Reading the CCD problem gone


Apr 23, 2008

 


----------------------------

#31958 Apr 23, 2008

My ST-10 XME has a 9 second download time but because there is a part

where Maxim DL is reading the CCD, the process takes almost 25 seconds

(15 to read and 10 to download) to complete from when it stops an image

and starts another.



So from what I have heard from others, no one seems to know why Maxim

Dl even does this.



Dean



----------------------------

#31997 Apr 27, 2008

Hi Dean,



Are you saving your files to a local disk or to a shared disk over a

wireless network. I have found that MaxIm will read the CCD quickly,

but may take a long time to actually save the files. If the disk is

local, the files will be saved instantaneously; but the farther away a

remote disk is, the longer it will take.



Hilary



--- In MaxImDL@yahoogroups.com, "Dean Salman" cluster@...> wrote:

>

> My ST-10 XME has a 9 second download time but because there is a part

> where Maxim DL is reading the CCD, the process takes almost 25

seconds

> (15 to read and 10 to download) to complete from when it stops an

image

> and starts another.

>

> So from what I have heard from others, no one seems to know why Maxim

> Dl even does this.

>

> Dean

>



----------------------------

#31998 Apr 28, 2008

No, just a local drive. Other programs take only 9 seconds and the

image is display. I am guess that some cameras need to be read into

some buffer and then downloaded and Maxim does not know it is an SBIG

camera so it just does the same for all cameras (who knows)



I really was just wondering why Maxim Dl did a read and then download

more than anything.



--- In MaxImDL@yahoogroups.com, "Hilary Jones" hilaryyahoo3@...>

wrote: >

> Hi Dean,

>

> Are you saving your files to a local disk or to a shared disk over

a > wireless network. I have found that MaxIm will read the CCD

quickly, > but may take a long time to actually save the files. If the disk

is > local, the files will be saved instantaneously; but the farther

away a > remote disk is, the longer it will take.

>

> Hilary

>

>

> --- In MaxImDL@yahoogroups.com, "Dean Salman" cluster@> wrote:

> >

> > My ST-10 XME has a 9 second download time but because there is a

part > > where Maxim DL is reading the CCD, the process takes almost 25

> seconds

> > (15 to read and 10 to download) to complete from when it stops an

> image

> > and starts another.

> >

> > So from what I have heard from others, no one seems to know why

Maxim > > Dl even does this.

> >

> > Dean

> >

>



----------------------------

#32001 Apr 28, 2008

Dean Salman wrote: >

> Done that already and it is not just this camera and this PC. I can

> tell you that reading the CCD is displayed for about 9 seconds and

> downloading is another 9 seconds. For some reason it only does this

> on the expose tab, not the focus tab. (all drivers are up to date)

> Can't tell if it is just 1x1 that is doing it or all bins since they

> are faster.



Bizarre.



I just tested it with an ST-2000XCM and a stopwatch. Got the exact same

download times on the Focus and Expose tabs, and in CCDOPS. I haven't seen any

other reports of this problem. It appears to be "just you".



Make sure you don't have an old sbigudrv.dll file in your MaxIm DL program

folder, or anywhere else in your search Path (except of course where SBIG puts it).



Perhaps it is something about your particular settings? Could you export the

Registry section for MaxIm CCD and send it to me? (zip please)



Doug



---------------



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



---------------



----------------------------

#32003 Apr 28, 2008

In a message dated 4/28/08 5:22:27 PM, dgeorge@... writes:



> It appears to be "just you".

>



Doug....no, not just Dean.



My STL-11000 started 'reading' a long time ago, can't remember just when, but

it didn't do it when I first got it; ie. Aug. 2005.



I have two friends who are experiencing the same thing.



Kent Kirkley





**************

Need a new ride? Check out the largest site for

U.S. used car listings at AOL Autos.



(autos.aol.com/used?NCID=aolcmp00300000002851)





[Non-text portions of this message have been removed]



----------------------------

#32005 Apr 28, 2008

glinos7124 wrote:

> Hi Doug:

>

> Can you give us a little more detail on this issue.

>

> Is it still necessary to do this with modern USB/ethernet/firewire

> cameras?

>

> Can responsible adults turn off this safety feature?



Why bother? It *only* affects the display on the screen. Period. It has

nothing to do with any extra delay.

> I've noticed that MaxIm always takes a few seconds longer

> to capture and display vs the vendor supplied program.

