Date   

Re: AP1200 and TPoint

Yves Laroche
 

Hi Ray,

the weather here in Quebec is bad since 10 days so I can't do some test
myself. Hope this will change tomorrow.

Yves


Ray Gralak wrote:

Hi Yves,

No, I would always leave the camera attached. It was so long ago since I last tried using TPoint that it could have been a number of
different things that caused the problem. When I finally get some decent weather here I will try it out again. The last two mornings
have been clear (but cloudy the night before) so I'm hoping the weather will improve soon.

-Ray

-----Original Message-----
From: Yves Laroche [mailto:yves.laroche@...]
Sent: Saturday, April 26, 2003 10:48 PM
To: ap-gto@...
Subject: Re: [ap-gto] Re: AP1200 and TPoint


Hi Ray!

You said you have always to do a short mapping run. Did you disconnect
the ccd camera from telescope at the end of session?

Thank you,

Yves


Ray Gralak wrote:



Hi Pat,

I'm glad that your results were so good! Can you summarize the entire
procedure from parking to unparking? Did you use the Park command in
TheSky? Whenever I have tried this (restarting) pointing would be close
but not right on and synching would make things worse. A short 6-star
Tpoint run seemed always necessary and then pointing was good again.
It sounds like you were able to get spot-on pointing accuracy without
the initial short TPoint run.

-Ray





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Voir: http://www.globetrotter.net/astroccd/astro-l.htm




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


Re: AP1200 and TPoint

Ray Gralak <ray@...>
 

Hi Yves,

No, I would always leave the camera attached. It was so long ago since I last tried using TPoint that it could have been a number of
different things that caused the problem. When I finally get some decent weather here I will try it out again. The last two mornings
have been clear (but cloudy the night before) so I'm hoping the weather will improve soon.

-Ray

-----Original Message-----
From: Yves Laroche [mailto:yves.laroche@...]
Sent: Saturday, April 26, 2003 10:48 PM
To: ap-gto@...
Subject: Re: [ap-gto] Re: AP1200 and TPoint


Hi Ray!

You said you have always to do a short mapping run. Did you disconnect
the ccd camera from telescope at the end of session?

Thank you,

Yves


Ray Gralak wrote:

Hi Pat,

I'm glad that your results were so good! Can you summarize the entire
procedure from parking to unparking? Did you use the Park command in
TheSky? Whenever I have tried this (restarting) pointing would be close
but not right on and synching would make things worse. A short 6-star
Tpoint run seemed always necessary and then pointing was good again.
It sounds like you were able to get spot-on pointing accuracy without
the initial short TPoint run.

-Ray



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Re: AP1200 and TPoint

Yves Laroche
 

Hi Ray!

You said you have always to do a short mapping run. Did you disconnect the ccd camera from telescope at the end of session?

Thank you,

Yves


Ray Gralak wrote:

Hi Pat,

I'm glad that your results were so good! Can you summarize the entire
procedure from parking to unparking? Did you use the Park command in TheSky? Whenever I have tried this (restarting) pointing would be close but not right on and synching would make things worse. A short 6-star Tpoint run seemed always necessary and then pointing was good again. It sounds like you were able to get spot-on pointing accuracy without
the initial short TPoint run.

-Ray


Re: Daylight Saving Question

Yves Laroche
 

Pat,
I forgot to mention than your GMT offset (DST) is displayed when you are
in Telescope | Options | Initialize but a higher value will be send if
you press Set GMT.
If you have some problem as an alternative you can try to power on your
mount with the keypad (DST set) , open TheSky and do initialisation
process with only Set Time. In the last case, the keypad will send time,
latitude, longitude and GMT offset to the servo controller but with
TheSky, the Set Time will overwrite the time set by the keypad.

