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Update on Transmitters
Harris Broadcast has rebranded its radio line as GatesAir, and the company has not been resting on its laurels. The Flexiva series is now available from the FAX50 up to the FAX3.5K (which tops out at 3.85kW). The series has an integrated low-pass filter, and so each can operate as a standalone transmitter. Coming soon for the Flexiva series is the new Generation 4 HD Radio Exgine, which will feature hybrid crest factor reduction, asymmetrical sideband generation, MER metrics and advanced real-time adaptive correction. Some of the other particularly interesting features of the Flexiva series are:
■ Support for Single Sideband -- Suppressed Carrier (SSB-SC) stereo mode operation
■ ITU 812R multiplex power limiter
■ External 10MHz and I PPS clock reference inputs for synchronization purposes in single-frequency networks; optional GPS receiver
■ Low-power preset mode, for easy power-reduction during tower work
■ Remote control via eight assignable GP I/O, Web access, SNMP
■ Optional Orban 5500H internal audio processor
■ Accepts MPX over AES192 from Orban, Omnia and Wheatstone processors
Gates Air has also developed an IP audio codec that can transport MPX/AES192 over Ethernet (a world's-first, according to the company). This will allow the audio processors, RDS, and SCA generators to be located back at the studio -- sending the entire composite package to the transmitter site by way of IP.
The latest product line from Broadcast Electronics is the STX LP series -- in power levels from 1kW to 5kW. You could consider the STXe, which is based on the STX design, for power leverls between 70 and 550W. The STX LP is a scalable design that (according to BE) will accommodate current and future system configurations, such as main/alternate main, FM single-frequency networks, and N+1 applications. Some of the other STX-LP important features:
■ Integral exciter
■ RF input that accommodates external exciter
■ Integral low-pass filter
■ Composite input, with 2 SCA ports and RDS port
■ Plug-in stereo generator accepting L/R or AES
■ Integral back-up controller
■ Front-panel control, metering via LCD interface
■ Embedded Web server allowing IP access
The STX LP 1kW occupies 3RU. The 2kW STX occupies 10RU, the 3kW occupies 13RU, and the 5kW occupies 19RU. BE also can provide its Advanced Remote Graphical Interface (RGUI) that allows for Web-enabled control of up to eight STX-LP transmitters, also providing the means to view transmitter and PA data and logs.
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