FAQ’s

What do you need to know before ordering a Liteye product?

First and foremost, understand your applications requirements. Are you using a computer or a camera? Stated differently what your signal source is. A camera will output composite video, either PAL or NTSC and a computer will output analog RGB. These are the only signals that Liteye products accept natively To further clarify the signal type and the restraints , analog RGB can only be a resolution of 800X600 or 640X480 and the composite video is either CCIR (monochrome PAL) or RS170 (monochrome NTSC). Most color composite video will simply be converted to monochrome. It is rare that a sync problem will be seen.

The driver electronics are not auto sensing for the type of signal input (they are not “plug and play”). Some user interaction must occur to tell the electronics the type of signal being used. For instance, the user may have to push a button or change cable type used; simply changing the signal input will not reconfigure the electronics to accept a change in signal type. These and other configurations are determined by the firmware build loaded onto the driver electronics.

It is important that you discuss your application carefully with a Liteye sales representative before making your final decision on a firmware configuration.

Liteye products also come in two main varieties. The first is a direct view configuration like the view finder of a video camera. You see a picture but you are not actually looking through the camera. You are simply looking at a display that is showing some image on it.

The other configuration is like an SLR camera. When you look through the view finder you are actually looking through the lens. You may see information displayed such as battery life remaining or shutter speed, but this information is displayed over the real world. These our like our “see through” optic products.

One other consideration is your power source. Liteye products natively accept 4.5vDC to 6.5vDC. This will cover USB power to 4 Double AAs. To use higher power source than this, a power a regulator will have to be used to keep the voltage within acceptable limits.

As stated earlier, these and other configurations are determined by the firmware build, optical configuration and other available accessories chosen at the time of purchase . It is important that you discuss your application carefully.

What video format do Liteye product support?

  • Analog VGA 640 x 480 @ 60, 72, 75 & 85 Hz non-interlaced
  • Analog SVGA 800 x600 @ 60, 72, 75 & 85 Hz non-interlaced
  • Interlaced 480 active lines (240 per field), timing and levels per SMPTE-170M
  • Interlaced 600 active lines (300 per field), levels per SMPTE-170M

What type of user input capabilities via custom firmware?

  • Luminance control
  • Red / Green / Blue brightness control (good for hue matching)
  • Contrast control
  • Image orientation adjustment
  • 180 degree rotation
  • mirroring along X or Y axes
  • Manual video input adjustment
  • NTSC to PAL, vice versa
  • VGA to SVGA, vice versa
  • VESA frequency (60, 72, 75 & 85)
  • Screensaver (pixel shift)
  • LED indicator

What is the Pixel Quality Specification of Liteye products?

STUCK OFF SUB-PIXELS:

  • SVGA+ : <120
  • SXGA :  < 310

No more than one sub pixel out per pixel (Touching sub-pixels in RGB order within row.) No more than 2 adjacent sub pixels out.

Standard XL Display – Our standard for microdisplay pixel defects is less than 144 sub-pixels defects (off) per panel, or 0.01% of the total amount of sub pixels in the SVGA+ display.

STUCK ON SUB PIXELS XL – NONE ALLOWED

BLACK SPOT– NONE ALLOWED

What is the Mean Time Between Failure of the OLED display?

Most Liteye products utilize a OLED display and it is the display with the shortest MTF, therefore we usually refer to the display when classifying our products.

The following is a standard statement regarding MTTF (Mean Time To Failure). Since microdisplays that fail are irreparable, a MTTF is used instead of MTBF (Mean Time Between Failure).

Each display can be considered to have two major components: the carrier PCB and the OLED. The MTTF (Mean Time To Failure) of the carrier PCB and its components are standard for electrical components, more than a million hours. On the other hand, the MTTF of the OLED has been evaluated to be approximately 200,000 hours. To achieve this value two sets of 32 displays were operated at 85°C and 85%RH until all failed. The cumulative number of failures is used in conjunction with activation energy and acceleration factor in order to evaluate the failure rate at room temperature, and from there the MTTF.

What are the assembly standards for Liteye products?

Most all Liteye controller boards and cable assemblies are compliant with the “Restriction of Hazardous Substances Directive” (RoHS) Initiative 2002/95/EC.

Most all Liteye controller boards and cable assemblies are compliant with the “Acceptability of Electronic Assemblies” ANSI/IPC A-610B.

Where applicable, Liteye products conform to the IEC Ingress Protection rating of IP67 (dust-tight, protection against temporary immersion) or IP68 (dust-tight, protection against complete continuous submersion in water up to 1 meter deep for 15 minutes)

Please check with your sales represententive for actuall specifications

How do you return product to Liteye for credit?

