Description
The GM55 Commercial Audio Video Modulator have been designed to provide adjacent channel compatibility and FCC Docket 21006 frequency accuracy. This low cost modulator maintains a full 55 dBmv output on any single VHF, Mid, band or Super band channel. Modulated channels may be inserted on any unused channel within a closed circuit MATV or SMATV system.
High quality external modulation and RF level controls assure years of reliable operation. The modulator is shipped with all internal adjustment pre-set and FCC Docket 21006 offset are standard at no extra cost.
- Superior vestigial sideband filtering for Adjacent channel systems
- Full +55 dBmV output
- Low spurious harmonic output
- Highly accurate crystal controlled oscillator for low, middle, high band
- Agile PLL oscillator by dip switch for super band.
- Professional picture quality
- Available in channels 2 thru 36
- Front panel -30 dB test point
- Rear panel AC convenience outlet
- International models available on special order
Specification
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Place of Origin: Guangdong, China |
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Model Number: GDM-016 (GM55) |
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RF |
VIDEO |
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Channels: |
T8~T11, 2~36, A-I and J-W,FCC, Docket 21006 offsets , Factory Set, HRC & IRC offsets available |
Input level: |
5 V p-p minimum for 87.5% modulation |
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Output Level: |
45 to 58 dBmV, continuously adjustable from front panel |
Input Type: |
Composite video negative sync |
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Output Impedance: |
75 ohm |
Visual C/N: |
60dB @4 MHz BW |
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Audio/Video Ratio: |
a. Channels below 216MHz (CH.13): Adjustable -7 to -18 dB continuously. |
Freuqency Response: |
±1.5dB (30Hz to 4MHz) |
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b. Super Band: Adjustable-12 to-18dB in 2dB step |
Hum and Noise: |
-60 dB @87.5% modulation |
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Frequency Stability: |
±10KHz (5KHz in aeronautical band) (Conforms to FCC Docket 21006) |
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Spurious Output: |
60dB below video carrier |
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AUDIO |
GENERAL |
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Baseband Input Impedance: |
600 ohm unbalanced |
Power Input: |
108 to 125VAC, 60Hz, 20W |
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Baseband Input Level: |
0.5V p-p for25KHz deviation |
Operating Temperature: |
-10°C to 50°C |
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Pre-Emphasis: |
75 micro seconds |
Dimensions: |
19"L x 21/4"D x 13/4"H |
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Flatness: |
1.5dB (50Hz to 15KHz) |
Weight: |
4.3 lbs. |
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Video/Audio Separation: |
4.5 MHZ |
Connectors: |
"F" type. |
FAQ
Q: Can you produce the order with the customer's brand?
A: Yes, of course. OEM & ODM service is warmly provided.
Q: How do you control product quality?
A: Quality first. All our selected products undergo standardized testing before packaging and shipping.
Q: How do you ship the goods?
A: We usually transport by sea or air.
Q: What is your main market?
A: Europe, North America, South America, The middle east, and etc.
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