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AT3 Series
1GHz Attenuator

* Mini Size (12.5x30mm)

* SMD Parts

* Excellent Return Loss

* Waterproof (alternative)

* Patented Housing

* Suitable for TV, CATV and
  75ohm RF communication systems

Also Recommended
AT2 : DC Block Series

AT2P : Power Passing Series

AT3-2 : 2.5GHz Series

More ... : 2.5GHz series

Most TV, CATV and Set-top box tuners are designed to operate with input signal levels between
-80dBm and -20dBm per channel. If feed signal levels to TVs, CATV or Set-top box tuners are too high, picture distortions will occur.

It is recommended that by inserting an attenuator into the distribution system, the signal is reduced to less than -20dBm at the TV, Sep-top box RF connector.

The AT3-1xxW series is able to meet the needs of general-purpose attenuation applications in the LF/VHF/UHF frequency range.

The specifications: from 5MHz to 1000MHz at 100mW average, 200mW peak, excellent return loss(>20dB) and good accuracy (+/-0.2dB typ). (see graph)

Our mini-size attenuators are also available with DC Block (AT2) and Power Passing (AT2P).

* Specify dB value when ordering.
* Double sided F-female connectors are availble.

Model Attenuation Model Attenuation
AT3 - 103W   3dB AT3 - 105W 5dB
AT3 - 106W   6dB AT3 - 110W 10dB
AT3 - 109W   9dB AT3 - 115W 15dB
AT3 - 112W 12dB AT3 - 120W 20dB
AT3 - 116W 16dB    
AT3 - 118W 18dB    
  Electrical Curve ( AT3-106W / AT3-110W )

Insertion Loss  |  Return Loss
SPAN 1000MHz
Fig 1

Insertion Loss  |  Return Loss
SPAN 1000MHz
Fig 2
  General Specifications
  Item AT3 - 110W AT3 - 110
  Power Passing Disallow Disallow
  Waterproof Yes No
  Impedance 75 ohm
  Frequency Range 5 - 1000MHz
  Insertion Loss 10dB (typ)
  Flatness +/-0.4dB (max)
  Return Loss 20dB (min)
  Power 100mW (average)
  Dimensions 12.5(¢) x 30 mm
  Net Weight 12g
   * Specifications are subject to change without notice.



No.43, Huangong Rd., Yongkang Dist., Tainan City 710, Taiwan
TEL: 886-6-2016969   FAX: 886-6-2013939   E-mail: soontai@soontai.com