Elgar 400 Series User manual

Artisan Technology Group is your source for quality
new and certied-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
REMOTE INSPECTION
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specications, manuals, and documentation
Contact us: (888) 88-SOURCE | [e-mail] | www.artisantg.com
SM
View
Instra

PLUG-IN
OSCILLATORS
SERIES 400
ELGAR ELECTRONICS CORPORATION
9250 Brown Deer Road
San Diego, CA 92121-2294
1-800-733-5427
Tel: [phone]
Fax: [phone]
Email: [e-mail]
www.elgar.com
©1985 by Elgar Electronics Corporation
This document contains information proprietary to Elgar Electronics Corporation. The information contained herein is
not to be duplicated or transferred in any manner without prior written permission from Elgar Electronics Corporation.
July, 1985 Document No. 604-069-90 Rev A
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

ELGAR TWO-YEAR WARRANTY
Elgar Electronics Corporation (hereinafter referred to as Eiger) warrants its products to be free from defects
in material and workmanship. This warranty is effective for two years from the date of shipment of the
product to the original purchaser. Liability of Eiger under this warranty shall exist provided that:
•the Buyer exposes the product to normal use and service and provides normal maintenance on the
product;
•Eiger is promptly notified of defects by the Buyer and that notification occurs within the warranty period;
•the Buyer receives a Return Material Authorization (RMA) number from Elgar's Repair Department prior to
the return of the product to Eiger for repair, phone 800-73-ELGAR (800-733-5427), ext. 2295;
•the Buyer returns the defective product in the original, or equivalent, shipping container;
•if, upon examination of such product by Eiger it is disclosed that, in fact, a defect in materials and/or
workmanship does exist, that the defect in the product was not caused by improper conditions, misuse,
or negligence; and,
•that Eiger QA seal and nameplates have not been altered or removed and the equipment has not been
repaired or modified by anyone other than Eiger authorized personnel.
This warranty is exclusive and in lieu of all other warranties, expressed or implied, including, but not limited
to, implied warranties of merchantability and fitness of the product to a particular purpose. Eiger, its agents,
or representatives shall in no circumstance be liable for any direct, indirect, special, penal, or consequential
loss or damage of any nature resulting from the malfunction of the product. Remedies under this warranty
are expressly limited to repair or replacement of the product.
CONDITIONS OF WARRANTY
•To return a defective product, contact an Eiger representative or the Eiger factory for an RMA number.
Unauthorized returns will not be accepted and will be returned at the shipper's expense.
•For Eiger products found to be defective within thirty days of receipt by the original purchaser, Eiger will
absorb all ground freight charges for the repair. Products found defective within the warranty period, but
beyond the initial thirty-day period, should be returned prepaid to Eiger for repair. Eiger will repair the unit
and return it by ground freight pre-paid.
•Normal warranty service is performed at Elgar during the weekday hours of 7:30 am to 4:30 pm Pacific
time. Warranty repair work requested to be accomplished outside of normal working hours will be subject to
Eiger non-warranty service rates.
•Warranty field service is available on an emergency basis. Travel expenses (travel time, per diem expense,
and related air fare) are the responsibility of the Buyer. A Buyer purchase order is required by Eiger prior to
scheduling.
•A returned product found, upon inspection by Elgar, to be in specification is subject to an inspection fee and
applicable freight charges.
•Equipment purchased in the United States carries only a United States warranty for which repair must be
accomplished at the Eiger factory.
ELOZIR
Committed to Quality...Striving for Excellence
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

