Activity
From 12/24/2014 to 01/22/2015
01/19/2015
- KM 03:38 PM Support: RE: top and bottom half sensor temp
- Ok great thanks! Just wanted to double check.
- MW 03:16 PM Support: RE: top and bottom half sensor temp
- Hi Kyle,
This is why we use an external thermistor attached to the sensor for temperature reporting. We have observed quite a bit of variance in the VPTAT voltages from chip to chip wrt temperature.
Each half of the 2521 sensor re... - I have noticed that there is a big temp difference between the top and bottom half of the sensor.
Example:
Vptat_Top: 2.12863V : 35.3651C
Vptat_Bot: 2.16838V : 44.065C
I took a look at the sensor with a thermal camera and di...
01/08/2015
- KM 10:41 AM Support: RE: High/Low gain mode using 8bpp-12bpp
- Mike, is there a similar bias in the 8bit and 12bit modes?
If so what is it?
Does 12bit pack into 11bits in those modes?
12/30/2014
- KM 01:11 PM Support: RE: High/Low gain mode issue using 16bpp
- Ah, ok well that explains it! No problem, just good to know what is happening.
Thanks.
Kyle - MW 12:50 PM Support: RE: High/Low gain mode issue using 16bpp
- There is a 20 count bias in the data. It's a bug in the mode you are using.
During calibrated high/low gain blending (normal operation), there is a 20 count bias added (digitally) to each of the channels prior to the blending.
T... - KM 12:38 PM Support: RE: High/Low gain mode issue using 16bpp
- I use MATLAB to look at and process the data. Knowing that the data is packed into the lower 11 helps answers my question.
Using only 11bits should produce a maximum pixel value of 2047 but I am getting pixel values that peak at 2067. ...
12/29/2014
- MW 08:04 AM Support: RE: High/Low gain mode issue using 16bpp
- Hi Kyle,
Are you using XCAP (the epix frame grabber) or MityViewer to look at the data?
When you switch to single channel, all of the data scaling is removed and the data is packed into the lower 11 bits of the 16 bit word.
Quit...