So, why some IIT’s are labeled as 4Gs and a few as ECHO’s?
At first – IIT is classed as a 4G provided that it exceeds mil-spec necessities. Each time throughout the testing course of the unit doesn’t meet these necessities it’s labeled as ECHO.
One might imagine that we solely discuss concerning the tube specs which might be proven on the datasheet. Sure, these attributes play some function in classifying the tube between 4G and ECHO, however the principle distinction is outdoors of proven specs.
Throughout testing tube goes by means of collection of environmental (e.g. survive -32 to +49C for seven days), electronics, sturdiness (unit is anticipated to final greater than 7000h) and different exams.
Which means – If it is advisable to have excessive diploma of certainty that your unit will work in any environments, situations and won’t fail you in worst moments, you go to 4G. That´s what mil-spec is for.
Along with efficiently finishing extra rigorous testing 4G typically has:
- Much less black spots and shadows
- 15% larger achieve and sensitivity (not seen in specification) that are the principle attributes for gentle amplification
- Longer lifespan (at the least 7000h, ECHO doesn’t have lifespan outlined)
- Wider spectral vary to ship top quality picture in all environments
- Smaller halo across the brightest objects
- Larger minimal necessities for many of the attributes
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