| SK-8900BS - STEREO SAW FILTER AGILE MODULATOR |
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| Description |
The SK-8900BS is a professional quality, agile modulator with stereo audio, which can be used as an alternate IF input and is specifically designed for use of Head-end systems of CATV.
This product provide audio and video modulated RF carrier on any channel in the 45 to 860MHz frequency range. Many standard audio/video sources can be used, such as satellite receivers and video tape recorders. This modulator has a wide range of standard and optional features that make it very suitable for advanced MATV, SMATV or CATV systems. |
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| Features |
- Hi quality Stereo
- LCD Index Video Modulate Depth and Audio Frequency Deviation.
- Advanced Tehnique and newest circuit design.
- Output Frequency adjustable between 47MHz and 870MHz, sasy setup
- IF Modulate Assure Superiority Capability
- PPL tehnique is applied to Audio IF, Video IF and Local Oscilator to ensure high Frequency Stability Clamp Circuit with High Anti-hum Performance.
- 19" EIA rack mountable
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| Specification |
| Item |
Unit |
Specifications |
| Output Frequency |
MHz |
47-870MHz |
| Frequency accuracy |
|
±5KHz |
| Output Level |
dBµV |
55dBmV |
| Output Impedance |
Ω |
75 |
| Output reflection |
|
12dB min, any channel |
| Audio to Video Carrier Ratio |
dB |
-10 ~ -20 |
| Video Input Level |
|
0.6-1.5 Vp-p |
| Video Output Impedance |
Ω |
75 |
| Video Output reflection |
dB |
30dB min |
| K coefficient |
|
4%(2T pulse) |
| Signal to Noise Ratio |
dB |
60dB |
| C/L Delay |
|
40nsec |
| Band Flatness |
dB |
±1dB |
| Differential Gain |
|
±4%(87.5% Modulation) |
| Differential Phase |
|
± 4°(87.5% Modulation) |
| Video Frequency Response |
dB |
≤1(Within 5MHz) |
| Audio Input Level |
dBm |
0±10 |
| Audio input impedance |
|
10kΩ min |
| Audio Band Flatness |
dB |
±1dB max (40Hz-15KHz) |
| Distortion |
|
1% |
| Signal to Noise Ration |
dB |
-60dB |
| Difference of Video /Audio |
|
5.5MHz±2KHz |
| Video S/N |
dB |
>50 |
| Power Supply |
|
100-250Vac, 50Hz, 15W max. |
| Operation Temperature & Humidity |
|
0°C~45°C " 5%~75% |
| Storage Temperature & Humidity |
|
-20°C~70°C, ≤ 80% (Without Acidity Substance) |
| Mechanical Dimensions |
mm |
440x268x44 |
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Notes:
* Specifications reflect typical system cascade performance, individual station performance may vary.
* Specifications are at the conditions of the operational output level and 25 . |
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| PANEL ILLUSTRATION |
Front Panel
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- LCD Display menu and working statues
- Menu Press this key to show the Menu
- & 4. Up and down key To select the channel, adjust the RF output level, Video modulation depth and volume
- RF Output Test Port ( -30dB )
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Read Panel
 |
- Video Input ( RCA female )
- Audio dual ( L / R ) Input ( RCA female )
- IF Output
- IF Input
- RF Output
- Power socket
- Power cord ( 100V - 250V )
GENERAL OPERATION
1.Connect the standard audio and video cables from other equipment such as DSR to the audio input 2 ( R / L ) and video input 1 port on the rear panel respectively. Please do not forget to connecting IF IN and IF OUT with a cable .
2. When using one modulator only, insert the power plug of the modulator to a power supply socket directly. When using more than one modulator, please insert the first modulator's power plug into the next modulator's power socket, and so on. Remember to insert the last modulator's power plug into a power supply socket.
3.Connect the RF Output 5 on the rear panel to the Channel Mixer of the CATV head-end equipment.
4. Press the Menu 2 to show the RF output level and adjust it by pressing key 3 / 4 on front panel to change output levels to make the output levels of different modulators almost equal
5.Adjust the frequency deviation and video modulation depth to obtain best sound and picture.
6.The A/V has been preset before sold. Do not attempt to adjust the "A/V" in case of unnecessary.
7.Connect the RF Output 5 on the rear panel to the Channel Mixer of the CATV head-end equipment.
8. Press the Menu 2 to show the RF output level and adjust it by pressing key 3 / 4 on front panel to change output levels to make the output levels of different modulators almost equal
9.Adjust the frequency deviation and video modulation depth to obtain best sound and picture.
10.The A/V has been preset before sold. Do not attempt to adjust the "A/V" in case of unnecessary.
NOTICE
1.Avoid storing in a damp place.
2.Be sure to operate carefully since the modulator has no power on/off switch.
3.Any problem, please resort to the supplier for help.
ACESSORIES
1.Audio and Video Connecting Cable (one piece)
2.IF Connecting Cable (One Piece)
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| * Specificatiile pot fi schimbate fara preaviz |
