The Model 3940 embodies Krohn-Hite’s unwavering dedication to delivering precision instrumentation that meets the highest engineering and scientific standards. Built for reliability, accuracy, and versatility, this advanced system enhances any measurement or testing environment, offering innovative features designed to support your most demanding applications.

Experience unmatched control and performance with the Model 3940 Programmable Filter. Thoughtfully engineered with a dual-channel configuration, it delivers two fully independent channels of signal filtering in one compact system. This design allows you to process two distinct signals simultaneously—boosting test efficiency, versatility, and throughput.
The Model 3940 stands out for its sophisticated, fully programmable filter architecture. It enables precise customization of filtering characteristics to suit your specific application—whether in R&D, quality assurance, or any advanced signal processing environment. With programmable high-pass and low-pass filters and adjustable cutoff frequencies from 3Hz to 2MHz, it provides the range and flexibility needed to handle diverse signal requirements with accuracy.
Designed for ease of use, the Model 3940 features an intuitive front panel and clear, real-time display for instant adjustments and monitoring. Its GPIB interface allows for seamless integration into automated test setups, supporting remote control and compatibility with modern software-driven systems. Programming and operation are straightforward, ensuring efficient setup and exceptional control.
Built to deliver outstanding signal integrity, the Model 3940 offers:
These features make it ideal for demanding applications including signal analysis, noise suppression, and harmonic distortion testing.
Engineered to exceed performance and durability standards, the Model 3940 incorporates premium components that ensure stability and reliability over time. Extensive testing guarantees consistent performance across varied environmental conditions—delivering trust and dependability when it matters most.
The flexibility of the Model 3940 makes it a valuable tool across industries:
Krohn-Hite is dedicated to delivering excellence in both product performance and customer experience. The Model 3940 is supported by our expert technical team, ready to assist with setup, operation, and troubleshooting to ensure seamless performance in your testing environment.
Discover the advanced capabilities of the Model 3940 Dual-Channel Programmable Filter and elevate your test and measurement performance. Contact Krohn-Hite today to learn how this precision instrument can bring reliability, flexibility, and innovation to your signal processing applications.
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
Email: sales@krohn-hite.com
Coasin
Virrey Del Pino 4071
1430 Buenos Aires
Tel: 54-11-4552-3185
Fax: 54-11-4555-3321
E-Mail: coasin@coasin.satlink.net
Website: www.coasin.com.ar
Universal Electronik Import GmbH
A-1230 Wien, Anton-Freunschlag-Gasse 49
Tel: 43/1/54 51 588
Fax: 43/1/54 51 464
E-Mail: sales@uei-vienna.com
Website: www.uei.at
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Ohmtronics B.V.
Luchthavenweg 81209
5657 EA Eindhoven
Tel: +31-40-2573148
Fax: +31-40-2573178
E-Mail: info@ohmtronics.nl
Web: www.ohmtronics.nl
Suplitec Ltda
Rua Sena Madureira 455
31340-000 Belo Horizonte – MG
PO Box 2103
Tel: 55-313-498-1177
Fax: 55-313-441-0841
Email: suportc@suplitec.com.br
Website: https://www.suplitec.com.br
TestForce Systems
E-Mail: sales@testforce.com
Website: www.testforce.com
Montreal
9450 Trans-Canada Hwy
St. Laurent QC H4S 1R7
Tel: (514) 856-0970
Fax: (514) 856-6983
Toronto
2-1795 Ironstone Manor
Pickering ON L1W 3W9
Tel: (905) 839-4290
Fax: (905) 839-0452
Ottawa
107-235 Menten Place,
Nepean ON K2H 9C1
Toll Free: (888) 880-6804 Ext. 7321
Tel: (613) 829-6859
Fax: (613) 829-5908
Calgary
111-7879 8th St. NE
Calgary AB T2E 8A2
Tel: (403) 247-3725
Fax: (403) 202-2016
Din Instrumentor Ltda
Avda, Holanda 2023
PO Box 335-22
Providencia, Santiago
Tel: 562-205-0100
Fax: 562-225-8139
E-Mail: instrum@dininstrumentos.cl
Website: www.dininstrumentos.cl
Campbell Scientific Measurement Technology (Beijing) Co., Ltd.
Room 1201, 12th Floor, Building 60,
No. 109 Jinghai Third Rd, Beijing Economic/Technological Develop Zone, Beijing, China
Main Phone: 8610.6561.0080
Main Fax: 8610.6561.0081
Email: info@campbellsci.com.cn
Website: www.krohn-hite.com.cn
Email: info@campbellsci.com.cn
Website: www.krohn-hite.com
Tectra d.o.o.
