Receivers with lock lights.

[G4EWJ]

What are the current options for a receiver with a lock light?

Brian

[g8ckn]

Hi

Comtech ATV 23 and 13cm Receivers have lock lights as part of the PIC frequency control circuit.
If it is a signal received indicator you require a Sync Detector could be added.
The modules have a RSSI (signal strength) output available so this could also be used to provide an indicator.

Contact me via antennas@tiscali.co.uk if you need to know more of want Comtech RX & TX Modules

Regards Roy G8CKN

[g4wvu]

I suspect Brian means digital receivers Roy ...... ?

[G4EWJ]

Yes, I should have said digital receivers, but thanks anyway Roy.

Brian

[g0mjw]

Can't you just look at the picture or the constellation or lock indicator on the display? Building a repeater? Anyway, if you are using a Technotrend card I think one of the later versions of Tuitioune has the ability to output a 22kHz tone on detecting a valid Transport stream. Not lock nor lamp but it could be made to light a lamp if you built a 22kHz detector - or perhaps used an audio amplifier A/C coupled feeding an LED.

If you have built one of the USB tuners, the valid signal is on pin 23. http://www.vivadatv.org/viewtopic.php?f=79&t=373 and is used via the 74HC10 to gate the TS to the USB module.

The easiest way without access to the NIM might be to simply look at the TS with an Raspberry PI.

Mike

[g8gtz]

Brian,

I have put a copy of the article on how to generate a Lock indicator on the Comag SL30 in the new BATC wiki here:

https://wiki.batc.tv/Technical_topics_f ... r_builders

The BATC wiki will be released in CQ-TV this month but to quote:

"The BATC wiki is as our reference library where we can all put documents and information we think others may be interested in – so if someone asks you by email or on the BATC forum “have you got a circuit for xyz then, as long as there is no copyright issue, you put it in to the reference library or wiki so everyone can see it.

Does it replace the forum / website? - No, the forum is the place to discuss things and the website is the first landing place for new comers and is used for official information such as the constitution. If the Wiki is the library, then the forum is the coffee shop and the website is the shop window!

The Wiki is primarily designed to store pictures and documents (pdfs) of interest to the ATV community but we will also be using as the place to find software from CQ-TV projects and also back issues of CQ-TV.

Got a scan of a rare equipment manual that others may be interested in, want to start a reference library for all articles on RB-TV or found a load of interesting web links for ATVers – just start a new topic and put it on the wiki....

As well as information of interest to the whole ATV community, we will use the wiki to put BATC specific information such as instructions on how to rest your password, how to stream to batc.tv, how to renew your membership etc and how to use the shop.

Anyone can use the wiki, you don’t have to be a BATC member to read the articles and download the information - we see it as a resource for the worldwide ATV community, but we are currently limiting the ability to edit the content and upload new information to BATC members.

This is your site - any information which you feel is of use to others can be put on the Wiki but please observe any copyright restrictions on your material you use."

[G4EWJ]

Using the TS from MiniTiouner is the way to go. The receiver is a back up.

SL30s seem thin on the ground these days. Does anyone have one spare?

Brian

[M0SKM]

Comag SL30's still on eBay. New from Germany.

I modified two of these for lock light and relay output, GB3TZ 70cm input uses one.

Steve

[G4EWJ]

Thanks Steve.

Brian