By Jason Morris

Analogue is the process of taking an audio or video signal and then turning it into electronic pulses. Digital is the process of turning the signal into a binary format, represented by a string of 1’s and 0’s. Analogue technology has been around for a long time now. It really isn’t that complicated and is fairly inexpensive. The problem with analogue signals lies in their size limitations regarding the amount of data they can carry.

Because of the way digital works by breaking a signal into 1’s and 0’s and then re-assembling it exactly at the other end, it gives you clear and distortion free cordless conversations. A digital signal knows what it should be when it reaches the other end, through the arrangement of the binary code. This means it can correct any errors that may have occurred during the transmission of the data (signal). All this means that in most cases clarity of the signal is maintained, offering distortion free telephone conversations or clearer television pictures.

Digital technology is also more compact, allowing you to cram much more data into the same space as an analogue signal, meaning more features can be crammed into the digital signal. Though digital signals offer great clarity, they don’t always offer the same rich sound quality as analogue for now.

Cordless phones

Because of the way digital works by breaking a signal into 1’s and 0’s and then re-assembling it exactly at the other end. It gives you clear and distortion free cordless conversations. Digital cordless phones also encrypt the binary data during transmission, making your call safe from eavesdroppers. With digital more power can be applied to the signal allowing you greater range on cordless conversations.

If you are in a small office or in your home, it may be that you don’t require a big range and security isn’t an issue, in which case you may find that a cheaper analogue cordless system will fulfil your needs. Check out the features at the end of this article to help you decide if a digital cordless phone will benefit you. You will need to keep in mind that when using digital or analogue signals for cordless phone calls, the handsets themselves are still analogue devices that can only be used on analogue lines. Also the range of your cordless phone, whether using analogue or digital signals will always depend on the environment in which you are using it.

Phone systems

When considering which type of phone system is best suited to your business, digital or analogue. Many companies are now choosing hybrid systems, which allow you to use both digital and analogue peripherals, giving you the benefits of a digital system while offering the flexibility to implement any existing analogue equipment.

Benefits of digital and hybrid phone systems

1. Computer Telephony Integration (CTI) – Digital systems allow better implementation of Desk Top Assistant (DTA) software.

2. Allow you to integrate your telephone system with your computer network.

3. Offers greater clarity of call signal (no distortion).

4. Easily adapts to the use of DECT cordless technology, giving your employees the freedom to roam, while still receiving a clear distortion free signal.

5. Allow better integration with advanced features such as voicemail auto attendants and other call handling features.

Benefits of digital handsets

1. Allow better integration of advanced features such as voice mail and auto-attendants.

2. Offer greater internal memory for better call handling.

3. Caller Line Identification (CLI). Allowing you to view the identity of any callers before answering the call.

4. Offer clear distortion free calling.

5. Offer high capacity name and number directories.

Benefits of digital (DECT) cordless handsets

1. DECT cordless offers increased range over analogue sets. Up to 50m indoors and up to 300 outdoors, which can be increased with the use of strategically placed repeaters.

2. DECT cordless offers better security through signal encryption, stopping eavesdroppers.

3. Offer clear distortion free calling.

4. Allows the use of extra handsets without the need for extra wiring.

5. Calls can be transferred between handsets.

6. Caller Line Identification (CLI). Allowing you to view the identity of any callers before answering the call.

7. Offer high capacity name and number directories.

By Jon Martin

In the world of digital audio, there are two types of cable to choose from; optical cables which use light to transmit signal and digital coaxial cable. These audio cables will enable your home theater system to transmit digital data between components. This will provide you with superior sound quality over typical RCA audio cables.

How Digital Coaxial Cable Works

Digital coaxial cables employ the same principles as other coaxial cables. The inner conducting layer is surrounded by an outer conductor as well as the rubbery insulating layer outside the cable. The digital signal is sent through the inner conductor as it travels between components. During the course of its transmission, the signal routinely comes in contact with the outer conductor. The outer conductive layer is created with materials that act as a reflector for the signal, thereby bouncing it back off of its surface. The signal will continue to reflect within the confines of inner conductor until it reaches the receiving component.

Dedicated to Digital Audio

Digital coaxial cable has only one purpose; to deliver digital audio between components. This is in complete contrast to RF coaxial cable which transmits both video and audio along the same path. As you may suspect, dedicating the entire bandwidth of the cable to sending only digital audio has excellent ramifications for your home theater’s sound quality. This practice results in greater signal fidelity between the transmitting device and the receiving component. Greater signal fidelity means that the sound you hear from your home theater speakers will be truer to the way the sound was originally recorded.

Benefits of Digital Coaxial Cables

Digital coaxial cable also has another benefit related to its dedication to digital audio. In the manner that signal transmission usually takes place, the digital signal from the source, a DVD for example, is sent to a digital-to-analog converter (DAC). The signal is converted to analog and sent through the given cable where it reaches the receiving component on the other side. This component uses an analog-to-digital converter (ADC) to reconstruct the digital signal as closely as possible. During this process, errors and variations can be introduced to the signal resulting in audible artifacts and distortions that diminish your home theater’s sound quality.

Unlike with other audio cables, digital coaxial cable can transmit digital signals along its length without the need to convert to analog. Digital coaxial cable is capable of by-passing this process and delivers a cleaner signal to your home theater receiver.

Applications of Digital Coaxial Cables

Connections for digital coaxial cables can be found on everything from DVD players to home theater receivers. If it uses digital audio, then chances are there is a manufacturer who has made that component with digital coaxial cables in mind.

by: Digital Man

My Sony Hi-MD (mini disc) kicked the bucket somewhat prematurely. It chews and chews on a disc without engaging. I suppose the mechanism got mangled on one of my trans-Atlantic flights. I had to drag myself into the modern recording age and invest 300 quid in a flash recorder, AND stump up another 25 for an SD memory card. And do you know what? It was worth it.

The Edirol R-09 by Roland of seventies synthesizer fame won’t win any prizes in a beauty contest. It looks more like an electric shaver than a digital recorder – but that hasn’t stopped me falling in love with it. I’m suspicious of in-built microphones, but those silver grills on the top are pretty good – fine for journalistic notes at any rate. The plastic record and play buttons are big and chunky, but they are dead easy to use without reference to the manual. Even someone like me who is all thumbs and struggles to send a text message can use them with ease. There are buttons on the back for mono or stereo, automatic recording levels, etc. Volume controls are on the side. In other words, you can do most things without scrolling through a menu on the LCD screen. Transfer of sound onto the laptop is a doddle. You plug it into the USB and it becomes an external disc. I just open up SoundForge on my computer and start editing away. I have a 2 Gig SD card so it holds several hours of audio.

And what about the quality? It records in mp3 or WAV, the latter being uncompressed and very high quality indeed. It’s 24 bit, which is ample. You might want more bits for recoding the Boston Philharmonic, but short of that it will do for most things. I find it works best with my microphone routed into the sound mixer via the Line In. When I plugged my Sure SM58 directly into the R-09 I got a certain amount of hiss. Not much, but discernible. Perhaps the impedance does not quite match (or some such technical guff). Edirol recommend buying one of their own external condenser mics, but they would say that, wouldn’t they. I might try a transformer. I would hate to buy yet another mic for out and about interviews, but it might come to that…

About The Author

Digital Man, a sales manager of Gigasonic, has more than 10 years experience dealing with music gears.

For more information and products, go to http://www.gigasonic.com.