The Contemporary Research QDA4-45 is an amplified RF combiner that can switch between one or four inputs, with adjustable amplification up to 50 dB.
Designed for QMOD HDTV applications, the QDA4-45 can receive an RF feed from QMOD modulators or QCA9-33 Active Combiners. Inputs can be switched between one or four inputs, with selectable gain.
The compact QDA4-45 mounts two across in a single rack space using CR RK1 and RK2 rack kits, and can be mixed with QMOD HDTV modulators using the same rack kits. The units are wholly designed and manufactured in the USA.
- Switches between one input or four input combiner
- Adds up to 32 dBmV gain for one input, 25 dB for 4 inputs
- Front-panel gain adjustment and LCD level display
- Provides a maximum output level of up to 50 dBmV
- Wideband, low noise amplifier
- Low power, draws less than 8.5 watts
- Compact metal enclosure, mounts 2 across in 1 RU using RK1 and RK2 rack kits
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Number of Inputs :
4
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Depth :
6 in
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Depth :
152.40 mm
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Height :
1.75 in
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Height :
44.45 mm
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Width :
8.50 in
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Width :
215.90 mm
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Product Weight :
1.10 lbs
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Product Weight :
0.50 kg
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Enclosure :
Durable metal enclosure, rack mountable
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Front Panel :
Input Selection, 1 or 4 inputs, Green LED indicators
RF Gain Selection with LCD display, 0-23 dB for four inputs, 0-30 dB for one
Back Panel
Inputs: 4 F Connectors
Amp Out: 1 F connector
DC Power: Power 2.1 mm coaxial jack (inside center conductor positive), 700 mA maximum, 11.5 to 13 VDC, 12 VDC typical (may be unregulated)
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Inputs :
Max Input Level: 40 dBmV
Combiner Isolation: 38 dB typical, 30 dB minimum, 54 - 860 MHz
Return Loss:30 dB typical
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Output :
Input 1 only: 0-30 dBmV gain, low noise, linear performance through 860 MHz
All Inputs: 0-23 gain (7 dBmV loss from combiner)
Max Level: Maximum level +45 dBmV
CTB: Composite Triple Beat -75 dB, 132 channels at +30 dBmV per channel
Noise: Noise Figure 4.5 typical
Return Loss: 20 dB typical
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Includes :
Options PS12-1 1 A 12 VDC power supply
RK1 Rack Kit for single unit, 1 RU
RK2 Rack Kit for dual units, 1 RU
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RK1
RK1 Single Rack Kit, 1RU
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RK2
Side-by-Side Accessory Rack Kit