Astronics Trig-Tek 346B User manual

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Trig-Tek
346B
Synthesized Calibrator
User Manual
Publication No. 980956 Rev. A
Astronics Test Systems Inc.
4 Goodyear, Irvine, CA 92618
Tel: [phone]; Fax: [phone]
[e-mail] atss[email protected]om
[e-mail] 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:
http://www.astronicstestsystems.com/support/downloads
If you have any questions about software driver downloads or our privacy policy, please contact
us at:
[e-mail]
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: [e-mail]
Telephone: [phone] (USA)
Fax: [phone] (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: [e-mail].
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 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. 980956 Rev. A 346B User Manual
Astronics Test Systems i
Table of Contents
Chapter 1.........................................................................................................................1-1
Introduction.....................................................................................................................1-1
Specifications .................................................................................................................................1-2
Millivolts Output..........................................................................................................................1-2
DC Output Millivolt (plus/minus).................................................................................................1-3
Square Wave Output..................................................................................................................1-3
SWEEP INPUT ..........................................................................................................................1-4
Controls......................................................................................................................................1-4
Displays (2) ................................................................................................................................1-4
Dimensions ................................................................................................................................1-5
Power.........................................................................................................................................1-5
Chapter 2.........................................................................................................................2-1
Operation.........................................................................................................................2-1
Programming Functions.................................................................................................................2-1
Operation........................................................................................................................................2-2
Grounds .....................................................................................................................................2-2
Frequency Set Up ......................................................................................................................2-3
Level Set Up...............................................................................................................................2-4
Units and Modes ........................................................................................................................2-4
Programmable Files...................................................................................................................2-4
Segment Programming..............................................................................................................2-4
Remote.......................................................................................................................................2-5
Save/File ....................................................................................................................................2-6
Sweep Input and Sweep UP-DN................................................................................................2-7
RS 232 Bus Remote Operation......................................................................................................2-8
IEEE 488 Remote Operation........................................................................................................2-12
Installing IEEE Interface Board Assembly TT-3869.................................................................2-15
Chapter 3.........................................................................................................................3-1
Performance Test Procedure.........................................................................................3-1
General...........................................................................................................................................3-1
Test Equipment..............................................................................................................................3-1
Test Set Up ....................................................................................................................................3-1
Test Procedures.............................................................................................................................3-2
File: 99-Performance Test Program..........................................................................................3-3

346B User Manual Publication No. 980956 Rev. A
ii Astronics Test Systems
Chapter 4 ........................................................................................................................4-1
Calibration Procedure....................................................................................................4-1
Test Equipment...............................................................................................................................4-1
Procedure .......................................................................................................................................4-1
PC Output .......................................................................................................................................4-2
Distortion.........................................................................................................................................4-3
Chapter 5 ........................................................................................................................5-1
Trouble Shooting............................................................................................................5-1
Power Supply..................................................................................................................................5-1
Front Panel Keypad ........................................................................................................................5-1
Save & Recall..................................................................................................................................5-2
Frequency.......................................................................................................................................5-2
Level................................................................................................................................................5-2
.

Publication No. 980956 Rev. A 346B User Manual
Astronics Test Systems iii
List of Figures
Figure 1-1, 346B Synthesized Calibrator............................................................................................1-1
Figure 2-1, Front Panel Keypad.........................................................................................................2-2
Figure 2-2, Rear Panel Terminal Strip and BNCs..............................................................................2-3
Figure 2-3, 346B Layout...................................................................................................................2-15
Figure 4-1, 115-230 VAC Switch S1 ..................................................................................................4-1
Figure 4-2, Adjustment Resistor R2...................................................................................................4-2

346B User Manual Publication No. 980956 Rev. A
iv Astronics Test Systems
List of Tables
Table 3-1, Programming Functions ....................................................................................................2-1

Publication No. 980956 Rev. A 346B User Manual
Astronics Test Systems v
DOCUMENT CHANGE HISTORY
Revision Date Description of Change
A 05/18/2011 Document Control release

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vi Astronics Test Systems
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Publication No. 980956 Rev. A346B User Manual
Astronics Test Systems Introduction 1-1
Chapter 1
Introduction
The 346B Synthesized Calibrator unit, Figure 1-1, provides frequencies from
0.1Hz to 99999.9Hz in 0.1 Hz steps. The signal output is in millivolt and
picocoulomb levels with selected units of RMS, pk, pk-pk, or DC. Levels from
0.010 to 9999 millivolts or picocoulombs can be selected. The Frequency and
Level can be set either by the keypad on the front panel (local) or by the bus
(remote). Remote operation is an optional feature. The unit operates as a stand-
alone unit without the remote bus. Frequency accuracy is 2 parts in 100,000 and
the level accuracy is 0.5% of set level ±0.2% of full scale.
Figure 1-1, 346B Synthesized Calibrator
The unit has non-volatile memory capacity to hold 24 files of 31 segments. Each
of the 31 segments can have different frequency, level and units. The segment
can be stepped manually or a dwell time between 1 and 9 seconds can be used to
step through the segments.
Integrated circuitry is used throughout. The components are packaged on a
printed circuit board with an integral power supply. A rack mount kit is provided
and the unit dimensions are 3.5” high, 19” wide, and 13” deep.
The MILLIVOLT output is converted to picocoulomb at the PICOCOULOMB
output. The frequency is the same; the picocoulomb level is the same as the
millivolts ±0.3%.

