Trig-Tek™ 200B Clipper Module User Manual

Trig-Tek™
200B
Clipper Module
User Manual
Publication No. 980954 Rev. A
Astronics Test Systems Inc.
4 Goodyear, Irvine, CA 92618
Tel: (800) 722-2528, (949) 859-8999; Fax: (949) 859-7139
atsinfo@astronics.com atssales@astronics.com
atshelpdesk@astronics.com http://www.astronicstestsystems.com
Copyright 2011 by Astronics Test Systems Inc. Printed in the United States of America. All rights reserved.
This book or parts thereof may not be reproduced in any form without written permission of the publisher.
THANK YOU FOR PURCHASING THIS
ASTRONICS TEST SYSTEMS PRODUCT
For this product, or any other Astronics Test Systems product that incorporates software drivers,
you may access our web site to verify and/or download the latest driver versions. The web
address for driver downloads is:
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If you have any questions about software driver downloads or our privacy policy, please contact
us at:
atsinfo@astronics.com
WARRANTY STATEMENT
All Astronics Test Systems products are designed to exacting standards and manufactured in full
compliance to our AS9100 Quality Management System processes.
This warranty does not apply to defects resulting from any modification(s) of any product or part
without Astronics Test Systems express written consent, or misuse of any product or part. The
warranty also does not apply to fuses, software, non-rechargeable batteries, damage from
battery leakage, or problems arising from normal wear, such as mechanical relay life, or failure to
follow instructions.
This warranty is in lieu of all other warranties, expressed or implied, including any implied
warranty of merchantability or fitness for a particular use. The remedies provided herein are
buyer’s sole and exclusive remedies.
For the specific terms of your standard warranty, contact Customer Support. Please have the
following information available to facilitate service.
1. Product serial number
2. Product model number
3. Your company and contact information
You may contact Customer Support by:
E-Mail:
atshelpdesk@astronics.com
Telephone:
+1 800 722 3262
(USA)
Fax:
+1 949 859 7139
(USA)
RETURN OF PRODUCT
Authorization is required from Astronics Test Systems before you send us your product or sub-assembly for
service or calibration. Call or contact Customer Support at 1-800-722-3262 or 1-949-859-8999 or via fax at
1-949-859-7139. We can also be reached at: atshelpdesk@astronics.com.
If the original packing material is unavailable, ship the product or sub-assembly in an ESD shielding bag and
use appropriate packing materials to surround and protect the product.
PROPRIETARY NOTICE
This document and the technical data herein disclosed, are proprietary to Astronics Test Systems, and shall
not, without express written permission of Astronics Test Systems, be used in whole or in part to solicit
quotations from a competitive source or used for manufacture by anyone other than Astronics Test
Systems. The information herein has been developed at private expense, and may only be used for
operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation
into technical specifications and other documents which specify procurement of products from Astronics
Test Systems.
TRADEMARKS AND SERVICE MARKS
All trademarks and service marks used in this document are the property of their respective owners.
•
Racal Instruments, Talon Instruments, Trig-Tek, ActivATE, Adapt-A-Switch, N-GEN, and PAWS are
trademarks of Astronics Test Systems in the United States.
DISCLAIMER
Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should
ensure that they are used properly and in accordance with this document and any other instructions
provided by Seller. Astronics Test Systems products are not specifically designed, manufactured or
intended to be used as parts, assemblies or components in planning, construction, maintenance or
operation of a nuclear facility, or in life support or safety critical applications in which the failure of the
Astronics Test Systems product could create a situation where personal injury or death could occur. Should
Buyer purchase Astronics Test Systems product for such unintended application, Buyer shall indemnify and
hold Astronics Test Systems, its officers, employees, subsidiaries, affiliates and distributors harmless
against all claims arising out of a claim for personal injury or death associated with such unintended use.
FOR YOUR SAFETY
Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the
WARNINGS and CAUTION notices.
This equipment contains voltage hazardous to
human life and safety, and is capable of
inflicting personal injury.
If this instrument is to be powered from the AC line (mains) through an autotransformer,
ensure the common connector is connected to the neutral (earth pole) of the power
supply.
Before operating the unit, ensure the conductor (green wire) is connected to the ground
(earth) conductor of the power outlet. Do not use a two-conductor extension cord or a
three-prong/two-prong adapter. This will defeat the protective feature of the third
conductor in the power cord.
Maintenance and calibration procedures sometimes call for operation of the unit with
power applied and protective covers removed. Read the procedures and heed warnings
to avoid “live” circuit points.
Before operating this instrument:
1. Ensure the proper fuse is in place for the power source to operate.
2. Ensure all other devices connected to or in proximity to this instrument are properly grounded or
connected to the protective third-wire earth ground.
If the instrument:
-
fails to operate satisfactorily
shows visible damage
has been stored under unfavorable conditions
has sustained stress
Do not operate until performance is checked by qualified personnel.
