Analog Digital Converters Interview Questions 

Why is a 12-bit analog-to-digital converter satisfactory for most laboratory measurements?

 

I don't understand in the terms like why 2¹² = 4096 quantization levels be enough for a laboratory measurements.

 

I recently received a 32" TV that is "HD-ready" aka without a HD-tuner. Im wondering when I go to college and hook up the coax cable am i going to get any digital stations at all? and if not is there a way / something i can get to recieve them through cable? To my understanding is the coax into the tv is analog so my first bet would be i need a box.

I'm thinking of buying a DTV converter box & I'm wondering if I'll have to buy a new indoor antenna for reception of my local channels. Most of them in analog have slight ghosts and channel 19 has minor snow. The only channel I can pick up clearly (no interference or distortion) is channel 5, which is in UHF for digital. Will I have to buy a new antenna or can I get by with my RCA unamplified UHF/ VHF/ FM indoor antenna?

An analog signal is sampled and modulated to a digital one.
When doing the reverse process(demodulation) how is it accurately done so that using the digital signal we get back the original analog signal without data loss?

I understand the new CAGE CODE to be a code given to certain government, and retail 'entities' to protect their location... I have not looked into it further, but it seems fishy...but like I said I have not looked into it further. I found this term when I was going through the dtv2009.gov site to get a coupon for a free converter box for the upcoming change in feb of 09 and when I typed in my question of , " ...will analog signals transmitted from remote locations for tv broadcast be changing to digital broadcasts...?"
This is when CAGE CODES were mentioned on the screen.

In an attempt to set up my analog TV(s) for the upcoming switchover I have bought my alotment of A --> D converter boxes and a couple of new outdoor antennas.

I am trying to tune my antennas for best signal reception and have aimed them according to my street address and local NY metro broadcasters using antennaweb.org.

I still cannot reliably receive a couple of my major network affiliates, CBS, ABC AND most IMPORTANTLY PBS.

I have a couple of questions:

1. Come Feb 2009, will the broadcasters boost the power output of their digital signal? as they will no longer have to broadcast in analog?
2. Is there a NAB section where the NYC metro broadcasters publish their power output / transmitter locations so I can make sure to point the antenna(s) perfectly?
3. What other methods can I use on the receiving end to boost my digital signal received from a couple of outdoor antennas?

I am fiddling around NOW when the weather is GOOD.

Thanks for any / all answers...........

We recentley ended our direct TV service but still have two of the standard boxes. Now with the analog tv switch coming soon could we use those boxes as a digital tuner or do we need to by one of those converter boxes. If not what can we do with these boxes as we own them.

1) I have [Comcast] basic cable (the one you don't need a cable box for, and have 60+ channels on it). But I want to connect my cable coaxial line into my DTV converter Box. "I know I don't need that box seeing that I already have cable" [and its digital], BUT for other reasons I need to connect my cable to that box.

Anyone know if I decide to get one of these dtv converter boxes and plug in my cable into it, will it work? Will I have cable while viewing it in my TV.

2) ALSO, I know February 2009 is the deadline for the old analog signals to be done with on certain TV stations, BUT has the transition already started, Are some stations already broadcasting the new signals or do they tart till February 2009 to?

how can i find out what it all means?
i dont want to spend hundreds of £s &end up buying the wrong one.

the site doesnt give a glossery of words so i dont no what any of it mean :'(

4 example it would say:

Premium 24-bit/192kHz A/D and D/A converters (A/D: 113dB SNR, D/A: 117dB SNR) deliver unmatched USB audio fidelity
E-MU XTC Class-A ultra-low noise Mic/Line/Hi-Z preamplifiers (-127dB EIN) with 48V phantom power and ground lift switches enable you to plug microphones, keyboards and guitars straight into your computer with professional results, while the built-in analog soft limiting circuit lets you record a hotter signal without fear of clipping
Comprehensive digital I/O with optical and coaxial S/PDIF (switchable to AES/EBU) and MIDI In/Out to easily connect all of your digital studio gear and instruments
Ultra-low latency Windows XP and x64 USB 2.0 drivers offer accurate timing and playback of your recorded audio and software instruments

what does it all mean?

