Glossary D-F

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A satellite television dealership, consumer electronics retail outlet, or a local distributor who sells the DIRECTV System and DIRECTV programming services to consumers.

A decibel is a unit of measurement. Decibels use a logarithm to allow very large or very small differences between to two values to be represented in small numbers. In Electronics, a decibel can be represented as dBm for measurements of micro watts. Zero dBm is the representation for 1 milli watt of signal power. For every 3 dBm increase in signal power the actual milli watt increase is about double. All splitters, amplifiers, coax cable ect.. used with satellite and television signals have specifications which state signal losses, or increases using the dB unit of measurement. A signal level measuring 6 dB is twice as strong as one measuring 3dB and half as strong as 9dB.


Direct Broadcast Satellite (DBS):
The signal frequency range (11.70-12.40ghz) intended for direct TV broadcast by satellite TV program providers. DISH Network, DirecTV and Pegasus are all DBS satellite TV systems.

Digital Satellite System, also a common name used to refer to a DirecTV satellite system or component.

Digital Compression:
A process of translating video images into a digital code which takes up less transmission space than the original signal would have. This allows more channels per satellite transponder: from four-to-one for live video to eight-to-one for film.

Directional Couplers.


DirecTV, Inc.
A subsidiary of Hughes Electronics Corp. that is responsible for developing, implementing, and managing the infrastructure and programming for the DirecTV System.

DirecTV System:
The trademark name for the consumer hardware created to receive DirecTV programming. The hardware includes a dish (standard size is 18"), a remote control, and the DirecTV Receiver.

DirecTV Receiver:
A satellite receiver used to receiver DirecTV programming. There are several manufactures of DirecTV receivers.


See DirecWay

DirecWay is the new name for the DirecPC satellite internet access system offered by Hughs Networking. The system utilizes geostationary satellites to provide speeds up to 400Kbps (much higher is typical but 400Kbps is the maximum advertised speed). A 3 foot dish is used along with a USB modem.


UPDATE: As of 3-1-06, Direcway is now HughesNet. The service and equipment are the same, only the name has changed. For more information please our HughesNet section.

DiSEqC™ (Digital Satellite Equipment Control) system, which is a communication bus between satellite receivers and peripheral equipment using only the existing coaxial cable. DiSEqC™ can be integrated into consumer satellite installations to replace all conventional analogue switching, providing a standardized digital system with nonproprietary commands and enabling switching in multi-satellite installations.

DISH Network:
The trademark name of Echostar, Inc. for its DBS Satellite TV system and programming.

DISH Network System:
The trademark name for the consumer hardware created to receive DISH Network programming. The hardware includes a dish (standard size is a 20" multi-sat dish, called DISH 500), a remote control, and the DISH Network Receiver.

DISH Network Receiver:
All DISH Network receivers are manufactured by Echostar Corp.. Some units are made for JVC and they do differ slightly, but they are still the same.

DISH 500:
A multi-satellite dish used to receive DISH Network programming. Some programming for DISH Network is only available if you have a DISH 500 dish or a 2nd single satellite dish pointed to the 110 satellite for DISH Network. The DISH 500 dish is used to receive simultaneous satellite signals from the 119 and 110 satellite slots. The use of the number 500 is misleading. While the multi-sat dish can technically receive 500 channels, most of those channels are local networks from other cites. Since you can't subscribe to those channels you do not have access to 500 channels. For more information about Multi-Satellite dish options from Dish Network and DirecTV, go here.

DISH PRO technology is used by DISH NETWORK. All Dish Network receivers since early 2002 are DISH PRO ready. The DISH PRO technology uses a 1 Ghz bandwidth at 950 to 1950 Mhz to transfer the satellite signal from the LNBF to the receiver. The LNBF voltage is fixed at 19 VDC. DISH PRO uses DiSEeqC controls to communicate with the LNBF for multi-satellite selection. DISH PRO compatible receivers will also work with standard LNBS. Adapters are available to convert DISH PRO signals to standard signals for incorporating non DISH PRO compatible receivers into a DISH PRO system.


Dolby Digital / AC-3 Compatible:
Dolby Digital provides 6 independent sound track channels through the optical output jack. When connected to your AC3 compatible home theater audio setup, this connection provides Dolby Digital Surround Sound (when Dolby Digital is part of the programming being viewed).

Dolby Pro Logic:
Dolby Pro Logic (known as Dolby Surround in the theaters) is based on the use of an amplitude-phase matrix. This is a method of encoding four channels of information into two tracks of stereo media and then decoding them back into four channels for playback.

Direct to home. Official term used by the Federal Communications Commission industry to refer to the satellite television and broadcasting industries.

Dual LNB:
A dual LNB has two coax connections. You can operate up to two satellite receivers with a dual LNB. Do not confuse this with a dish that has room for two LNB's.

Digital Video Broadcast standard for digital radio and television, using MPEG2 compression. DVB is being supported by all European manufacturers and broadcasters.

The company that owns and operates DISH Network.

Electronic Program Guide (EPG):
A chronological listing of all available programming covering an extended time period (typically 36 hours or more). This listing displays on your TV screen.

The upward tilt to a satellite dish antenna measured in degrees required to aim the antenna at the communications satellite. When aimed at the horizon, the elevation angle is zero. If it were tilted to a point directly overhead, the satellite antenna would have an elevation of 90 degrees.

The separate functions of a satellite receiver that may make one satellite TV system more appropriate for your requirements over another. It is important that satellite TV shoppers understand what the different features are and how they may be needed to create a perfect installation for the shoppers needs. Many features are unknown to shoppers and often new satellite TV dish owners learn to late what they features they should have been looking for. Here are is a list of the most common over looked features when purchasing satellite TV systems.
Digital Dolby A/C-3
Oval Dish
UHF Remote


Feed Horn:
A device which collects the signals at the focus of the satellite dish and channels them to the LNB.

An area of the earth that the signal transmitted from a communications satellite is able to reach with a usable signal. The footprint depends on the satellites beam.


Frequency is a measurement of the number of complete waveform repetitions that pass a given point in given time-period. It is expressed in Hertz (cycles per second).




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