Offical AMC 8 Transition Thread (was Sat. AMC-8)

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Wed Feb 15, 2017 7:13 pm

Has anybody seen what transponder(s) will be used on the new bird? LyngSat hasn't been updated yet.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by ChuckG » Wed Feb 15, 2017 7:52 pm

themarcshow wrote:
Wed Feb 15, 2017 11:56 am

So, Is a Scientific Atlanta model 9000 2.8m solid dish 2 degree compliant?
I don't believe it is. Sure did put a lot of those in about 25-30 years ago, they held up quite well but they're just too small.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Wed Feb 15, 2017 8:35 pm

ChuckG wrote:
Wed Feb 15, 2017 7:52 pm
themarcshow wrote:
Wed Feb 15, 2017 11:56 am

So, Is a Scientific Atlanta model 9000 2.8m solid dish 2 degree compliant?
I don't believe it is. Sure did put a lot of those in about 25-30 years ago, they held up quite well but they're just too small.
Is this the dish that has a screwdriver adjustment of the polarization out on the outside edge of the dish? Really cool (but complicated) design but easy to aim and optimize. I have a couple of them scattered around that I think are about 10ft and probably not 2d compliant.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by Dale H. Cook » Thu Feb 16, 2017 6:30 am

themarcshow wrote:
Wed Feb 15, 2017 11:56 am
Is a Scientific Atlanta model 9000 2.8m solid dish 2 degree compliant? ... This dish was installed in 1999.
It may be a 2-degree dish, as 2-degree spacing was authorized in 1986. If it was used for AMC-8, however, it might be a 2-degree dish - many stations have successfully continued to use 3-degree dishes for AMC-8.

Do you know for a fact that the dish was new in 1999? If it is one of the beige SA dishes (with brown lettering, IIRC) originally used with DAT receivers it may predate 1999.
Last edited by Dale H. Cook on Thu Feb 16, 2017 4:21 pm, edited 1 time in total.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by ncradioeng » Thu Feb 16, 2017 12:23 pm

Here's a screenshot of the transponders that have the providers on AMC-18 (full sweep of LNB output).

http://www.broadcastengineering.info/do ... ew&id=1289
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by themarcshow » Thu Feb 16, 2017 3:08 pm

Dale H. Cook wrote:
Thu Feb 16, 2017 6:30 am
themarcshow wrote:
Wed Feb 15, 2017 11:56 am
Is a Scientific Atlanta model 9000 2.8m solid dish 2 degree compliant? ... This dish was installed in 1999.
It may be a 2-degree dish, as 2-degree spacing was authorized in 1986. If it was used for AMC-8, however, it might be a 2-degree dish - many stations have successfully continued to use 2-degree dished for AMC-8.

Do you know for a fact that the dish was new in 1999? If it is one of the beige SA dishes (with brown lettering, IIRC) originally used with DAT receivers it may predate 1999.
It is a beige dish with brown lettering. My only 'concrete' clue to it's date is literally the concrete pad this dish sits on. A previous owner etched his initials and 11/99 into the wet concrete.

It has been on AMC-8 since before I arrived at this station.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by Dale H. Cook » Thu Feb 16, 2017 4:23 pm

I don't know how well it will work on AMC-18, as I haven't used one of those SA dishes since about 1996.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by ChuckG » Thu Feb 16, 2017 8:05 pm

kkiddkkidd wrote:
Wed Feb 15, 2017 8:35 pm
ChuckG wrote:
Wed Feb 15, 2017 7:52 pm
themarcshow wrote:
Wed Feb 15, 2017 11:56 am

So, Is a Scientific Atlanta model 9000 2.8m solid dish 2 degree compliant?
I don't believe it is. Sure did put a lot of those in about 25-30 years ago, they held up quite well but they're just too small.
Is this the dish that has a screwdriver adjustment of the polarization out on the outside edge of the dish? Really cool (but complicated) design but easy to aim and optimize. I have a couple of them scattered around that I think are about 10ft and probably not 2d compliant.
No, it's a plain 9-foot dish with an 8-piece reflector, had to assemble them on site. 4 struts to hold the LNA. Paired with the S/A DATS receiver in the 1980's.
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by Deep Thought » Thu Feb 16, 2017 9:53 pm

