SW21 switches

[Phottoman]

All of my old switches are weather worn, so I can't just look at one and see the answer to this question.

I ordered from a very trustful sourse a few switches, 2 discqe and three sw21 switches. When they arrived today, I was excited and looking at them I see they are 0/22KHz switches. Is this normal?

Two of them are (I think) ECODA switches (seem pretty small) and one is "DMS International." LNB A on the DMS is marked 0KHz, LNB B is marked 22KHz. The ECODA switches are marked the opposite, LNB A is 22KHz and LNB B is 0KHz.

Also, I know there is a differance between SW21 and SW21X, the DMS is marked SW-21K ... does that matter?

Are these useful for NON 22KHz switching or are they only used for 22KHz on and off?

(I hate to sound newbie-ish, but I HAD to ask.)

My goal here is to combine several non moving dishes for use with a Conaxsat DUO.

Photto

 

[Anole]

I stuck my foot in my mouth a couple of years ago by saying a SW21 was a DishNetwork switch, not an FTA 22khz switch.
I was informed that one of our vendors sold a 22khz switch with a very similar name, and maybe I was confused.

Some FTA receivers (especially ones destined for the hacker market) do handle DishNetwork SW-21 and -21X switches just fine.
They operate on a different principal than real 22khz switches.
The latter rely on a low voltage (maybe 1/2 volt AC) 22khz tone being either ON or OFF to select which of two inputs pass to the output.

Ecoda 22khz two input switches are quite robust and have extra capability beyond run-of-the-mill 22khz switches.
They will pass the 22khz tone through, so you may follow these switches with more diseqc switches, and THEY will function, too.

Since many FTA receivers with OEM firware will not operate DishNetwork switches of any sort, I would discourage their use.
Yes, we have members using the. However, as a general solution, I wouldn't go there.
Make up your own mind.

I hope this helps simplify a very confusing situation.
I not, we'll go at it 'till it's clear! - :up

 

[Phottoman]

Thanks Anole, I 'think' you answered. I wasn't intending to use 22KHz, I was only wondering if this was "NORMAL" and that I can use these without using 22KHz.

CAN I? (smile)

Photto

 

[meinename]

Note: I'm talking about Dish Network SW21

When your receiver supports SW21 and the like, it's a great addition to your arsenal of switches.
They pass DiSEqC commands and 22kHz tone, but like uncommited DiSEqC 1.1 switches, receiver support is sketchy.
EDIT: When your receiver supports them, they work just as reliably IME as any other switch. YMMV /EDIT

Thankfully my Geosatpro DVR-1100c does support SW21.

From what I've gathered reading here and other places, actual SW21 operate on a 21kHz tone instead of a 22kHz tone.

From playing with my Coolsat (which does not support SW21 without hackware), turning tone off or on and changing from 18V to 13V- at the same time- is enough to cause a switch

 

[Anole]

Sorry, I was continuing to edit my post above, while you guys were posting.

In the DishNetwork world, an SW-21 was a old (legacy) 2-input, 1-output switch.
Likewise, a DP-34, was DishPro (bandstacked) 3-input, 4-output switch.
Not an imaginative naming convention, but a practical one.

Looking through my bookmarks the other day, I found a site I'd saved long ago , which explained how the legacy switches from DishNetwork operated.
I believe they pulsed the voltage, or switched it between two levels.

edit: here ya go - http://www.compendiumarcana.com/dbsindex.aspx

 

[Phottoman]

I have NO hackware on this receiver. I bought it with the purpose of TFTA. I burned out a couple of switches, one was flooded and the other I 'forgot' to turn off the power from the receiver at the back.

I still don't know if I can use these switches without 22KHz.

The CNX DUO DOES support several switches, 22, 44 and I believe 64, but those are numbers off the top of my head. They are listed in a drop down menu in the setup procedure for EACH sattelite prior to scanning.

I love my DUO but it is painful for blind searching, takes an average of 45 minutes to blind scan, so I have had to learn how to use Channel Master (snicker)

Photto

 

[Phottoman]

Thanks, guys, I have to go, but I'll check in the morning. Your info has been and continues to be extremly helpful.

Photto

 

[Anole]

If your receiver supports SW-21 DishNetwork switches...
... and you only need two inputs...
... they'll work.
And are very hearty and reliable.

 

[Smith P.]

Note: I'm talking about Dish Network SW21

When your receiver supports SW21 and the like, it's a great addition to your arsenal of switches.
They pass DiSEqC commands and 22kHz tone, but like uncommited DiSEqC 1.1 switches, receiver support is sketchy.
EDIT: When your receiver supports them, they work just as reliably IME as any other switch. YMMV /EDIT

Thankfully my Geosatpro DVR-1100c does support SW21.

From what I've gathered reading here and other places, actual SW21 operate on a 21kHz tone instead of a 22kHz tone.

From playing with my Coolsat (which does not support SW21 without hackware), turning tone off or on and changing from 18V to 13V- at the same time- is enough to cause a switch

Nope.

By Kevin Timmerman:
"Commands are sent in asyncronous NRZ form using the LNB polarization voltage. A logic zero is 13 volts (odd/rhcp), and a logic one is 18 volts (even/lhcp). The data rate is 125 bps (8 ms per bit). A start bit is followed by 7 data bits. There is no parity or stop bit."

 

[meinename]

So explain this P. Smith:
I have 2 LNB's; a Geosatpro UL1 on 129W and a Gilat LNB on 123W Vertical

I switch from 123W 11800 V (13V,22kHz off) to 129W 11964 H (18V,22kHz) twice to switch from Dish 1 to Dish 2

Why does that work?

 

[Smith P.]

I don't know for sure - I'll need look inside of your switch.
But regardless of that - not 21 KHz or 22 KHz tone will control Dish SW21 or any Dish SWxx switch.