>

> In the kind of work that I do, those extra seconds DO add up

> during an evening run.



First of all, don't assume everyone is seeing the same thing. That can lead to

a lot of confusion.



With big images, the screen stretch calculations can take a little time. Try

turning on Fast Histogram in the Settings, and see if that makes any difference

for your system.



As for Dean's problem, I don't know where any sort of extra delay would be

coming from. We will have to investigate.



Perhaps someone with this problem could let us remote desktop onto your machine

for a test sometime?



Doug



---------------



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



---------------







----------------------------

#32008 Apr 29, 2008

Doug, I was doing some testing to see what I can help with on input.

The fact is the longer the exposure the worst it is. If I take a 10

second exposure, the reading CCD displays so fast I almost do not see

it. When I increase the exposure to 300 seonds, the reading CCD now

takes about 6 seconds and then the download. Maybe that is why I

though the focus was not doing this.



Hope that helps

Dean



--- In MaxImDL@yahoogroups.com, "Douglas B. George" dgeorge@...>

wrote: >

> Dean Salman wrote:

> >

> > Done that already and it is not just this camera and this PC. I

can > > tell you that reading the CCD is displayed for about 9 seconds

and > > downloading is another 9 seconds. For some reason it only does

this > > on the expose tab, not the focus tab. (all drivers are up to

date) > > Can't tell if it is just 1x1 that is doing it or all bins since

they > > are faster.

>

> Bizarre.

>

> I just tested it with an ST-2000XCM and a stopwatch. Got the exact

same > download times on the Focus and Expose tabs, and in CCDOPS. I

haven't seen any > other reports of this problem. It appears to be "just you".

>

> Make sure you don't have an old sbigudrv.dll file in your MaxIm DL

program > folder, or anywhere else in your search Path (except of course

where SBIG puts it). >

> Perhaps it is something about your particular settings? Could you

export the > Registry section for MaxIm CCD and send it to me? (zip please)

>

> Doug

>

---------------

>

> Doug George

> dgeorge@...

>

> Diffraction Limited

> Makers of Cyanogen Imaging Products

> www.cyanogen.com

>

> 100 Craig Henry Dr., Suite 202

> Ottawa, Ontario,

> Canada, K2G 5W3

>

> Phone: (613) 225-2732

> Fax: (613) 225-9688

>

---------------

>



----------------------------

#32009 Apr 29, 2008

That would seem consistent with the exposure timer in the camera and the

exposure timer in your computer running at slightly different rates. The

longer the exposure, the greater the absolute deviation between the two.



Chris



*****************************************

Chris L Peterson

Cloudbait Observatory

www.cloudbait.com



----- Original Message -----

From: "Dean Salman" cluster@...>

To: MaxImDL@yahoogroups.com>

Sent: Tuesday, April 29, 2008 1:01 AM

Subject: [MaxImDL] Re: Reading the CCD





> Doug, I was doing some testing to see what I can help with on input.

> The fact is the longer the exposure the worst it is. If I take a 10

> second exposure, the reading CCD displays so fast I almost do not see

> it. When I increase the exposure to 300 seonds, the reading CCD now

> takes about 6 seconds and then the download. Maybe that is why I

> though the focus was not doing this.

>

> Hope that helps

> Dean



----------------------------

#32010 Apr 29, 2008

Doug, the same thing happens with my STL11k, as soon as the exposure ends,

the Sequence tab displays about 20-25sec "Reading Camera" before Downloading

another 25sec...joe :)





"May You Go Among The Imperishable Stars"

Joe Mize www.cav-sfo.com

Chiefland Astronomy Village, Fla.

----- Original Message -----

From: "Douglas B. George" dgeorge@...>

To: MaxImDL@yahoogroups.com>

Sent: Monday, April 28, 2008 6:22 PM

Subject: Re: [MaxImDL] Re: Reading the CCD





> Dean Salman wrote:

>>

>> Done that already and it is not just this camera and this PC. I can

>> tell you that reading the CCD is displayed for about 9 seconds and

>> downloading is another 9 seconds. For some reason it only does this

>> on the expose tab, not the focus tab. (all drivers are up to date)

>> Can't tell if it is just 1x1 that is doing it or all bins since they

>> are faster.

>

> Bizarre.