TABLE OF CONTENTS
1-1 INTRODUCTION 1-1
1-3 GENERAL DESCRIPTION 1-1
1-5 PURPOSE OF EQUIPMENT 1-1
1-8 RESISTANCE PROGRAMMING 1-2
1-12 TANDEM OPERATION 1-2
2-1
2-3
2-6
2-8
2-10
INTRODUCTION
UNPACKING THE INSTRUMENT
INSTALLATION
OPERATION
OPERATION WITH EXTERNAL SYNC
2-1
2-1
2-1
2-1
2-3
2-12 INTERCONNECTIONS FOR TWO OR THREE PHASE
OPERATION 2-3
2-15 EXTERNAL SIGNAL 2-3
SECTION III
THEORY OF OPERATION
3-1 INTRODUCTION 3-i
3-3 .01% AND .0001% OSCILLATOR CIRCUIT
DESCRIPTION 3-1
3-5 .1% OSCILLATOR CIRCUIT DESCRIPTION 3-1
3-7 TWO-PHASE AND THREE-PHASE OSCILLATORS 3-3
3-10 OSCILLATOR POWER SUPPLIES 3-3
4-1 SERVICE INFORMATION 4-1
4-3 FACTORY REPAIR 4-1
4-5 SHIPPING DAMAGE 4-1
4-7 TEST POINTS 4-1
4-10 TROUBLESHOOTING 4-2
"-15 PHASE-ANGLE ADJUSTMENT 4-2
SECTION I
INTRODUCTION AND GENERAL DESCRIPTION
Paragraph T!Title Page
SECTION II
INSTALLATION AND OPERATION
SECTION IV
MAINTENANCE
SECTION V
DIAGRAMS
5-1
5-3 GENERAL
DIAGRAMS 5-1/5-2
5-1/5-2
iii
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

TABLE OF CONTENTS (Continued)
Paragraph
6-1
6-3 SPARE PARTS ORDERING
LIST OF FIGURES
Title Page
SECTION VI
REPAIR PARTS LIST
GENERAL 6-1
6-1
Figure Title Page
1-1 MODEL NUMBERING SYSTEM 1-1
2-1 TYPICAL PLUG-IN OSCILLATOR/POWER SOURCE
CONNECTION 2-2
2-2 2 AMPLIFIER 30 WYE CONFIGURATION 2-4
3-1 TWO- AND THREE-PHASE CIRCUIT BLOCK DIAGRAM 3-2
3-2 REAR PANEL CONNECTORS FOR TWO- OR
THREE-PHASE OPERATION 3-4
5-1 COMPONENT LAYOUT FOR 0.11i OSCIL-
LATORS 5-3/5-4
5-2 SCHEMATIC FOR 0.1% OSCIL-
LATORS 5-5/5-6
5-3 COMPONENT LAYOUT FOR 0.01$ OSCIL-
LATORS 5-7/5-8
5-4 SCHEMATIC FOR 0.01% OSCIL-
LATORS 5-9/5-10
Table
LIST OF TABLES
Title Page
3-1 OUTPUT FREQUENCY, I.C. SELECTION 3-2
6-1 RESISTOR, CAPACITOR VALUES 6-6
iv
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SECTION I
INTRODUCTION AND GENERAL DESCRIPTION
1-1. INTRODUCTION
1-2. This manual describes the Series 400 plug-in oscillators manufactured by
Elgar Corporation for use with the Elgar Power Sources. The manual contains
installation, operation, maintenance instructions, circuit descriptions, circuit
diagrams, and parts lists.
1-3. GENERAL DESCRIPTION
1-4. The Elgar oscillators are contained in a plug-in enclosure which can be
inserted into the front panel opening of an Elgar Power Source. The plug-in
enclosure contains a horizontally-mounted printed circuit board, and a ter-
minal connector which mates with a similar connector in the power source. The
0.1% model is provided with a front panel access hole for a screwdriver fre-
quency adjustment. The oscillators are available in 50, 60, and 1400 Hz output
frequencies, or any frequency from 45 to 10 kHz on special order.
1-5. PURPOSE OF EQUIPMENT
1-6. The Elgar Series 400 plug-in oscillators provide stable input frequency
sianals for the Elgar Power Sources. The plug-in provide frequency accuracy
XX .XX
FREQUENCY TOLERANCE (Refer to Note 1)
NUMBER OF PHASES (Refer to Note 2)
FREQUENCY (Refer to Note 3)
400 SERIES PLUG-IN OSCILLATOR
EXAMPLE:
44 2 .01
0.01% FREQUENCY ACCURACY
2•PHASE OSCILLATOR
400 Hz OUTPUT FREQUENCY
400 SERIES PLUG•IN OSCILLATOR
NOTES:
1. Tolerances are 0.001%. .01% and 0.1%
2. Available in 1-, 2-, or 3-phase.
3. 5 = 50 Hz; 6 • 60 Hz; 4 • 400 Hz:
Figure 1-1. Model Numbering System
1-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