I put one of those erector sets together by myself. Was the last thing I did before I became a consultant. Was for NBC's "The Source" network in 1983. Was fun to tune around on the SCPC receiver's IF looking for stuff until we got the 7300 DATS receiver. :mrgreen: :)
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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Fri Feb 17, 2017 2:33 pm

Anybody know if the backup bird (SES-1) at 101d is operating yet? Also, are all of the services being duplicated on it? I don't seem to find info on it other than it is supposed to exist.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Sat Feb 18, 2017 11:35 am

Anybody know of a complete list of sat beacon freqs? There is a partial list at

http://www.engineeringradio.us/blog/201 ... tek-2832u/

But it doesn't include the new 105 and 101 degree slots.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Sat Feb 18, 2017 11:56 am

kkiddkkidd wrote:
Sat Feb 18, 2017 11:35 am
Anybody know of a complete list of sat beacon freqs? There is a partial list at

http://www.engineeringradio.us/blog/201 ... tek-2832u/

But it doesn't include the new 105 and 101 degree slots.

Regards,
Sort of disregard...

SatBeams.com indicates that:

139d Beacon(s): 3700.5H, 4199.5V
105d Beacon(s): 3700.5H, 4199.5V
101d Beacon(s): 3700.5H, 4199.5V

I haven't verified these freqs.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by ncradioeng » Tue Feb 21, 2017 1:43 pm

FYI -

Moved an old Harris white antenna over to AMC-18. Before the move the EbNo on the Wegener iPump was 12.0 and on the XDS it was 11.5. After the move it is 10.5 on the Wegener and 7.9 on the XDS (jumps around a little). Getting the polarization optimized is a PTIA since the screws holes in the sub-reflector at the front is on 45-degree increments and turning the whole support assembly from behind involves a lot of screws that haven't been loosened in years. Putting a little pressure on the reflector in any direction makes the signal go down.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by kkiddkkidd » Sat Feb 25, 2017 3:33 pm

1 down about 20 to go...

We moved a 2 yr old 3.7m Prodlen dish on Thursday and other than being VERY congested in the area of the new 105d bird, it didn't go too bad. The ESPN receiver now indicates about the same AG as before with an EBNO of 15. Another XDS (that I don't recall the provider, WW1 prob) was showing about the same AG as the ESPN RX but the EBNO was only about 9. We carefully adjusted the dish for best EBNO and it settled at 13+.

I have a SatLink meter that will show some perimeters and unencrypted video directly from the LNB. It actually caused a bit of consternation when I found a bird with test patterns plainly identifying a sat at 103d with some other parameters. It was either a backup or someone hasn't updated the test pattern text. It was actually several birds west of 105d.

It took us about 3hrs total to reaim including some real straining by 2ea broken down middle aged radio guys. Raising the elevation to 45d from 22 on that Prodlen dish is a pretty major lift. Management wanted it done in 2hrs during a local show but thankfully I insisted that we have a 4hr window.

I had intended to make measurements on LNB skews, xponder ID's (SatLink), etc but got called to another client before doing so.

Things I learned on this one:

1. Don't believe what you read on test patterns.
2. Make sure that you have plenty of time.
3. 3 of 4 XDS receivers required a reboot to reacquire the new signal. I eventually rebooted them all but 3 never attempted to reacquire at all.
4. A Wegner receiver immediately acquired the 105d signal (I noticed it had locked first) but continued to reboot itself until I power cycled it.
5. I am looking into some type of light weight, mechanical jack that will lift a couple hundred pounds thru the arc needed. I was thinking about something that would go into the receiver on my truck but discarded that idea due to access problems at several of my clients.
6. One sat seemed to have the same programming on both V+H. At least the SatLink meter showed the exact same video on a couple of transponders that were in the clear.

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Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Post by TPT » Sat Feb 25, 2017 6:49 pm

Supposedly the major networks have downloaded (internet? Sat feed? both?) the settings for the new bird. Now would be the time to make sure any idle receivers that may be needed later (e.g.--for a sports feed) are powered up and hooked up to the internet and the present AMC-8 satellite feed so they will be ready when moved over to the new bird.

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