BTW, would you check how many digit are displayed for latitude and
longitude in Telescope | Options | Initialize and tell me? Thank you,

Yves


Hope this will help,

Yves


Yves Laroche wrote:

Pat,
in your area, the time zone should be +06 (PST) so try +05 for DST.
Type ":SG +05#" without quotes. This command is case sensitive and
there is a space between :SG and +05#

Hope this will help,

Yves


Patrick J. Madden wrote:



Hello, Yves! I do not live in the Eastern Time Zone, but in the Central Time Zone. What should I type? Thanks!Pat

Yves Laroche <yves.laroche@...> wrote:Hi Pat,

If you are using TheSky 5.00.100, there is a bug in the initialisation
process with Set GMT. The Set GMT will set your mount to +5 (EST)
instead of +4 (DST).
In TkeSky terminal box (Telescope | Options | Terminal) try typing ":SG
+04#" without quotes and check the telescope pointing.

Hope this help,

Yves Larioche


Patrick J. Madden wrote:





I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

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Les listes ASTRO et ASTRODIX travaillent en concertation
Voir: http://www.globetrotter.net/astroccd/astro-l.htm




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Re: Daylight Saving Question

Yves Laroche
 

Pat,
in your area, the time zone should be +06 (PST) so try +05 for DST.
Type ":SG +05#" without quotes. This command is case sensitive and
there is a space between :SG and +05#

Hope this will help,

Yves


Patrick J. Madden wrote:

Hello, Yves! I do not live in the Eastern Time Zone, but in the Central Time Zone. What should I type? Thanks!Pat

Yves Laroche <yves.laroche@...> wrote:Hi Pat,

If you are using TheSky 5.00.100, there is a bug in the initialisation
process with Set GMT. The Set GMT will set your mount to +5 (EST)
instead of +4 (DST).
In TkeSky terminal box (Telescope | Options | Terminal) try typing ":SG
+04#" without quotes and check the telescope pointing.

Hope this help,

Yves Larioche


Patrick J. Madden wrote:



I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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--
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Les listes ASTRO et ASTRODIX travaillent en concertation
Voir: http://www.globetrotter.net/astroccd/astro-l.htm




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


Re: Daylight Saving Question

Patrick J. Madden <unvat001@...>
 

Hello, Yves! I do not live in the Eastern Time Zone, but in the Central Time Zone. What should I type? Thanks!Pat

Yves Laroche <yves.laroche@...> wrote:Hi Pat,

If you are using TheSky 5.00.100, there is a bug in the initialisation
process with Set GMT. The Set GMT will set your mount to +5 (EST)
instead of +4 (DST).
In TkeSky terminal box (Telescope | Options | Terminal) try typing ":SG
+04#" without quotes and check the telescope pointing.

Hope this help,

Yves Larioche


Patrick J. Madden wrote:

I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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Re: Pulse guider question (OT)

Mike J. Shade <mshade@...>
 

At 06:48 AM 4/26/2003 -0700, you wrote:
Hi Mike,

You can send the time to the mount with Pulseguider but it won't do it automatically. It should not make any difference that it was
still running after the mount was parked.

-Ray
OK, thanks, thought of doing yet another mapping run of 100 stars while it is 60 with 15% humidity tonight was a bit much....Yes, it was (last night) one of those Southern Arizona nights.


-----Original Message-----
From: Mike J. Shade [mailto:mshade@...]
Sent: Saturday, April 26, 2003 1:43 AM
To: ap-gto@...
Subject: [ap-gto] Pulse guider question (OT)


This is primarily for Ray, does your program work the same as the 1200
handpad in that it sends a time signal to the mount? Forgot to disconnect
Pulse Guider PRIOR to parking with The Sky so mount ran for maybe 20
seconds after being parked...make any difference? I would think that when
I send an accurate time Signal to the mount via The Sky it shouldn't make
any difference but wonder if a mapping run is in my future tomorrow night...

Thanks,


Mike J. Shade: mshade@...
Sonoita Hills Observatory, Sonoita Arizona

See work done at the observatory: http://c3po.cochise.cc.az.us/astro
under the "photographs and images" panel on the left of the screen.

"I like the dark, it's cheap." E. B. Srooge



To UNSUBSCRIBE, or for general information on the ap-gto list
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To UNSUBSCRIBE, or for general information on the ap-gto list
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Mike J. Shade: mshade@...
Sonoita Hills Observatory, Sonoita Arizona

See work done at the observatory: http://c3po.cochise.cc.az.us/astro
under the "photographs and images" panel on the left of the screen.

