Interested to Buy Any Domain ? << Click Here >> for more details...
Why we use vestigial side band (VSB-C3F) transmission for
picture?
- 16 Answers
- 69158 Views
- BPL, I also Faced
- E-Mail Answers
Answer Posted / abdul hamid
The video baseband signal used in TV in countries that use
NTSC or ATSC has a bandwidth of 6 MHz. To conserve
bandwidth, SSB would be desirable, but the video signal has
significant low frequency content (average brightness) and
has rectangular synchronising pulses. The engineering
compromise is vestigial sideband modulation. In vestigial
sideband the full upper sideband of bandwidth W2 = 4 MHz is
transmitted, but only W1 = 1.25 MHz of the lower sideband is
transmitted, along with a carrier. This effectively makes
the system AM at low modulation frequencies and SSB at high
modulation frequencies. The absence of the lower sideband
components at high frequencies must be compensated for, and
this is done by the RF and IF filters.
| Is This Answer Correct ? | 6 Yes | 2 No |
Post New Answer View All Answers
What are the characteristics of scr?
What frequency bands are used in satellite communication?
What is race around condition in a jk flipflop? How it can be avoided?
Difference between mobile and a cell phone.
Define amplifier.
what is orthogonal code of 0
What is meant by trc?
I am selected for interview jr executive(electronics)in AAI.i have the interview on 13th october2010.please anyone send the requirements and share the interview details who had completed.if u have any details plz send to srikkanth.283@gmail.com r @09491955876....i'm in tense.....
Define what happens to the conductivity of semiconductor with the rise in temperature? Compare with the conductivity of metals.
Explain to find resistivity?
What is an analogue circuit? Explain with an example.
why we don't use photodiode in forward-bias?
What is the protocol ?
Explain what is a truth table?
flow chart to convert binary number into decimal