Publication No. 980954 Rev. A
200B User Manual
Table of Contents
Chapter 1 .........................................................................................................................1-1
Introduction .....................................................................................................................1-1
Description ..................................................................................................................................... 1-2
Specifications ................................................................................................................................. 1-2
Signal Input ................................................................................................................................ 1-2
Signal Output.............................................................................................................................. 1-3
Clipper Monitor ........................................................................................................................... 1-3
Power ......................................................................................................................................... 1-3
Dimensions ................................................................................................................................ 1-3
Chassis Types ............................................................................................................................ 1-3
Chapter 2 .........................................................................................................................2-1
Installation .......................................................................................................................2-1
Installation into a Chassis........................................................................................................... 2-1
Chapter 3 .........................................................................................................................3-1
Operation .........................................................................................................................3-1
Filters.......................................................................................................................................... 3-1
SE-DIFF Switch (Rear Panel) .................................................................................................... 3-4
Master Gain Control ................................................................................................................... 3-4
Clipper Set Control ..................................................................................................................... 3-4
Gain Set Control ......................................................................................................................... 3-5
SE-ISO Switch (Rear Panel) ...................................................................................................... 3-5
Interlock Circuit .......................................................................................................................... 3-5
6 Module (ISO-COM) ................................................................................................................. 3-5
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List of Figures
Figure 1-1, 200B Clipper Module (Front View) ...................................................................................1-1
Figure 1-2, 200B Clipper Module (Rear View) ....................................................................................1-2
Figure 3-1, 200B Printed Circuit Board Layout ...................................................................................3-2
Figure 3-2, Filter 1 Equalizer Frequency Response ...........................................................................3-2
Figure 3-3, Filter 2 Equalizer Frequency Response ...........................................................................3-3
Figure 3-4, Filter 3 Equalizer Frequency Response ...........................................................................3-3
Figure 3-5, Filter 4 Equalizer Frequency Response ...........................................................................3-4
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List of Tables
Table 2-1, 200B Proper/Operational Connections ............................................................................. 2-1
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DOCUMENT CHANGE HISTORY
Revision
Date
A
06/13/2011
Astronics Test Systems
Description of Change
Document Control release
v
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Chapter 1
Introduction
The 200B Clipper Module is designed to provide constant drive to the Air
Modulator Valve over the rated frequency range, and to prevent over modulation
of the valve during either a sine or random acoustic test.
The unit has selectable filters compatible with EPT 948, EPT 200, EPT 110, or
EPT 1094 Electro Pneumatic Modulator Air Valves.
Figure 1-1, 200B Clipper Module (Front View)
Features include:
•
•
•
•
•
•
•
•
Master gain control
10:1 clipper ratio
SE-ISO output
Install up to six modules in a chassis
Clipper set control
Single-ended (SE) or Differential (Diff) Input
Interlock circuit
115 or 230 VRMS selectable power input
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Introduction 1-1
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Figure 1-2, 200B Clipper Module (Rear View)
Description
The 200B/Clipper Module is designed to provide clipping with an adjustable clipper
ratio and filters to accommodate four different Electro Pneumatic modulator valves
used in acoustic testing.
Specifications
Signal Input
Impedance
Greater than100 K Ohms
Maximum Level
2 Volts RMS
Frequency Response
5 Hz to10 KHz
SE-DIFF Switch
Selects SE (single ended) or
DIFF (differential Input)
Introduction 1-2
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200B User Manual
Signal Output
Impedance
Less than 50 Ohms
Maximum Level
30 volts pk to pk
Distortion (No Filter)
1% 10 Hz to 2 kHz
SE-ISO Switch
Selects SE (single ended) or
ISO (isolated) output
Clipper Monitor
Impedance
Less than 100 Ohms
Clipper Ratio
Adjustable from 10 to 1
Power
115 or 230 VRMS (50 or 60 Hz)
Less than 20 watts
Dimensions
7” (H) x 2.7” (W) x 14” (D)
Chassis Types
19” (wide) by 7” (high) rack-mounted chassis
TT-4416
Single, portable carrier
TT-4216
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Introduction 1-4
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Chapter 2
Installation
Installation into a Chassis
When the unit is received, unpack and inspect it for shipping damage.
Up to six of the 200B Clipper modules can be installed in a 19” x 7” rackmounted chassis (TT-4116). Proper connections for the unit are listed in Table
2-1.
Mount the chassis into a 19-inch relay rack using binder head screws (10-32 x
1/2). Install the modules into the chassis. Make the operational connections
described in Table 2-1.
The 200B Clipper module can also be installed in a single, portable carrier
(TT-4216) as shown in Figure 1-1.
Table 2-1, 200B Proper/Operational Connections
Connection
INPUT
CLIPPER MONITOR
CLIPPER OUTPUT
BNC J1-2 Center
Input Signal to 200B
BNC J1-1 Shell
Toggle switch SE or DIFF
BNC Center
Signal from clipper circuit
BNC Shell
Signal from ground
BNC Center
Clipper Output
BNC Shell
Toggle switch SE-ISO
115 or 230 V 50/60 Hz, primary power
Caution: ensure that S6 switch on the 200B
circuit board is properly positioned for
voltage used.