"I like the dark, it's cheap." E. B. Srooge


Re: Daylight Saving Question

Ray Gralak <ray@...>
 

Hi Pat,

If we EVER have any cloudless and rainless nights here again in San Jose I would actually be able to test this but I think you just
need to adjust the Time Zone offset in the keypad and with PulseGuider.

-Ray

-----Original Message-----
From: Patrick J. Madden [mailto:unvat001@...]
Sent: Saturday, April 26, 2003 6:07 AM
To: ap-gto@...
Subject: [ap-gto] Re: Daylight Saving Question


I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or
change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program,
Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed
on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether
used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before
flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it
occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks
for any help. Pat Madden

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Re: Daylight Saving Question

Yves Laroche
 

try typing ":SG +04#" without quotes and check the telescope pointing.



Yves Laroche wrote:

Hi Pat,

If you are using TheSky 5.00.100, there is a bug in the initialisation
process with Set GMT. The Set GMT will set your mount to +5 (EST)
instead of +4 (DST).
In TkeSky terminal box (Telescope | Options | Terminal) try typing ":SG
+04#" without quotes and check the telescope pointing.

Hope this help,

Yves Larioche


Patrick J. Madden wrote:



I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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The New Yahoo! Search - Faster. Easier. Bingo.

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--
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Les listes ASTRO et ASTRODIX travaillent en concertation
Voir: http://www.globetrotter.net/astroccd/astro-l.htm




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


Re: Pulse guider question (OT)

Ray Gralak <ray@...>
 

Hi Mike,

You can send the time to the mount with Pulseguider but it won't do it automatically. It should not make any difference that it was
still running after the mount was parked.

-Ray

-----Original Message-----
From: Mike J. Shade [mailto:mshade@...]
Sent: Saturday, April 26, 2003 1:43 AM
To: ap-gto@...
Subject: [ap-gto] Pulse guider question (OT)


This is primarily for Ray, does your program work the same as the 1200
handpad in that it sends a time signal to the mount? Forgot to disconnect
Pulse Guider PRIOR to parking with The Sky so mount ran for maybe 20
seconds after being parked...make any difference? I would think that when
I send an accurate time Signal to the mount via The Sky it shouldn't make
any difference but wonder if a mapping run is in my future tomorrow night...

Thanks,


Mike J. Shade: mshade@...
Sonoita Hills Observatory, Sonoita Arizona

See work done at the observatory: http://c3po.cochise.cc.az.us/astro
under the "photographs and images" panel on the left of the screen.

"I like the dark, it's cheap." E. B. Srooge



To UNSUBSCRIBE, or for general information on the ap-gto list
see http://groups.yahoo.com/group/ap-gto

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Re: Daylight Saving Question

Yves Laroche
 

Hi Pat,

If you are using TheSky 5.00.100, there is a bug in the initialisation process with Set GMT. The Set GMT will set your mount to +5 (EST) instead of +4 (DST).
In TkeSky terminal box (Telescope | Options | Terminal) try typing ":SG +04#" without quotes and check the telescope pointing.

Hope this help,

Yves Larioche


Patrick J. Madden wrote:

I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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Re: Daylight Saving Question

Patrick J. Madden <unvat001@...>
 

I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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The New Yahoo! Search - Faster. Easier. Bingo.


Re: Daylight Saving Question

Bill Gardner <gardner.w@...>
 

I had similar behavior from my 900 after the time change for a couple of nights. Ray's Pulse Guider fixed the problem nicely I found. I set the keypad to the proper time zone and daylight savings settings over again, set the laptop time from the internet atomic clocks and then used Pulse Guider to reset the mount's time. Since then I have not had any strange 15 degree problems. Sorry can't help with tpoint though.