Licka 33
HR-10000 Zagreb
Tel: +385 1615 2606
Fax: +385 1615 2605
E-Mail: zagreb@tectra.hr
Website: www.tectra.hr
Contact: Ivo Novakovic
Tectra A.S.
Domkovska 2342/43
193 00 Praha 9
Tel: 42-02-8192-1650
Fax: 42-02-8192-1649
E-Mail: tectra@tectra.cz
Website: www.tectra.cz
Metric A/S
Roskildevej 8 – 10
DK-2620, Albertslund
Tel: 45-4371-6444
Fax: 45-4371-6433
E-Mail: metric@metric.dk
Website: www.metric.dk
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Intotel Oy
PL 125, 02631 ESPOO (Kutojantie 4)
p. +358 9 521 300
f. +358 9 755 3110
E-Mail: intotel@intotel.fi
Website: www.intotel.fi
Made in Broke
1003 Rue Joseph
REMUET
Tel: 04-74-07-80-33
Fax: 04-74-07-80-37
contact@madeinbroke.com
Nucletron Technologies GmbH
Riesstraße 8
80992 Munich
Tel: 49-89-149002-19
Fax: 49-89-149002-11
E-Mail: info@nucletron.de
Website: www.nucletron.de
Prodigit Electronics Co., LTD.
Shen Zen Office
Tel: 86-755-26063392
Fax: 86-755-26063390
E-Mail: grance@prodigit.com.tw
Tectra Electronics Kft
Mikszath Kalman U. 105
1184 Budapest
Tel: 361-291-1643 or 361-291-2065
Fax: 361-291-1643
E-Mail: tectra@tectra.hu
Website: www.tectra.com
Electronic Enterprises (India) Pvt. Ltd.
OFFICES
MUMBAI
306, Nimesh Industrial Estate
Mulund (E), Mumbai – 400 081
Phone : (022) 2563 9904
Fax : (022) 25633960
Email : eemulund@eeipl.in
Hyderabad Branch Office
403, Taramandal, 5-9-13, Saifabad,
Hyderabad – 500 004
Phone : (040) 23243352,
23237214, 23237215
Fax : (040) 23240172
Email : eehyd@eeipl.in
New Delhi Branch Office
M-4/23, Model Town
IIIrd Main Road, New Delhi – 110 009
Phone : (011) 27124 915
Fax : (011) 2724 0436
Email : eedelhi@eeipl.in
Kota Branch Office
Karmbhoomi
129-A, Shakthi Nagar, Kota – 324 009
Phone : (0744) 2501 113
Fax : (0744) 2501 113
Email : eekota@eeipl.in
Kolkata Branch Office
76/B-9, Raj Mohan
Banerjee Road, Kolkata – 700 035
Phone: (033) 2578 7114
Fax: (033) 2577 0551
Email: eecal@eeipl.in
Bangalore Branch Office
No:12, 1st Floor, 3rd Main Road, Shivanagar, West of Chord Road
Bangalore 560 010
Phone : (080) 2338 0451
Fax : (080) 2338 9273
Email : eebng@eeipl.in
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
RDT Equipment and Systems LTD
22, Efal StreetPetach-Tikva 4951122
Tel.: +972-3-6450708
Fax: +972-3-6450723
Mobile: +972-50-6890021
Call center: +972-3-6450780
E-Mail: ravi@rdtest.co.il
Website: www.rdtest.co.il
Made in Broke
1003 Rue Joseph
REMUET
Tel: 04-74-07-80-33
Fax: 04-74-07-80-37
contact@madeinbroke.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
MNTECH1 Co. ,Ltd
Head Office
1202-105, 102 Singal-ro
Giheung-gu, Yongin-si
Gyeonggi-do, Korea 446-590
Tel : +82-31-891-0011
Fax : +82-31-891-0032
Mobile phone : +82-10-3550-8248
sunglee@mntech1.co.kr
O’Connors Pte Ltd
801, Lorong 7 Tao Payoh, WBL Building
O’Connor’s Annex Block
Singapore 319319
Tel: 65-6470-2000
Fax: 65-6470-3000
Email: enquiries@oconnors.wbl.co.com.sg
Website: www.oconnor.co
Supervy Sistemas, S.A. de C.V.