of 0.1%, 0.01%, and 0.0001% (see Figure 1 for an explanation of model number-
ing). The 0.01% and 0.0001% oscillators use a crystal-controlled oscillator. In
the 0.1% models, a square wave is generated by positive feedback around the
filter to generate the basic frequency signal which is filtered in two series
operational amplifier filters. Frequency adjustments may be made from the front
panel.
1-7. In the 0.01% and 0.0001% models, the crystal oscillator output is divided
through a series of integrated circuit flip-flops to obtain the desired output
frequency. The output of the frequency divider flip-flops is filtered in two
operational filters connected in series.
1-8. RESISTANCE PROGRAMMING
1-9. When an Eiger plug-in oscillator has been equipped for resistance pro-
gramming of the output voltage of the AC Power Source, the model number will
indicate so by including a "P" at the end of the number.
1-10. Resistance programming is accomplished by connecting an external
resistor between pins 11 and 12 of connector .11, located on the rear panel of
the AC Power Source. The value of the resistor is typically 100 ohms per volt,
referenced to the output of the AC Power Source on the 0.0 to 130V range.
1-11. The external resistor is in fact taking the place of the feedback resistor
in the operational amplifier circuit of the oscillator. It is important to know
that during initial calibration this resistor must be matched to the input resis-
tor of the operational amplifier to obtain a gain of 1: Once this is accom-
plished the front panel amplitude control may be rotated to the desired full
scale output voltage on the AC voltage meter located on the front panel of the
power source. The reading is typically 130V and in effect provides the 500
ohms per volt calibration.
1-12. TANDEM OPERATION
1-13. For all single phase Series 400 plug-in oscillators whose model number
ends in a T (4X1.XXT) R115, a 1475 ohm, 1% resistor and a jumper between
pins 9 and 21 have been added for tandem operation.
1-14. For all two or three phase oscillators whose model number ends in a T
(4X3.XXT) a jumper has been added between pins 9 and 21 for tandem opera-
tion. (Note: R115 is already present.)
1-15. The addition of the jumper between pins 9 and 21 enables the master AO
signal to also be routed to the slave unit allowing the system to be operated in
the tandem configuration.
1-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SECTION II
INSTALLATION AN OPERATION
2-1. INTRODUCTION
2-2. The Elgar plug-in oscillators are aligned, calibrated, and tested prior to
shipment. The instrument is therefore ready for immediate use upon receipt.
The following checks should be made however, to assure that the instrument
has suffered no damage during shipment.
2-3. UNPACKING THE INSTRUMENT
2-4. Make a visual inspection of the shipping container prior to accepting the
package from the carrier. If extensive damage to the shipping container is
evident, a description of the damage should be noted on the carrier's receipt,
and signed by the driver or carrier agent. If damage is not apparent until the
instrument is unpacked, a claim for concealed damage should be placed with the
carrier and all shipping containers and filler material saved for inspection.
Forward a report of damage to the Elgar Service Department, which will provide
instructions for repair or replacement of the instrument.
2-5. Visually inspect the instrument for physical damage when it is removed
from shipping container. Test functional operation of instrument as soon as
possible. If damage is evident, or instrument does not function properly,
notify the carrier immediately. Carrier's claim agent will prepare a report of
damage to be forwarded to the Elgar Service Department. You will be advised
as to the action necessary to have the instrument repaired or replaced.
2-6. INSTALLATION
2-7. The oscillator is quickly and easily installed by plugging it into the
space provided on the front panel of the Elgar Power Source. When the oscil-
lator is fully inserted, and the captive screws secured, the unit is ready for
operation.
NOTE
Remove power from Power Source when installing
oscillator.
2-8. OPERATION
2-9. After installation in the Elgar Power Source, the oscillator operates
automatically, receiving its power from the power source. The amplitude of
2-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

