Help! Unable to get horizontal Ku on BSC621

[jeevesthefootman]

Hello BSC621 experts,

I have a BSC621 on a 10' Paraclipse BUD mated to a DSR920. I am getting all (H & V) C-band, but I am only getting Vertical Ku band. I can see Vertical channels on X-4 but no Horizontal. I've checked the DC voltage on the cable right at the antenna and I get 12 Volts on Vertical and 19 on Horizontal.

I'm unable to authorize my programming because X4-440 is horizontal!

Any suggestions would be most welcome !!!

[pmb1010]

I assume you have 2 cables coming from the LNBF to your receiver?

And that in the 920 configuration settings it has "C and KU band LNBF" selected?

[wejones]

Originally Posted by jeevesthefootman

Hello BSC621 experts,

I have a BSC621 on a 10' Paraclipse BUD mated to a DSR920. I am getting all (H & V) C-band, but I am only getting Vertical Ku band. I can see Vertical channels on X-4 but no Horizontal. I've checked the DC voltage on the cable right at the antenna and I get 12 Volts on Vertical and 19 on Horizontal.

I'm unable to authorize my programming because X4-440 is horizontal!

Any suggestions would be most welcome !!!

Did you measure voltage with lnbf connected, or just on the coax?
Did you measure voltage at the Ku lnbf, or at common switched connection.
Have you tried connecting straight to the Ku lnbf, rather than using the internal switch? Ie the switch might be eating up some of your voltage.

Edit: I agree with what PMB1010 said. Ie I was thinking that there was a chance that you're trying to use the switched Ku with the jumper rather than running direct, but that isn't likely I guess, as you'd be missing an input on the 920, and would have noticed.

[jeevesthefootman]

Originally Posted by pmb1010

I assume you have 2 cables coming from the LNBF to your receiver?

And that in the 920 configuration settings it has "C and KU band LNBF" selected?

Thanks for the reply! Yes to both questions.

[jeevesthefootman]

Edit: I agree with what PMB1010 said. Ie I was thinking that there was a chance that you're trying to use the switched Ku with the jumper rather than running direct, but that isn't likely I guess, as you'd be missing an input on the 920, and would have noticed.[/quote]

No, I have 2 coaxes attached. One goes directly to the end of the Ku portion (connecter furthest from the dish) and the other (C-band) goes to "RCV" port.

I have actually received signals from X4 channels, but only in Vertical mode. I strongly suspect that it is not switching and I'm just trying to figure out how check voltage with it connected to the LNB. Also, this is a brand new unit. I'm thinking maybe the horizontal portion may be defective?

I have tried rotating the unit 90 deg, but it does not seem to make a difference, other than to eliminate the vertical signals. Maybe a reflector problem?

BTW, I have been unable to find a manual for the BSC621. Everything comes up as BSC621-2 and refers to 22 khz and disEqc switching

[wejones]

Originally Posted by jeevesthefootman

No, I have 2 coaxes attached. One goes directly to the end of the Ku portion (connecter furthest from the dish) and the other (C-band) goes to "RCV" port.

I have actually received signals from X4 channels, but only in Vertical mode. I strongly suspect that it is not switching and I'm just trying to figure out how check voltage with it connected to the LNB. Also, this is a brand new unit. I'm thinking maybe the horizontal portion may be defective?

I have tried rotating the unit 90 deg, but it does not seem to make a difference, other than to eliminate the vertical signals. Maybe a reflector problem?

BTW, I have been unable to find a manual for the BSC621. Everything comes up as BSC621-2 and refers to 22 khz and disEqc switching

I posted a url for the manual a while back I think, when I noticed the same thing about the -2 coming up for both. It was in a discussion about one lnbf using 22khz and the other using diseqc I think.

I'd recommend putting a "T" in the line and checking the voltage off the "T". That way you see the actual voltage during use. 12V sounds a bit low, but should be high enough, but if it gets lower than that under load, it may not work.
The fact that you didn't get anything when you rotated 90 deg sounds like it isn't switching or that the lnbf just isn't getting enough voltage to work. You might try rotating 90 deg, but changing the setup so that it thinks you have a regular lnb rather than an lnbf. That way it would put out 18V so the lnbf would be working. Not a cure, but might verify that you have a voltage problem. I don't have a 920, so I don't know if it has an adjustment for lnbf voltage or not.

[wejones]

Try
http://www.dmsiusa.com/documents/621-manual.pdf

for the manual.

[jeevesthefootman]

Originally Posted by wejones

Try
http://www.dmsiusa.com/documents/621-manual.pdf

for the manual.

Thanks, but this manual still comes up with 22 khz switching.

