INSTRUCTION MANUAL
MODEL 560H
AMPLIFIER
The information in this manual is proprietary and may not be reproduced without written
permission from this company.
LIFE-SUPPORT POLICY: Ectron products are not authorized for use in life-support devices or
systems without the express, written approval of the President of Ectron Corporation.
Copyright 2018 Ectron Corporation
Ectron Corporation 8159 Engineer Road
All Rights Reserved San Diego, CA 92111-1907
858-278-0600
800-732-8159
Fax: 858-278-0372
E-mail: sales@ectron.com
Web site: www.ectron.com
WARRANTY
GENERAL
All Ectron instruments are warranted against defects in material and workmanship for one year from the
date of shipment to the original purchaser. Ectron agrees to repair or replace any assembly or components
(except expendable items such as fuses, lamps, batteries, etc.) found to be defective during this period.
Ectron’s obligation under this warranty is limited solely to repairing or replacing, at its option, an
instrument that in Ectron’s sole opinion proves to be defective within the scope of the warranty when
returned to the factory or to an authorized service center. Transportation to the factory or service center is
to be prepaid by the purchaser. Shipment should not be made without the prior authorization of Ectron.
This warranty does not apply to products repaired or altered by persons not authorized by Ectron, or not
in accordance with instructions furnished by Ectron. If the instrument is defective as a result of misuse,
improper repair, alteration, neglect, or abnormal conditions of operation repairs will be billed at Ectron’s
normal rates. Ectron assumes no liability for secondary charges of consequential damages as a result of an
alleged breach of this warranty; and in any event, Ectron’s liability for breach of warranty under any
contract or otherwise shall not exceed the purchase price of the specific instrument shipped and against
which a claim is made. This warranty is in lieu of all other warranties, expressed or implied; and no
representative or person is authorized to represent or assume for Ectron any liability in connections with
the sale of our products other than is set forth herein.
PROCEDURE FOR SERVICE
If a fault develops, notify Ectron or its local representative, giving full details of the difficulty. Include the
model and serial numbers. On receipt of this information, a service date or shipping instructions will be
furnished. If shipment is indicated, forward the instrument, freight prepaid, to the factory or to the
authorized service center indicated in the instructions.
DAMAGE IN TRANSIT
Instruments should be tested upon receipt. If there is any damage, a claim should be filed with the carrier.
A full report of the damage should be obtained by the claim agent, and that report should be forwarded to
Ectron. Ectron will advise the disposition to be made of the equipment and arrange for repair or
replacement. Please include model and serial numbers in all correspondence.
Ectron Corporation
8159 Engineer Road
San Diego, CA 92111-1907
Sales Department
800-732-8159, ext. 675
sales@ectron.com
TABLE OF CONTENTS
Section I, Description
General 1-1
Model 560H Features 1-1
Available Amplifier Options 1-1
Summary of Controls, Terminals, and
Indicators 1-1
Front Panel 1-1
Internal 1-1
Enclosures 1-1
E513-2A 1-1
E513-6A 1-2
R513-16 1-2
Available Accessories 1-2
Tables
1-1, Summary of Enclosures 1-2
1-2, Enclosure Connector Pin Designations 1-3
Section II, Specifications
Input Characteristics 2-1
Configuration 2-1
Impedance 2-1
Source Current, Stability 2-1
Source Current, Temperature 2-1
Maximum Overload 2-1
Guard Impedance 2-1
Common-mode Voltage 2-1
Zero 2-1
Stability 2-1
Temperature Coefficient 2-1
RTO Range 2-1
RTI Range 2-1
Common-mode Rejection 2-1
Dc to 60 Hz with 350 Unbalance 2-1
Dynamic Response 2-1
Bandwidth (within 3 dB) 2-1
Slew Rate 2-1
Settling Time 2-1
Overload Recovery 2-1
Filtered output 2-1
Noise 2-1
RMS 2-1
Peak 2-2
Gain (Vernier Out) 2-2
Steps 2-2
Vernier 2-2
Accuracy 2-2
Stability 2-2
Input Divider 2-2
Linearity 2-2
Output 2-2
Voltage 2-2
Short-circuit Protection 2-2
Impedance 2-2
Capacitive Loading (No Instability) 2-2
Current, dc or ac rms 2-2
Power, Dimensions, and Environment 2-2
Amplifier 2-2
Options 2-2
Operating Environment 2-2
Storage Temperature 2-2
Dimensions 2-2
Section III, Unpacking and Inspection
General 3-1
Section IV, Initial Checkout
General 4-1
Input Connections 4-1
Output Connections 4-1
Test Equipment Required 4-2
Function Generator 4-2
Precision Voltage Divider 4-2
Differential Oscilloscope 4-2
Resistors 4-2
Procedure 4-2
Gain 4-2
Frequency Response 4-3
Filtered Output (Options L, M, and N) 4-3
Figure
4-1, Initial Amplifier Test Setup 4-2
Table
4-1, Card-edge Connector J1 Pin
Assignments 4-1
Section V, Applications
Safety 5-1
Model 560H Operating Controls 5-1
Gain Controls 5-1
Zero Controls 5-1
i
Table of Contents Model 560H
Zero Indicators, Output Monitor Jacks 5-1
Signal Wiring 5-1
Common-mode Effects 5-2
Common-mode Voltage 5-2
Enclosures 5-2
Model R513-16 5-2
Model E513-6A Enclosure 5-2
Model E513-2A Enclosure 5-3
Model 516 Series Enclosure 5-3
Other Application Notes 5-3
Loads 5-3
Output Grounding Problems 5-3
Figure
5-1, Jumper Removal for a Model 560H in an
