8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes : Forum / topic http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2008 Rickey's World contact@nospam.com (Ajay Bhargav) contact@nospam.com (Ajay Bhargav) Wed, 07 Jan 2009 12:39:42 -0800 Wed, 07 Jan 2009 12:39:42 -0800 http://backend.userland.com/rss e107 (http://e107.org) 60 Search Search 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes query http://www.8051projects.net/search.php detect tv channel frequency http://www.8051projects.net/forum-t2214.html

tnx in advance]]> Wed, 12 Sep 2007 02:35:34 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html
Radio Frequency Spectrum
Frequency Use Cable TV Use
3-9 KHz not allocated
9-14 KHz long range navigation
14-535 KHz an assortment of fixed and maritime mobile radio, radio location, radio navigation, maritime radio navigation, aeronautical mobile, aeronautical radio navigation and mobile radio
535 KHz - 1.6 MHz AM broadcasting
1.7-54 MHz various amateur bands, shortwave broadcasting, industrial, scientific and medical usage, CB radio, and mobile radio
54-72 MHz TV channels VHF 2, 3, 4 Ch. 2-4
72-76 MHz Aeronautical navigation and astronomy
76-88 MHz TV channels VHF 5, 6 Ch. 5-6
88-108 MHz FM broadcasting Ch. 95-99
108-135 MHz aeronautical navigation and communication 120-174 MHz
Ch. 14-22
135-144 MHz space research, land mobile radio
144-148 MHz amateur radio
148-174 MHz land mobile radio, government fixed mobile, paging services
174-216 MHz TV channels VHF 7, 8, 9, 10, 11, 12, 13 Ch. 7-13
216-470 MHz an assortment of land mobile, amateur radio, government fixed and mobile radio, aeronautical, and marine radio 216-648 MHz
Ch. 23-94
470-608 MHz TV channels UHF 14 through 36
608-614 MHz space operations (there is no UHF 37)
614-806 MHz TV channels UHF 38 through 69
806-890 MHz cellular telephones
890 MHz - 3.5 GHz an assortment of radio location, land mobile and paging, aircraft navigation, amateur radio, aeronautical satellite, space observation, microwave ovens and maritime radio
3.5-4.8 GHz C band (Anik B, D, E) satellite downlinks
4.8-5.8 GHz various radio navigation
5.8-7 GHz C band satellite uplinks
7-8.5 GHz various uplinks and downlinks
8.5-10.7 GHz various radio navigation and location, including police radar
10.7-12.2 GHz Ku band (Anik B, C, E) satellite downlinks
12.2-12.7 GHz maritime radio navigation, and direct broadcast satellites
12.7-14.5 GHz Ku band satellite uplinks
14.5-275 GHz various EHF (extremely high frequency) allocations, many of them satellite usage
]]> contact@nospam.com (Ajay Bhargav) Wed, 12 Sep 2007 03:11:14 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html SHYAM wrote ...

can any body please suggest me a method to determine the frequency of a tv channel without changing the hardware of televesion??


tnx in advance


What do you mean by.. without changing the hardware? Please explain clearly..]]> contact@nospam.com (Ajay Bhargav) Wed, 12 Sep 2007 03:49:56 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 11:21:35 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html ]]> contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 11:35:27 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html now i want to do it without opening the tv.]]> contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 12:05:32 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html
And... you can test this thing also using an FM radio as TV frequencies start from 55-68Mhz something.. and FM works from 88MHz, so if you're lucky you can listen to a channel sound..
actually i did this experiment with my CAR radio.. and it works
TV was on at that time ]]> contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 14:33:08 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html SHYAM wrote ...

i have detected the frequency

of channel frequency? ]]> contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 13:38:08 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html Ajay wrote ...

