Krohn-Hite 3380 Series, 3381, 3382, 3384 Operating Manual

Model 3380 Series

Tunable Active Filter

Op er at ing Man ual

0.1Hz to 200kHz
48dB/Oc tave Slope
Butterworth and Bessel Re sponse
Low-Pass, High-Pass, Band-Pass, Band-Re ject

Model 3381 - Sin gle Chan nel
Model 3382 - Dual Chan nel
Model 3384 - Four Chan nel

Model 3380 Series

0.1Hz to 200kHz (0.005Hz Op tional)

1, 2 or 4 Chan nels, 48dB/Oc tave Slope

Low-Pass/High-Pass, Butterworth/Bessel Fil ter

Op er at ing

Man ual

Copyright© 2004 Krohn-Hite Corporation. All rights reserved. Contents of
this publication may not be reproduced in any form without the written
permission of Krohn-Hite Corporation. Printed in USA - 9/2004.

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Brockton, MA 02301-5566 - Made in U.S.A.

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tion avail able con cern ing the fail ure.

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Cor po ra tion.

Model 3380 Se ries Ta ble of Con tents

Ta ble of Con tents

1.0 GEN ERAL DE SCRIP TION ································1-1

1.1 IN TRO DUC TION ·········································1-1

1.2 SPEC I FI CA TIONS ········································1-1

1.2.1 Func tions (Each Chan nel) ·································1-1

1.2.2 Num ber of Chan nels · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1-1

1.2.3 Fil ter Char ac ter is tics · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1-1

1.2.4 Gen eral ···········································1-2

1.2.5 Op tions ···········································1-2

2.0 OP ER A TION ········································2-1

2.1 IN TRO DUC TION ·········································2-1

2.2 TURN-ON PRO CE DURE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2-1

2.3 SELF TEST············································2-1

2.4 OP ER A TION ···········································2-1

2.4.1 Front Panel Con trols and Dis play ·····························2-1

2.4.1.1 Chan nel Se lec tion (Mod els 3382 and 3384 only) ·················2-1

2.4.1.2 Set ting Cut off Fre quency ·····························2-1

2.4.1.3 Digit Se lect/Fre quency In cre ment and Dec re ment ················2-2

2.4.1.4 Set ting In put Gain

2.4.1.5 Set ting Out put Gain

2.4.1.6 Butterworth/Bessel Se lec tion [TYPE] ·······················2-2

2.4.1.7 Low-Pass and High-Pass Op er a tion – [MODE] ··················2-2

2.4.1.8 Vari able Band-Pass Op er a tion (Mod els 3382 and 3384 only) ··········2-2

2.4.1.9 Vari able Band-Re ject Op er a tion (Mod els 3382 and 3384 only)··········2-3

2.4.1.10 AC/DC Cou pling ·································2-3

2.4.1.11 Dif fer en tial/Sin gle-Ended In put··························2-3

2.4.1.12 Stor ing a Fil ter Setup [STORE] · · · · · · · · · · · · · · · · · · · · · · · · · 2-3

2.4.1.13 Re call ing a Fil ter Setup [RECLL]· · · · · · · · · · · · · · · · · · · · · · · · · 2-3

2.4.1.14 Clear En try Key – [CE] · ·····························2-3

2.4.1.15 All Chan nel Mode (Mod els 3382 and 3384) – [ALL CH] ·············2-3

(Pre-Fil ter) ····························2-2

(Post Fil ter) ···························2-2

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2.5 REAR PANEL DC LEVEL AD JUST MENTS ···························2-3

2.5.1 DC Level Adj (Rear Panel) Out · · · · ··························2-3

2.5.2 DC Level Adj (Rear Panel) HP ·······························2-3

2.6 FIL TER CHAR AC TER IS TICS ··································2-4

2.6.1 Am pli tude Re sponse · · ··································2-4

2.6.2 Phase Re sponse ······································2-4

2.6.3 Group De lay········································2-4

2.6.4 Tran sient Re sponse · · ··································2-5

3.0 IN COM ING AC CEP TANCE ································3-1

3.1 IN TRO DUC TION ·········································3-1

3.2 TEST EQUIP MENT RE QUIRED ·································3-1

3.3 CUT OFF FRE QUENCY AC CU RACY · · · · ··························3-1

3.4 STOPBAND AT TEN U A TION···································3-1

3.5 PRE-FIL TER AND POST-FIL TER GAIN AC CU RACY ·····················3-2

3.6 NOISE CHECK ··········································3-2

3.7 COM MON MODE RE JEC TION ·································3-2

3.8 DIS TOR TION AND MAX I MUM SIG NAL CHECKS ·······················3-2

3.9 AC/DC COU PLING CHECK ···································3-2

4.0 CAL I BRA TION ······································4-1

4.1 IN TRO DUC TION·········································4-1

4.2 RE QUIRED TEST EQUIP MENT·································4-1

4.3 CAL I BRA TION··········································4-1

4.3.1 DC Level ··········································4-1

4.3.2 100kHz Dif fer en tial In put Ad just ment ···························4-2

4.3.3 Unity Gain ·········································4-2

4.3.4 High Band Fre quency Cal i bra tion ·····························4-2

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