>

> I just tested it with an ST-2000XCM and a stopwatch. Got the exact same

> download times on the Focus and Expose tabs, and in CCDOPS. I haven't

> seen any

> other reports of this problem. It appears to be "just you".

>

> Make sure you don't have an old sbigudrv.dll file in your MaxIm DL program

> folder, or anywhere else in your search Path (except of course where SBIG

> puts it).

>

> Perhaps it is something about your particular settings? Could you export

> the

> Registry section for MaxIm CCD and send it to me? (zip please)

>

> Doug

>

---------------

>

> Doug George

> dgeorge@...

>

> Diffraction Limited

> Makers of Cyanogen Imaging Products

> www.cyanogen.com

>

> 100 Craig Henry Dr., Suite 202

> Ottawa, Ontario,

> Canada, K2G 5W3

>

> Phone: (613) 225-2732

> Fax: (613) 225-9688

>

---------------

>

---------------

>

> Yahoo! Groups Links

>

>

>

>







----------------------------

#32011 Apr 29, 2008

Not sure if I follow you, would that be a software or hardware

issue. The reason I ask is because the 2 other software programs I

took a 5 minutes exposure with took only 9 seconds to display the

image after it was ended.



The other programs do not display reading CCD, but maybe it is all

part of the download process they do. I did suspect SBIG drivers at

one point which is why I tried the other software as well.



As someone posted before, this was not always the case and I almost

did not really notice until a friend was using a 6303 and complained

it took longer than what he expected. I told him are you sure

because it only took about 15 seconds when I was using one a couple

of years ago, his download is twice that and he does 20 min images.

Then I notice the ST-10 taking longer as well.



Again, this really does not affect me that much, what is 10 more

seconds. But if it is an issue, I thought they might want to know

about it. It is a non harmful issue, even with an STL-11000 and an

hour exposure, the time lost is not much. BUT they might want to fix

this someday if it is an issue with Maxim DL g>





Dean





--- In MaxImDL@yahoogroups.com, "Chris Peterson" cpeterson@...>

wrote: >

> That would seem consistent with the exposure timer in the camera

and the > exposure timer in your computer running at slightly different

rates. The > longer the exposure, the greater the absolute deviation between the

two. >

> Chris

>

> *****************************************

> Chris L Peterson

> Cloudbait Observatory

> www.cloudbait.com

>

>

> ----- Original Message -----

> From: "Dean Salman" cluster@...>

> To: MaxImDL@yahoogroups.com>

> Sent: Tuesday, April 29, 2008 1:01 AM

> Subject: [MaxImDL] Re: Reading the CCD

>

>

> > Doug, I was doing some testing to see what I can help with on

input. > > The fact is the longer the exposure the worst it is. If I take a

10 > > second exposure, the reading CCD displays so fast I almost do not

see > > it. When I increase the exposure to 300 seonds, the reading CCD

now > > takes about 6 seconds and then the download. Maybe that is why I

> > though the focus was not doing this.

> >

> > Hope that helps

> > Dean

>



----------------------------

#32012 Apr 29, 2008

Not sure if I follow you, would that be a software or hardware

> issue.



No idea. Seems like it could be either, or both. It sounded to me like

Maxim times the exposure, but so does the camera. If Maxim's counter

finishes first, it has to wait before the image can be downloaded. If

so, that may give the appearance of a longer download, but that's just

an illusion. The real test would be to compare the time from the start

of an exposure to the display of the image. That is, time the true sum

of exposure and download. If it's the same across different apps, it

just means that Maxim is reporting part of the exposure time as if it

were download time.



Chris



*****************************************

Chris L Peterson

Cloudbait Observatory

www.cloudbait.com



----- Original Message -----

From: "Dean Salman" cluster@...>

To: MaxImDL@yahoogroups.com>

Sent: Tuesday, April 29, 2008 7:53 AM

Subject: [MaxImDL] Re: Reading the CCD





> Not sure if I follow you, would that be a software or hardware

> issue. The reason I ask is because the 2 other software programs I

> took a 5 minutes exposure with took only 9 seconds to display the

> image after it was ended.

>

> The other programs do not display reading CCD, but maybe it is all

> part of the download process they do. I did suspect SBIG drivers at

> one point which is why I tried the other software as well.

>

> As someone posted before, this was not always the case and I almost

> did not really notice until a friend was using a 6303 and complained

> it took longer than what he expected. I told him are you sure

> because it only took about 15 seconds when I was using one a couple

> of years ago, his download is twice that and he does 20 min images.

