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Home   Modulators   Contemporary Research QDA4-45

Contemporary Research QDA4-45
RF Distribution Amp and Combiner, 4 Inputs, 50dB

Manufacturer SKU: 5092-001
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MSRP: $481.00
Our Price: $409.00
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Product Highlights
  • Switches between one input or four input combiner
  • Adds up to 32 dB 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
 
  • Product Details
  • Specifications
  • Downloads (3)
  • Reviews (0)
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  • Accessories

Switchable Amplified RF Combiner

The QDA4-45 is an RF distribution amplifier and combiner. You can select from one of 4 RF inputs directly from the front display panel giving you the ability to combine up to 36 channels with an optional QCA9-33 combiner. From the front LCD display you can then adjust the amount of gain, then amplify up to a level of 50db.

Use our signal strength calculator to determine how much signal you need click here the excel spreadsheet.

Receive your RF feed and combine up to four QMODS.

The QDA4-45 is Switchable

Switch between 1 or 4 inputs with selectable gain and adjustable amplification up to 50dB.  You can add up to 32 dBmV gain for one input, and 25 dB for 4 inputs.

Applications of Use

  • Combine up to 4 QMOD Modulators
  • Combine 4 QCA9-33 Active Combiners for 36 channels
  • Use as launch amp for RF system
  • Use as booster amp to merge QMOD channels with existing 50 dBmV analog modulator systems

Front Panel:
Input Selection, 1 or 4 inputs, Green LED indicators
RF Gain Selection with LCD display, 0-25 dB for four inputs, 1-32 dB for one input
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 12.7 VDC, 12 VDC typical
Use included 12 VDC power supply, do not share DC power with other DC supplies (voltage is often 13V and above)
Inputs:
Max Input Level: 45 dBmV
Combiner Isolation: 38 dB typical, 30 dB minimum, 57 - 861 MHz
Return Loss: 30 dB typical
Outputs:
Input 1 only: 1-32 dB gain, low noise, linear performance through 861 MHz
All Inputs: 0-25 dB gain (7 dB loss from combiner)
Max Level: Maximum level 50 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
Additional Specs:
Size:8.5" [216mm] wide x 1.75" [44mm] height (1RU) x 6.0" [153mm] deep
Weight: 1.1 lbs [500g]
Enclosure: Durable metal enclosure, rack mountable, do not mount adjacent to QMODs (blocks air flow)
Includes: PS12-1.0 1A 12VDC power supply & RKU, Universal Rack Mount Kit
Warranty: 2 Years

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Accessories:

Contemporary Research QCA9-33 Active Combiner, 8+1 Inputs, 33 dB Max Level
Your Price: $313.00
Contemporary Research RK1 Single Rack Kit for Tuners, QMODs & Combiners
Your Price: $38.00
Contemporary Research RK2EZ Dual Rack Kit for Tuners, QMODs, and Combiners
Your Price: $38.00
Contemporary Research PS12-1.0 12VDC 1.0A Power Supply
Your Price: $26.00

Downloads:

  • Contemporary Research QDA4-45 Specifications (PDF)
  • Contemporary Research QDA4-45 Manual (PDF)
  • Contemporary Research QDA4-45 CAD Drawing (PDF)

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