PLUG-IN OSCILLATOR
2ND
FILTER
OUT
TYPICAL
PLUG-IN
OSCILLATOR
MODULE
FROM 0
SHIFTERS IN LCO
P2
RIM
AC POWER SOURCE
J2
-111111111111-s-
220•0
31
200- a
18 0•••••0
170•'-'O
180
MULTI-PHASE OSCILLATORS
15
14 0,•••4'.)
13 0..C.J
12 il-17
11
100-0
9
80
70
-42VDC
r- +42VDC
60
5
2
3
4
5
O6
40
3
2
1
O-7
8
O9
10
11
012
J1
FRONT PANEL
AMPLITUDE
CONTROL
J1 IS LOCATED
ON REAR OF
POWER SOURCE
Figure 2-1. Typical Plug-In Oscillator/Power Source Interconnection
2-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

of the power source output is controlled by the AMPLITUDE control on the
front panel of the power source.
2-10. OPERATION WITH EXTERNAL SYNC
2-11. The .1$ oscillators with model numbers ending in "ES" are equipped for
external synchronization. The external sync signal should be approximately
10V peak-to-peak either sine or square wave. This signal is transformer
isolated in the oscillator to avoid cross-grounding problems. The external sync
terminals are connected to pins 11 and 12 of J1, on the rear panel of the Elgar
Power Source. The phase angle between the power source output and the syn-
chronizing signal is a function of the synchronizing signal amplitude and wave-
shape and the difference between the oscillator free-running frequency and the
sync signal frequency. Figure 2-1 illustrates a typical plug-in Oscillator/AC
Power Source Interconnection.
2-12. INTERCONNECTIONS FOR TWO OR THREE PHASE OPERATION
2-13. Three-phase oscillators may be installed directly in Elgar three-phase
power sources without special connections. Where two-phase or three-phase
power is made up by stacking two or three of the Elgar single-phase power
sources, the oscillator is installed in the A-phase power source. Oscillator
signals are carried to the B-phase and C-phase power sources through a cable
(furnished with the oscillator) interconnecting the J1 sockets on the rear panels
of the power source. The B-phase and C-phase power sources must have Model
4008 and 400C signal routing plug-ins installed to complete the signal inter-
connections. The front panel AMPLITUDE control on the A-phase power sources
acts as a master control to vary all the output simultaneously, while the B-
phase and C-phase AMPLITUDE controls act merely as balance controls to set
the B-phase and C-phase output voltages equal to the A-phase output voltage.
2-14. With those single-phase Elgar Power Sources which have dual output
windings, two power sources may be interconnected for three-phase wye opera-
tion. One of the output windings on each of the A-phase and B-phase sources
is used for the A-phase and B-phase outputs. The C-phase output is synthe-
sized by inverse series connection of the remaining two windings, as diagram-
med in Figure 2-2.
2-15. EXTERNAL SIGNAL
2-16. Single-phase 0.1% and 0.01% oscillators are equipped with a front-panel
closed-circuit jack for external signal operation. A 2-3V RMS external signal
may be introduced through a jack on the oscillator front panel. The closed-
circuit jack automatically disconnects the internal signal. The front panel
amplitude control is effective with the external signal connection.
2-3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SYNTHESIZED