Here is the label on my BSC621:

Digital C/KU LNBF
Model:BSC621
C-Band
LO:5150 MHz
Switching:0/22K
KU-Band
I/P: 11.7-12.5 GHz
O/P:950-1750 MHz
LO:10.75 GHz

I'm wondering if maybe I was shipped the wrong one?

[pmb1010]

I think the 621 does do 22khz switching, but only to go from C to Ku.

Since you have 2 cables, that isn't used anymore.
The 13/18v should be doing all the work.

I will be in the same postion as you, very soon. Dish gets here tomorrow, am working on acquiring a 621 to replace my 621-2, eventually.

[wejones]

Originally Posted by jeevesthefootman

Thanks, but this manual still comes up with 22 khz switching.

Here is the label on my BSC621:

Digital C/KU LNBF
Model:BSC621
C-Band
LO:5150 MHz
Switching:0/22K
KU-Band
I/P: 11.7-12.5 GHz
O/P:950-1750 MHz
LO:10.75 GHz

I'm wondering if maybe I was shipped the wrong one?

I think you're being confused by the picture in the manual. The above URL gives the manual for the BSC621, however it gives a picture of the 621-2 .
The 621 does have 22KHz switching and the 621-2 has Diseqc switching.

The URL for the 621-2 is http://www.dmsiusa.com/documents/621-2manual.pdf
and the above URL is correct for the 621.

In any event, for your application, the type switching doesn't matter, because you're not really using the switch. ... or at least you shouldn't be.

[jeevesthefootman]

In any event, for your application, the type switching doesn't matter, because you're not really using the switch. ... or at least you shouldn't be.[/quote]

That just occurred to me too! It's the Ku polarity switching that is my problem.....

Hope you don't have the problems I'm having !!!!

[jeevesthefootman]

I'd recommend putting a "T" in the line and checking the voltage off the "T". That way you see the actual voltage during use. 12V sounds a bit low, but should be high enough, but if it gets lower than that under load, it may not work.
The fact that you didn't get anything when you rotated 90 deg sounds like it isn't switching or that the lnbf just isn't getting enough voltage to work. You might try rotating 90 deg, but changing the setup so that it thinks you have a regular lnb rather than an lnbf. That way it would put out 18V so the lnbf would be working. Not a cure, but might verify that you have a voltage problem. I don't have a 920, so I don't know if it has an adjustment for lnbf voltage or not.[/quote]

OK. Here are the voltages measured right at the LNB. I made up a coax jumper, stripped away some insulation.

With the DSR920 set up for C/Ku LNBF:
X0-12 (horiz_left) 11.62 Volts
X0-13 (vert_right) 19.2 Volts

With the DSR920 set up for C/Ku LNB
X0-12 19.2 Volts
X0-13 19.2 Volts

Think I'm going to try a few 90 deg rotations and see what comes up.

[wejones]

another thing. not applicable, but look at:
BSC621 technical bulletin

this shows the alignment of c and ku probes. that's probably not the issue here, but it made me think that you should look to see if the small ku probe actually moves when changing polarity.

[jeevesthefootman]

Originally Posted by wejones

another thing. not applicable, but look at:
BSC621 technical bulletin

this shows the alignment of c and ku probes. that's probably not the issue here, but it made me think that you should look to see if the small ku probe actually moves when changing polarity.

Thanks. I saw them and checked it. They seem OK.

[jeevesthefootman]

Originally Posted by wejones

another thing. not applicable, but look at:
BSC621 technical bulletin

this shows the alignment of c and ku probes. that's probably not the issue here, but it made me think that you should look to see if the small ku probe actually moves when changing polarity.

Aren't they switched electronically? I see 4 probes ( 2 C and 2 Ku) I thought only the Corotor II and LNB setup have a probe that moves. I had one that died on me!

[wejones]

Originally Posted by jeevesthefootman

Aren't they switched electronically? I see 4 probes ( 2 C and 2 Ku) I thought only the Corotor II and LNB setup have a probe that moves. I had one that died on me!

You may be right. I looked at the picture, and only noticed 1 C and 1 Ku, but I didn't look very carefully. If there are 2 of each, you're probably right. I just assumed that they moved like my co-rotor, but electronic switching makes more sense.

[pmb1010]

I dont think they move, theres not enough guts in the thing for it to move.

And the last time I looked in the device, I only saw one probe.
(*Edit* Clarification --- One probe, as in One each Ku and One each C band probe...)

But I cant see too well anymore, so I could be wrong. Next time I take it down (maybe this weekend) I'll get the magnifier headset and look, maybe take a jpg for you guys.