I'd like to get the surround sound to work with cable TV. I've hooked the cable box to the receiver. Do I need to purchase another cable to go from the receiver to the television?
No. The cable box being connected directly into your receiver with an optical cable is the way to get surround sound. And there is no optical sound input on your tv, only an output which sends stereo. So what you have done is correct and finished.
Features: Designed for use with the Aimpoint T-1/H-1 6061 T6 Machined Aluminum construction Matte black blasted and Teflon coated finish Fits AK rifles with receiver side mounted scope bases Quick Detach leverBenefits: Allows for optic to be mounted directly over the centerline of the bore as low as possible Lower 1/3 co-witness is possible with the Aimpoint T-1/H-1 Quick Detach thumb lever allows for mount to be attached or detached from the rifle quickly The lever allows the mount to return to zero each time it is removed Mfg: Rs Products Llc
Connect an audio component to an A/V receiver or speakers using this fiber-optic cable that features graded index fiber with InsuLight cladding for improved signal transfer and a HexMesh jacket for enhanced durability and strain relief.
Flattop upper receiver is forged from high-grade 7075 T6 aluminum for strength and durability then final machined to USGI or better tolerances for building a custom AR rifle. Hardcoat anodized finish minimizes abrasion wear. M4 feed ramp cuts ensure reliable feeding. 13-slot Picatinny rail provides a full 5" for mounting an optic while the etched position numbers in rail slots ensure repeatability of mounting position. Comes with forward assist and ejection port cover fully assembled and installed. Mfg: Daniel Defense SPECS: 7075 T6 aluminum Type III hardcoat anodized matte black. .250" dia. pivot/takedown pin holes.
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PS3 AND XBOX360 OPTICAL SWITCH.(enable you to get 5.1 surround sound on 1 receiver)
How to Design a High Performance Optical Receiver?
The structure of an optical receiver is simple: consisting of just a photodiode to produce the electrical current and an amplifier. But do not be fooled: it is far more complex to design a really high performance optical receiver. So we will talk about some of the criteria of actual receivers.
The are a bunch of factors involved in the process. You have to take into count of signal current noise, noise from the photodiode such as from an avalanche diode, noise from the amplification electronics, thermal noise, dark current and signal to noise ratio for high data bit rate.
How to choose the correct photodiode?
Two major types of photodiodes are commercially available for optical receiver applications: PIN photodiode and Avalanche photodiode.
PIN photodiode
PIN photodiode is an extension of PN diode. But PN diode has many vital flaws. PN diode has too small depletion region which makes the received optical power must be fairly high to generate sufficient current. The second flaw is PN diode's slow response which limits it only to kilohertz applications.
PIN photodiode solved these limitations on PN diode. The depletion region has been made as large as possible and most of the photons absorbed within the depletion region. And the inclusion of the intrinsic layer decreases the function capacity which raises the switching speed and the photon capture area.
The benefit of the improved design is a more efficient opto-electro conversion and faster speed.
Avalanche photodiode (APD)
In a PIN photodiode, each absorbed photon produces one electron hole pair which sets one electron flowing in the external circuit.
But in a Avalanche photodiode, a few incident photons result in many carriers being produced and an increased external current. How does an Avalanche diode achieve this?
This is produced by the phenomenon called avalanche multiplication. What this does is a strong electric field will accelerate current carriers so much that they knock valence electrons out of the semiconductor lattice and with a high enough bias voltage an avalanche of carriers will result.
While all those are good, there are also a dark side on this. While the carriers are amplified, the uneven nature of the multiplication introduces noise as well.
As a conclusion, although avalanche photodiodes are non-linear and fairly unstable, they are very similar to normal silicon photodiodes except that they require a slightly lower operation voltage to achieve good multiplication.
Other critical performance parameters of a photodiode
For your reference, some of the most critical parameters are listed below.
Responsivity
Photodiode responsivity is the ratio of generated current to incident light power. This is usually expressed in Amp/Watt. Sometimes this is also referred to as quantum efficiency.
Dark Current
Dark current is the current produced by the photodiode when there is no incident light at all. The dark current includes current generated by background radiation and the saturation current of the semiconductor junction. Dark current is a source of noise when it is being used in optical communication systems.
Noise-equivalent power
Noise equivalent power is the minimum input optical power needed to generate photocurrent. This equals to the rms noise current in a 1Hz bandwidth.
About the Author
Colin Yao is an expert on fiber optic communication technologies and products. Learn about corning fan bt25
, ribbon fan out
, Spider fan out
on Fiber Optics For Sale Co. web site.