CO
BO
A0
Figure 2-2. .2 Amplifier 30 Wye Configuration
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SECTION III
THEORY OF OPERATION
3-1. INTRODUCTION
3-2. The Elgar Series 400 plug-in oscillators all use similar low voltage
supplies and operational amplifier filters, and obtain operating power from the
Elgar Power Source. The amplitude of the output signal for all units is con-
trolled by an amplitude control potentiometer located on the front panel of the
AC Power Source. The .1% models use a positive feedback square wave input to
the operational amplifier filters. The .01% and .0001% oscillator contain a
crystal-controlled oscillator and a frequency-dividing circuit formed by TTL
integrated circuits. The output of the integrated circuits is a symmetrical
square wave free from even harmonics.
3-3. .01% AND .0001% OSCILLATOR CIRCUIT DESCRIPTION
3-4. The .01% oscillators generate the output frequency by means of a
crystal-controlled oscillator formed by 0111 and Q112. In .0001% oscillators
this circuit is replaced with an oven-controlled oscillator module. Both oscil-
lators operate at a frequency of 153.6 kHz. The square wave at the collector
of 0112 or at the output of the oscillator module is then counted down to the
operating frequency by integrated circuit counters 2106, Z107 and Z108. The
square wave at the output of the counters is then used to drive Q113, oper-
ating as a saturated switch. T.C. zener diode CR103, connected from collector
to emitter of Q113, limits the positive half cycle of the square wave to approxi-
mately +6.2V. The symmetrical square wave at the collector of Q113 is then
taken to the input of the first active filter consisting of operational amplifier
Z101 and filter-tuning components R122, R123, R124, C103 and C104. The output
of Z101 is then taken to the input of the second active filter consisting of Z102
and tuning components R127, R128, R129, C105 and C106. Action of this two-
section active low-pass filter is to remove harmonics from the square wave
and thereby produce a pure sine wave at the output of Z102 whose amplitude is
approximately 3V RMS. The active filters are tuned for a peak response at the
operating frequency and have a total of 180° phase shift. Refer to the table at
the bottom of Figure 5-4 for filter tuning values. Table 3-1 details Z106-Z108
for various output frequencies.
3-5. .1% OSCILLATOR CIRCUIT DESCRIPTION
3-6. .1% oscillators also operate by generating a square wave and then fil-
tering it in a two-section action low-pass filter. However, in these oscillators
the square wave is generated by positive feedback around the filter through a
voltage comparator. Referring to Figure 5-2, the output of the second filter
3-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

OSC. SIGNAL
FREQUENCY 1> '.
10 KHz MC7490P
9.6 KHz MC7493P
4.8 KHz MC7493P MC7493P
3.2 KHz MC7492P MC7493P
1.2 KHz MC7493P MC7493P
800 Hz MC7492P MC7493P
400 Hz MC7492P MC7493P MC7493P
60 Hz MC7490P MC7493P MC7493P
50 Hz MC7492P MC7493P MC7493P
0•P2
Figure 3-1. Two- and Three-Phase Circuit Block Diagram
TABLE 3-1. OUTPUT FREQUENCY, I.C. SELECTION
3-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

