Specifications
VIDEO EQUIPMENT
506
NOVA SYSTEMS
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■ Full Frame 4:2:2 component syn-
chronizer
■ Freeze Frame, Field 1 and Field 2
with variable strobe
■ Full 6 MHz bandwidth
■ Eliminates cross-color, cross-lumi-
nance, dot crawl and provides 6 dB
of chroma noise reduction.
■ On-board genlock sync generator
with system timing and phasing
controls, advanced sync output
TBC-SF...............................1999.95
StudioFrame Transcoding Time Base Corrector
Operates with virtually any 1/2˝ and 3/4˝ VCR (with or without advanced sync feedback) and provides up to 6 dB of chrominance
noise reduction through a multi-line Adaptive Digital Comb Filter. Featuring component, composite and S-Video inputs and out-
puts, the TBC-SF will transcode any input format to all output formats simultaneously, while also synchronizing time-base stable
feeds. The built-in sync generator genlocks to an external reference and allows for system timing and phasing adjustment.
■
Eliminates “Sparkles”, those black and white
dots that can appear on remote feeds.
Proprietary Adaptive Three-Dimensional
Median Filter analyzes pixels from several
fields of video and replaces the impulse noise
with uncontaminated, clean video.
■ Universal drop-out compensation whether it
is from a time-base corrected VCR source or
the decoded output of a CODEC feed. The
MNR-SF effectively fills in drop-outs with
replacement video from the surrounding pix-
els and previous video field.
■ Controls are accessible locally or remotely.
3-position threshold switch (Off/Low/High)
adjusts system noise sensitivity, while a
bypass/operate switch is also included. Both
switches are remoteable via an RJ-11 jack.
MNR-SF..........................................1199.95
MNR-SF Median Noise Reducer
The MNR-SF is a StudioFrame card that eliminates impulse and transmission noise, cleans up satellite, microwave and fiber feeds and fills in CODEC
and time-based corrected videotape drop-outs. It features full bandwidth, uncompressed 10-bit digital processing for ultimate video transparency, as well
as analog composite inputs and outputs.
HEC SERIES Hum Eliminators
Hum eliminators work best in those circumstances where interference is caused by small differences in ground potential (less
than 20 volts) or by induced currents in long cable runs. When there are multiple power panels in a building, or even on a
single floor, equipment and lighting loads result in small differences in potential which induce ground loop current flow an
60Hz hum. Electromagnetically-induced currents in long cable runs also create hum. For 50Hz and 60Hz power systems, and
where induced currents are high, the HEC-2000 and HEC-2000H increase the attenuation at the power frequency. Should a
small amount of hum remain after an HEC has been an added to the circuit, a second HEC can be added in series, without
significant degradation of the video signal.
HEC-500/100/2000/2000H/3000/4000 ..................................................................................................................................Call For Prices
RF transmission in cables in routinely plagued by 50Hz or 60Hz hum or other interference. When a cable is used for video signals, small
electrical currents caused by differences in ground potential (ground loops) or induced common-noise, can result in considerable hum inter-
ference. Cameras, video recorders, monitors and effects generators—even switchers and computers downstream—are affected. Allen Avionics
manufactures three types of products to eliminate hum caused by ground loops or induced currents. All are broadcast quality. Although they
can be inserted anywhere in the transmission system, they are most effective at or near the end of the cable run.
TBC-SF
VNE SERIES Video Noise Eliminators
Video noise eliminators are effective for video signals up to 30MHz—
encompassing HDTV frequencies—with little distortion. For signals
below 20MHz, they are totally “transparent”. Since hum reduction,
using video noise eliminators, is not as great as with HEC eliminators,
their use is recommended only where higher frequencies are involved.
VNE-50/75/75-3..................................................................Call
VIT SERIES Video Isolation Transformers
When there are hum problems caused by large potential differences (20v or
more) an isolation transformer is needed. The dielectric withstanding voltage of
the VIT is over 500 volts at DC. VITs are true isolation transformers —there is
no DC path between the windings. Frequency response is flat over the range
20Hz to 45Hz. VIT
s also remove the hum created by electromagnetically
induced currents from power lines or distribution systems.
VIT-50/75/75-3 ..............................................................................Call
ALLEN AVIONICS