AC PWR INPUT
INTERLOCK
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Function
SP
Spare
TB1–(GND)
Digital GND
TB1–RST
Connect RST to GND for EXT Reset
TB1-LOGIC (TTL)
Interlock Logic (Output)
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Installation 2-2
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Chapter 3
Operation
The electronics for the 200B Clipper is packaged on a single printed circuit board
(Figure 3-1). An internal 115-230 switch (S6) selects for operation with 115 or
230 VRMS power.
WARNING
DO NOT APPLY 230V RMS power with the 115-230 switch in the
115 V position as it could damage the unit.
Prior to use with the acoustic system, the clipper RATIO FILTER selection and
GAIN must be set to accommodate the Pneumatic Modulator Air Volt being used.
Filters
The 200B has four filter profiles as shown in Figures 3-2 through 3-3. The
output of each filter can be selected by a movable jumper on the internal printed
circuit board (Figure 3-1). The filters are marked FILTER 1 thru FILTER 4, and
are designed to accommodate the different air modulators. (See Figure 3-2 for
the equalizer level versus frequency responses).
NOTE: The jumper locations are marked FILTER 1 thru FILTER 4. Remove
the jumper and select the appropriate Filter.
Astronics Test Systems
FILTER
MODULATOR
FILTER-1
EPT-948
FILTER-2
EPT-200
FILTER-3
EPT-110
FILTER-4
EPT-1094
Operation 3-1
200B User Manual
Publication No. 980954 Rev. A
FILTER 1
FILTER 2
FILTER 3
FILTER 4
JP5
EXT
INT
S6
230
115
Figure 3-1, 200B Printed Circuit Board Layout
24
20
16
12
Gain at
580Hz - 6
Output
(dB)
8
4
0
10
100
1000
Frequency (Hz)
Figure 3-2, Filter 1 Equalizer Frequency Response
Operation 3-2
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12 dB/oct
(dB)
6 dB/oct
10
5
0
100
1000
(Hz)
Figure 3-3, Filter 2 Equalizer Frequency Response
50
40
30
Output
(dB)
Gain at 370Hz = 6
20
10
0
100
10
1000
Frequency (Hz)
Figure 3-4, Filter 3 Equalizer Frequency Response
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Operation 3-3
200B User Manual
Publication No. 980954 Rev. A
50
40
30
Output
(dB)
Gain at 370Hz = 6
20
10
0
1000
100
10
Frequency (Hz)
Figure 3-5, Filter 4 Equalizer Frequency Response
SE-DIFF Switch (Rear Panel)
The position of the SE-DIFF toggle switch in the DIFF (differential) position
provides common mode when noisy grounds are encountered. When grounds
between the INPUT of the CLIPPER and the OUTPUT of the GENERATOR are
common the SE (single ended) position should be used.
Master Gain Control
When power is applied to the unit, the Interlock LED is illuminated and the output
is shorted to signal ground. When the MASTER GAIN is turned completely CCW
to detent, the LED goes out and the output short is removed. Set the MASTER
GAIN control to mid range.
Clipper Set Control
The setting of the Clipper Set Control requires a 200 Hz sinewave with a level of
200 mVRMS at the Signal Input. Turn the Clipper Set Control for a 1.41 ±.05
indicator on the Clipper Ratio Meter. When the operating signal is applied, this
control may need to be changed to accommodate the change in level at the
INPUT as corrected by the GAIN SET control setting.
Operation 3-4
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200B User Manual
Gain Set Control
With the controller input setting used for the test, adjust the GAIN SET control and
Power Amplifier GAIN as necessary to derive full modulation of the Pneumatic
Modulator air valves.
If the drive level at the input is increased or decreased, it will affect the CLIPPER
RATIO. Adjust the CLIPPER SET and GAIN SET for the desired operating level
and clipper ratio.
SE-ISO Switch (Rear Panel)
The purpose of the SE-ISO switch at the CLIPPER OUTPUT is to provide a way
to remove a ground problem if encountered. The switch will normally be in the SE
(single ended) position. If a ground problem exists, the ISO (isolated) position will
provide COMMON MODE between the grounds of the OUTPUT of the CLIPPER
and the INPUT to the POWER AMPLIFIER.
Interlock Circuit
The interlock circuit can be controlled either INT (Internally) or EXT (Externally).
JP5 jumper (Figure 3-1) marked INT-EXT should be placed in the desired
position.
When in the INT position, the interlock is RESET by the CCW detent of the
MASTER GAIN control. When the interlock is RESET, the LED is OUT. When in
the EXT position, the RESET is accomplished by removing the short between the
RST and the GND terminal, momentarily.
When the interlock LED is on, the TBI–LOGIC (TTL) will go Low indicating an
interlock condition. In the normal operation the LOGIC is high.
6 Module (ISO-COM)
The purpose of the ISO-COM Switch is to either connect the chassis ground to
Signal ground or isolate them from each other.
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Operation 3-5
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Operation 3-6
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