drives the voltage comparator Z106 through R116. The square wave at the
output of Z106 is limited to +6.2V by T.C. zener diode CR103. The square
wave is then coupled to the two-section active filter whose operation is ex-
plained in Paragraph 3-4. above. R130 in the second active filter is used to
adjust the frequency over a small number of cycles around the nominal output
frequency. Initial frequency tuning is accomplished by factory-selected trim
capacitors in the two active filters.
3-7. TWO-PHASE AND THREE-PHASE OSCILLATORS
3-8. In two-phase and three-phase oscillators, the oscillator signal from the
AMPLITUDE control arm in the A-phase power amplifier is buffered by unity
gain amplifier Z105 and applied to two operational amplifier all-pass phase
shifters, Z103 and Z104. A block diagram of circuitry used to generate two-
and three-phase signals is provided in Figure 3-1. In three-phase oscillators,
the B-phase signal lags the A-phase signal by 120° and the C-phase signal lags
the B-phase signal by 120°. In two-phase oscillators the B-phase signal lags
the A-phase signal by 90° and the C-phase components are omitted. The B-
phase and C-phase signals are connected through plug-in connector P2 to the
12-pin Jones 53I2AB receptacle, J1, on the rear of the A-phase power source.
Interconnecting cables then carry these signals to the B-phase and C-phase
power sources in stacked amplifier systems (see Figure 3-2).
3-9. The A-phase AMPLITUDE controls acts as a master control to control the
amplitude of all three phases simultaneously. When single-phase power ampli-
fiers are stacked for two- or three-phase power, the B-phase and C-phase am-
plitude controls are used only as balance adjustments to set the B-phase and
C-phase outputs equal to the A-phase output.
3-10. OSCILLATOR POWER SUPPLIES
3-11. The oscillator circuitry is operated from plus and minus 15VDC regulated
power supplies which are derived from the unregulated plus and minus 42VDC
power supplies in the associated power source. -In the plus 15V power supply,
differential pair Q103 and Q104 compare the plus 15V regulated output to the
reference voltage from CR102, developing an error signal to control compound-
connected pass transistors Q101 and Q102. R102, R103, and CR101 ensure that
the regulator starts when power is applied. R101 limits the fault current if the
+15V output is accidentally shorted.
3-12. The minus 15V regulator, differential pair Q107 and Q108 develop the
error signal by comparing the -15V regulated output to the regulated +15V.
The error signal is used to control compound-connected pass transistors Q106
and Q107. R109 limits the fault current if the -15V output is accidentally
shorted.
3-3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

2-PHASE
28V
CEE CZ
;IMO
B
.. .
., • i ip r ti I 1
e
-- ..- .
==a
I
3-PHASE OPEN— DELTA
t208V)
2AMPLIFIER WYE
(28v1
••
eE
3-PHASE OPEN-DELTA
(28V)
A
B
C
i•
OCR
3-PwASE OPEN-
DELTA MeV)
2AMPLIFIER
WYE (115V)
3AMPLIFIER WYE
Acii5v)
Ar2svl
B(1:5v)
Figure 3-2. Rear Panel Connectors for Two- or Three-Phase Operation
3-L4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SECTION IV
MAINTENANCE
Square Wave .6V P-P
First Filter 10V P-P
Second Filter se 10V P-P
B-Phase s10V P-P sine wave
C-Phase ot 10V P-P sine wave
4-1. SERVICE INFORMATION
4-2. Questions concerned with the operation, repair, or servicing of this instrument
should be directed to the Elgar Repair Department, Elgar, 9250 Brown Deer Road,
San Diego, CA 92121-2294. Include the model number and serial number in any
correspondence concerning the instrument.
4-3. FACTORY REPAIR
4-4. Should it be necessary to return an instrument to the factory for repair, please
contact the Elgar Repair Department for authorization to make shipment. DO NOT
RETURN THE UNIT FOR REPAIR WITHOUT AUTHORIZATION.
4-5. SHIPPING DAMAGE
4-6. It is possible for equipment to be damaged in shipment. Therefore, it is
imperative that the instrument be tested and inspected as soon as it is received. If
the instrument shows signs of damage, notify the carrier immediately. The carrier's
claim agent will prepare a report of damage to be forwarded to the Elgar Repair
Department. You will be advised as to the action necessary to have the instrument
repaired or replaced.
4-7. TEST POINTS
4-8. Test points on the plug-in oscillator are shown in Figure 5-1 and Figure
5-3. These test points are accessible by removing the top cover of the power
source.
4-9. The outputs of the various test points are as follows:
4-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

