Description
The CT-SAW860 is an all solid-state audio/video modulator that provides a modulated video andaural RF carrier output on a fixed channel from 54MHz to 860MHz.
The SAW Filtered Audio Video Modulator accepts standard polarity video at a 0.7-2.5 Vp-p level from video sources such as a satellite receiver, demodulator, TV camera, DVD player or video tape recorder.
The unit provides high quality video, color, and audio signals on any unused channel within a closed circuit MATV, SMATV, or CATV system. For easy operation, all level controls are located on the front panel.
Specification
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Place of Origin: Guangdong, China |
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Model Number: GDM-004 (GLM-SAW860) |
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RF |
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1. Output Channels |
TV VHF: 2-13, UHF: 14-69, CATV: 2-127 |
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2. Output Level |
+55 dBmV (minimum) |
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3. Output Level Range |
13 dB |
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4. A/V Carrier Ratio |
-7dB to -22dB |
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5. Spurious Output |
-60 dB below video carrier (@A/V carrier ration -15 dB, output level: +55dBmV) |
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6. Frequency Accuracy/Stability |
±5 KHz |
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7. Output Impedance |
75 Ohms |
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8. Output Return Loss |
9 dB |
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VIDEO |
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1. Video Input Level |
0.7 Vp-p minimum @87.5% Modulation |
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2. Differential Gain |
<5% (10 to 90% APL) |
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3. Differential Phase |
<5˚ (10 to 90% APL) |
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4. Hum and Noise |
-60 dB @87.5% Modulation |
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5. Visual Carrier to Noise Ratio |
60 dB @4 MHz BW |
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6. Frequency Response |
±1.7 dB (30 Hz to 4.2 MHz) |
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AUDIO |
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1. Input Level |
0.8 Vp-p for ±25 KHz Deviation |
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2. Input Impedance |
600 Ohms Unbalanced |
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3. Pre-Emphasis |
75 µSec |
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GENERAL |
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1. Power Input Range |
120 VAC, 60 Hz |
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2. Operating Temperature |
32 ˚F ~ 122 ˚F |
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3. Connectors |
All "F" Type |
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MECHANICAL |
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1. Dimensions |
19" (W) x 1.75" (H) x 2.25" (D) |
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2. Weight |
4.3 lbs |
Goodmind Electronics (Shenzhen) Co., Ltd. was established in 1992 with a registered capital of 18 million U.S. dollars. Its own factory is located in Shenzhen and has more than 1000 employees. It is a high-tech enterprise integrating R&D, production, sales and service , The company specializes in Antenna / Network Communication / Bluetooth / AV Accessories / Smart Home / Car Accessories professional manufacturing company. The factory is vertically integrated. The factory has plastic processing, metal stamping, zinc die casting, SMT , DIP and Assembly center. The company has strong financial strength, professional R&D team, excellented manufacturing equipment and lean manufacturing, and is dedicated to creating high-quality products for customers.
What is a SAW Filtered Audio Video Modulator?
A SAW Filtered Audio Video Modulator is a device commonly used in analog television systems for broadcasting audio and video signals. It employs a Surface Acoustic Wave (SAW) filter to precisely shape and filter the modulated signal, ensuring compliance with specific frequency standards and reducing interference.
How does a SAW Filter work in this context?
A Surface Acoustic Wave (SAW) filter is an acoustic wave device that filters and processes electronic signals at radio frequencies. In this modulator, it helps refine the frequency characteristics of the audio-video signal, ensuring it stays within the designated frequency spectrum and minimizing interference.
What is the purpose of a SAW Filter in an Audio Video Modulator?
The SAW filter in the modulator serves to shape and filter the modulated signal. It helps meet specific frequency standards, prevent interference with adjacent channels, and improve the overall quality of the transmitted audio-video signal.
SAW Filtered Audio Video Modulator
A SAW (Surface Acoustic Wave) Filtered Audio Video Modulator is a device used in analog television systems for broadcasting audio and video signals. It incorporates a SAW filter, which is an acoustic wave device, to precisely shape and filter the modulated signal. This helps ensure compliance with specific frequency standards and reduces interference.
Is this type of modulator still relevant with the shift to digital broadcasting?
With the widespread shift to digital broadcasting, traditional analog audio-video modulators with SAW filters are becoming less common. Digital broadcasting systems often use more advanced modulation and encoding techniques.
How does the modulator address interference from adjacent channels?
The SAW filter is instrumental in reducing interference from adjacent channels or unwanted signals. It ensures that the modulated signal stays within the allocated frequency range, minimizing the risk of interference.
FAQ
Q: Can a SAW Filtered Audio Video Modulator handle multiple channels?
A: Yes, depending on its design and specifications, a modulator can handle multiple channels. It's crucial to check the device's capabilities and ensure compliance with regional broadcasting standards.
Q: How do I ensure compatibility with regional broadcasting standards?
A: It's essential to consult with manufacturers or suppliers to ensure that the SAW Filtered Audio Video Modulator complies with the specific broadcasting standards and regulations in your region.
Q: Is there ongoing support for maintenance and upgrades for this type of equipment?
A: As analog broadcasting systems are phased out, support for maintenance and upgrades of traditional analog modulators may become limited. Consider transitioning to digital solutions for long-term viability.
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