SKU: 75998077446

4 Channel 128 dB Programmable Attenuator (USB-C), 0.25 dB Step, 9K-8GHz

Sale price$2477.70 Regular price$2753.00
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

4 Channel 128 dB Programmable Attenuator (USB-C), 0.25 dB Step, 9K-8GHzPart Number: A4Q9K8G128 is a general purpose, four channel programmable attenuator suitable for wide range of signal level control applications from 9K to 8 GHz. The Attenuator provides 0 to 127 dB attenuation in 0. 25 dB steps. The Attenuator is housed in an ultra compact and rugged enclosure with four SMA Female connectors. The attenuator can be controlled via USB. Full software supported with our user friendly GUI application for Windows and Linux.

Part Number: A4Q9K8G128 is a general purpose, four channel programmable attenuator suitable for wide range of signal level control applications from 9K to 8 GHz.  The Attenuator provides 0 to 127 dB attenuation in 0.25 dB steps.

The Attenuator is housed in an ultra-compact and rugged enclosure with four SMA Female connectors.  The attenuator can be controlled via USB. Full software supported with our user-friendly GUI application for Windows and Linux.

It uses USB Type C connector for power and control.

Proudly Made in USA by Lotus Communication Systems, INC. in Massachusetts (www.lotussys.com).

Features

  • Four Channels
  • Frequency Range: 9K to 8G Hz
  • Wide Attenuation Range: 127 dB
  • Fine Attenuation Resolution: 0.25 dB
  • Short Attenuation Transition Time (500 ns)
  • Stainless Steel SMA Female Connector
  • High Quality Rogers RO4350 RF PCB
  • Electroless Nickel Plating and Permanent Laser Marking
  • USB Control
  • ROHS Compliant

Applications

  • Test Instrumentation
  • Automated Test Equipment
  • General Purpose Wireless
  • VSAT
  • SDR & Ham Radio

Resources (Datasheet)

A4Q9K8G128 Datasheet


Windows/Linux GUI Control SW

Self-Executable GUI SW Download

     

    Shipping Notes
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    Exchange/Return Notes
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    • Final sale items are not eligible for returns or exchanges.
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    SKU: 75998077446

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    4.2 ★★★★★
    Based on 1092 reviews
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    Verified Purchase
    Shopper
    Louisville, US
    ★★★★★ 5
    Nice tire sealant.
    Size: 32 oz
    This seems to work very well. I will say that it seems to be pretty important to move the wheel around as soon as you can to distribute the product within the tire. I was held up for a few minutes and the Liqui tube seemed to start to set up in one spot and made the tire out of balance so I had to work quick to get it to distribute to the other parts of the tire. It seems to have worked though and so far the tires are holding air very well. I will be interested to see if it lasts for a long time but so far so good.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 18, 2026
    C
    Verified Purchase
    Captain Al
    Port Orchard, US
    ★★★★★ 5
    This stuff works!
    Size: 32 oz
    I was sceptical but wanted to avoid replacing 2 rear tires on my zero turn mower. The tires were leaking air and had bad sidewall cracking. I found the use of the product to be easy and quick. I aired up the tires and rode around the yard a few minutes to distribute the product in the tires. It has been 4 days and both tires remain aired up. Previously both tires would already be flat within this timeframe. Excellent results for me!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 18, 2026
    J
    Verified Purchase
    james Bays. Yup
    West Palm Beach, US
    ★★★★★ 1
    Doesn’t work for a car Tire seal slow leak
    Size: 16 oz
    Does not work for a car tire. Had a slow rim seal leak. Out 32oz in still leaks the same. Do not buy. I got the one with fibers in it. It worked just fine. This does not work. Period. $30 wasted actually I purchased two so I wasted $60 when I could’ve bought probably a new tire
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 8, 2026
    R
    Verified Purchase
    Rebecca Parker
    Lowell, US
    ★★★★★ 5
    #1 Tire Repair
    Size: 16 oz
    This stuff is Fantastic. I have a riding lawn mower and one of the front tires, which is small, had been running low for a couple of years, we took it off. to fill it with the liquiTube and you could see cracks all around the outside of the tire. The liquid tube oozed out of one of the cracks and sealed , immediately. My brother rolled the tire around real good before we put it back on the track lawn mower. It has been 3 days now and today I mowed for 1 1/2 hrs and the tire as full as it was the day we put in the LiquiTube. This stuff is fantastic, it really, really works!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 31, 2026
    J
    Verified Purchase
    Jana
    Phoenix, US
    ★★★★★ 4
    Awesome
    Size: 32 oz
    Works as advertised. Just don't scrimp... give it the full recommended amount in each tire
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 27, 2026

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