed pair #24 AWG Colors: White, Blue Shield: Tin plated copper braid, 90% min. Jacket: FEP .007 in. min., Blue jacket 3. Same as 2 except Orange jacket. 4. Same as 2 except Green jacket. 5. Same as 2 except Red jacket. 6.
SKY497 Installation Manual 2.6.4 Heading Input Cable The heading input cable connects the TRC497 to the aircraft heading system (refer to the Interconnect Wiring Diagram, figure 2-2 or 2-3). This cable provides XYZ and HC aircraft heading information (or King KCS55 stepper signals) to the TRC497. FLAG lines are also included in the heading input cable to provide the TRC497 processor with flag status (or heading valid) information.
SKY497 Installation Manual 6. 7. FEP Teflon® jacket .013 in. - .023 in., clear (translucent). Marker tape with vendor P/N. The sub-cable color-coded jackets and shields should be left on the sub-cables as close to the connector as practical to provide the required shielding and to identify the sub-cables. Table 2-8. Heading Input Cable Vendors US COMPANY CABLE P/N Dallas Avionics 1-800-527-2581 214-320-9776 FAX 214-320-1057 WX-5 (6.
SKY497 Installation Manual 2.6.5 ARINC 429 Data Cables ARINC 429 Data Input Cable. The two ARINC 429 receivers can be used to input data from other avionics systems. The following labels are supported: LABEL FUNCTION 164 Radio Altimeter (see note) 203 Barometric Altitude (Uncorrected) 320 Magnetic Heading NOTE The radio altimeter must provide full range output between 0 and 2500 feet. Not all altimeters provide this full range output.
SKY497 Installation Manual 2.6.6 Altimeter Input Cable NOTE Only one altimeter input source (Gray Code or ARINC 429, not both) should be connected. The altimeter input should be from the same source that is interfaced with the transponder or it must be at least as accurate as that source, i.e., ± 125 ft. These signals are Gilham Code inputs coming from an airdata computer or altitude digitizer. These 10 lines may be connected in parallel with the aircraft transponder.
SKY497 Installation Manual 2.6.9 Ground Proximity Warning System (GPWS) Input This input senses a GPWS alarm and temporarily disables the audio alert output until the warning clears. The input can be either a constant flag signal or an alternating flag output. The flag must be cleared for five (5) seconds before the TRC accepts a “NO ALARM” condition and restores audible alerts. NOTES 1. If the aircraft is equipped with GPWS, it must be connected to the TRC. 2.
SKY497 Installation Manual 2.6.13 Landing Gear Switch Input This signal line is to be connected to the landing gear switch to sense the position of the landing gear. For the GEAR input (P1-87) line, use #22 AWG (minimum) unshielded cable. Routing and length are not critical to system operation. If the aircraft does not have a landing gear switch input (e.g., fixed-gear aircraft), leave this input unconnected.
SKY497 Installation Manual Figure 2-8. Antenna Mounting Holes Figure 2-9. Directional Antenna Installation 2-24 Rev.
SKY497 Installation Manual 2.8 TRC MOUNTING TRAY INSTALLATION To accommodate different space limitations, the standard TRC mounting tray (P/N 805-10870-001) can be channel or flat mounted. To flat mount the tray, simply remove the eight 6-32 (Phillps) screws that secure the channel to the tray. The ruggedized TRC mounting tray (P/N 805-10870-003), required for rotorcraft installations, must be channel mounted. Figure 2-10. Mounting Holes for Standard Mounting Tray, P/N 805-10870-001 Figure 2-11.
SKY497 Installation Manual 1. Position tray at the installation location. 2. Determine centers for mounting holes, and drill for required fasteners. See figure 2-10 (standard tray) or 2-11 (ruggedized tray). 3. Secure tray in place using suitable 8-32 (channel mount) or 6-32 (flat mount) hardware. 2.9 TRC INSTALLATION CAUTION Before placing the TRC into its mounting tray, de-energize or disconnect all power and signal sources and loads used with the SKY497 system. 1. 2. 3. 4. 5.
SKY497 Installation Manual Figure 2-12. TRC497 Installation 2-27 Rev.