E516 Series Enclosure 5-3
Section VI, Theory of Operation
General Circuit Description 6-1
Gain Resistors 6-1
Detailed Circuit Description 6-1
Amplifier 6-1
Filter Amplifier 6-2
High-current Amplifier 6-2
Zero Detector 6-3
R513-16 Enclosure 6-3
E513-6A Enclosure 6-3
E513-2A Enclosure 6-3
Figure
6-1, Model 560H Simplified Amplifier
Schematic 6-2
Table
6-1, Gain combinations to provide the
indicated gain step 6-1
Section VII, Calibration and Maintenance
General 7-1
Test Equipment Required 7-1
Power Supply 7-1
Precision Voltage Divider 7-1
Differential Oscilloscope 7-1
Switches 7-1
Resistors 7-1
Null Detector 7-1
Function Generator 7-1
Rms Meter 7-1
Mating Connector 7-1
DMM 7-1
Preliminary Adjustments 7-1
Zero Adjustments (Figure 7-1) 7-1
RTO 7-1
RTO (Options K, L, M, and N) 7-1
RTI 7-2
Zero Detector 7-2
Source-current Adjustments 7-2
Common-mode-rejection Adjustment 7-2
Gain Calibration 7-3
Test Procedures 7-3
Gain Accuracy 7-3
Linearity 7-4
Input Impedance 7-4
Output Impedance 7-4
Frequency Response 7-4
Noise 7-5
Bench Testing 7-5
Figures
7-1, Basic Test Setup 7-2
7-2, Test Setup for Frequency Response 7-3
7-3, Test Setup for Noise and Common-mode
Rejection 7-4
Section VIII, Parts List
Abbreviations 8-1
Model 560H Amplifier 8-2
Model 560H Filter Assembly 8-3
Model 560H High-current Assembly 8-3
Model E513-2A Enclosure 8-4
Model E513-6A 8-4
Model R513-16 Enclosure 8-5
Accessories For All Enclosures 8-5
Schematics
Model E513-2A Power Supply 513-603
Model E513-2A Enclosure 513-604
Model E513-6A Enclosure 513-613
Model R513-16 Enclosure 513-622
Model 560H Filter Assembly 550-602
Model 560H Amplifier 560-602
Model 560H High-current Output
Assembly 563-603
ii
SECTION I
1DESCRIPTION
GENERAL
The Model 560H amplifier is a wideband, true
differential dc instrumentation amplifier. It offers a
high level of performance at a moderate cost for a
wide variety of applications. The compact design
features outstanding linearity, gain stability, and
input impedance. Excellent overall accuracy is
assured due to direct coupling and very high loop
gains. The internal circuitry uses discrete components and integrated circuits to provide “state of
the art” performance while keeping the cost and
complexity to a minimum. The low power consumption reduces warm-up time and component
aging due to internally-generated temperature rise.
All components are mounted on a single circuit
card. Certain options are included on smaller
circuit cards, which are plugged into the amplifier
circuit card. The output of the basic amplifier is
±10 V at 10 mA. Filtered outputs and high-current
capability are available options.
MODEL 560H FEATURES
A switch-selectable 100:1 input divider.
A switchable RTO-zero range control with
ranges of 0.1 V, 1 V, and 10 V.
Front-panel output-monitor jacks.
Optional filtered output of 10 Hz, 100 Hz,
1 kHz, 10 kHz, and wideband front-panel
switch-selectable positions.
Optional 100 mA peak (50 mA rms or dc)
output on either wideband or filtered output.
AVAILABLE AMPLIFIER OPTIONS
Option J
Wideband output of ±10 V at 10 mA.
Option K
Wideband output of ±10 V at 100 mA rms or
dc output. (See Footnote 1 on Page 2-2.)
Option L
Wideband output of ±10 V at 10 mA and a
selectable filtered output of ±10 V at 10 mA.
Option M
Wideband output of ±10 V at 100 mA rms or
dc and a selectable filtered output of ±10 V at
10 mA. (See Footnote 1 on Page 2-2.)
Option N
Wideband output of ±10 V at 10 mA and a
selectable, filtered output of ±10 V at 100 mA
rms or dc. (See Footnote 1 on Page 2-2.)
SUMMARY OF CONTROLS, TERMINALS,
AND INDICATORS
FRONT PANEL
Output monitor jacks (blue and black).
Output polarity-indicating LED’s.
Rotary gain switch.
Vernier gain-control potentiometer.
Vernier gain in-out toggle switch.
Rotary output filter switch (Options L, M, and
N only).
RTI-zero potentiometer.
INTERNAL
Three-position RTO-zero range slide switch.
100:1 input-divider slide switch.
Sensitivity-control potentiometer for the
amplifier output-polarity indicator LED’s
(zero detector).
ENCLOSURES
Enclosures are supplied with a three-wire power
cord and mating connectors for the amplifier inputs
and outputs unless stated otherwise.
E513-2A
This enclosure with integral power supplies
will accept up to two Model 560H units and is
intended for bench or portable use. All connections except input power are made to barrier
strips on the rear of the enclosure. A rear-panel
switch is used to inhibit the operation of the
zero-detector LED’s in all amplifiers. The
1-1
Description Model 560H
enclosure is 89 mm (3.5) high, 216 mm (8.5)
wide, and 229 mm (9) deep.
E513-6A
This enclosure with integral power supplies is
also intended for bench or portable use. It will
accept up to six Model 560H units. A frontpanel switch is used to inhibit the operation of
the zero-detector LED’s in all amplifiers. The
supplied input mating connectors are
PT06A-10-6P(SR) (Ectron P/N 1-310506-0),
and the amplifier wideband- and filter-output
(Options L, M, and N) connectors are isolated
BNC (mates not normally supplied). The
enclosure is 152 mm (6) high, 229 mm (9)
wide, and 305 mm (12) deep.
R513-16
This standard 483 mm (19) rack-mount enclosure with integral power supplies will accept
up to sixteen Model 560H units.
