Signal Loss
When your system loses the satellite signal, you cannot watch programs. Causes of signal failure apart from a failing LNB embody the signal being blocked by a storm, tree growth or a building created in its path; wind or another anomaly moving the dish out of alignment; or a defective cable from the dish to the receiver. while not a diagnostic system, you want to troubleshoot to seek out the matter. however AN elaborate diagnostic system might report if there have been no signal into the LNB from the satellite, a failing LNB or a foul cable association, creating the matter easier to seek out.

Receiver Tests
The options of satellite receivers vary with value, quality and time, with new styles often upgrading the nosology, that tend to be a lot of thorough as time goes by. several receivers have a system check feature that you just go past choosing it on the remote. If the system has any issues, it reports them on the screen in plain English or in error codes that you just should decipher from the user's manual. Some show a selected error message or code if the LNB has failing.


LNB Operation
The reflector portion of a satellite dish concentrates the received signal into the LNB just like the reflector on a electric lamp operating in reverse. the primary filter within the LNB removes unwanted signals that would cause interference. Then a coffee noise preamp amplifies the signal to a a lot of usable level. a neighborhood generator produces a frequency that mixes with the received signal to supply AN intermediate frequency. A second filter removes any noise created by the heterodyne oscillator, and a second electronic equipment boosts the IF to the next level to travel into the receiver.

LNB Fails the check
If you run a system check on a system that has diagnostic news and it tells you the LNB has failing, you want to replace the LNB. Most satellite systems embody warranties and repair agreements, and you would like solely decision the service supplier. otherwise you might replace it yourself if you've got the ability. Most LNBs return as one unit with no user interchangeable elements within. you will send a defective LNB to a repair facility or purchase a brand new or restored one.
The DBS Band
The direct, or digital satellite broadcast band, utilized by broadcast corporations may be a sub-band of the Ku-band that encapsulates frequencies from twelve to eighteen gigacycle per second. DirecTV in conjunction with the Dish Network use this waveband to deliver their signals to alittle satellite dish placed at the subscriber's home. Their satellites orbit with the world during a orbit. The belt the satellites operate from, Clarke’s belt, is called once science-fiction author Arthur C. Clarke, UN agency 1st wrote regarding the fixed orbits of satellites during a 1945 technical paper.

The Remote Frequency
DirecTV subscribers management their tv and therefore the DirecTV from a distance employing a remote. relying upon the receiver and therefore the remote, the waveband to use the remote may well be within the spectrum or operate employing a frequency. Infrared needs the user to purpose the remote directly at the unit, whereas a frequency remote doesn’t need an instantaneous “path” to the receiver to perform. The DirecTV remotes operate within the 418 to 433 megacycle per second bands.


Cables
The cables that connect the DirecTV receiver to the antenna should conjointly meet the frequency specifications to hold the signal. DirecTV needs RG6 cable with associate seventy five ohms ohmic resistance and signal losses at 950 to 1450 megacycle per second. The RG6 cable operates inside the frequency ranges necessary to hold the digital signals from the dish to the receiver.

FCC necessities
The Federal Communications Commission regulates and controls the “air-waves” and allocates frequency bands consequently. DirecTV receivers constitute Title fifteen Device category B devices. Devices underneath this classification should accommodates Federal Communications Commission laws and not operate outside the frequency bands assigned .
High Definition Digital Video Recorders
The HD DVR receiver offered by DirecTV comes with a USB port on the rear of it – as of the time of publication, DirecTV documention states that the port is presently reserved for future use. It operates with USB two.0 Host 5V = 500mv. it'll settle for associate iPod or USB organized cellular phone hookup to charge these units, however aside from that, it serves no operate at the time of publication. Output jacks embody digital optical, digital coaxal, 2 RCA stereo and one RCA. Video output includes HDMI, component, and S-Video, 2 composite RCA jacks and an extra composite RCA jack. alternative hookups embody 2 satellite in jacks, an enclosed RF antenna, a front USB, a back USB, a Ethernet, associate eSATA port and a jack.

Features of DirecTV Digital Recorder Receivers
Other options of the DirecTV DVR receivers embody the power to pause and rewind live TV for ninety minutes, YouTube visual display unit on the tv once organized with an online association, instant replay, integration with Facebook or Twitter, keyword program search and therefore the ability to program your DVR from anyplace mistreatment your cellular phone or pc. Most DirecTV receivers escort the additional USB port on the rear of the receiver.


Increased Recording capability
The USB port isn't a association for adding associate external drive. DirecTV provides a special port on its high-end digital video recorders mistreatment serial advanced technology attachment or SATA association technology to attach specific suggested laborious drives. This eSATA port is that the port to use rather to attach to the external drive for added storage of recorded programs. this selection isn't on the market on all receivers.

Connecting to the web
DirecTV provides associate choice for subscribers to feature DirecTV Cinema, that permits observance of films on demand through a subscriber's current net access. This includes observance simply free movies on the DirecTV network and choosing from their video library of over half dozen,000 films. This application might need an extra piece of apparatus and charges to access these options.
LNB Parts
An LNB has many elements. associate degree input filter assures that solely signals from satellites enter the LBN. The low noise pre-amp amplifies the satellite signal to a usable level. a neighborhood generator associate degreed mixer down-convert the signal to an intermediate frequency that carries the television channel info. The output filter removes any unwanted signals that will cause interference, and a final electronic equipment will increase the IF to a additional usable level to travel through the cable to the receiver. The output power of associate degree LNB depends upon the strength of the signal received and therefore the style of the LNB.

System LNB Testing
Numerous television system systems put in by service suppliers like Dish Network and DirecTV have system tests that reveal a unsuccessful LNB. the method of testing a system depends on the model of the receiver, however the user's manual illustrates a way to fuck. Your TV screen shows the results of the system take a look at. If the LNB isn't functioning properly, a message can show that clearly says thus. Run a system take a look at exploitation your remote. If a defective LNB message seems, decision your service supplier to send a technician. Service is sometimes enclosed in your subscription worth.


LNB Tester or Meter
Use a meter to check the facility of the signal kicking off of associate degree LNB. a typical frequence meter can show the extent dBm, however it needs external power to control. The meter may additionally  be big-ticket. the facility output ought to be from -80dBm to -25dBm. Smaller, more cost-effective meters designed for home satellite systems connect between the LNB and therefore the receiver. The LNB gets the voltage required to control the electronic circuits from the receiver through the cable. associate degree LNB in-line tester uses this power. Install it between the present cable and therefore the LNB to scan the amplitude.

Replacement
If you have got no resources to perform a system take a look at, or to ascertain the output with a meter, replace the LNB. Check the come back policy for associate degree LNB at a neighborhood satellite dealer or physics store. If you get a replacement one to interchange the one in question, you will be able to come back it for a refund if it does not fix the matter. See your satellite manual for replacement directions. Satellite dishes could also be put in in precarious locations, and accidents will cause injury or death. If you do not have expertise, decision knowledgeable technician to check or replace the LNB.