4-10. TROUBLESHOOTING
4-11. Whenever trouble is suspected in the plug-in unit, substitution of a unit
known to be good will provide a quick check. If it is determined that trouble
does exist in the plug-in unit, the first step is a check of the +15VDC and
-15VDC. If the output is greatly reduced, check the oscillator operation at the
collector or Q113. If a square wave of the proper frequency and amplitude is
present, the trouble may be in the filter. Check the output of the first filter
section at '0106.
NOTE
If a crystal-controlled oscillator is not working,
check the crystal. Dropping the unit, or other
rough handling may fracture the crystal.
4-12. Troubleshooting is accomplished by signal tracing at the test points
shown in Figure 5-1 and Figure 5-3. For the crystal-controlled models, test
for a signal at the crystal oscillator, the flip-flop dividers, a square wave at
CR103 and a sine wave at the two filter outputs, and at the B- and C-phase
outputs.
4-13. If no output is present on the 0.1$ model, inject a 3V RMS signal at
appropriate frequency through a 3.3K resistor into pin 3 of Z103. Check for
6.2V peak-to-peak signal at CR103 and for correct signals at the filter and B-
and C-phase outputs.
4-14. The output frequency of the 0.0001$ oscillator is adjustable by a screw-
driver adjustment at the top of the oscillator module. Access is gained to this
adjustment by removing the top cover of the power source. Allow a 30-minute
warmup period. Do not change frequency setting unless a frequency standard
of adequate accuracy is available for comparison.
4-15. PHASE-ANGLE ADJUSTMENT
4-16. The phase-angle adjustments are set at the factory and should not be
disturbed unless appropriate test equipment is available to determine the output
phase angles. If an accurate phase-angle meter is not available, phase angles
may be determined by line-to-line voltage measurements. The front-panel volt-
meters in the Elgar power sources are only accurate to 1:3$ and are not suitable
for precision phase angle adjustment.
4-17. Open Delta Connection: Set the two amplifier outputs ECA and Eriz to
120V. Adjust B-phase, R136, until the line-to-line voltage EAB equals n7.94
volts. The C-phase adjustment, R133, has no effect.
4-19. 3-Amplifier Wye Connection: Set the amplifier outputs, ENA, Skim, and
E. to 120V. Adjust B-phase, R136, for line-to-line voltage equart to 2r7.94
vOIrs. Adjust C-phase, R133, for line-to-line voltage EAC equal to 207.84
volts.
4-20. 2-Phase Connection: Set both amplifier outputs to 120V. Adjust
B-phase, R136, until line-to-line voltage EAB equals 169.71 volts.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

SECTION V
DIAGRAMS
5-1. GENERAL
5-2. This section contains the schematic diagrams and parts layout for the
Series 400 Plug-In Oscillators. The schematic diagrams should be used to
understand the theory of operation and as an aid in troubleshooting the unit.
Reference designators shown on schematics correspond to reference designators
shown in parts lists where exact component values are given.
5-3. DIAGRAMS
5-4. Diagrams included in this section are as follows:
a. Component Layout for 0.1% Oscillators.
b. Schematic Diagram for 0.1% Oscillators.
c. Component Layout for 0.01% Oscillators.
d. Schematic Diagram for 0.01% Oscillators.
5-6. The schematics included in this section use Q to indicate P2 and
to indicate pins related to Connector J1. J1 is located on the rear panel of the
AC Power Source and P2 is the pins of the oscillator board which plug into
Receptacle Connector J2 of the AC Power Source.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

,M•• mow MESE, 411M• 4•11,
1
•4.1our
nu nrA
Via
0"
+701Z
30 ONLY
L
COUT'
RES PROGRAM
ONLY
I
•••• mom ammo ••••
o
••••
20 30 oNLY
-J
ammo *NIP WIN
61 0 OUT
MM. •••••• AND
MEP AMP • 411M. 41••=. OM, 4IM• OM. 4111•••
+6.2, ••••• MEMID •••••=.
20.30
2ro PIL OUT
O
I
—I
Figure 5-1. Component Layout for 0.1% Oscillators
5-3/5-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

