Digital Composite STL
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Lebih Lengkap Mengenai Digital Composite STL
Topanga is the World’s First Open
Architecture Digital Composite (MPX) RF Studio Transmitter Link.
Topanga’s Digital platform offers greater than 20 dB System Gain
Advantage over old Analog Composite systems. Topanga’s Open Architecture
offers for Customization and Adaptability to changing Requirements and
Technologies
According to the company, Topanga has a greater than
20 dB system gain advantage over analog composite systems which should
guarantee improved signal to noise rations and stereo separation.
Besides
the MPX feed, Topanga has an Ethernet interface for HD Radio data along
with RS-232 channels for RDS. It can be operated through the front
panel or remotely over the internet. In addition, Topanga has Moseley’s
new 5 W transmitter, which is also being added to the Starlink RF STL.
Features:
-Bandwidth 500 kHz 32 QAM Mode, 230 kHz in 128 QAM mode
-Input Level 3.5 Vp-p for 100% modulation; 4.0 Vp-p clipped
-Input Impedance 6k Ohms, single-ended, BNC
-Output Level 3.5 Vp-p for 100% modulation
-Output Impedance 75 Ohms. Single-ended, BNC
-Output Load 75 Ohms or greater, maximum load capacitance 0.047 microfarads.
-Maximum recommended cable length 100 ft RG-58A/U
-Signal-to-Noise Ratio > 85 dB (de-emphasized, 20 Hz – 15 kHz bandwidth, referenced to 100% modulation, unweighted).
-Distortion ≤ 0.05% THD (de-emphasized, 20 Hz – 15 kHz bandwidth, referenced to 100% modulation, unweighted).
-Stereo Separation >70 dB, 30 Hz – 15 kHz (referenced to 100% modulation = 3.5Vp-p) (for 500 kHz System)
-Crosstalk-Linear > 80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).
-Crosstalk-Non-Linear > 80 dB, main channel to sub-channel or sub-channel to main channel (referenced to 100% modulation).
