school equipment

handsomejackuk · 02-03-2007

Hi,

I work in a school and have just come across our old satellite setup it consists of large dish looks like abput 2m diameter with actuator arm probably seized as this hasnt been used for about 8 years also got a lnb with a polariser on it. equipment is uniden ust 8010 receiver uniden ust 881 positioner uniden ust 92 d2 mac decoder. i think the receiver has been looked at before judging by a couple of screws missing in side front cover so think this mis faulty as it does not even switch on but the other two pieces of equipment and dish look in good order. is there any way of moving the motor by sticking 36v across the motor /actuator to try and move the dish also can i use this lnb for connecting to a fta comag sl65 or will i have to change th lnb assuming the dish to be pointing the right direction

Thanks Alun

**rolfw** · 02-03-2007

Take a couple of pictures and upload them, the members will be able to tell you what you need then.

You will need to change the LNB, but we need to see the flange type, if it is a standard 36v setup, then a V-Box should be able to move the dish, you never knw, if it was well greased, it may still move.

handsomejackuk · 02-03-2007

hey,

just hooked up my comag silvercrest sl65 to this 2m dish we have at school and hey presto after possibly 8 or 9 years this dish is still working. not sure what position the dish is at yet i not going to attempt to move it yet but picking up 10779 h 27500 sr cnn international anyone care to let me know what satellite this is ?

regards Alun

***CROSSBONES*** · 02-03-2007

now thats cool!

But after all those years the lnb is probably old. Does it have a noise figure on it? Measured in db`s.

CNN doesnt really narrow it down as its on a few sats. Any other channels on there?

You can move the actuator with a car bat, but it will move slower.

Would be interested to see some pics up of it.

**Analoguesat** · 02-03-2007

CNN doesnt transmit on 10779 anywhere in Europe!

The Silvercrest will be looking at a LNB LO freq of 9750, the lnb could be one of several frequencies - if you can give us more channels then we can probably identify it.

**Analoguesat** · 02-03-2007

I reckon you are on 19E- most of the CNN's are scrambled

**rolfw** · 02-03-2007

Yes, it will be Astra 1G (19.2E) - 11778.00 V - Txp:68 - Beam:Astra 1G DVB-S (QPSK) - 27500 3/4 - NID:1 - TID:1068

The LNB will be an old DBS type with Local Oscilator of 10,750 Mhz

**Analoguesat** · 02-03-2007

There you go happy traveller, your dish was last used for watching German TV in analogue

***2cvbloke*** · 02-03-2007

Originally Posted by Analoguesat

There you go happy traveller, your dish was last used for watching German TV in analogue

Could have been for sky analogue too...

**Analoguesat** · 02-03-2007

In a school its much more likely to have been set up for the mod langs dept.

***2cvbloke*** · 02-03-2007

Originally Posted by Analoguesat

In a school its much more likely to have been set up for the mod langs dept.

Ah....

Maybe one of the teachers brought their old sky analogue card or box in for the staff room during lunch and break times....

You never know, teachers are odd creatures...

**Analoguesat** · 02-03-2007

I do know - I work in the local high school

***2cvbloke*** · 02-03-2007

Originally Posted by Analoguesat

I do know - I work in the local high school

Poor you, I was glad to have escaped the prison that is school in 2001....

handsomejackuk · 05-03-2007

Thanks for all the replies on this subject. the last technician left about 8 years ago and he was involved in setting up the dish and equipment so i am led to believe. sorry for the long reply as i have no internet access at home at the moment. I will take some pics of this seup later, but the dish is quite high up and not to keen to mess about with it to much as its working at the moment. Pity the original uniden receiver has packed up as i would have liked to played about with it. May get a cheap second hand analogue receiver for home use. and school would be handy for setting up my dish at home. Any thoughts on analogue receivers and prices what would be best to get ? When my silvercrest scanned it did say astra on some of the channels. so may be the dish is pointing 19.2e

Thanks 4 now Alun

**rolfw** · 05-03-2007

Just have a look on Ebay

330093980309 No Remote so avoid

110096869064

Above are two Echostar Digital/analogue receivers with 36v positioner, ideal for your purposes.

Or the Pace MSS 508i analogue only with inetgrated positioner 250089105471

handsomejackuk · 05-03-2007

pics of school setup as requested..

handsomejackuk · 05-03-2007

Analogue sat,

my sl65 is not picking up anything else only cnn

video pid is 0165
audio pid is 0100
pcr pid is 0165

if this is any help.

when i do a scan i get loads of channels coming up with the name carrier 1,2 3 4 etc and a couple that say astra so maybe it is astra 19.2. signal is banging the doors out on 99% so no prob with signal. do you think the lnb on the dish is only covering a certain frequency and that is why i only got one channel ?

picture submitted shows cnn but satellite shows a bird 5w. i have scanned astra and other satellites but no joy yet.

Thanks 4 now

Alun

**Analoguesat** · 05-03-2007

You are on 19E ok, but your lnb is a 10750MHz type and the receiver is looking for 9750MHz for low band or 10600MHz high band so all the frequencies are miles out.

Try playing with the lnb settings within the receiver menu and see if it will let you set 10750 MHz

**Llew** · 05-03-2007

Remember you'll still only receive the vertical channels, as you have no means of switching the LNB's polarity unless you use a receiver with polariser control (presuming you still have access to the polariser's cabling).

Llew

**rolfw** · 05-03-2007

Yes correct, however, if the OP buys the Echostar I suggest above, that should do it all, as it has polarizer control.

Having said that, with a 10.75 Ghz Local Oscilator, he will miss all of the low band channels, so the LNB really needs replacing.

***CROSSBONES*** · 06-03-2007

The dishes feed and arms look like a channel master?

If it is get it home quick! Does it have the polar mount?

handsomejackuk · 06-03-2007

thanks all for your info will try settings on receiver l8r i assume the polarising lnb has some sort of stepper motor on it to enable it to turn through 180 degrees as i think a polar mount is not the same as stab motor mount i.e. the dish turns and no skew adjustment with modern setup. modern lnbs only v and h polarity. is there any way of putting a voltage up the polariser connection to turn the lnb. i have six additional wires coming in from the dish would these be 4 for the positioner 2 for the lnb (plus the coax which i can identify.) is there anyway of identifying these cables with a meter without going up to the dish ?

Alun

**Llew** · 06-03-2007

The polarotor servo motor needs to be pulse driven (+/-5V pulses). Only receivers with this facility can be used. By 'two for the LNB' I assume you mean twin and screen (+5V, pulse and ground).

Llew

handsomejackuk · 06-03-2007

total flexes are 4 one being the coax inner and outer braid, two flexes which i think are the motor / positioner (four cables total) ,and one flex going to the lnb polariser with two calbes inside.

thanks Alun

06-03-2007	#25
Llew cerca trova... Join Date: 01-01-2000 Location: East Anglia Posts: 4947 Thanks: 17 Thanked 238 Times in 221 Posts Blog Entries: 1 My System: Triple Dragon with HDD/USB stick, Humax HDCI2000, Echostar AD3000ip & SR8700, Fortecstar 5100CIUltra, Aston Simba, RSD ODM300. Swedish Microwave 1.2 Motorised dish / Invacom C120