SJ-4B

Query


1.0 GHz SJ-4B Step Variable Attenuators produce flat (even) loss across Cable TV forward and reverse frequency band. The attenuators are used during amplifier balancing to adjust amplifier signal levels as needed. The step variable loss produced (dB) is between 0 dB to 2.5, 5, 10, 15 dB base on the step. The attenuators are rated for operation up to 1.0 GHz. Within specific amplifier types, the attenuators are also used as equalizers. 






Item

Units

Value

 Attenuation Values

dB

0 – 2.5

0 - 5

0 - 10

0 – 15

 Step Value

dB

0.5

1

2

3

 Frequency

MHz

0 - 1000

 Tolerance at 5 MHz

dB

≤ 0.2

 Flatness

dB

± 1.0

 Return Loss

dB

≥ 12.0

 Impedance

Ω

75

 

Note: Unless otherwise noted, all specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based upon measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.

Dimensions

Shaft Size

Shaft diameter Ф( mm )

Shaft length  L ( mm )

5

0, 5, 10



SJ-4B-0.5dB Step - Value 0 - 2.5 dB

SJ-4B-1dB Step - Value 0 - 5 dB

SJ-4B-2dB Step - Value 0 - 10 dB

SJ-4B-3dB Step - Value 0 - 15 dB

About Us

SQ Electronic Equipment Co., Ltd is a technology enterprise specialized in R&D and manufacturing of CATV and PDU related products. The history of the company goes back to 1991. Originally it was a Shanghai based company（ShangHai QianJin Electronic Equipment Co., Ltd). Due to the rapid development of business activities and customer needs, established a 17000 square meter manufacturing base in Suzhou(Qianjin Electronics (Suzhou) Co., Ltd.). Due to strategic upgrading and development, SQ Electronics (Suzhou) Co., Ltd was established in September 2024 and officially switched, embarking on a new journey of cooperation.

Currently it has about 100 employees. Among them, more than 30% are engineers and technicians. The company has inherited the core team, technology, resources, and experience of the original company, and is committed to further innovation and development on the existing basis.

SQ products are well accepted in the industry because of our high quality and innovative design. Quality is our number one priority, and our goal is to supply world class products through outstanding service to our customers and partners.



Contact

   Address: No. 5 Qidu Avenue Suzhou City Jiangsu Province China(within Qianjin Electronics (Suzhou) Co., Ltd.)

   Phone: 021-54973555

   Email: eddy@sq-cabledevice.com