KTWN Deploys Wheatstone Baseband Interface
An FM station in Minneapolis has deployed
Wheatstone’s baseband192 interface, creating a digital link between processing
and transmission. The manufacturer says the station is the first to create such
an “all-digital” air chain.
owned by Northern Lights Broadcasting, went on the air with an AirAura X3 audio
processor last week. The engineering manager is Rob Goldberg, who worked with
colleague Mike Oberg on the installation, according to Wheatstone. The interface
is available in certain Wheatstone audio processing models; it offers AES-EBU
output to feed FM transmitters equipped with digital baseband input.
The idea behind such systems is to eliminate the need for an analog
composite interface between processing and transmission; the concept was in the
at the spring NAB Show, though Wheatstone said in its statement that
baseband192 was built into the original AirAura four years ago and held back
until FM transmitter manufacturers could offer a digital multiplex interface.
the feature earlier this month.
other approaches, baseband192 digitizes the entire multiplex spectrum including
the RDS and SCAs up to 67 kHz for direct AES-EBU into the FM exciter,” the
“Unique to baseband192 is the
ability to piggyback the RDS and SCA signals in digital form, eliminating the
need to re-route these signals directly to the FM exciter instead of passing RDS
and SCA signals through the processor (as is the practice without the digital
Wheatstone has posted photos
and a more
detailed discussion of the benefits and the AES3 format.