> Then I notice the ST-10 taking longer as well.

>

> Again, this really does not affect me that much, what is 10 more

> seconds. But if it is an issue, I thought they might want to know

> about it. It is a non harmful issue, even with an STL-11000 and an

> hour exposure, the time lost is not much. BUT they might want to fix

> this someday if it is an issue with Maxim DL g>

>

>

> Dean



----------------------------

#32014 Apr 29, 2008

To throw another couple bits of info into this discussion.



In the Sequence Tab, when the countdown timer reaches the desired exposure

time and "Reading Camera" is displayed the Guider Tracking Log shows guiding

exposures still occurring until "Downloading Image" appears. Only then

does the Mouse cursor become an hourglass.



I don't know if Guider corrections are actually being applied during this

time, but often I see the guide star starting to drift. I've never

inspected the Tracking Log to confirm whether Corrections are being applied.



I've always thought "Reading Camera" to be a feature of the SBIG Drivers.

HTH...joe :)





"May You Go Among The Imperishable Stars"

Joe Mize www.cav-sfo.com

Chiefland Astronomy Village, Fla.

----- Original Message -----

From: "Chris Peterson" cpeterson@...>

To: MaxImDL@yahoogroups.com>

Sent: Tuesday, April 29, 2008 10:04 AM

Subject: Re: [MaxImDL] Re: Reading the CCD





>> Not sure if I follow you, would that be a software or hardware

>> issue.

>

> No idea. Seems like it could be either, or both. It sounded to me like

> Maxim times the exposure, but so does the camera. If Maxim's counter

> finishes first, it has to wait before the image can be downloaded. If

> so, that may give the appearance of a longer download, but that's just

> an illusion. The real test would be to compare the time from the start

> of an exposure to the display of the image. That is, time the true sum

> of exposure and download. If it's the same across different apps, it

> just means that Maxim is reporting part of the exposure time as if it

> were download time.

>

> Chris

>

> *****************************************

> Chris L Peterson

> Cloudbait Observatory

> www.cloudbait.com

>

>

> ----- Original Message -----

> From: "Dean Salman" cluster@...>

> To: MaxImDL@yahoogroups.com>

> Sent: Tuesday, April 29, 2008 7:53 AM

> Subject: [MaxImDL] Re: Reading the CCD

>

>

>> Not sure if I follow you, would that be a software or hardware

>> issue. The reason I ask is because the 2 other software programs I

>> took a 5 minutes exposure with took only 9 seconds to display the

>> image after it was ended.

>>

>> The other programs do not display reading CCD, but maybe it is all

>> part of the download process they do. I did suspect SBIG drivers at

>> one point which is why I tried the other software as well.

>>

>> As someone posted before, this was not always the case and I almost

>> did not really notice until a friend was using a 6303 and complained

>> it took longer than what he expected. I told him are you sure

>> because it only took about 15 seconds when I was using one a couple

>> of years ago, his download is twice that and he does 20 min images.

>> Then I notice the ST-10 taking longer as well.

>>

>> Again, this really does not affect me that much, what is 10 more

>> seconds. But if it is an issue, I thought they might want to know

>> about it. It is a non harmful issue, even with an STL-11000 and an

>> hour exposure, the time lost is not much. BUT they might want to fix

>> this someday if it is an issue with Maxim DL g>

>>

>>

>> Dean

>

>

---------------

>

> Yahoo! Groups Links

>

>

>

>







----------------------------

#32015 Apr 29, 2008

Dean Salman wrote: >

> Doug, I was doing some testing to see what I can help with on input.

> The fact is the longer the exposure the worst it is. If I take a 10

> second exposure, the reading CCD displays so fast I almost do not see

> it. When I increase the exposure to 300 seonds, the reading CCD now

> takes about 6 seconds and then the download. Maybe that is why I

> though the focus was not doing this.

>

> Hope that helps



Indeed. This suggests that there is a discrepancy between the CPU clock and the

camera clock. Either the camera's exposure timer is running slow or the CPU

clock is running fast.



Here's the sequence of events, assuming the camera runs 1.66% slow:



1. You start a 300 second exposure



2. 300 seconds pass, MaxIm DL automatically switches the display to "Reading"



3. The camera continues exposing for another 6 seconds



4. The camera finishes its 306 second exposure and signals MaxIm DL that it is

ready to read out



5. MaxIm DL downloads the camera



If this is the case, your camera needs service.