The enclosure includes a front-panel switch to
inhibit the operation of the ZERO DETECTOR LED’s in all amplifiers.
Three null indicators are used for remote
operation to provide isolation and interface
flexibility. The couplers are bypassed for local
operation using the front-panel mode switch.
Two isolated power supplies are used in each
enclosure. One provides the ±16 V necessary
for amplifier operation, and the other provides
15.9 V for the excitation supplies and 25 V
for remote operation (not used with the Model
560H).
The supplied input mating connectors are
PT06A-10P-6P(SR) (Ectron P/N 1-310506-0),
the outputs are BNC (mates not normally
supplied), and the remote control connector is
PT06A-128P(SR) (Ectron P/N 1-310408-0).
The enclosure is 133 mm (5.25) high,
483 mm (19) wide, and 457 mm (18) deep.
AVAILABLE ACCESSORIES
ECTRON PART NUMBER
Extender Board: 560-501-01
Enclosure Filler Panels
One-channel: 516-503-40
Four-channel: 516-503-55
Table 1-1: Summary of Enclosures
E513-2A E513-6A R513-16
Channels 2 6 16
Height
Width
Depth
Line Voltage 120/240 V ac 120/240 V ac 120/240 V ac
Ampl P/S ±16 V dc ±16 V dc ±16 V dc
Excit P/S +15.9 V dc +15.9 V dc +15.9 V dc
Input Mates Barrier Strip PT06A-10-6P(SR)
Output Mates Barrier Strip BNC (Not supplied) BNC (Not supplied)
Remote Mate PT06A-12-8P(SR)
Dc-power Mate PT06A-12-3S(SR)
89 mm (3.5) 152 mm (6) 133 mm (5.25)
216 mm (8.5) 229 mm (9) 483 mm (19)
229 mm (9.0) 305 mm (12) 457 mm (18)
PT06A-10-6P(SR)
(1-310506-0)
(1-310506-0)
(1-310408-0)
(1-310103-1)
1-2
Model 560H Description
Table 1-2: Enclosure Connector Pin Designations
E513-2A E513-6A R513-16
Noninverting Input 2 B B
Inverting Input 3 C C
Shield 5 E E
Bridge Completion 6 F F
+ Excitation
Excitation
Filtered Output High 8 * *
Filtered Output Low 7 * *
Wideband Output High 10 * *
Wideband Output Low 9 * *
* Models E513-6A and R513-16 enclosures use BNC output connectors.
1 A A
4 D D
1-3
Description Model 560H
1-4
SECTION II
2SPECIFICATIONS
Unless otherwise noted, all specifications apply at
25°C after thirty minutes warm-up with 0 to
1 k source resistance in any unbalance. RTI is
referred-to-input. RTO is referred-to-output. The
specifications are the maximum from nominal
allowed unless stated otherwise.
INPUT CHARACTERISTICS
CONFIGURATION
Differential, direct coupled. May be used inverting, noninverting, or single-ended. An
input ground return is not required except for
noise pickup problems.
IMPEDANCE
50 M nominal (1 M with 100:1 divider
switched in) in parallel with 300 pF.
SOURCE CURRENT, STABILITY
±2 nA for 200 hours.
SOURCE CURRENT, TEMPERATURE
±0.5 nA/°C.
RTO RANGE
Three switch-selectable ranges of ±0.1 V,
±1 V, and ±10 V.
RTI RANGE
±350 µV nominal.
COMMON-MODE REJECTION
DC TO 60 HZ WITH 350 UNBALANCE
>50 dB gain in dB.
DYNAMIC RESPONSE
BANDWIDTH (WITHIN 3 dB)
Small Signal (1 V rms): dc to 200 kHz.
Full signal (20 V p-p): gain of 1, dc to 20 kHz;
gain of 2, dc to 50 kHz; gains of 5 to 1000, dc
to 100 kHz.
SLEW RATE
Gain of 1, 1.2 V/µs; gain of 2, 2.4 V/µs; gains
of 5 to 1000, 6.3 V/µs.
MAXIMUM OVERLOAD
±20 V dc or peak ac common or normal mode
(±300 V dc or peak ac when 100:1 input
divider is in).
GUARD IMPEDANCE
10 M to output common nominal.
COMMON-MODE VOLTAGE
±10 V dc or peak ac operating (±300 V dc or
peak ac when 100:1 input divider is in).
ZERO
STABILITY
±4 µV RTI and ±0.35 mV RTO for 200 hours.
TEMPERATURE COEFFICIENT
±1 µV/°C RTI and ±0.35 mV/°C RTO.
SETTLING TIME
10 µs to within ±0.1% of final value.
OVERLOAD RECOVERY
50 µs to within ±0.1% of final value from a
500% overload.
FILTERED OUTPUT
3 dB ±1 dB at settings of 10 Hz, 100 Hz,
1 kHz, 10 kHz, and wideband position.
NOISE
RMS
From 0.1 Hz to 200 kHz: 4 µV RTI 0.5 mV
RTO.
From 0.1 Hz to 1 MHz RMS: 4 µV RTI
1.0 mV RTO.
2-1
Specifications Model 560H
PEAK
From 0.1 Hz to 10 Hz: 0.75 µV RTI 50 µV
RTO.
GAIN (VERNIER OUT)
STEPS
1, 2, 5, 10, 20, 50, 100, 200, 500, and 1000.
(0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, and 10
with 100:1 input divider switched in.)
VERNIER
1 to >2.5 times the step gain.
ACCURACY
Better than ±0.1%.
STABILITY
Time
±0.01%, 90 days.
Temperature
±0.005%/°C.
INPUT DIVIDER
100:1. (Adds 0.1% error to overall gain
accuracy.)
IMPEDANCE
0.1 .
CAPACITIVE LOADING (NO INSTABILITY)
Wideband output, up to 0.01 µF; filtered
output, up to 0.1 µF.