TPS you are a moderator.. you should not talk about cracking stuff and all

sorry , i used word "crack" instead of information i have corrected the post ]]> contact@nospam.com (Ajay Bhargav) Thu, 13 Sep 2007 13:47:51 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html contact@nospam.com (Ajay Bhargav) Fri, 14 Sep 2007 11:18:48 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html I have obtained a project from a leading tv serial company,
they want to place my device along with the tv set, in the homes of
people of different sectors of society.
now i have to use the device as a data logger and record the channel frequency that is being tuned
at various time.
as i already said the first part has been done by placing an rf probe over the tuner card ,inside the tv, now i wanna do it without opening the tv.
]]> contact@nospam.com (Ajay Bhargav) Fri, 14 Sep 2007 14:14:23 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html and whatever i explained in my last post is actually for cable TV. But why SHYAM is behind all this? please tell us about your project.. ]]> contact@nospam.com (Ajay Bhargav) Fri, 14 Sep 2007 12:31:14 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html nice..
shyam.. this site is for students i never discuss company projects ]]> contact@nospam.com (Ajay Bhargav) Fri, 14 Sep 2007 14:54:28 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html but i am ready to make the project open right from the hardware to the software part.
may be some of the students too would find it interesting.
moreover this is totally my idea , no committment as such to the company.
All i want is to make this thing work.]]> contact@nospam.com (Ajay Bhargav) Sat, 15 Sep 2007 11:59:39 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html well must say... your project is interesting.. and its good to log which channel is being watched more and at what time good statistical tool]]> contact@nospam.com (Ajay Bhargav) Sat, 15 Sep 2007 12:11:24 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html the probe is working fine when placed above the tuner card of tv
1189887533_2984_FT2214_rfprobe.pdf]]> contact@nospam.com (Ajay Bhargav) Sat, 15 Sep 2007 13:18:53 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html the input is to the adc and the voltage can be decoded to get the actual frequency detected.

if it is required i can post the 51 cpu schematic too
]]> contact@nospam.com (Ajay Bhargav) Sat, 15 Sep 2007 13:23:18 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html hey i will add this completed project in the site.. of course with ur name ]]> contact@nospam.com (Ajay Bhargav) Sat, 15 Sep 2007 13:34:27 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html my problem is still not solved ,
by (schematic submitted) the rf probe,
i can detect channel frequency but the probe has to placed inside the tv over the tuner card.
how can i do it from outside the tv??]]> contact@nospam.com (Ajay Bhargav) Wed, 19 Sep 2007 08:53:48 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html check if its showing you some results!?!

do you have a PCB for this probe?]]> contact@nospam.com (Ajay Bhargav) Wed, 19 Sep 2007 09:15:58 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html i'll see and post the pcb ...]]> contact@nospam.com (Ajay Bhargav) Wed, 19 Sep 2007 09:21:17 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html 1190219077_2984_FT2214_rf_probe_layout.pdf]]> contact@nospam.com (Ajay Bhargav) Wed, 19 Sep 2007 09:24:37 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html
well if you are using cable TV line, then it will be hard to find which channel is tv tuned to. We need to find another way..]]> contact@nospam.com (Ajay Bhargav) Wed, 19 Sep 2007 10:08:46 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html if u think set top box will be easier,
we will do it that way.

]]> contact@nospam.com (Ajay Bhargav) Thu, 20 Sep 2007 00:01:38 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html But if its a higher frequency and out of range of probe? as its not VHF/UHF its coming direct from satellite and receiver is at the dish, you will only get the IF frequency
am i confused? ]]> contact@nospam.com (Ajay Bhargav) Thu, 20 Sep 2007 00:33:05 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html i have tested the probe with cable tv.....
i am still trying with the set top box...
i'll let u know the progress soon.
till then cant i just catch the frequency of the channel from outside the tv box?,
even detecting frequency of horizontal sync pulses would do..
is there a way i could amplify the gain of the probe??]]> contact@nospam.com (Ajay Bhargav) Thu, 20 Sep 2007 04:19:52 -0700 http://www.8051projects.net/forum-t2214.html Re: detect tv channel frequency http://www.8051projects.net/forum-t2214.html ]]> contact@nospam.com (Ajay Bhargav) Thu, 20 Sep 2007 04:25:51 -0700 http://www.8051projects.net/forum-t2214.html