Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner

Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner

Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner

B&H # COQDA445 MFR # 5092-001
Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner

Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner

Show MoreLess

Close

Now Viewing:

More Coming Soon
Expected availability: 7-10 business days 
Man Behind Layer

B&H $1000 Giveaway

Share your most-wanted item with friends & family for chances to win a $1000 B&H Gift Card. It's that easy!

1 new winner announced every week!
Limit 1 entry per day; Come back every day to increase your chance of winning!

Be sure to mention #BHWishList when you share!

Share on Twitter Share on Facebook

Congrats to our winners so far — Mark P., Lauren K. & Daniel M.

Official Rules

OFFICIAL B&H $1,000.00 GIVEAWAY RULES

NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $1,000.00 Giveaway (the "Giveaway" or "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about November 7, 2016 until on or about December 19, 2016 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share your most wanted item on Facebook or Twitter via the dedicated links found on the B&H Website (www.bhphoto.com); or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $1,000.00 Giveaway, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third-party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total three (3) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $1000.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize to the e-mail address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the e-mail account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An e-mail account holder shall mean the natural person assigned to such e-mail account by the internet access or online service provider or other organization responsible for assigning e-mail addresses for the domain associated with such e-mail account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $1,000.00 Giveaway Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $1,000.00 Giveaway, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

Let us know how to reach you if you win!

Privacy 100% guaranteed; email address for contact purposes only

Email

Already have a B&H account? Just log in tomorrow to enter again!

$0.00 Tax Collected Outside NY

You Pay: $370.00

OR
Add to Wish List Item in Wish List
  • 1Description

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
    • 1Description
    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)

    Contemporary Research QDA4-45 RF Distribution Amplifier & Combiner Review

    Be the first to review this item
    See any errors on this page? Let us know.