CURRENT, DC OR AC RMS
Current
Option Wideband Filtered
J 10 mA None
K 100 mA
1
None
L 10 mA 10 mA
M 100 mA
N 10 mA 100 mA
1
10 mA
1
POWER, DIMENSIONS, AND
ENVIRONMENT
AMPLIFIER
±16 V to ±18 V, 18 mA output load.
OPTIONS
K Adds 16 mA load.
L Adds 5 mA load.
M Adds 21 mA load.
N Adds 21 mA load.
LINEARITY
Within ±0.005% of the best straight line
through zero.
OUTPUT
VOLTAGE
±10 V dc or peak ac.
SHORT-CIRCUIT PROTECTION
No damage with sustained short circuit on
either or both outputs.
OPERATING ENVIRONMENT
0°C to 50°C, 90% RH.
STORAGE TEMPERATURE
25°C to 71°C.
DIMENSIONS
133 mm (5.25) high, 23 mm (0.9) wide, and
203 mm (8) long.
1
100 mA rms or dc except when limited by the enclosure
power supply. With all amplifiers equally loaded in an R51316 enclosure, each amplifier can supply 80 mA; in an E5136A, 100 mA; and in the E513-2A, 70 mA.
2-2
SECTION III
3UNPACKING AND INSPECTION
GENERAL
This instrument was thoroughly tested and inspected prior to shipment, and unless damaged in transit, it
should be ready for use when received.
The shipping carton should be examined for signs of damage before unpacking. If external damage is
present, notify the carrier before proceeding.
Remove the contents of the carton and carefully examine all units for any evidence of damage due to
excessive shock, vibration, water, etc. If there is evidence of physical damage, notify the carrier.
Account for all items on the packing list, including mating connectors and instruction manuals. If the
inventory of equipment does not correspond with the packing slip, notify Ectron Corporation.
If all is satisfactory, proceed with Section IV, INITIAL CHECKOUT.
3-1
Unpacking and Inspection Model 560H
3-2
SECTION IV
4INITIAL CHECKOUT
GENERAL
The simple tests described in this section are
generally sufficient to check the instrument on
receipt. The purpose of these tests is only to establish that the instrument is in operating condition.
This procedure is not a substitute for the specification tests in Section VII, which the user may want
to perform before placing the unit in service.
Table 4-1: Card-edge Connector J1 Pin
Assignments
1 Filtered output high
2 Zero-detect control
3
4 Wideband output high
5
KEY
6 Output and power low
7 Output and power low
8
9 Not used
10
11 Not used
12 Not used
SLOT To reduce capacitance between
13 Inverting input
14 Noninverting input
15 Shield
16 Not used
17 Not used
18 Not used
16 V Unregulated
+16 V Unregulated
16 V Regulated
+16 V Regulated
Pins 12 and 13.
CAUTION
Failure to remove Jumpers EE and FF will result in damage to the internal power supplies of
the 516 series enclosure.
Table 4-1 shows the card-edge connector J1 pin
assignments for the Model 560H if it is to be
bench-tested. The mating connector is a Cinch
50-18-A-20 (Ectron P/N 1-314018-0) with a polarizing key Cinch 50-PK-2 (Ectron P/N 1-319201-0)
installed between Pins 5 and 6.
CAUTION
Ensure that connections to the amplifier are
correct before applying power or signal voltages. Refer to Table 4-1 for correct pin assignments. Note that all pins are connected to their
complements by plated-through holes.
INPUT CONNECTIONS
The input is applied to J1, Pins 13 () and 14 ().
In most installations the input leads are guarded
electrostatically by an isolated and insulated shield
which is connected to guard J1, Pin 15.
CAUTION
Be sure that the signal source connected to the
amplifier input does not exceed 20 V dc or peak
ac with respect to output and power low, or
serious damage may occur.
OUTPUT CONNECTIONS
WARNING
When using an enclosure, make sure that its
chassis is connected to earth ground, preferably
through third-wire ground.
An Ectron Model 560H amplifier can be tested in a
513 Series or 516 Series enclosure or on the bench.
If an Ectron 516 Series enclosure is used, please
refer to Note 2 on Drawing 560-602 and Figure 5-1
concerning the removal of Jumpers EE and FF.
The wideband output is available on J1, Pins 4
(high) and 7 (common), and the filtered output on
J1, Pin 1 (high) and J1, Pin 6 (common). For these
tests either or both common pins should be
connected to the low side of all test equipment and
connected to power line ground. Tests on both
outputs can then be conducted by switching the
oscilloscope between J1, Pin 4 and Pin 1.
4-1
Initial Checkout Model 560H
Figure 4-1: Initial Amplifier Test Setup
TEST EQUIPMENT REQUIRED
FUNCTION GENERATOR
Wavetek Model 180 or equivalent.
PRECISION VOLTAGE DIVIDER
ESI RV622A or equivalent. The divider must
have an input resistance of 10 k or more.
DIFFERENTIAL OSCILLOSCOPE
Tektronix 5110 main frame, with 5B10N time
base and 5A21 differential amplifier or equivalent. Be sure the oscilloscope has been
adjusted for common-mode rejection according to the manufacturer’s instructions as differential measurements are used in the procedure
that follows.
RESISTORS (CARBON FILM OR COMPOSITION, ¼ W)
One 10 k, and one 100 .
PROCEDURE
GAIN (REFER TO FIGURE 4-1)
Although the Model 560H is designed as a
differential amplifier, it may also be operated in a
single-ended mode. Gain and frequency response
tests are made in the single-ended, noninverting
mode.
1. Connect the commons of the oscillator,
voltage divider, oscilloscope, and the
amplifier under test Pins 7 and 13 to a single
point. All measurements will be made in
reference to this point.
2. Connect the single point to power line
ground.
