Transcript
advanced media technologies
Wideband Stereo Modulator
DSM-220 Vital Stats: • Frequency agile from 54-858 MHz • 60 dBmV output • Digital stereo encoder (optional) - SAP (optional) - AGC (optional) • Digital channel display • PLL frequency-synthesized tuning • Selectable frequency offsets (+/- 12.5/25 kHz) • Standard/HRC/IRC channel formats (selectable) • Dual video IF loops (before and after VSB filter) • Automatic video sensing and switching • • • • • • • • •
Manual and remote video/IF switching Convenient removable power cord 4.5MHz BTSC stereo interface Front panel test port Space saving 1 3/4" low profile design RS-232C and I/O interfaces for remote operation Compatible with most scramble systems, including base band type Internal tracking BPF, provides unparalleled C/N performance Phase lock reference interface (optional)
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DSM-220 Wideband Stereo Modulator Specifications RF Output Frequency Range Visual Carrier Output Level Output Impedance Output Level Control Range Aural-to-Visual Carrier Ratio Visual Carrier Frequency Stability Aural Carrier Frequency Spurious Rejection
IF IFv Output Level IFv Input Level Ext. IF Input Level IF CW Output Level VIDEO Input Level Input Impedance Frequency Response S/N Differential Gain Differential Phase
54 ˜858MHz + 60 dBmV 75q, F type female 0 dB ˜_10dB (adjustable) _12 dB _25dB ˜ ± 3 kHz 4.5MHz ±500Hz above visual carrier M 60 dB below visual carrier at +60 dBmV with A/V carrier ratio _15dB
+ + + +
35 35 35 49
dBmV dBmV ±5dB (AGC on mode) dBmV ±5dB (AGC on mode) dBmV
0.7˜2.0 V p-p 75q, F type female ±0.5 dB (50 Hz˜4.0 MHz) M 63 dB 2% typical 1 typical
AUDIO Input Level Input Impedance Total Harmonic Distortion Frequency Response S/N
_10 dBm +10 dBm ˜ 600q Balanced m 0.5% ± 1 dB (40Hz ˜15 kHz) M 60 dB
GENERAL Power Power Consumption Operating Temperature Size W eight
115˜240 VA C ± 10%, 50/60 Hz m 34 W,m 40 W with stereo option 0 C ˜50 C Standard 19” rack mountable 12 lbs.
BTSC Stereo & SAP AUDIO Input Level Input Impedance Frequency Response
Total Harmonic Distortion
S/N
Separation Specifications are subject to change without notice due to product improvements
_10 dBm +10 dBm ˜ 600q Balanced ± 1 dB (50Hz ˜14.5 kHz) L ± 1 dB (50Hz ˜14.5 kHz) R ± 1 dB (50Hz ˜10 kHz) SAP m 1.0% (50Hz ˜14.5 kHz) L m 1.0% (50Hz ˜14.5 kHz) R m 1.0% (50Hz ˜10 kHz) SAP M 60 dB L M 60 dB R M 60 dB SAP M 35 dB (50Hz ˜2 kHz) M 30 dB (2kHz ˜14.5 kHz)
Front Panel Features • • • • • • • •
Stereo modulation LED bar graph (L) Stereo modulation LED bar graph (R) SAP modulation LED bar graph Left/right/SAP level controls Stereo/SAP/AGCstatus LED indicators Video modulation LED bar graph Video/RF output/aural level controls Mode select button (input, address, offset, channel format, channel
select) • Input signal mode indicator for automatic sensing and manual video switching • Address indicator for use with remote control operation • Frequency offset indicator • STD / HRC / IRC channel format indicator • Channel indicator • -30dB test point • Local /Lock /Remote select switch
Back Panel Features • RF output connector • Aural IF signal loop • Video IF signal loop (after VSB filter) • Video IF signal loop (before VSB filter) • External IF input connector
• IF CW output connector • External 4.5MHz subcarrier input connector • Video “A” and video “B” input connectors • RS-232C connector interface (optional) • Control I/O modular jack connectors for linking DSM-220 when in remote operation • Input signal select contact closure terminals • Audio “A” and “B” terminals • Phase lock reference carrier in and out connectors (optional) • Removable power cord • Stereo and SAP input terminals
www.goamt.com
05/06
Advanced Media Technologies, Inc. • 720 South Powerline Road, Suite G, Deerfield Beach, FL 33442 (888) 293-5856 • (954) 427-5711 • Fax (954) 427-9688
