|David Fort and one of the Linear transmitters used by the Daystar Television Network
INDIANAPOLIS—Daystar Television Network
is an international ministry employing
satellite, cable, terrestrial broadcasting
and streaming video to convey its message
worldwide. We operate some 100 television
stations in the United States alone.
In 2006 Daystar received a production
prototype AT7200 digital transmitter from
Linear Industries which was used for about
four months as a market reference test unit.
We’d agreed to this plan knowing that Linear
would replace and update the transmitter
if the purchase was approved. After a
satisfactory trial, Linear replaced it with its
first production DTV transmitter sold in the
United States. We operated this transmitter
under an STA until November 2008 and the
completion of a new transmitter site.
In 2007, WDTI replaced its tube-type
analog transmitter with a Linear 1 kW unit.
WDTI’s previous owner had been operating
at the minimum power level for a full-power
license, and as the station’s pre-transition
assignment was Channel 69, our power
increase application was caught in an FCC
freeze, so the 1 kW transmitter remained in
service until the transition was finished.
CAN’T KEEP A GOOD TRANSMITTER
As a testimony to the technical support
offered by the Linear team, when this analog
transmitter was severely damaged by a
utility company power surge that followed
a lightning strike and power outage (miraculously
the digital unit wasn’t affected),
Linear technicians were able to restore the
unit to full power within 18 hours after calling
for help. The cause of the power surge
was never determined, but it was so severe
that the building’s surge protectors had to
be replaced and a co-located station lost a
good deal of its equipment.
This repaired transmitter was later retuned
for service in the post-transition
channel allotments and placed into service
at a Daystar low-power television station.
Since these initial experiences with
Linear equipment, I’ve installed three additional
Linear transmitters, with power levels
ranging from 500 Watts to 2 kW for the Daystar
Television Network. All of these installations
have gone smoothly.
A big plus is Linear’s use of a password-protected
Web interface, which allows us
to conveniently monitor all transmitter parameters.
We’ve found the transmitters to
be well constructed and extremely reliable.
Their automatic precorrection algorithms
and circuitry is fast and accurate. Technical
support has been readily available and Linear
personnel have a solid understanding of
the company’s products. Daystar now has
some 30 Linear transmitters in service at its
EXCITERS EXCEL TOO
In addition, Daystar has retrofitted Linear
exciters into 30 of its existing transmitters.
These exciters have provided excellent
performance with both IOT and solid-state
transmitters from various manufacturers.
In addition to being very easy to set up
and maintain, the measurement software
provided with the exciters provides confidence
monitoring of 8-VSB parameters, saving
us the cost of purchasing expensive test
equipment for each site.
Daystar is also using Linear’s LEX2410
encoder in connection with our broadcast
operations and now have approximately
60 installed. These are as easy to set up
and maintain as the company’s transmitter
All of our Linear installations are providing
a reliable and cost-effective way to reach
our viewers, and helping Daystar fulfill its
mission in spreading the Gospel throughout
David Fort is chief engineer at Daystar
Television Network’s WDTI Television and
has been involved in broadcasting since
1968. He may be contacted at David.Fort@Daystar.com.
For additional information, contact
Linear Industries—Hitachi Komusai Electric
America, Ltd. at 847-428 5793 or visit