3. Connect the oscillator output to the input of
the voltage divider.
4. Connect the output of the divider to the
noninverting input J1, Pin 14. The other input
J1, Pin 13 is connected to the single-point
common.
5. Connect the amplifier wideband output J1,
Pin 4 to the oscilloscope input. The
oscilloscope must be direct coupled and
adjusted to zero. The wideband output can be
observed between the blue and black frontpanel jacks on the Model 560H.
6. Adjust the output of the oscillator to
minimum.
7. Apply power to the amplifier. The trace on
the oscilloscope should show that the output
of the amplifier is within a few millivolts of
zero.
8. Position the vernier switch to out.
9. Position the gain switch to 1000.
10. Adjust the output of the oscillator to 10 V p-p
at 100 Hz.
11. Adjust the voltage divider to the reciprocal
(0.001) of the gain setting. The oscilloscope
should show approximately 10 V p-p.
12. Switch in the 100:1 input divider S5.
13. Adjust the voltage divider to the reciprocal
(0.1, or 0.001 times 100) of the new gain
setting (10, or 1000 divided by 100). The
oscilloscope should again display
approximately 10 V p-p.
4-2
Model 560H Initial Checkout
14. Switch out the 100:1 input divider.
FREQUENCY RESPONSE (REFER TO FIGURE 7-2)
1. Fashion a voltage divider with a ratio of
approximately 100:1 using the 10 k and
100 carbon resistors. Do not use a
commercial decade voltage divider as most
have limited frequency response.
2. Change the gain of the amplifier under test to
100.
3. Adjust the function generator to a 1 V p-p
sine wave at 100 Hz.
4. Measure and record the output of the
amplifier (1 V p-p).
5. Change the function generator’s frequency to
200 kHz. Readjust the amplitude of the
generator to 1 V p-p if necessary.
6. Measure the output of the amplifier. It should
be 1 V p-p ±30%.
FILTERED OUTPUT (OPTIONS L, M, AND N)
The frequency response on each bandwidth
setting can be checked at the filtered output J1,
Pin 1. The response should be 3 dB ±1 dB at
the appropriate cut-off frequency decreasing
by 12 dB/octave at higher frequencies. (The
rolloff in the wideband position will be
3 dB/octave.)
4-3
Initial Checkout Model 560H
4-4
SECTION V
5APPLICATIONS
SAFETY
When using the Model 560H in an ac-powered
enclosure, ensure that the chassis is connected to
“earth” ground. This is normally accomplished
using the ac-line cord that accompanies the
enclosure.
MODEL 560H OPERATING CONTROLS
A number of controls are available on the front
panel of all Model 560H amplifiers. In addition,
two operating controls, RTO offset and the 100:1
divider, are located on the circuit card. The switchable filter control is available only on those amplifiers having Option L, M, or N.
GAIN CONTROLS
The step-gain control provides an accuracy of
±0.1% of the indicated step-gain position when the
VERNier IN/OUT switch is OUT. The VERNier
control increases the fixed gain step by more than
2.5 times, so the overall gain range without divider
is from 1 to more than 2500.
The 100:1 gain divider IN/OUT switch is located
at the connector end of the main circuit card of the
Model 560H. This control reduces the front-panel
gain settings by a factor of 100 thereby affording a
total gain range from 0.01 to more than 2500. With
the divider in use, input impedance drops from the
nominal 50 M to 1 M.
ZERO CONTROLS
The 560H has two controls that affect amplifier
zero: RTI zero and RTO zero with its associated
three-step range switch. (RTI stands for referredto-input and RTO stands for referred-to-output.)
The RTO-zero potentiometer, located on the front
panel, produces an offset at the output of the
amplifier that has a range determined by a threeposition switch located at the connector end of the
circuit card. The range switch is labeled with its
full-scale ranges of ±0.1 V, ±1 V, and ±10 V. That
is, the front-panel RTO-zero potentiometer can
offset the output by ±0.1 V, ±1 V, or ±10 V. Note
that the resolution of the RTO-zero control
diminishes as range increases.
The RTI-zero potentiometer, also located on the
front panel, affects the input zero of the amplifier
ahead of the gain-multiplying circuits. Thus the
effect at the output of the amplifier of the RTI-zero
control increases with increasing gain (whereas the
RTO-zero control setting is independent of gain).
For example, if the amplifier’s input is shorted and
the RTI-zero control is set such that there is an
input offset of 20 µV, assuming the RTO-zero
control is set for zero output at low gain; as gain
increases, output zero will become increasingly
further from zero by an amount equal to the gain
times the 20 µV offset. Although amplifier operation will be normal with the zero controls set off
zero, the proper method of setting zero controls is
to set RTO zero at low gain and RTI zero at high
gain. By repeating this procedure a few times the
output will remain at zero when gain is varied
throughout its total range.
ZERO INDICATORS, OUTPUT MONITOR JACKS
The amplifier’s output signal is available on the
front-panel monitor jacks labeled HI and LO.
These jacks can be connected to a meter to determine the output level or to set zeros. Also located
on the front panel are two LED indicators that
show the output condition of the amplifier. One
LED, labeled , is energized when the offset is
plus and the other LED, labeled , is energized for
minus. When both LED’s are extinguished, the
amplifier output is within approximately 2 mV of
zero. (The range is from 2 mV to 20 mV
depending on the setting of R84.) Noise will cause
both LED’s to turn on and if it is sufficient may
mask a null condition.
SIGNAL WIRING
Two-conductor, twisted-pair shielded cable is recommended for wiring to the inputs of the amplifier. A dc return path from input to output low is
not required unless it is needed for noise reduction.
5-1
Applications Model 560H
The wire should be copper to minimize thermal
effects, and the shielding should be 100% coverage
to minimize degradation in common-mode rejection. The shield should be continued as close as
possible to the connector termination. The input
signal leads should neither be routed near conductors which carry high ac currents nor be near
equipment producing magnetic fields.
