 |
 |
 |
 |
 |
 |
 |
 |
|
|
|
|
|
|
|
|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
 |
Sandel SN3308 Primary Navigation Display Product FAQ
What is the Sandel SN3088 ColorMap HSI? It's a full-function, three-inch EFIS combining an HSI, RMI and color moving map display, priced to be affordable for any general aviation aircraft owner. Sandel's breakthrough technology employs an innovative miniature LCD projector to display information from a wide variety of instruments and remote data sources, selected with a set of easily accessed buttons surrounding the display. It fits conveniently into the main panel of almost any aircraft, and can be used to legally replace a required DG or HSI. The ColorMap HSI gets its heading data from a flux gate or DG, and nav data from a VOR, GPS, Loran, ADF, RMI, DME or marker beacon. It can also display data from a remote Stormscope. I've always wanted a product like this, why haven't I seen this before? Until the invention of the SN3308 only instruments in four-inch cases have been able to produce three-inch screen images. This has ruled them out for use in the majority of GA airplanes because of space. Although all the major avionics manufacturers have at one time considered a product like the SN3308, it has always been considered an impossibility to build a practical display inside a three-inch case. How does it work? Sandel invented an innovative LCD-based “rear-screen” color projector which uses the projection screen surface as the front panel of the SN3308 – the design is patent pending. It can put image pixels right to the edge of the sheet metal bezel, providing a nine square inch display image in a three-inch square case. This design is what makes a large image area possible. Is the display readable in direct sunlight? Yes. What feeds the SN3308 display? Display information is fed from a wide variety of instruments and remote data sources, selected with a set of easily accessed buttons surrounding the display. The SN3308 gets its heading data from a flux gate or DG, and nav data from a VOR, GPS, Loran, ADF, DME or marker beacon. It can also display data from a remote Stormscope (WX-500 only). Is the SN3308 a GPS? No. The SN3308 receives data from a panel-mounted Loran or GPS. Is it a complete "compass system"? No. The SN3308 requires an external fluxgate compass and remote gyro, just like most mechanical HSI’s. The combination of these devices with the SN3308 forms a slaved compass system. Was the SN3308 designed as an HSI or a moving map display? The SN3308 is designed as a multi-purpose navigation display. An HSI presentation has proven to be an excellent way to visualize course intercepts, and a moving map is ideal for overall situational awareness. Combining them into a single display provides the best of both worlds. Why does the SN3308 show the Marker Beacon and GPS annunciators? Bringing key pieces of navigation information to one place was a major design goal of the SN3308. It improves the pilot’s visual scan and improves safety. What are the SN3308 Bearing Pointers (RMI)? A bearing pointer sits on the outside of the compass rose and can be selected to any navigation radio in the aircraft, including the GPS. The Bearing Pointer always points directly to the navigation source and gives a pictorial view of where the station/waypoint is located no matter what your heading. Are the SN3308 bearing pointers different from my free-standing RMI? The SN3308 provides two independent bearing pointers which can be connected to VOR, ADF, or long-range nav (GPS or Loran) inputs. Most external RMI’s are restricted to VOR or ADF only. The SN3308 pointers are much more functional than an external RMI because the pointers are superimposed on the primary display, showing pictorial station location and passage at all times. Why is this feature important? A superimposed bearing pointer is one of the most useful tools in the cockpit. For instance, if you are flying an ILS, a bearing pointer can be selected to point to the LOM tuned by the ADF receiver. It will stay lined up with the course pointer when you are on course and rotate 180 degrees at station passage. Or, the GPS can be selected on the pointer which will sequence the pointer to each point in the approach including the destination airport. What other information is available from the BRG POINTER feature? The SN3308 displays the digital bearing TO each selected bearing source and distance in nautical miles. Does the SN3308 have a Glideslope display? Yes. When an ILS is tuned on the NAV receiver, the Glideslope Pointer is added to the display. This appears on the right side of the display and also as a cross-pointer in the display center when the 360° view is selected. What are the DME capabilities? The SN3308 shows distance-to for NAV sources from the DME or GPS sources from the GPS serial data. This information shows in the primary (upper left) area if the selected receiver is the primary navigation source, and/or in the bearing-pointer areas at the lower left or right. What DME's are compatible? The SN3308 will display DME data from KN63, KN62/64, DME-451 and other DME’s. With software version 1.33, support has been added to accept ARINC-568 data from DME’s such as the Collins DME-40. The Narco DME receivers are not compatible. I have a King KN63 DME. Must I keep my KDI572 indicator? Yes. The KDI572 is more than an indicator – it performs the master channeling and timing functions for the DME system and must be retained. Can I connect a DME with dual Garmin GNS430s? Note that the SN3308 uses the same ports for both ARINC 429 and King serial digital DME data. With a single GNS430 connected, one input port remains available on the SN3308 for a DME input. With dual GNS430s both connected as primary nav sources, a digital DME such as the KN62 or KN63 cannot be interfaced. An older analog-style DME may still be interfaced in this situation, however. What does the MAP function do? The SN3308 map displays waypoints supplied from your GPS receiver flight plan data. The SN3308 will also display airports, runway diagrams, VORs, NDBs, intersections and special-use airspace from its own internal Jeppesen database. In addition, the SN3308 will overlay BFG WX-500 Stormscope data on the map data. What happens in VOR Mode? When turned on, the map data is overlaid on the display regardless of which nav source is selected. As long as position data is being received from an LNAV (GPS or Loran) receiver, the map can be displayed. Does the SN3308 have an internal database? An internal database has been