Second case, assuming the CPU clock runs 1.66% fast:



1. You start a 300 second exposure



2. 294 seconds pass, and MaxIm DL thinks 300 seconds has passed because the CPU

clock is running fast. It switches the display to "Reading"



3. The camera continues exposing for another 6 seconds



4. The camera finishes its 300 second exposure and signals MaxIm DL that it is

ready to read out



5. MaxIm DL downloads the camera



If this is the case, the CPU clock in your PC is at the wrong frequency. Note

that this will probably not cause your real-time clock display to be wrong,

because there are several different timer clocks in a modern PC; probably just

one of them is slightly off.



In this latter situation, which I think is more likely, you can safely ignore

the whole issue. It isn't real. (I am saying here that I trust SBIG more than

Taiwanese motherboard manufacturers).



A stopwatch will tell you which is reality. Time your exposure.



Also, what CPU, motherboard, and chipset are you running?



Doug



---------------



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



---------------



----------------------------

#32016 Apr 29, 2008

Dean Salman wrote: >

> Not sure if I follow you, would that be a software or hardware

> issue. The reason I ask is because the 2 other software programs I

> took a 5 minutes exposure with took only 9 seconds to display the

> image after it was ended.



There are several different clocks in a modern computer. The other programs may

be using a different timer.



If you verify the problem and it proves to be a computer chipset problem, then

I'll look into changing the way we calculate elapsed time during exposures.

That would be an example of software paving over hardware problems. Story of my

life...



Doug



---------------



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



---------------



----------------------------

#32017 Apr 29, 2008

I can use a stop watch and time this but this is a fairly new fast

system. You really don't have to wait fot night time, this could be

done with that ST-2000 camera you have. Just take the same exposure

in CCDOP's and Maxim and compare. But I will do the same this

afternoon when i get home







--- In MaxImDL@yahoogroups.com, "Douglas B. George" dgeorge@...>

wrote: >

> Dean Salman wrote:

> >

> > Doug, I was doing some testing to see what I can help with on

input. > > The fact is the longer the exposure the worst it is. If I take a

10 > > second exposure, the reading CCD displays so fast I almost do not

see > > it. When I increase the exposure to 300 seonds, the reading CCD

now > > takes about 6 seconds and then the download. Maybe that is why I

> > though the focus was not doing this.

> >

> > Hope that helps

>

> Indeed. This suggests that there is a discrepancy between the CPU

clock and the > camera clock. Either the camera's exposure timer is running slow

or the CPU > clock is running fast.

>

> Here's the sequence of events, assuming the camera runs 1.66% slow:

>

> 1. You start a 300 second exposure

>

> 2. 300 seconds pass, MaxIm DL automatically switches the display

to "Reading" >

> 3. The camera continues exposing for another 6 seconds

>

> 4. The camera finishes its 306 second exposure and signals MaxIm

DL that it is > ready to read out

>

> 5. MaxIm DL downloads the camera

>

> If this is the case, your camera needs service.

>

> Second case, assuming the CPU clock runs 1.66% fast:

>

> 1. You start a 300 second exposure

>

> 2. 294 seconds pass, and MaxIm DL thinks 300 seconds has passed

because the CPU > clock is running fast. It switches the display to "Reading"

>

> 3. The camera continues exposing for another 6 seconds

>

> 4. The camera finishes its 300 second exposure and signals MaxIm

DL that it is > ready to read out

>

> 5. MaxIm DL downloads the camera

>

> If this is the case, the CPU clock in your PC is at the wrong

frequency. Note > that this will probably not cause your real-time clock display to

be wrong, > because there are several different timer clocks in a modern PC;

probably just > one of them is slightly off.

>

> In this latter situation, which I think is more likely, you can

safely ignore > the whole issue. It isn't real. (I am saying here that I trust

SBIG more than > Taiwanese motherboard manufacturers).

>

> A stopwatch will tell you which is reality. Time your exposure.

>

> Also, what CPU, motherboard, and chipset are you running?

>

> Doug

>

---------------

>

> Doug George

> dgeorge@...