115
MODEL FREQ R111
R117
R113
R118
f2114
R129
1.50K
C103
C105
C104
C106
C107
C108 RI343 *.101
2102
453-.1 50 141 14. 80Lk 21...F .0824.4F .3314F 11.54 141
463-3 GO 9.76k 4.31K. .2....c .062,,F .53,,g 8.064 14I
443-.1 400
_13..4-K
14.3K 1,154 4.754 .33a .0120.047a$ 5.064 741
483-3 800 154 1.51K, 5,11K .15µFF .004184 .022&J 11.5K 741
41103-.1
....
1200 156K. 536K 4.15K •(4.4.F ,004...1 .015.F 8.06K 741
4323-3 3200 4.044 3,01K. 7.00K ,1.44C .00)9..F .004145 11.5 K LM501
4803-.1 4800 4.0114. 2.00K 1.33K. .1 u.F 003964F
.00414 8•04K 14.4301
41001-.I 10 KRE13.1K 11.5K T GOK 0062.F 330Fr .001/...F11.5K UA301
43813 380 II K 5.432K 7.87K .33.J .0124
1
-IS
R118
I K
2106
1../A 311
ca103
4IL 143821
4
COM
3
2
4P122 _C104
ei;›
R124
-Ci03
R1/5
F5v .
rOlt
..3.
Cs09
1600
tOK
1%
2
3
1101
P>.
R117
Cul
$121113
P130
500
FREO
A04
415
duo
1501,1
R131
10K
I%
1
2
7
1211C,
2.2K
8117 T 3"
ExTERNAL 5,414C
OPTIONL
-0 0
JI CONN
400
1Q
0 [1411.111404
WWI WW1 ON
ilauag
OILY
12u4
10K
OUTPUT LIMIT ADJ.
r
7
1105
4
741
3
2
$42
coo 41:0
O
40150vi
8101 0101 )cr---+15
---
100 tI
2W 1N4356 ' ' i R105 1RI07 r• 4-
0101 C101
i113K 3.3K .--
Rim ,
'21K 100
'25V
CR101
04457 Cu 0104
*I (2)
1443344
12103
2.2K
R109
100
2W
R104
toK
R110
470
XCRi02
A42500.11
RIO(. ii R1oS
3.3K 5 2.2K.
Rill
6.8K
0107 0108
(2)
1144149
C1101A
2443565
0105
RI13
10K
Ritl
10K.
C102
100
25V
COM
r1
R132
vv.
10K IX
CI07 11133
10K
RI34
1K
,1%
R135
vs",
10K
IX
7
1103
741 .
1
rA
ISC(C17 I
I4.01:ts:s*Z r I
Iaj
74
I: 1%'"1
I
7
L_
USED ON '20 L 30 MOOEL5 R1i5
475
1%
w.
RI39
R157 10K
tOK 1%
IX 2
mA.
8134. R135 a
ioi
I a>IA-1-T-7-
pciae
1104
741
40250VI 1 -15
-
#45TAttEl)
-1 J ON 50461E
6-0A0
use() 044 30 MODELS JL
Et> Er> a> 1;> Oc>
-4
41)60
14075p uNLE55 OTHERwt5E 5PiFif
t. ALL RE5151-0R.5 ARE 5% EARB014
2. ALL RE5ISTA14CE VALUCS adrEt1JOmm$01.1
3. ALL. CAPACITANCE VALUeS ARE INA...P.
er1315 15 4.15 K. ON ALL '20 MODELS.
t0. 0E307E5 P2 CONNECTIONS.
IlDr-4.45151A144( PRO(.7414740.414* u44115, .14.41774.41
rAtitil.;.4b,m4 400 E141 .
''' *"" 11,30 OSC.
Figure 5-2. Schematic for 0.11 Oscillators
5-5/S-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com