available since mid-November 1999. This is a Jeppesen database, and
allows the display of nearby airports, navaids, and intersections
regardless of the type of LNAV receiver used. The map also displays
special-use airspace (Class B & C, MOAs, Restricted, Prohibited, and
Warning). Does the SN3308 show highways and rivers? No. The GPS waypoint data shows only flight plan waypoints. The internal Jeppesen database only includes standard navigation data such as airports, navaids, and airspace features. It does not include ground-mapping data. Is an International Database available? Yes. There are currently two database variants: ALL_AMERICAS which covers North and South America, Australia and New Zealand, and EUR_ASIA which covers the entire world EXCEPT for North and South America. How is the database installed? The database is uploaded from a PC through one of the SN3308 serial ports through a jack located on your aircraft panel. How often are updates required for the Internal Database? There is no requirement for updates, since the map display is not used for primary navigation. They are available on the normal Jeppesen 28-day cycle through our Web site. Note that flight plan waypoints displayed from your IFR certified GPS receiver are downloaded from the receiver and are always current. Is the Garmin GNS 430 compatible? Yes. Sandel and Garmin have worked together to create an extremely simple interconnect scheme using the ARINC 429 digital data bus. A single GNS 430 interfaces to an SN3308 with a total of only four wires! (A dual GNS 430 configuration may require a small relay, but is still an extremely simple interface.) All VOR, ILS, GPS and map data, as well as annunciators, flags and switching commands are handled via the ARINC 429 bus. Both the GNS 430 and the SN3308 require updated versions of software to support this interconnect. The SN3308 must be at hardware revision MOD 1 or later and software revision V1.30 or later. All SN3308s delivered after mid-March 1999 are at these revision levels. Older units will be upgraded free of charge but must be returned to the factory for the MOD1 upgrade. Contact Sandel at 760-727-4900 for details. With the ARINC 429 interface, nav source selection can be made from either the SN3308 or the GNS 430. Pressing the NAV button on the SN3308 will command the GNS 430 to switch between VOR/LOC and GPS. Likewise, pressing the CDI button on the GNS 430 will change the nav display on the SN3308. The map presentation on the SN3308 will include waypoints sent from the GNS 430. It will NOT include topographic features such as roads, water or railroads. A complete description of the SN3308 / GNS430 interface is also available. Note that the SN3308 uses the same ports for both ARINC 429 and King serial digital DME data. With a single GNS430 connected, one input port remains available on the SN3308 for a DME input. With dual GNS430s both connected as primary nav sources, a digital DME such as the KN62 or KN63 cannot be interfaced. An older analog-style DME may still be interfaced in this situation, however. Does the SN3308 work better with any one GPS System (ie. KLN 89, II Morrow, or Garmin 155)? The SN3308 works well with all of these units. When using an ARINC 429-capable receiver such as the Garmin 155 or KLN-90B, these units send out data on nearby waypoints in addition to flight-plan waypoints. Will it work with the Apollo GX60? Yes. The entire Apollo GX-series line is compatible. Does it work with the Northstar M-3? Yes. Northstar support was added in Version 1.12 of the software, released 1/2/99. The latest version of software is always available for downloading from this site. Is the Garmin 195 with RS 232 output compatible? No. At the present time, the SN3308 does not accept NMEA data from any handheld GPS receivers. Does it serve as remote annunciator panel for a GPS receiver? Yes, the SN3308 displays all the required annunciators for most models of GPS receivers. It also provides the remote switch inputs required for some models of IFR GPS, such as APPR ARM and OBS/LEG. Can the SN3308 replace the GPS annunciator? Yes, the SN3308 can replace the annunciator/switch panel used in GPS installations. It can also control the nav source selection relays commonly used in these setups. Will the GPS automatically drive the course pointer? Yes, this feature is called "auto-slew". When enabled, it causes the HSI course pointer to automatically rotate to the current desired track being sent by the GPS. This eliminates the messages from the GPS saying "turn course pointer to xxx" at each new wayoint. The auto-slew feature is available from any long-range nav receiver (loran or GPS) currently supported by the SN3308. Will it work with a KCS-55 compass system? Yes. The SN3308 works with the KMT112 fluxgate and the KG102 gyro. It can replace the KI-525a indicator, or the KI-525 