346B User Manual Publication No. 980956 Rev. A
Introduction 1-2 Astronics Test Systems
Specifications
Millivolts Output
Impedance Less than 20 Ohms.
Connector BNC (front and rear panels).
Waveform Sinewave
Operating Temperature 0º to 70º C
Storage Temperature -20º to 85º C
Level 9.999, 99.99, 999.9, or 9999 mV full scale
with RMS, PEAK, or PK-PK units.
Freq Range 0.1 Hz–99999.9 Hz
Distortion 5 Hz to 10,000 Hz
5 Hz to 5000 Hz 0.25%
5000 to 10,000 Hz 0.5%
10,000 to
99999.9 Hz 1%
Accuracy (Freq Set) ±20 ppm (0º to 70º C)
Level Set Accuracy 0.5% of settings ±0.2% FS from 1 Hz to
100 kHz.
Resolution 9999 mV Range 10 mV
999.9 mV Range 1 mV
99.99 mV Range 0.1 mV
9.999 mV Range 0.01 mV
Waveform: Triangular Wave
Level 9.999, 99.99, 999.9 or 9999 mV FS pk-pk
units
Level Set Accuracy 2% of settings ±0.3% FS 0.1 Hz to
100 kHz
Waveform: Square Wave
Rise/fall time (10%-90%) Less than 1.2 µsec
Asymmetry (@ 10 kHz) Less than 1%

Publication No. 980956 Rev. A346B User Manual
Astronics Test Systems Introduction 1-3
Level 9.999, 99.99, 999.9 or 9999 mV FS pk-pk
units
Level Set Accuracy 2% of setting ±0.3% FS
DC Output Millivolt (plus/minus)
Impedance Less than 10 ohms.
Level 9.999, 99.99, 999.9 or 9999 mV DC full
scale.
Level Set Accuracy ±0.5% of setting ±0.2% FS
Resolution 9999 mV Range 1 mV
999.9 mV Range .1 mV
99.99 mV Range .01 mV
9.999 mV Range .001 mV
Square Wave Output
Impedance Less than 1k ohm (5 mA max)
Waveform Square wave.
Level 0 to 4 V ±1 Volt.
Rise/Fall Time Less than 1.0 µsec

346B User Manual Publication No. 980956 Rev. A
Introduction 1-4 Astronics Test Systems
SWEEP INPUT
Wave Shape Square wave 0 to 5 Volt level.
Frequency Frequency equals 0.1 Hz/sec
(10Hz input is 1 Hz/sec).
Controls
Power Switch Applies power to circuit, when ON.
Keypad Frequency Selector Six digit selection by keypad for 0.1Hz
resolution.
Level Selector Four digits 0.010–9999 settings of level.
Control Selects RMS, Peak, pk-pk or DC units at
the output
Displays (2)
6 digit LED display (frequency)
4 digit LED display (amplitude)
5 LED's indicate (SEGMENT NUMBER)
4 LED's indicate (functions)
4 LED's indicate (units)
2 LED's indicate PROG (program)
or REM (remote)

Publication No. 980956 Rev. A346B User Manual
Astronics Test Systems Introduction 1-5
Dimensions
3.5" high
19" wide
13" deep
Power
Operates either 115 or 230 V RMS AC power 50-400 Hz, at approximately 25
watts.

346B User Manual Publication No. 980956 Rev. A
Introduction 1-6 Astronics Test Systems
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Publication No. 980956 Rev. A346B User Manual
Astronics Test Systems Operation 2-1
Chapter 2
Operation
Programming Functions
Table 3-1, Programming Functions

346B User Manual Publication No. 980956 Rev. A
Operation 2-2 Astronics Test Systems
Operation
The 346B Synthesized Calibrator generates signals with frequencies from 0.1 Hz
to 99999.9 Hz with 0.1 Hz resolution. The level of the signal can be set from 0.1
to 9999 millivolts or picocoulombs. It can generate sinewave, triangle wave,
square wave, and DC. The following is a description of how to set the different
parameters using the front panel keypad, Figure 2-1.
Turn the unit on by placing the power switch to ON position.
Figure 2-1, Front Panel Keypad
Grounds
There are two grounds on the terminal strip on the back panel of the unit, Figure
2-2, marked SIG for signal ground and CHAS for chassis ground The signal
ground is the same ground as all the output BNC connectors. The chassis ground
is connected to the chassis and the third wire on the input power line. These two
grounds are connected together on the terminal strip when it is shipped from the
factory. Separate the grounds, if the chassis ground of this 346B is not the same
as the unit being tested.

Publication No. 980956 Rev. A346B User Manual
Astronics Test Systems Operation 2-3
Figure 2-2, Rear Panel Terminal Strip and BNCs
Frequency Set Up
To set a new frequency, press the key. Enter the desired frequency
using the keypad. Do not enter any decimal point, since the decimal point is
always on the same location (0.1 Hz resolution). For example, to set the
frequency for 250.0 Hz, press the following keys:
After the key is pressed, the PROG light will go off and the signal with
the new frequency will be at the output jacks.
In order to increase or decrease the frequency by the and keys, simply
press the key and then the and keys. This will increase and
decrease the Frequency setting of the unit.