Bill

At 06:07 AM 26/04/03 -0700, you wrote:
I have had nothing but grief since we changed to daylight saving time. Will someone give me a list of things I need to do, or change when the time changes, in addition to changing the clock on my computer? Last night I finally realized that my dome program, Digital Dome Works, has a DST setting that needs to be checked. It is behaving much better now. I also have the DST setting fixed on the keypad, which I normally do not use for startup anyway. My 1200 mount has not been flipping over at the meridian, whether used with the keypad or with TheSky. Something wants to put the telescope about 15 degrees too far "under" the polar axis before flipping it over to the east side. Also, I thought I had finally licked the TPoint question. Now I am way off on startup. And it occurs to be that "way off" might be 15 degrees, which is suspiciously like another DST button somewhere that needs pushed! Thanks for any help. Pat Madden

---------------------------------
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http://members.rogers.com/gardner.w/


Pulse guider question (OT)

Mike J. Shade <mshade@...>
 

This is primarily for Ray, does your program work the same as the 1200 handpad in that it sends a time signal to the mount? Forgot to disconnect Pulse Guider PRIOR to parking with The Sky so mount ran for maybe 20 seconds after being parked...make any difference? I would think that when I send an accurate time Signal to the mount via The Sky it shouldn't make any difference but wonder if a mapping run is in my future tomorrow night...

Thanks,


Mike J. Shade: mshade@...
Sonoita Hills Observatory, Sonoita Arizona

See work done at the observatory: http://c3po.cochise.cc.az.us/astro
under the "photographs and images" panel on the left of the screen.

"I like the dark, it's cheap." E. B. Srooge


Re: Image: M97

Steve Reilly <sreilly@...>
 

Nice Owl Bill. I have always been very pleased with the tracking
abilities of these mounts. I've seen the mount bent over backwards and
still guiding like a champ.

Steve

-----Original Message-----
From: Bill Gardner [mailto:gardner.w@...]
Sent: Thursday, April 24, 2003 12:54 PM
To: ap-gto@...
Subject: [ap-gto] Image: M97


My taget last night was the Owl Nebula (M97). After a few false
starts with computer problems I got the image going. The tracking was
a little more finicky than previous images I have been working on, but
then that is a result of the increase in focal length. I used some of
the tips I have read here, with setting up the mount to image through
the meridan in one large sweep. It always amazes me how stable the
mount is with the scope in the strangest positions.

The image can be found at:

http://members.rogers.com/gardner.w/html/m97-april-23-2003.htm

The image was captured, reduced, aligned and combined in CCDSoft v5.
Processing was then done in PhotoShop 7. Other information regarding
image and equipment can be found below the image.

Bill Gardner


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Image: M97

Bill Gardner <gardner.w@...>
 

My taget last night was the Owl Nebula (M97). After a few false
starts with computer problems I got the image going. The tracking was
a little more finicky than previous images I have been working on, but
then that is a result of the increase in focal length. I used some of
the tips I have read here, with setting up the mount to image through
the meridan in one large sweep. It always amazes me how stable the
mount is with the scope in the strangest positions.

The image can be found at:

http://members.rogers.com/gardner.w/html/m97-april-23-2003.htm

The image was captured, reduced, aligned and combined in CCDSoft v5.
Processing was then done in PhotoShop 7. Other information regarding
image and equipment can be found below the image.

Bill Gardner


Re: Protocol command

Yves Laroche
 

Roland,

some protocol commands can be send as a STRING of characters. I tried
sending ":V#" with Procomm (DOS) in Chat mode but this mode required
than a string command (including ENTER) must be send via the COM port.
The ":V#' must be send in terminal mode to work with Procomm

With TheSky terminal box, the protocol command ":V#" will not work
because this function has to send a STRING of characters instead of one
caracter at the time but some command will work.

Within TheSky terminal box, if I send a command like ":RC#" or "RC0#" or
"RC1#" or "RC2#" or "RC3# or others changing states command" , those
commands will work but not ":V#".

It seems than all INPUT or CHANGING STATES MODE command can be send as
STRING of characters so working with TheSky.

The GETTING INFOS command (":V#", ":GG#", "Gg#", "Gt#", "GL#", ":GL#",
"GR#", "GD#", "GA#", "GZ#") seem to work only like a GET_KEY protocol
not as GET_STRING so they don't work with TheSky.

It is possible to have a better understanding on how those commands must
be send and why ?

Roland, if you prefer, you can send me private e-mail if you don't what
to disturb others in the list with my technical request.