Output wiring should be two-conductor twisted
pair with or without shield. If shielded, the shield
should be tied to output common at the amplifier,
not the load. The pin assignments for the card-edge
connector are listed in Table 4-1.
COMMON-MODE EFFECTS
The common-mode potential of an input signal is
that floating potential common to both input leads
with respect to output common. For example, if the
amplifier is measuring the voltage drop across a
shunt located in the 5 V lead of a power supply,
the common-mode voltage is the 5 V supply
voltage and the desired signal is the millivolt drop
across the shunt. (This assumes that the common
of the 5 V supply is tied to output common of the
amplifier.) The common-mode rejection of the
amplifier is the ability of the amplifier to reject the
5 V signal and amplify only the millivolt shunt
signal.
The Model 560H has the ability to reject commonmode signals by 50 dB plus gain in dB for voltages
from dc to 60 Hz having an amplitude up to
±10 V dc or peak ac and with an unbalanced resistance of up to 350 . In the power supply example,
operating with a gain of 100 (40 dB), the Model
560H would reduce the effects of the 5 V
common-mode signal by at least 90 dB or to an
equivalent 160 µV or less. Multiplied by the gain
of 100, this would produce an output offset of no
more than 16 mV. Note that this offset can be
canceled by zeroing the amplifier with no load on
the power supply.
The unbalanced-resistance part of the specification
would be the resistance of the shunt, or the difference in resistance present in the two inputs to the
amplifier. Unbalanced resistance is only significant
for ac common-mode signals.
In order to maximize common-mode rejection,
several precautions must be observed when wiring
the input to the amplifier. Shielding should be as
complete as possible; and, for ac-common-mode
signals, unbalanced resistance should be minimized. If the signal leads are coupled through
connectors, the shells of the connectors should be
connected to the common-mode signal the same as
the cable shield.
COMMON-MODE VOLTAGE
The maximum operating common-mode voltage
rating of this amplifier is ±10 V dc or peak ac. For
signals over a few tenths of a volt, the maximum
common-mode voltage must be reduced so that the
sum of common-mode and signal (normal-mode)
voltages does not exceed the 10 V rating. When the
100:1 divider is used, the common-mode voltage
rating of the amplifier is ±300 V dc or peak ac.
ENCLOSURES
WARNING
When using an enclosure, make sure that its
chassis is connected to earth ground, preferably
through third-wire ground.
Three enclosures are available for use with the
Model 560H amplifier. The Model R513-16
accepts 16 amplifiers and is designed to fit a
standard 19-inch EIA rack enclosure. The Model
E513-6A is a bench-mounting enclosure that
accepts up to six amplifiers. The Model E513-2A,
also a bench-mounting enclosure, holds two
amplifiers. Each of these enclosures includes an
integral ac power supply which provides all
necessary amplifier power.
MODEL R513-16 (DRAWING 513-622)
This sixteen-channel enclosure provides all necessary power for the amplifiers. It operates from
100 V ac to 240 V ac.
MODEL E513-6A ENCLOSURE (DRAWING
513-613)
This six-unit enclosure, designed for bench use,
includes two 115/230 V ac power supplies and
rear-panel connectors with mates for all inputs and
outputs. The power supplies generate the necessary
voltages for the amplifiers. The zero-detector
switch S2, located on the front panel, allows the
user to turn off the null-indicating LED’s on the
amplifiers. The output connectors P7-P18 contain
5-2
Model 560H Applications
Figure 5-1: Jumper Removal for a Model 560H in an E516 Series Enclosure
high and low outputs for both the wideband and
filtered outputs of the amplifiers. Note that only
amplifiers equipped with switchable filters
(Options L, M, and N) will have a second output.
MODEL E513-2A ENCLOSURE
Also designed for bench use, this enclosure accommodates two Model 560H amplifiers. On the rear
panel is a barrier strip for each channel for all input
and output connections along with the zerodetector switch which allows the user to turn off
the null-indicating LED’s on the amplifiers. The
internal power supply ±16 V for amplifier power.
MODEL 516 SERIES ENCLOSURE
The 560H amplifier can be used in a 516 Series
enclosure; but first, two jumpers identified as EE
and FF on the 560H must be removed. Figure 5-1
shows the reason. If the jumpers are not removed,
the plus and minus unregulated supplies will be
connected to the regulated supplies. The jumpers
are installed in the 560H when shipped.
Model 563H transducer conditioner-amplifiers can
be used in the 513 Series enclosures directly, and
the Models 560 and 561 can be used in them with
certain limitations. The specification for commonmode voltage will be degraded because the Model
513 enclosures supply ±16 V to the amplifiers,
whereas the Model 516 enclosures supply 20 V
and15 V. In addition, the Model 513 enclosures
do not contain the ±20 V unregulated supplies to
power the high-current options K, M, and N. This
can be overcome by jumpering Pin 10 to Pin 5 and
Pin 8 to Pin 3 on the required channels in the
enclosure. This will supply ±16 V to the high
current option.
OTHER APPLICATION NOTES
LOADS
Because of its low output impedance and the
available high-current output (Options K, M, and
N) the Model 560H can satisfy most load
requirements. R64, R65, and R66 (as shipped from
the factory, R64 is not used and R65 and R66 are
jumpered) are available for a variety of loadmatching needs. These could include matching the
characteristic impedance of an output cable, adding
an output divider, or adding a “T” network to
match for example the impedance of a light-beam
galvanometer.
