Broadcast Microwave Services Inc TCIIAD-2 Manual De Usuario

Descargar
Página de 50
 
3
complete. Analog transmission offers a more graceful degradation in performance and might be preferred 
under certain conditions. 
The Digital (COFDM) modulator also supports 2 analog audio and one analog video input but also supports 
advanced digital interfaces (ASI, SDI) as well. The digital modulator includes an MPEG2 encoder and a 
DVB-T compliant COFDM modulator. Both MPEG and COFDM parameters are fully configurable by the 
system controller in support of optimum performance and compatibility with other vendors equipment. For 
those users less familiar with detailed COFDM and MPEG settings, the equipment provides 3 preset 
robustness settings (low, mid and high) that each optimize video performance at the expense of modulation 
complexity. High robustness provides the lowest quality video but is able to operate in severely 
compromised locations. Low robustness provides the best quality video but may require a clear line of sight 
shot. 
An integrated SMPTE color bar generator with programmable text overlay is included. The text overlay 
can be conveniently programmed to show the unique ID of the ENG van. The color bar generator can be 
configured to turn on automatically when no video input is present or can be manually turned on/off as 
required. The generator can also be configured to inject audio tones. 
The indoor unit features a menu driven VFD front panel display. Two levels of user access are supported; 
Operator and Engineer. Operator is designed for non-technical users and assumes that the equipment has 
been preconfigured by a station engineer. Engineer has full access to all menus and the ability to set up the 
equipment for a less qualified operator.  
The system accommodates up to 999 user programmable presets. These can be uniquely named and 
configured; each preset records all of the configurable variables within the system. Presets 1 thru 6 are 
conveniently displayed on their own screen for quick and easy recall. All presets can be uniquely named 
via the front panel menu system to simplify identification and can be recalled quickly to put the equipment 
in a known state. Presets are an ideal mechanism for the station engineer to pre-configure the equipment for 
simplified operation by a less skilled operator.  
The COFDM modulator also provides an auxiliary data channel that can be configured for data rates up to 
19.2 Kbps. One possible use of this data channel is to transport GPS data from a vehicle mounted receiver 
back to the central receiver. 
The system also features a front and rear panel ethernet interface that can be conveniently used to upload 
new operating firmware into the unit. This interface supports high data transfer rates and simplifies the 
firmware upgrade process. This equipment makes extensive use of FPGA (field programmable gate array) 
and microprocessor controlled hardware. Ease of firmware upgrade helps ensure that the equipment is 
always kept up to date. 
The TCII also includes embedded web based management that can be accessed with any PC using a web 
browser and connected to the front or rear panel Ethernet port. This interface supports all the front panel 
programmable features as well as others such as the ability to configure channel plans, and download 
preconfigured presets (duplicate equipment setups). The system can be controlled remotely via an RS232 
control port as well; consult BMS for the protocol specification for this port.