Atec DM-141A, DM-145, DM-145GCR, DM-154, DM-192 User Manual
DM-141A, DM-145, DM-145GCR, DM-154, DM-192
F
REQUENCY
AGILE DEMODULATORS
MegaHZ 800-883-8839 fax: 817-529-0745 Visit us on the Worldwide Web: w ww.megahz.com • sales@megahz.com
For more than two decades, the Videotek family of demodulators has provided the highest
performance at the best value in the indust ry. By offering the greatest selection of
demodulators, with the widest range of features, Videotek has become the largest supplier of
agile demodulators in North America. All models provide video and BTSC stereo signal
demodulation for Broadcast, CAT V and closed circuit monitoring applications. From basic
receiving and monitoring applications to full FCC proof of performance tes ting, Videotek
offers an agile demodulator that will fit your needs and your budget.
DM-192
DEMODULATOR SERIES
FEATURES
• Mul ti-band tuning (VHF/UHF/Cable)
• HRC/IRC tuning capability
• Random access, search or up/down
channel selection
• Front panel Cable/Antenna selection
• Frequency synthesized channel selection
• Front panel audio presence indicators
• Synchronous detection
• Envelope and synchronous detection on
DM-192
• Up to 4 MHz bandwidth for FCC testing
• Audio output configurations for ever y
requirement
• Front panel LED channel display
• Controls for video gain, audio gain and
balance on front panel
• Front panel memory retained for one week
in event of power loss
• All models receive and process PAL-M
• Standards available: NTSC and PAL-M
NTSC DEMODULA TOR SELECTION CHART
Model Cable Chan: Remote Video Video Audio QUAD 4.5MHz/ IF Zero Detection Diff Diff Size
(All tune Out SNR Out Out Comp Loop Carr Gain Phase
VHF/UHF) Pulse
____________________________________________________________________________________________________________________________________
DM-200
1-134 RS-232/422 2 ≥58dB Stereo/ Y Y Y Y Synchronous ≤1.0% ≤1.0˚1/2 x
SAP 1 RU
DM-200A
1-134 RS-232/422 2 ≥58dB Stereo/ N Y Y Y Synchronous ≤1.0% ≤1.0˚
1
/2 x
SAP 1 RU
DM-192 2-125 RS-232/422 2 >55dB Stereo/ Y Y Y Y Synchronous ≤4.0% ≤4.0˚ 1 RU
SAP/ /Envelope
PRO
DM-154 2-99 RS-232 2 >55dB Stereo/ Y Y Y Y Synchronous ≤4.0% ≤4.0˚ 1 RU
SAP
DM-145GCR 2-99 N 2* >49 d B Stereo/ N N N N Synchronous ≤5.0% ≤5.0˚ 1 RU
SAP
DM-145 2-99 N 2 >49dB Stereo/ N N N N Synchronous ≤5.0% ≤5.0˚ 1 RU
SAP
DM-141A 2-99 N 2 >49dB Stereo N N N N Synchronous ≤5.0% ≤5.0˚ 1 RU
DM-100 2-99 N 1 — Stereo N N N N Synchronous — —
1
/3 x
1 RU
* Only 1 video output is corrected with GCR signal
®
DM-141A
800-883-8839 fax: 817-529-0745 Visit us on the Worldwide Web: w ww.megahz.com • sales@megahz.com MegaHZ
DEMODS &
MONITORING
FEATURES:
• 154 channel tuning (VHF/UHF/Cable)
• HRC/IRC tuning capabilit y via wide
range fine t uning
• Random access, search or up/down
channel selection
• Front panel Cable/Antenna selection
• Frequency synthesized channel selection
• Synchronous detection
• Stereo presence indicator
• Front panel LED channel display
• Controls for video gain, audio gain and
balance on front panel
• Front panel memory retained for one
week in event of power loss
FEATURES:
• 154 channel tuning (VHF/UHF/Cable)
• Simultaneous stereo and SAP audio
outputs
• HRC/IRC tuning capabilit y via wide
range fine t uning
• Random access, search or up/down
channel selection
• Front panel Cable/Antenna selection
• Frequency synthesized channel selection
• Synchronous detection
• SAP and Stereo presence indicators
• Front panel LED channel display
• Controls for video gain, audio gain and
balance on front panel
• Front panel memory retained for one
week in event of power loss
FEATURES:
• One GCR corrected output
(video out #2)
• 154 channel tuning (VHF/UHF/Cable)
• Simultaneous stereo and SAP audio
outputs
• HRC/IRC tuning capabilit y via wide
range fine t uning
• Random access, search or up/down
channel selection
• Front panel Cable/Antenna selection
• Frequency synthesized channel selection
• Synchronous detection
• SAP and Stereo presence indicators
• Front panel LED channel display
• Controls for video gain, audio gain and
balance on front panel
• Front panel memory retained for one
week in event of power loss
The most af fordable model in our family, the DM-141Areceives “off-air” or CATV
signals, processes these signals and provides two buffered composite baseband video outputs.
Additionally the DM-141A provides balanced stereo audio out put s which may be monitored
via the f ront panel speaker. Ideal for uses where quality video and stereo audio reception is
required. The DM-141A is used in headends, studios and remotes for monitoring and
retransmission applications.
DM-145
Like the DM-141A, the next model in the Videotek demodulator series, the DM-145,
is perfect for broadcast and cable applications and adds the capability of providing both
stereo audio and SAP (Second Audio Program) outputs. Second language programming,
emergency alert, or radio simulcasting are a few of the applications that require full time
SAP audio.
DM-145GCR
Like the DM-145, the next model in the Videotek demodulator series, the DM-145GCR, is
perfect for broadcast applications where the added capabilit y of Ghos t Cancellation
Reference (GCR) correction to the Video output is needed. Correcting for ghosts from +3 to 42 µsec.
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