indicator can be retained and the SN3308 can be slaved to it. What kind of remote DG's can be used with the SN3308? The SN3308 has been successfully interfaced with Collins, King, Bendix, Honeywell, S-TEC, Mid-Continent and Aeronetics remote DG’s. Also, the SN3308 can accept magnetic heading information in ARINC 429 low-speed format. Can a panel-mount DG be used to drive the SN3308? A self-slaved panel-mount DG can be used as a source as long as it has a bootstrap output to drive the SN3308. A non-slaved panel mount DG (such as Sigma-Tek) with a bootstrap can be used but only as an unslaved system, where a flux gate will not be used. Can the gyro be vacuum-driven? Yes. A slaved vacuum DG or remote gyro with a bootstrap output can be used. Is it compatible with STEC Autopilot 55 or 65? Yes. It is compatible with most known autopilots. What autopilots are compatible? Any autopilot which can interface with a KI-525 indicator or Synchro type indicator such as a Collins PN101, Bendix IN831, etc. should be compatible. This includes King, STEC and Century autopilots. Does it work with a Century 3 autopilot? Yes, with the addition of several small isolation transformers installed between the 1C388 radio coupler and the SN3308. These transformers are available from electronics supply houses for a total cost of about $10. Please see the installation documentation for details. Does it work with a Century-IV autopilot? Yes, with either the DC or 5KHZ AC version. How does autopilot take information from the SN3308? The SN3308 provides course and heading datum signals to the HSI. The OBS knob and HDG knob work with the autopilot in the same way as with a conventional HSI. Can it interface with the Collins Proline or the King Gold Crown? Yes, both the Collins VIR-30A and the ARINC 568 DME used in the Gold Crown line are supported as of software version 1.33, which was released on 5/19/99. Will the KNS 80 show
waypoints or VOR only? The SN3308 will receive standard VOR signals from a KNS80. However, the KNS80 does not provide data on RNAV waypoints when it is used in RNAV mode. Also, the KNS80 does not provide DME data in either VOR or RNAV mode so DME data will not be displayed. Does the SN3308 need a Nav converter between it and the NAV receiver? The SN3308 uses composite nav signals only for the RMI bearing pointers. A nav converter such as a King KN72, Century 1C707, or a nav receiver with a built-in converter such as the KX-165 is needed to generate the left-right deviation signal for the VOR and Localizer. Will it work with a Stormscope? The SN3308 displays lightning data from the WX-500 Stormscope remote sensor ONLY. It does not interface to a WX-1000, 1000+ or 950. It also does not interface to earlier Stormscopes like the WX-8 or WX-10. Will it work with a Strikefinder? No. The Insight Strikefinder contains its own display and does not provide a serial data output. Does the SN3308 work with Radar? No, there are no radar interfaces available. Does my installation require a Nav switching relay? Yes, this relay is used to switch the L-R and Flag signals to both the SN3308 display and the autopilot. If no autopilot is used a switching relay may not be required. My GPS requires a resolver, does this require a switching relay? If your GPS receiver uses ARINC-429, then you will not have to switch the resolver signals – the course data is transmitted digitally. Check with your dealer/installer. The KI-525 is a non-standard cutout size. How does the SN3308 install in this hole? Sandel can supply a KI-525 Bezel Adapter which is used when the SN3308 is replacing an existing KI-525. The KI-525 is slightly larger than the standard ARINC cutout and has mounting screws which do not line up with the standard hole pattern. The Bezel Adapter covers the excess area and provides a neat, finished appearance. How often is the projection lamp replaced? The projection lamp must be changed annually or after 225 hours of use. The lamp can be replaced by any avionics technician. Replacing Existing Instruments Can I replace my existing HSI with the SN 3308? Yes. Your installer can adapt the existing HSI wiring to the SN3308 and add additional wiring for the unique functions of the SN3308 such as GPS interface, marker beacons, ADF, or Stormscope. Can the SN3308 be used as a replacement for the King KCS 55? Yes. It works with the KMT112 fluxgate and the KG102 gyro. It can replace the KI-525 indicator. Is the SN3308 electric? The SN3308 is electric. The remote gyro connected to it may be vacuum, pressure, or electric. I do not have an HSI. What do I need to have to install a SN3308? You would need to install a remote DG and fluxgate. Can we replace an existing KPI 553 or other four-inch instrument? Yes. Physically, the KPI-553 is four inches and the SN3308 is three inches. The SN3308 can be mounted using an installer-fabricated cosmetic mounting plate. FAA Approvals and Certifications Is the SN3308 TSO'd? Yes. It is certified to TSO-C113, “Airborne Multipurpose Electronic Displays” and is approved as a PRIMARY display. What STC's are available? Sandel Avionics has received an FAA supplemental type certificate (STC) approval for the SN3308 installed in a Beech F33A Bonanza. This STC is the certification basis not only for Bonanzas but also for follow-on installations in other aircraft. The FAA Flight Standards Office has issued a memorandum which specifically states that the SN3308 is eligible for field approval without the need for an airframe-specific STC. What environmental standards does the SN3308 meet? The SN3308 meets or exceeds all applicable RTCA/DO-160C requirements for such environmental factors as temperature, shock, humidity, vibration, lightning and RF fields. |
|
|