Liteye Systems, Inc. has a 15 day return policy on all HMDs. If for any reason you wish to return your HMD during those first 15 days please call our tech support line at 720-974-1766, Monday through Friday, 8AM to 5PM MST. Obtain an RMA, (Return Merchandise Authorization), number. This RMA number must be clearly printed on the outside of the shipping box. Failure to place RMA number on your box may result in your box being returned to you. All returns during this 15 day period will be subject to a 15% restocking fee. Your refund will be issued minus restocking fee and any shipping charges.

Liteye OEM Products have a limited warranty. please ask your sales rep for details.

What type of EMI testing is standard for Liteye products?

Requirement
EN 61000-6-2: 2001, Part 6-2: Generic Standard – Immunity for Industrial Environment

Specification
Electrostatic Discharge
Radiated RF Immunity
Electrical Fast Transient/Burst
Surge Immunity
Conducted RF Immunity
Power Frequency H-field
Immunity
Voltage Dips. Interrupts

Test Method
IEC 61000-4-2: 2001-04
IEC 61000-4-3: 2006-02
IEC 61000-4-4: 2004-07
IEC 61000-4-5: 2005-11
IEC 61000-4-6: 2006-05
IEC 61000-4-8: 2001-03
IEC 61000-4-11: 2004-03

How do you return product to Liteye for repair?

Please contact your sales representative and ask for an RMA number, provide him or her with the any required information.
Then if authorized, return the product to:

Liteye Systems
RMA# xxxxxat
7060 S. Tucson Way
Centennial, CO. 80112.

Once Liteye Systems has received your RMA, Liteye Systems will do an initial trouble shooting assessment. All units (warranty or not) will receive this assessment. This first diagnoses is a $75.00 per hour charge. Once tech. support finishes with its assessment Liteye Systems will contact via email with the repair report.

Once you authorize Liteye Systems to make the necessary repairs, Liteye Systems will send you information about payment of the repair. All repairs will be completed after Liteye Systems receives all payments for the repair.

If your repair is not under warranty and Liteye Systems does not receive payment within 30 days of the repair, the unit(s) will be returned as is, at original shipper’s expense. Liteye Systems will also return any RMA that is not authorized to be repaired or if Liteye Systems receives no information regarding the repairs within the 30 days, at original shipper’s expense.

Typical fix and return is 15 days from the day that Liteye Systems receives and checks in the RMA. If an HMD is returned with out an RMA number Liteye Systems will not start any work on the returned HMD and it will be returned to the shipper at their expense.

Liteye OEM Products have a limited warranty. please ask your sales rep for details.

What are the brightness characteristics of the OLED display?

Display Part Number Display Type Typical Maximum
EMA-100310-01 color 150 cd/m2 300 cd/m2
EMA-100311-01 monochrome green 1500 cd/m2 3000 cd/m2
EMA-100309-01 monochrome white 900 cd/m2 1800 cd/m2

 

How is power measured on Liteye's product?

The objective is to test to find the a correlation between level of pixels intensity and power consumed by the HMD with a set luminance level. The luminace adjustment is divided into 256 steps. The plus/minus buttons on our units simply increment and decrement the luninace level. This of course can be altered to fit the customer’s needs though. In the test, it is set to a nominal level towards the middle of the scale.

Concerning the radar, why choose one antenna horn over the other?

It has to do with application ;
W20s – 20o Wide Beam Elevation. Suitable for hilly terrain where the Wide Beam allows detection into valleys and up mountain sides in one scan. However, the wider beam does reduce the detection ranges maximum man detection out to 7.4km. Also a useful antenna for detecting low flying aircraft, UAV etc. Least expensive if cost is an issue and also the lightest weight if load bearing is of concern (i.e. vehicle mount).

M10s – 10o Beam Elevation. These are our standard go to Antenna Horns and give the best performance over all terrains. They will work well in hilly terrain and in Desert environments with a maximum man detection range of 10.3km. Better for very wet regions (illuminate less rain) and for busy installation sites such as Oil and Gas facilities, Airports etc.

N5s – Narrow 5o Beam Elevation. Very rarely offer these Antenna Horns because they are so large (heavy) and expensive. These were designed specifically for the IFT requirement of having an extended range option for the radar. Man detection is out to 15km with this antenna but it would need to be a be a perfectly flat desert environment to get anywhere near that range.

What is FWCM radar?

FMCW is the technique by which the radar resolves and measures targets in range. As FMCW uses a continuous transmission, it measures targets at all ranges within the range gate. In practice, FMCW radars can detect targets at effectively zero range and at maximum instrumented range simultaneously. In the case of Blighter radars, they can detect targets as close as 10 metres from the front of the radar antenna, out to whichever instrumented range mode is used (e.g. 2 km, 5 km, 8 km, 16 km or 32 km).

Traditional pulsed or pulse compression radars have a dead-zone at short-range that can only be filled by time-consuming secondary short-range scans.

Why is power efficiency gained with FWCM radar?