Thank you,

Yves


chris1011@... wrote:

In a message dated 4/23/2003 1:47:32 PM Central Daylight Time,
yves.laroche@... writes:




I checked the ":V#" command with Windows Hyper Terminal and it worked.
The only thing I found strange was than this command don't have to be
sent as a string caracters + ENTER. This command must be send by only
three keystrokes : V # and the controller sent immediately the
response D#. If an ENTER key was pressed after the :V# no response



Yes, that is correct. No "enter" required with Hyperterminal. Any non-
prototcol characters that are sent to the buffer will not be acted on and
will stay in the buffer until they are cleared with a # sign.



will be send by the controller and you must pressed # alone to clear the
buffer before sending any other command. It's why this command doesn't
woked in TheSky terminal box because it has not to be send as a string.
Other command can be send via a string + ENTER. Would you explain this
difference?


I'm not sure I understand this paragraph.

Roland Christen





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Re: Protocol command

Yves Laroche
 

Hi Roland,

I checked the ":V#" command with Windows Hyper Terminal and it worked.
The only thing I found strange was than this command don't have to be
sent as a string caracters + ENTER. This command must be send by only
three keystrokes : V # and the controller sent immediately the
response D#. If an ENTER key was pressed after the :V# no response
will be send by the controller and you must pressed # alone to clear the
buffer before sending any other command. It's why this command doesn't
woked in TheSky terminal box because it has not to be send as a string.
Other command can be send via a string + ENTER. Would you explain this
difference?

Concerning my initialisation problem of my 1200GTO mount with TheSky, I
found some bugs and people at Software Bisque are working on it.

Thank you,

Yves Laroche



chris1011@... wrote:

In a message dated 4/17/2003 1:59:21 PM Central Daylight Time,
yves.laroche@... writes:




I have the servo controller chip version D (1200GTO) and I can't
received the response "version number#" from TheSky terminal box when I
sent a ":V#" command without quotes of course. Other commands were not
working also but I can't remember them right now. I will check soon.
......... All the above problems permit me to think than maybe my 1200GTO
has a bug.


Yes, you are right - it does not work in The Sky. It works fine if you send
the same message in Hyperterminal. So, your theory that the mount has a bug
is not correct.

For the rest of your problems with TPOINT, I don't have a clue what it could
be. For that I would ask the other more experienced members to chime in.

Roland Christen



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


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--
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Les listes ASTRO et ASTRODIX travaillent en concertation
Voir: http://www.globetrotter.net/astroccd/astro-l.htm




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


Re: Protocol command

Roland Christen
 

In a message dated 4/23/2003 3:06:43 PM Central Daylight Time,
yves.laroche@... writes:



The GETTING INFOS command (":V#", ":GG#", "Gg#", "Gt#", "GL#", ":GL#",
"GR#", "GD#", "GA#", "GZ#") seem to work only like a GET_KEY protocol
not as GET_STRING so they don't work with TheSky.

It is possible to have a better understanding on how those commands must
be send and why ?
I'm sorry, I don't know how The Sky works internally, so there is no way for
me to know how to answer your questions. It may simply be that The Sky cannot
display the results of your queery to the mount.

Roland Christen


Re: Protocol command

Roland Christen
 

In a message dated 4/23/2003 1:47:32 PM Central Daylight Time,
yves.laroche@... writes:


I checked the ":V#" command with Windows Hyper Terminal and it worked.
The only thing I found strange was than this command don't have to be
sent as a string caracters + ENTER. This command must be send by only
three keystrokes : V # and the controller sent immediately the
response D#. If an ENTER key was pressed after the :V# no response

Yes, that is correct. No "enter" required with Hyperterminal. Any non-
prototcol characters that are sent to the buffer will not be acted on and
will stay in the buffer until they are cleared with a # sign.


will be send by the controller and you must pressed # alone to clear the
buffer before sending any other command. It's why this command doesn't
woked in TheSky terminal box because it has not to be send as a string.
Other command can be send via a string + ENTER. Would you explain this
difference?
I'm not sure I understand this paragraph.

Roland Christen