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User Manual for Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner Click to enlarge the picture
Contents of the user manual for the Contemporary Research QDA4-45 RF Distribution Amplifier
- Product category: RF Equipment Contemporary Research
- Brand: Contemporary Research
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Contemporary Research RF Equipment
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User manual for the Contemporary Research QDA4-45 RF Distribution Amplifier contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Contemporary Research product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Contemporary Research user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Contemporary Research product will considerably shorten its lifespan!
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Product description The Contemporary Research QDA4-45 is an amplified RF combiner that can switch between one or four inputs, with adjustable amplification up to 50 dBmV. You can add up to 32 dBmV gain for one input, and 25 dB for four inputs. Designed for QMOD HDTV applications, the unit 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. This compact unit mounts two-across in a single rack space using CR RK1 and RK-2 rack kits (available separately), and can be mixed with QMOD HDTV modulators using the same rack kits. Compatibility -
- QMOD HDTV modulators
- QCA9-33 active combiner
Product Highlights -
- Switches between one input or four input combiner
- Adds up to 32 dBmV gain for one input, 25 dB for four inputs
- Adjusts RF gain from front-panel controls and LCD display
- Provides a maximum output level of up to 50 dBmV
- Wideband, low-noise amplifier
- Low power, draws less than 8.5W
- Compact metal enclosure, mounts 2 across in 1 RU using RK1 and RK2 rack kits (available separately)
- Made in USA
Applications -
- Use the QDA4-45 as a 4-channel, 45 dB amplifier for larger RF applications
- Combine up to four QMOD modulators
- Combine four QCA9-33 active combiners for 36 channels
- Use as launch amplifier for the RF system
- Use as booster amplifier to merge QMOD channels with existing 50 dB analog modulator systems
In the Box Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner PS12-1 1A 12 VDC Power Supply Limited 2-Year Warranty Table of Contents
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Technical parametersContemporary Research 5092-001 Specs | Front Panel | Input Selection: 1 or 4 inputs (green LED indicators)
RF Gain Selection with LED Display: 0 to 25 dB for four inputs, 0 to 32 dB for one input | | Back Panel | 4 x Input F connector
1 x Amp out F connector
1 x DC power input (2.1 mm coaxial jack, inside center conductor positive) | | Maximum Input | 40 dBmV | | Isolation | 38 dB typical, 30 dB minimum, 54 to 860 MHz | | Return Loss | Input: 30 dB typical, 13 dB in single input mode
Output: 17 dB typical | | Output | Input 1: 0 to 32 dBmV gain, low noise, linear performance through 860 MHz
All Inputs: 0 to 25 gain (7 dBmV loss from combiner) | | Maximum Output Level | +50 dBmV | | Composite Triple Beat | -60 dB, 134 channels at +44 dBmV per channel | | Noise Figure | 4.5 typical | | LED Indicators | 1 x Power LED 2 x Green LEDs for input selection | | Power Requirements | 11.5 to 13 VDC, 12 VDC typical
700 mA maximum | | Enclosure | Durable metal enclosure, rack mountable | | Dimensions (W x H x D) | 8.5 x 1.75 x 6.0" (216 x 44 x 153 mm) | | Weight | 1.1 lb (500 g) | | | | Package Weight | 1.9 lb | | Box Dimensions (LxWxH) | 13.1 x 9.5 x 3.3" |
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