OUTPUT GROUNDING PROBLEMS
Since all amplifiers in one enclosure operate from
the same power supply, the output common of one
amplifier will be connected to the commons of all
other amplifiers in that enclosure. For most
5-3
Applications Model 560H
applications this should cause no problems. For
example, when all outputs feed a single load such
as a recorder or a multiplexer, no grounding
problems should occur. If, however, the amplifiers
feed different loads and these loads have different
grounds, ground loops could occur. Fortunately,
signal levels at the output are usually high, and
small ground currents will not be significant. In
some cases, however, noise problems will occur. In
these cases, the user should try to lift the ground tie
point of some of the loads, if possible. Using heavy
drain wires to interconnect loads may be another
remedy. In any event, the output leads, both high
and low, should normally be wired separately from
amplifier to load.
5-4
SECTION VI
6THEORY OF OPERATION
GENERAL CIRCUIT DESCRIPTION
Figure 6-1 is a simplified schematic of the Model
560H derived from Drawing 560-602. The input
signals are applied to the bases of Q2, a dual NPN
transistor with small geometry and monolithic
construction to provide matched characteristics.
The outputs of Q2 drive the inverting inputs of
A1-a and A1-b. Gain switching is accomplished by
changing feedback resistors which allow gains of 1
to 1000.
The outputs of A1-a and A1-b drive the input of
high-level differential amplifier A2-a. Amplifier
A2-a is connected in a bridge configuration with a
differential voltage gain of 1. Any common-mode
voltage present is applied to the inputs of A2-a
where attenuation is achieved due to the balanced
bridge configuration. The single-ended output of
A2-a is connected to the minus input of A3-a. The
output of A3-a at Pin 1 is connected to the input of
A2-b, the RTO-zero amplifier. The output of A2-b
is connected to the amplifier wideband output Pin
4 and the inputs of the optional filter assembly and
100 mA output assemblies.
Table 6-1: Gain combinations to provide
the indicated gain step
GAIN STEP Q1, A1 A3-a/A2-b
1 1 1
2 1 2
5 1.6 3
10 3.3 3
20 6.6 3
50 16.6 3
100 33.3 3
200 66.6 3
500 166.6 3
1000 333.3 3
GAIN RESISTORS
In gain positions 1 and 2, there is no gain resistor
for Q2 and A1, so the gain of that portion is one.
The gain of the inverting amplifier A3-a is1 on a
gain position of 1 and2 on a gain position of 2.
On gains of 5 to 1000, the gain of A3-a remains
constant at3; and various feedback ratios are
achieved by switching resistors R21-R31.
DETAILED CIRCUIT DESCRIPTION
AMPLIFIER
Referring to Drawing 560-602 at the rear of the
manual, the input signals from J1, Pins 13 and 14
and the guard from J1, Pin 15 are connected to T1,
which is a transformer with tight coupling between
windings. This is a common-mode filter that
rejects high-frequency common-mode voltages.
R6, R7, and R8 minimize the pumpout current
from the bases of Q2.
R91 through R96 comprise the 100:1 input divider.
When S5 is switched to the IN position, the divider
is activated. The gain steps in this mode are 0.01
through 10 in the 1-2-5 step sequence. The input
impedance becomes 1 M, and the maximum
common-mode voltage goes to 300 V dc or peak
ac.
Q1 with its associated circuitry is a constantcurrent generator which biases the critical input
stages. Potentiometer R11 functions as an RTIzero control with a nominal range of ±350 µV.
CR3 and CR4 are low-leakage diodes which limit
reverse bias on the base-emitter junctions of Q2.
CR5 and CR8 are reverse biased in normal
operation and prevent common-mode latch-up
when power is applied. The noninverting inputs of
A1 are biased from Q1 through resistive divider
R17-R18. Amplifier A1-a with Q2-a and A1-b
with Q2-b form two separate feedback amplifiers
that are connected by the gain-determining resistors R21 through R31. R23 adjusts the overall gain
of the amplifier at gains of 5 through 1000. The
voltage at the junction of a divider across the
outputs (R32, R33) is fed back to the input
circuitry, including the input bias compensation
resistors R7 and R8. When driven in this manner,
resistors R7 and R8 do not present a commonmode leakage path at the input terminals. The
voltage at the junction in respect to common is a
6-1
Theory of Operation Model 560H
Figure 6-1: Model 560H Simplified Amplifier Schematic
function of any common-mode voltage which may
be present and is fed back to enhance the CMR of
the amplifier.
The outputs of A1 drive the inputs of the highlevel bridge differential amplifier A2-a. The bridge
resistors consist of R34 through R37, R39, R41,
and R97. Potentiometer R37 is used to balance the
bridge for optimum dc common-mode rejection.
The bridge resistors are scaled so that the amplifier
has a differential gain of1. The output of A2-a is
connected to the inverting input of A3-a. A3-a has
a gain of1 on gain step 1, a gain of2 on gain
step 2, and a gain of3 on steps 5 through 1000.
The output of A3-a is connected to the inverting
input of A2-b, the RTO-zero amplifier. The output
of that stage is fed to the amplifier wideband
output J1, Pin 4 by jumper Y-Z, and the filter and
100 mA output amplifiers if either or both of these
options are present.
CR12 and CR13 comprise a stable 6.9 V dc
power supply which is used to generate the voltage
for the three ranges of RTO zero. R105 and R106
provide the proper operating current for the two
precision zener diodes. Because the RTO
potentiometer R107 is connected directly across
the supplies, its wiper feeds a voltage of from6.9
to 6.9 to R104. In the 10 V range, R104 forms a
voltage divider with R101 to inject the proper
voltage into Pin 5 of A2-b. In the 1 V RTO range,
R103 is placed in parallel with R101 to alter the
divider appropriately. Similarly, in the 0.1 V RTO
range, R102 is placed in parallel with R101.
FILTER AMPLIFIER (DRAWING 550-602)
The input to the filter-amplifier assembly, which
plugs into J2 on the main board, is connected to the
wideband amplifier output J1, Pin 4. The filter
amplifier output appears on J1, Pin 1. Both outputs
are available simultaneously. Switch S1 connects
various resistor and capacitor combinations across
the inputs of A1 to select the cut-off frequencies.
