Mic A & B :   Provides on/off key for the commentators headset or lip mic. Either of these mic inputs, may be programed by network software, to be used as producer talk over to the commentators. 

Mic C :   Provides on/off key for an interview mic. 

FB:  (fold back):  Provides listen level control of IFB, Mix minus or N-1. 

Mixed Output :   Provides listen level control of the out going program. 

Int'l Sound :   Provides listen level control of effects audio. 

Guide 1:   Provides listen level control of English program or any other source. 

Guide 2 :   Provides listen level control of the International Director or any other source. 

T/B Co-ord :   Provides listen level control for a 4 wire coordination circuit. Mic A&B may be keyed to talk on the coordination circuit, at which time they are removed from the program circuit. If “Producer Talk Over” option is enabled, they may, simultaneously, be keyed for producer talk over and the coordination talk circuit.

Since 1989 Strategic Television has provided commentary systems at a wide variety of events for our clients.  In 1996 RF Systems, our vendor, having provided commentary systems for over 200 internationally broadcasted events from the US, embarked on a project to design and manufacture a new Euro style commentator station, the CS-4.  Introduced in 1997 at the Indianapolis 500, the CS-4  provided far more versatility than any other unit used in the US. 

All of the units are software controlled via a digital network which provides for quick and efficient set-up and control of a total system. Since the CS-4 is very similar in layout to already existing European commentator stations, the commentators will find the CS-4 easy to use. 

Canal+ France, Canal+ Spain, Canal+ Flanders, Canal+ Belgium, Canal+ Holland, Canal+ Poland, HBO Poland, Super Sport Sweden, TVS Denmark, DSF Germany, Premiere Germany, B Sky B London, Ch-5 London, TV-3 / TV-1000, EuroSport, NTV Russia, JSB Japan, Telepiu Italy, CIA Italy, TV Globo Brazil, Televisa Mexico are some of the broadcasters to use the CS-4 since it's introduction. 

TECHNICAL FEATURES

Each CS-4, provides a position for two commentators and or producers and up to three units may be linked together so as to provide six positions. Each position allows the user to have independent level control of the left and right ear for up to six sources. Two mic level inputs are available for the commentator's headset microphone and an additional input is available for an interview microphone. 
A hand held lip microphone may be used on any of the inputs. Each microphone input has it's own limiter and the threshold of each limiter is controlled via the digital network. Three program outputs are available, one at the rear of the CS-4, two at the system base station, where program may be sent by an 
auto answer phone coupler and simultaneously by ISDN or satellite. At the system base station, the mix minus circuit may be received by an auto answer phone coupler or directly from ISDN. 

We also have ISDN circuits installed at British Telecom in Washington D.C. which allows us to back haul audio programming to be uplinked on British Telecom's B-Mac and or digital services. 

Strategic Television and it's vendor RF Systems have provided ISDN connectivity and services from the United States directly to the following foreign clients: Canal + France, Canal + Belgium, Canal + Holland, Canal + Flanders, Filmnet Sweden, TV-1000/TV3, Premiere Germany, SAT-1 Germany, DSF Germany, ARD Radio, ITV Sports, BBC TV & Radio, B-Sky-B, Ch 5 London, Mentorn Films London, Eurosport, SER Radio Spain, ORF Vienna, JSC Israel, JSB Japan and NHK Japan. 


ISDN TECHNICAL INFORMATION

1) Codecs : Musicam USA (formerly CCS Audio Products) CDQ-1000, Prima 110 & Prima 120 

2) Encoder Algorithms :   CCS Musicam; ISO/MPEG Layer II; CCITT G.722

3) Algorithm Modes :   Mono, Dual Mono and Joint Stereo

4) Sampling Rates :   48Kbs or 24Kbs 

5) Bitrate :   Nearly all of the United States now supports 64 Kbps. But there are still a few areas in the US 
    that still ONLY support 56Kbps.