User's Manual

NewsCaster VT2 Features
M17-0002-01A Rev 0.0 16 User Manual
When the Dynamic Color Bar Generator is
activated, a 1 kHz test tone is inputted to the
active audio channels. The left channel will
be a solid tone. The right channel will be a
pulsed tone.
Preset Keys:
Nucomm has designed six Preset Keys into
the front panel of the Newscaster VT2. These
keys are used to instantly recall previously
programmed configuration parameters such as
frequency, modulation format, analog or
digital, video and audio input type, etc.
Frequency Coverage:
Nucomm’s NewsCaster VT2 transmitters are
available in single-, dual-, and tri-band
configurations. This manual covers all the
models in the NewsCaster VT2 series.
The NewsCaster VT2 series radios provide full
coverage of the 2, 7 & 13 GHz US frequency
bands, and/or other bands as required
internationally, from 1 GHz to 15.5 GHz.
Band and channel selections are made and
clearly displayed via the front panel LCD
interface.
Antenna Operation:
The Newscaster VT2 can control a number of
antenna functions, including:
• Polarization switching
• Directional-Omni antenna switching
• Selection between RWI or NSI
Antennas
Coax Cable Requirements:
The NEWSCASTER VT2 Control Unit and
RF Head are typically connected with a single
Coax or Triax cable. This cable carries the
70 MHz IF and the Control Data signals—and
in a typical system, carries the power to the
RF Head, which is diplexed onto the center
conductor of the cable for coax, or through the
inner shield when Triax is used. The cable
conductor must carry 2 to 3 amps of current at
+48 volts.
The center conductor of Belden 1694A/RG
6U coax (or equivalent), and the inner shield
of the Belden 8232A/RG59U triax are large
enough to carry this current with a minimum
of voltage drop.
When using video cable such as RG 58, or
Belden 1505/RG-59U, the voltage drop
through the center conductor is too great to
carry the diplexed +48 volts. To support the
use of these cables—which may be existing in
the Nycoil and must be used—Nucomm has
provided an auxiliary power (“AUX Power”)
connector that routes the power to external
wires. Refer to Section 4.7 for details.
The standard coax cable required between the
Control Unit and the RF Head must have an
impedance of 75 . The Newscaster will on
occasion, be used to replace systems that use
50  RF or video type coax cable in an
existing Nycoil. On special request, Nucomm
can configure the Newscaster VT2 system to
operate using these 50  cables. Again,
depending on the type of coax cable used in
the pre-existing Nycoil, the power to the RF
Head may require the use of the AUX Power
option.