Another advantage of FMCW technology is that it achieves much greater power efficiency than pulse based radars. Modern solid-state transmitters are more efficient when operated continuously, rather than in pulses. The benefits of this are that the radar requires less input power and that the transmitter components are subject to much less thermal stress than in pulsed systems, thereby improving reliability and tolerance of hot desert climatic conditions. The low power consumption of Blighter radars (just 38 Watts for a 360° long-range solution) reduces the system power requirements and makes it possible for standalone operation from one or two solar panels, combined with a deep cycle battery.

It should be noted that a number of competing e-scan radars generate so much heat that they require air conditioning to operate in extreme temperatures (thereby demanding even greater power). Blighter radars require no such additional cooling.

What is the RMA process for your radar system?

Radar RMA Process (North America)
Please contact the Blighter Radar RMA Administrator providing details of the faulty equipment and the fault symptoms in as much detail as possible.

The RMA Administrator will process the RMA request and email it back to you with an RMA number, along with packing, shipping and any other instructions.

If the warranty has expired on your product or if it has been physically damaged, the RMA Administrator will advise you of the cost of inspection/repair and the process for submitting a purchase order to pay for the work.

For display prodcuts see How do you return product to Liteye for repair above in the FAQ page

What is a Nuisance Alarms when using Radar?

Nuisance alarms are caused by the radar detecting the movement of objects that are not of interest to the operator. Such targets can include wind blown trees, bushes and grass as well as man-made objects such as sign posts, fences and other objects that can move in the wind, and even air-conditioning fans. These wind blown objects are often characterized as having very low positive and negative velocities on consecutive scans without actually moving anywhere and often are small in Radar Cross Sectional (RCS) area.

There are a number of facilities available within the Blighter radar to help manage and reduce nuisance alarms. Firstly, the allowable target size can be set within the radar. Wind blown nuisance alarms are often small, so increasing the Blighter radar’s minimum target detection size will help to ignore and therefore filter out these unwanted targets. Additionally the minimum detection velocity of the Blighter radar can be fine tuned to ignore the very slow movement of the wind blown targets. These changes may reduce the radar’s ability to detect very small and slow targets such as crawling humans, but the operator will be presented with a clearer picture and the ability to detect the target once they start walking or are away from the wind blown vegetation. In addition to these bulk radar settings, it is also possible for the User HMI (Human Machine Interface) to filter the Blighter radar targets based on target size and velocity, allowing user defined zones to adapt the sensitivity of the radar to nuisance alarms on an area by area basis. For example this allows the user to desensitise the Blighter Radar and HMI system around groups of trees, preventing nuisance alarms on the wind blown trees but allowing full sensitivity operation elsewhere.

What is the coverage of a B422 Radar?

Blighter B422 is a continuous scan of 180° with less than 1 second target detection, across the whole 180°. We scan from the base of the radar outwards without moving, allowing for short and long distance coverage all the time. We cover not only the water, but also the land, letting us detect and track targets as they move from water to shore, to inland, as well as track low flying aircraft/UAV’s. B422 is able to track, simultaneously, up to 1000 targets regardless of where they are located in our field of view.

What is the power draw of the B422?

Blighter B422 pulls only 40w and does not need to be cooled allowing it to operate in extremely hot environments. Very low heat signature.

What is MTBF of the blighter Radar?

Blighter B422 has no moving parts and has an MTBF of +65,000 Hrs.

Is the Blighter B402 marine compliant?

Blighter B422 is 100% marine compliant. Plus it has no moving parts that can allow the salt to enter in the marine environmentv.

What is MTBF of the blighter Radar3?

Blighter B422 has no moving parts and has an MTBF of +65,000 Hrs.

What is the operating frequency of the Blighter Radar?

Blighter B422 operates in the KU-band for more accuracy. They may try to tell the customer that this means we have problems with rain, but we do not, Blighter utilizes a patented rain filter and we are not affected. B422 technology views 94 channels out and 94 channels in, which enables high accuracy and extremely low false alarm rates, less than 1 false alarm per 24 hours. This radar monitors water, land, air within the field of view simultaneously.

What is the detection characteristics of the Blighter Radar?

Blighter B422 detects and tracks up to 1000 targets on water, land, air simultaneously. On land we can detect something as small as a sniper moving his head, marking that spot, and then tracking that target even if he freezes in place or goes behind a building. Because we are looking at the whole 180° we don’t have to worry about missing or losing a target. The B422 can detect and track objects moving at speeds up to Mach1. Allowing us to detect and track low flying jets, helicopters, UAV’s, etc…Over water Blighter has patented wave compensation ability in its software, allowing the end-user to adjust for different wave heights, allowing easier detection of small craft in heavy seas.

What type of deployments has Blighter experienced?

Blighter B422 has been deployed since 2009 in Afghanistan and other sites, with zero failures or down time. Has been monitoring the Korean DMZ, both land and sea, since 2010, again with zero failures or down time. Numerous other sites both land and sea around the world, all still in operation and no down times.