>

> Diffraction Limited

> Makers of Cyanogen Imaging Products

> www.cyanogen.com

>

> 100 Craig Henry Dr., Suite 202

> Ottawa, Ontario,

> Canada, K2G 5W3

>

> Phone: (613) 225-2732

> Fax: (613) 225-9688

>

---------------

>







----------------------------

#32024 Apr 29, 2008

Using a digital stop watch, all three programs were set at 300

seconds and so was the stop watch. They all reach 0 seconds at the

same exact time. The other two programs tool 10 seconds before I saw

an image, Maxim Dl took 6 seconds longer.



This time I used the expose tab and did not see Reading CCD, not sure

why this time, but after the the exposure was ended, Maxim DL paused

for those 6 seconds when and the timer was sitting at 300 seconds.

Then the download started and 10 seconds later I had an image.



My conclusion,



My camera clock is slow and Maxim DL must wait for a command from the

camera that it is done before downloading. Which the other software

programs start to download right away reguardless if it is done.



OR



Maxim DL does something in the background that makes it wait.



I have a friend that has a new ST-10 XME, if it does the same as my

camera then I will just leave it as is since 6 extra seconds does not

matter and it will remain a puzzle.







--- In MaxImDL@yahoogroups.com, "Dean Salman" cluster@...> wrote:

>

> I can use a stop watch and time this but this is a fairly new fast

> system. You really don't have to wait fot night time, this could

be

> done with that ST-2000 camera you have. Just take the same

exposure

> in CCDOP's and Maxim and compare. But I will do the same this

> afternoon when i get home

>

>

>

> --- In MaxImDL@yahoogroups.com, "Douglas B. George" dgeorge@>

> wrote:

> >

> > Dean Salman wrote:

> > >

> > > Doug, I was doing some testing to see what I can help with on

> input.

> > > The fact is the longer the exposure the worst it is. If I take

a

> 10

> > > second exposure, the reading CCD displays so fast I almost do

not

> see

> > > it. When I increase the exposure to 300 seonds, the reading CCD

> now

> > > takes about 6 seconds and then the download. Maybe that is why

I

> > > though the focus was not doing this.

> > >

> > > Hope that helps

> >

> > Indeed. This suggests that there is a discrepancy between the

CPU

> clock and the

> > camera clock. Either the camera's exposure timer is running slow

> or the CPU

> > clock is running fast.

> >

> > Here's the sequence of events, assuming the camera runs 1.66%

slow:

> >

> > 1. You start a 300 second exposure

> >

> > 2. 300 seconds pass, MaxIm DL automatically switches the display

> to "Reading"

> >

> > 3. The camera continues exposing for another 6 seconds

> >

> > 4. The camera finishes its 306 second exposure and signals MaxIm

> DL that it is

> > ready to read out

> >

> > 5. MaxIm DL downloads the camera

> >

> > If this is the case, your camera needs service.

> >

> > Second case, assuming the CPU clock runs 1.66% fast:

> >

> > 1. You start a 300 second exposure

> >

> > 2. 294 seconds pass, and MaxIm DL thinks 300 seconds has passed

> because the CPU

> > clock is running fast. It switches the display to "Reading"

> >

> > 3. The camera continues exposing for another 6 seconds

> >

> > 4. The camera finishes its 300 second exposure and signals MaxIm

> DL that it is

> > ready to read out

> >

> > 5. MaxIm DL downloads the camera

> >

> > If this is the case, the CPU clock in your PC is at the wrong

> frequency. Note

> > that this will probably not cause your real-time clock display to

> be wrong,

> > because there are several different timer clocks in a modern PC;

> probably just

> > one of them is slightly off.

> >

> > In this latter situation, which I think is more likely, you can

> safely ignore

> > the whole issue. It isn't real. (I am saying here that I trust

> SBIG more than

> > Taiwanese motherboard manufacturers).

> >

> > A stopwatch will tell you which is reality. Time your exposure.

> >

> > Also, what CPU, motherboard, and chipset are you running?

> >

> > Doug

> >

---------------

> >

> > Doug George

> > dgeorge@

> >

> > Diffraction Limited

> > Makers of Cyanogen Imaging Products

> > www.cyanogen.com

> >

> > 100 Craig Henry Dr., Suite 202

> > Ottawa, Ontario,

> > Canada, K2G 5W3

> >

> > Phone: (613) 225-2732

> > Fax: (613) 225-9688

> >

---------------

> >

>



----------------------------

#33366 Aug 17, 2008

Somewhere from Maxim DL 5 beta to its release, the reading CCD delay

issue that 4.62 had is gone. Thanks.



Dean



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