So there is this new law about no more receiving analog or rabbit-eared TV. I was just wondering with the coupons being given away, which is the best tv converter box offered?

* AMTC AT-2016

* AccessHD DTA1010U

* AccessHD DTA1020U

* AccessHD DTA1010D

* AccessHD DTA1020D

* Apex DT1001

* Apex DT1002

* Artec T3A

* Artec T3APro

* CASTi CAX-01

* COSHIP N9900T

* Digital Stream DSP7500T

* Digital Stream DSP6500R

* DigitalSTREAM D2A1D10

* DigitalSTREAM D2A1D20

* DigitalSTREAM DTX9900

* ECHOSTAR TR-40*

* GE 22729

* GE 22730

* Goodmind DTA900

* Goodmind DTA1000

* Goodmind DTA980

* Insignia NS-DXA1



* Kingbox K8V8

* Lasonic LTA-260

* Lasonic LTR-260

* Magnavox TB100MW9

* Magnavox TB-100MG9*

* MaxMedia MMDTVB03

* MicroGEM MG2000

* Microprose MPI-500

* Mustek MAT-K50

* OLEVIA DTA100

* Philco TB150HH9*

* Philco TB100HH9*

How can I connect my LCD monitor which has a DVI input to my video card on my laptop docking station which is vga connector? Do I need to get a adc converter? Or can I just use a converting cable? I know the LCD monitor receives a digital signal and the video output from the card is vga (analog)

I currently live on the third floor of an apartment building in east Fort Worth, Texas, where I've always been able receive several analog stations, albeit with some snow. Recently, I bought a couple of those $40 RCA DTV converter boxes, and they were unable to find any stations whatsoever. So, I bought the most expensive antenna I could find, and I can now pick up analog stations with perfect clarity, but still can't receive any digital signal.

I've noticed that my laptop interferes with reception when it's placed too close to the antennas- could something else be causing similar interference?

Can anyone explain to me, in the simplest terms possible, the dog and pony show the FCC seems to be putting on regarding digital TV after February 17, 2009?
What's the deal with the converter boxes? If you subscribe to digital TV through your cable/satellite provider, whereby you have a set-top box, are you covered?
I have seen the FCC site - and it's more confusing than I thought.
I think they're just putting on a big act, if you ask me.

Any input would be greatly appreciated.

And, yes, I am speaking as an analog TV owner.

I just bought a digital tv so don't need the converter for that. Can I hook it up to work with a VCR so I can continue to record on it as I have been? If so, can someone tell me how, what cables go where, etc? Or email me a diagram? I have a Sansui VCR4510D hooked up to a Sansui DTV1300.

If not, is there a DVR that will let me record 2 programs on different channels at the same time that I can program like my old VCR? (not TIVO -- as I am OTA only with indoor antenna and TIVO says Series 2 won't work with that. Besides, I don't want to pay $14/mo for a tv schedule when I can get one online for free and program manually just like I do now anyway). Thanks.

Does anyone have any suggestions using a vcr (NTSC) with the new coupon eligible DTV converter boxes now becoming available for purchase for use with analog systems (tv, vcr) when OTA broadcast signals convert to all digital in Feb.'09? I assume that the VCR+ system in my vcrs will become useless when this conversion occurs. Someone in another posting said setting the vcr to channel 3 or 4 would allow vcr timer recording from the converter box as long as you make certain it is set to the correct digital channel you want to record. This is problematic though in that these converter boxes all must be Energy Star compliant and must, therefore, power off after a short period of inactivity rendering any kind of unattended timer recording (hours later) useless. I guess the only alternative is to hook the converter box up to a programmable timer to turn on at or slightly before the recording time arrives. Your thoughts? Thanks.