Circuito Bahamas 9-16
Col. Lomas Estrella-Iztapalapa
Apdo. Postal 150-076
Tel: 52-55-5608-5300
Fax: 52-55-5656-6156
E-Mail: supervy@prodigy.net.mx
Website: www.supervy.com.mx
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Ohmtronics BV
Gelderdijk 32
5975 NT Sevenum
Tel: +31-40-2573148
Fax: +31-40-2573178
E-Mail: info@ohmtronics.nl
Web: www.ohmtronics.nl
Instrutek A/S
Skreppestad Naeringspark
N-3261 Larvik
Tel: 47-33-16-5700
Fax: 47-33-16-5701
E-Mail: post@instrutek.no
Website: www.instrutek.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
AVESCO MARKETING CORPORATION
PO Box 3531, Manila, Philippines
810 Aurora Boulevard corner Yale Street,
Cubao, Quezon City, Philippines 1109
TEL#: (632) 912-8881
FAX#: (632) 912-2352 / 912-2911 / 912-2999
Email: import@e-avesco.com, avesco@email.com.ph
Unitronex Poland Sp z o.o.
Ul. Grochowska 341 suite 68
03-822 Warsaw
Poland
tel: +48 22 631-2643
email: info@unitronex.pl
Website: www.unitronex.pl
Unitronex Corporation (USA)
2155 Shelby Drive Suite C
Sedona, AZ 86336
Tel: 928-862-4037
E-Mail: info@unitronex.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
O’Connors Pte Ltd
801, Lorong 7 Tao Payoh, WBL Building
O’Connor’s Annex Block
Singapore 319319
Tel: 65-6470-2000
Fax: 65-6470-3000
Contact Email: enquiries@oconnors.wbl.co.com.sg
Website: www.oconnor.co
Tectra S.R.O.
Pod Amfiteatrom 7
PO Box 163
SK-93401 Levice
Tel: 421-36-6314581
Fax: 421-36-6312188
E-Mail: tectra@tectra.sk
Website: www.tectra.com
Tectra d.o.o.
Stegne 21
SI-1000 Ljubljana
Tel: +386 15114612
Fax: +386 15114613
E-Mail: zlatko.matic@tectra.si
Website: www.tectra.hr
Contact: Zlatko Matic
Protea Electronics (PTY) Ltd.
23 Galaxy Avenue
Linbro Park, Sandton 2065
Postal Address
Private Bag X19
Bramley 2018
South Africa
+27 (0)11 719-5700
Made in Broke
1003 Rue Joseph
REMUET
Tel: 04-74-07-80-33
Fax: 04-74-07-80-37
contact@madeinbroke.com
Ferner Elektronik AB
Fabriksvagen 2
746 34 Balsta
Tel: 46-08-760-8360
Fax: 46-08-760-8341
E-Mail: info@ferner.se
Website: www.ferner.se
Tectron AG
Rosswiesstrasse 29
CH-8608 Bubikon
Tel: 41-55-243-3800
Fax: 41-55-243-3838
E-Mail: tectron@tectron.ch
Website: www.tectron.ch
Campbell Scientific Hong Kong Ltd
Room 3602, Level 36 Tower 1, Enterprise Square Five, 38 Wang Chiu Road
Kowloon Bay, KL, Hong Kong
Main Phone: 8610.6561.0080
Tel: 886-2-29182620
Fax: 866-2-29129870
Email: info@campbellsci.com.cn
Website: www.krohn-hite.com.cn
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Gama Ölçüm Teknolojileri Dış Ticaret Ltd.
Ankara Caddesi
Orta Mahallesi No 2A
Pendik İstanbul
Tel: 0212 – 320 48 22
Fax: 0212 – 320 48 22
GSM: 0542 – 616 25 29
EMail: info@gamateknik.com
Web: www.gamateknik.com
Krohn-Hite Corporation
15 Jonathan Drive, Unit 4
Brockton, MA 02301-5566
Tel: 508-580-1660
Fax: 508-583-8989
sales@krohn-hite.com
Caltest Instruments Ltd.
4 Riverside Business Centre
Walnut Tree Close
Guildford, GU1 4UG
Tel: 01483 302700
E-Mail: sales@caltest.co.uk
Website: www.caltest.co.uk
TECOTEC JSC
44/120 Truong Chinh
Hanoi, Vietnam
Tel: 84-4-576-3500
Fax: 84-4-576-3498
Email: www.tecotecjsc@hn.vnn.vn