SKY497 Installation Manual 2.10 MOUNTING THE WX-1000/SKY497 DISPLAY The display mounts in a standard 3ATI panel cutout (figure 2-13). The unit may be mounted from the front or rear. The following paragraphs describe the installation procedure. 2.10.1 Panel Cutout. Refer to figure 2-13 for the panel cutout and mounting hole dimensions. Drill and punch the required holes. The instrument panel cutout is a standard 3ATI. Figure 2-13. Instrument Panel Cutout and Mounting Holes 2-28 Rev.
SKY497 Installation Manual 2.10.2 Display Installation Figure 2-14 shows a typical display installation. The display can be mounted to the instrument panel from the front or from the rear. An optional mooring clamp is available for increased stability in high-vibration environments. Figure 2-14. Display Installation Use rivnuts® or a mooring clamp to secure the display to the instrument panel. NOTE 1. The mooring clamp is not furnished with the display. 2.
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SKY497 Installation Manual CHAPTER 3 INSTALLATION CHECKOUT 3.1 INTRODUCTION This section contains instructions for using the BFGoodrich Avionics Systems TT391 Flightline Tester to do post-installation checkout of the BFG Avionics Systems SKY497. Detailed setup, operation and maintenance information for the TT391 Flightline Tester is provided in the TT391 Instruction Manual. NOTES 1. This procedure assumes familiarity with the set up and operation of the TT391 Flightline Tester. 2.
SKY497 Installation Manual 3.3. CHECKOUT PROCEDURE The TT391 Flightline Tester simulates both a ground based secondary surveillance radar (SSR) and an airborne transponder. With the SKY497 set to GROUND TEST (i.e., the barometric altimeter is simulated to 50,000 ft, heading simulated to 0 degrees, and the radar altimeter simulated to 2,500 ft) the TT391 will simulate two targets; a Traffic Advisory (i.e., a solid circle) at ¼ nm and Other Traffic (i.e., open diamond) at 4.5 nm.
SKY497 Installation Manual Figure 3-3. Standby Screen 3. Turn SKY497 OFF and then enter the Service Menu (see paragraph 4.4) by holding the left two buttons (soft-keys 1 and 2) depressed as the system is turned ON. 4. From the Service Menu, calibrate the TRC to the directional antenna (see paragraph 4.4.1). 5. Return to the Service Menu and select System Data (see paragraph 4.4.3). a. Verify status and save the configuration jumpers (see paragraph 4.4.3.2, Configuration).
SKY497 Installation Manual 12. Position the aircraft with the nose aligned on any 90 degree heading. Avoid areas within 250 ft of obstructions (e.g., hangers, large aircraft, control towers, etc.) where there is a potential for multipath problems. Locate and mark test points at 30 degree intervals (i.e., 000, 030, 060, 090, 120, 150, 180, 210, 240, 270, 300, and 330 degrees) with respect to the directional antenna. Mark these points at the same distance, between 100 and 150 ft, from the aircraft. 13.
SKY497 Installation Manual Figure 3-4. Typical Patch Antenna Tripod Mount 15. From each test point (see step 12): a. Position the TT391 Patch Antenna facing the SKYWATCH aircraft under test. b. Set the TT391 POWER switch to the ON position. c. Verify that the display shows, in the direction (± 30 degrees) of the TT391, two targets; a Traffic Advisory (i.e., a solid circle) at ¼ nm and Other Traffic (i.e., open diamond) at 4.5 nm.
SKY497 Installation Manual 3.4 SELF TEST 1. Turn SKYWATCH OFF and then: a. Make sure the aircraft's transponder is in the STANDBY, ON, or ALT mode. NOTE After power up, it may take a couple of minutes for the altitude encoder to return a valid altitude to the transponder and SKY497. b. If installed, power up the radio altimeter. c. Make sure all compass/HSI flags are cleared from the aircraft's instruments. 2. Turn SKYWATCH ON.
SKY497 Installation Manual b. Check audio connection to the TRC: 1) 600-ohm audio systems should be connected to P1-92 (AUDIO_H). 2) 150-ohm audio systems should be connected to P1-91 (AUDIO_L). 3) Audio common is connected to P1-90 (AUDIO_C). NOTE Audio output from the TRC is transformer isolated. 7. If SKYWATCH fails the self-test: a. The "SKY497 Failed" screen (see figure 3-6) with an error message indicating the type of failure will be displayed. b.
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