C

A major advantage of C-Band over KU-Band is that it is relatively impervious to weather conditions. A disadvantage is that the frequencies are shared with terrestrial microwave, requiring an extensive (and expensive) frequency search to ensure interference-free transmission.

The PRSS operates in C-Band.

1. Generally, the principle upon which all radio transmission is based. A wave of high enough frequency that it can be "radiated" through space which is in turn "encoded" or "modulated" by the program signal which needs to be transmitted.
2. That part of AT&T Long Lines which takes care of installing and maintaining the microwave system which AT&T uses to transmit everything from phone calls to video from city to city.
3. A system used by an increasing number of telcos to transmit anything between local offices. In this case it could be analog or digital. The important thing to remember is that a spec listed for a carrier facility is the maximum you can expect. The same spec listed for a copper facility is the minimum performance guaranteed.

• AAA Full-time 50 Hz -15 kHz
• AA Full-time 50 Hz -8 KHz
• A Full-time 100 Hz -5 KHz
• BBB Occasional 50 Hz -15 KHz
• BB Occasional 50 Hz -8 KHz
• B Occasional 100 Hz -5 KHz (see FABLE)
• C Full-time non-equalized or 300 Hz -3.5 KHz
• D Occasional non-equalized or 300 Hz -3.5 KHz (see DELIN)

The pundits predicted financial ruin for Ted, he's still around and operating multiple satellite-delivered TV Networks including CNN, CNN2 and TNT as well as super station WTBS. He sold his interest to Time Warner for very large $$$$

We use 15KHz codecs built by Northern Telecom for T1 transmission, and codecs built by Corporate Computer Systems (CCS Micro 56, Micro 56+, Micro 66i, CDQ-1000 & CDQ-2000), RE America (RE-660 & 661) and Telos Zephyr for both switched and dedicated services.

A term now used generically to describe all one-line dial-up telephone line processors. The Comrex company was the first to market these products and still has the lions' share of the market.

This is a double ended system employing a 250 Hz frequency shift up at the xmit end and 250 Hz down at the receive end. No adjustments, other than setting level, should be required.

Have the xmit end send at the highest level that does not cause objectionable distortion. Material can be sent at full speed or half speed. Half speed can yield results similar to a 5 KHz program circuit, but is only suitable for recorded material. Always do a test recording of half speed material to determine proper operation of the processors and tape recorders.

There are decoders installed in the RC, Master Control and a spare in the basement.

Both MC and STC have two-line decoders.

A similar but incompatible technology is available from Rood.

These systems are being revamped, but not replaced, by FISPO as part of the new satellite system.

1. A mineral used in the manufacture of many things including wire.
2. More importantly, a facility leased from a telco that is analog all-the-way: no carrier, no digital, no nothing but direct voltage in for voltage out.

Why do we care what scheme a phone company is using to deliver a service? Well, a carrier 5k is guaranteed to be good to 5k and that's it. A copper 5k in Washington will usually be good to considerably beyond 5k. The practical upshot is that we can get better performance for less money. The only problem is that you can't specify the type of equipment the Telco uses. In general new service is installed on carrier if it transits more than one central office.

Audio services are also provided by C-SPAN on some cable systems. BBC World Service is available on the SAP channel of C-SPAN2 in many areas.

NPR, and many other broadcasters, tend to operate at a lower level (+4dBm) to gain additional headroom and less distortion.