Qda4-45 Rf Distribution Amplifier Combiner

Product Code: eq33163
Availability: In Stock

$1,227.00 $1,717.80

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Description
Reviews (10)

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.

Parameters
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	8.5 x 1.75 x 6.0" (216 x 44 x 153 mm)
Weight	1.1 lb (500 g)
Packaging Info
Package Weight	1.9 lb
Box Dimensions (LxWxH)	13.1 x 9.5 x 3.3"

QMOD HDTV modulators
QCA9-33 active combiner

Related Questions and Answers

Q: 1. The weight of the unit and the weight of the package is contradicting. The weight of the unit, as listed, appears to be too high. What is the actual weight please?

A: The weight of the PreSonus HP4 - 4-Channel Headphone Distribution Amplifier is 5 pounds.

Q: 2. i want to terminate 21 tv rg6u cables to two splitters in my residence will a cable tronics cta-35 /1000 pr amphlifer help ?

A: No, the CableTronix CTA-35/1000PR CATV Distribution Amplifier will not work for your needs. Based on your request you will need the CableTronix CT-BDA24 for this installation. CableTronix CT-BDA24 1 GHz Single Input/Output Multimedia Drop Amplifier with Adjustable Gain Control and Switchable FM Trap BH #CACTBDA24

Q: 3. I need to input from a 4K directv receiver and output in 4K to my 4k Sony TV and in 1080i to my HD TV. Will this work?

A: Yes, you choose wisely.

Q: 4. Can someone tell me whether the input on this Comprehensive CDA-VGA104HD is a male or female port? Thanks.

A: Input and output are female on the Comprehensive CDA-VGA104HD because a VGA cable is male on both side.

Q: 5. output 2 blinks?

A: The #2 output blinks when called upon.

Q: 6. Hello, about our SD1141, why the led light goes from green to blue after a couple of minutes then the video suddenly drops? How am I going to resolve this issue?

A: What kind of video signal are you sending through the AVMATRIX 1x4 3G-SDI Distribution Amplifier? For technical assistance it is better to reach out to us at customersupport@bhphoto.com

Q: 7. Can this be used to pass tri-level sync for Genlock?

A: The Kramer 1 x 20 Composite/SDI Video Distribution Amplifier cannot be used to pass tri-level sync for genlock.

Q: 8. Can this be used to pass through tri-level sync for Genlock purpose? Thanks!

A: Yes, the Kramer 1 x 20 Composite/SDI Video Distribution Amplifier would be able to distribute Sync to up to 20 sources.

Q: 9. Can this be used for Time Code Distribution?

A: This can be used to distribute tri-level sync, but not time code specifically.

Q: 10. Will this splitter support 59.94hz?

A: According to C2G this spillter supports 3840 X 2160 at 30Hz 4:4:4 along with 3840 X 2160 at 60Hz 4:2:0. It does work with 60Hz, but at a reduced color space only.

Herring	14/09/2024
[1.9 lb] Kramer is our go to long run HDMI distribution amp. They always work when other brands don't. 5

Jon	02/09/2024
[1.9 lb] This is a very simple 1x2 DA that gets the job done. No muss, no fuss. Using it to distribute PGM out from a small HDMI switcher, and it works just fine. 5

Walter	15/07/2024
[40 dBmV] I needed an analog audio DA for a rebuilt radio console. I could have recapped a higher end purpose built DA but the thought of replacing 75 or so capacitors wasn't appealing. For the price the Rolls has excellent specs and I expect it will last in my home studio. Good product at a great price. 5

Woodrow	14/07/2024
[4.5 typical] This is part of a AV system for a church where signal routing is somewhat complex. We substituted this one for a similar item, another brand, and it works like a charm. 5

Reg	06/07/2024
[+50 dBmV] We use this to take one audio stream from a PC and send to 5 cable TV channels. Works great, no dip switches or adjustments necessary. A very quick install. 5

Kenneth	27/06/2024
[1.1 lb (500 g)] I bought this to replace a dying switch. It is everything I hoped it would be. It solved three separate troubles we had with power switching on end devices. Device on or off caused Mac to loose its display config. The switch blocks the signal with EDID. Will definitely consider Kramer for future needs. 5

Christopher	07/06/2024
[40 dBmV] This pushes HDMI signal just right for me. Had two 100' runs for this to 2 monitors with no artifacts or loss of color or clarity. It had a 100' run from the switcher so 200' no issues. Perfect little box and man are they pricey though for 1x2. 5

Carl	06/05/2024
[4.5 typical] This unit is truly plug and play. I am using this in a medium sized conference room to split video between two Epson 1080p projectors. One run is going 90' using 60' & 30' Redmere cables with a coupler. The other is going 50' with a Redmere cable. Inline before this unit I have a 4 way HDMI auto switch that goes to wall HDMI plugs for source selection. So, the signal is passing through multiple long HDMI cables (all Redmere) and couplers before it gets to this unit. I had tried a cheap $ HDMI splitter which didn't have the power to pass both signals. This unit has the power and just works. 5

Luther	05/05/2024
[1.9 lb] I have trusted Kramer products for years. This one just gives me another reason to continue to use them. Very easy to install and works great. 5