QHYCCD COLDMOS QHY163M, Руководство пользователя

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QHY163M
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maximum value, and you should gradually turn up the “Cooler Power” value. When you turn off the
power,
if the “Cooler Power” value is very big, you should gradually turn it down before turn off the
power.
10. The FPS of cameras sometimes suddenly drops to zero under DDR mode on SharpCap,
what’s the solution for this problem?
Recently, we have been told by our users that the FPS of their cameras sometimes suddenly drops
to zero under DDR mode on SharpCap. It is caused by the fact that the receiving speed of computer
is relatively slower than the sending speed of camera. Once CMOS sensor starts working, it will
incessantly conduct exposure and output image data over and over again, and it cannot be
interrupted. If USB transmission was interrupted too often by the operating system, the data overflow
of DDR would ensue resulting in bad frame. Therefore, not a single frame is a complete frame, and
the FPS will drop to zero.
Solutions:
The first solution to this problem is to increase the value of USB traffic to decrease the FPS of the
cameras. Note that by using previous version of SharpCap Patch, the value of USB traffic cannot be
set to a value large enough, so you should go to our website to download the latest version of
SharpCap Patch.
The second solution to this problem is to turn off the DDR mode, but for computers whose
performance isn’t very good, this solution may not work very well.
11. How to reduce the amplifier glow of QHY163M?
Some users say there is amplifier glow on their images shot by using MaxIm. Part of the glow is
produced during the readout process of CMOS, so by turning down the USB traffic value, we can
increase the transfer speed of images, decrease the readout time so that the glow can be reduced.
We have run two tests to show how turning down the USB traffic value can reduce the amplifier glow.
For more information about it, please check the document
“How to reduce the amplifier glow of
QHY163M” on the webpage of QHY163M.
12. Can QHY163M still work when the temperature is thirty degree below zero Celsius (-22
℉
)?
Yes, we test it in the temperature of thirty five degree below zero Celsius (-31
℉
), and it still works very
well.
13.
There’s a dark banding on the top of the image. How should I avoid it?
For QHY163 ASCOM or EZCAP_QT Capture, you sometimes will find a dark banding appear if you
capture first frame then wait some time and capture again. This will happen when the exposure time
is very short.
This is due to the Optic Black Calibration Circuit in the sensor.