Potentiometer R11 adjusts the dc offset of A1 to
match the wideband output.
HIGH-CURRENT AMPLIFIER (DRAWING
563-603)
The current amplifier has unity gain and consists of
an input buffer A1 and a high-current driver A2.
The components are mounted on a plug-in board
which is installed on J3 of the main amplifier
assembly. Transistors Q1 and Q2 provide current
limiting. The current limit (130 mA) is established
6-2
Model 560H Theory of Operation
by CR1, CR4, R5, and R9. The operating point of
A2 is set by R7.
ZERO DETECTOR
Two front-panel LED indicators DS1 and DS2
allow the user to adjust the output of the amplifier
to zero without external equipment when no input
is applied to the amplifier. One or the other LED
will be lighted if the output of the amplifier is not
zero. As zero volts output is approached, the LED
will dim. When zero is reached, it will extinguish.
As the amplifier output continues through zero to
the other polarity, the other LED will light.
The output of the amplifier J1, Pin 4 is applied to
A3-b, Pin 5 through RC filter C17 and R80. The
voltage at A3-b, Pin 7 is adjusted to zero using
R81 when no output signal is present at J1, Pin 4.
If J1, Pin 4 becomes positive, A3-b, Pin 7 will be
positive, and DS1 will be illuminated. Potentiometer R84 adjusts the sensitivity of the detector
from 2 mV to 20 mV. (With R84 in a fully
clockwise position, the sensitivity is 2 mV.)
R513-16 ENCLOSURE (DRAWING 513 - 622)
The NULL INDICATORS switch S1, when in the
OFF position, applies16 V to the gate of Q4 on
each amplifier (Drawing 560-602) and inhibits
indicators DS1 and DS2.
The enclosure power supplies provide ±15.9 V at
up to 1.5 A for amplifier power including 100 mA
Options K, M, and N.
E513 - 6A ENCLOSURE (DRAWING 513 - 613)
Front-panel controls are POWER S1 and ZERO
DETECTOR S2. Above the power switch is the
power indicator DS1. The ZERO DETECTOR
switch applies16 V to the individual conditioneramplifiers to disable their front-panel zero detector
indicators. Power supply PS1 is adjusted for ±16 V
with a current capability of 1.5 A. It may be wired
for 120 V ac or 240 V ac. See Table 1 and Flag
Note 8 on Drawing 513-613 for fuse ratings. (PS2
supplies power for the excitation supply and is not
used by the Model 560H.)
E513 - 2A ENCLOSURE (DRAWINGS 513 - 603
AND 513 - 604)
The front panel has a power switch S1 and
indicator DS1. The rear panel has two terminal
strips TS101 and TS102 for input and output
connections. The rear panel has an access hole to
the 120/240 V ac switch S2. Refer to Drawing
513-604, Flag Note 2, for the proper fuse rating.
Drawing 513-603 shows two power supplies.
Bridge rectifier CR2 supplies plus and minus
power for U2-a and U3. These integrated-circuit
regulators supply the ±16 V at up to 0.18 A for the
Model 560H amplifier. (Bridge rectifier CR5
supplies U1 to provide 15.9 V at up to 0.2 A for
the excitation supplies, not present in the Model
560H.)
6-3
Theory of Operation Model 560H
6-4
SECTION VII
7CALIBRATION AND MAINTENANCE
GENERAL
The calibration controls can be identified on the
circuit board by reference designation. Instructions
for their proper use and associated test procedures
are given in the following paragraphs. The Model
560H to be tested must be energized and allowed
to reach thermal stability. Ectron recommends a
warm-up period of 30 minutes.
TEST EQUIPMENT REQUIRED
POWER SUPPLY
Fluke Model 731B or equivalent 10 V dc
supply.
PRECISION VOLTAGE DIVIDER
ESI Model RV622A. The divider must have an
input impedance of 10 k.
DIFFERENTIAL OSCILLOSCOPE
Tektronix 5110 main frame, with 5B10N time
base and 5A21 differential amplifier or equivalent. Be sure the oscilloscope has been
adjusted for common-mode rejection according to the manufacturer’s instructions as
differential measurements are used in the
following procedure.
SWITCHES
Five Single-pole two-position
One Single-pole three-position
RESISTORS (CARBON FILM OR COMPOSITION, ¼ W)
One 100
Two 350
Three 1 k
One 100 k
NULL DETECTOR
Keithley Model 155 or equivalent.
FUNCTION GENERATOR
Wavetek Model 180 or equivalent.
RMS METER
HP Model 427A or equivalent.
MATING CONNECTOR
The mating connector for the amplifier cardedge J1 is a Cinch 50-18-A-20 (Ectron P/N
1-314018-0) which must be keyed between
Pins 5 and 6.
DMM
HP Model 3478A or equivalent.
PRELIMINARY ADJUSTMENTS
(FIGURE 7-1 )
1. Set all switches to 1.
2. Set the voltage source PS1 to 10.000 V dc
±0.1 V dc.
3. Adjust both inputs of the oscilloscope to
10 mV/cm dc.
4. Set S3 to 2.
5. Set S1 from 1 to 2 several times and adjust
the differential input balance on the
oscilloscope for minimum deflection.
6. Restore S1 and S3 to Position 1.
ZERO ADJUSTMENTS (FIGURE 7-1 )
All of the following adjustments are made with all
switches in Position 1 and Jumper J1 installed.
RTO means referred-to-output. RTI means
referred-to-input.
RTO
1. Set the amplifier gain to 5. Connect the
DMM to A2, Pin 1 and adjust R49 for 0 V
±1 mV.
2. Connect the DMM to A3, Pin 1 and adjust
R48 for 0 V ±1 mV.
3. Set S6 on the amplifier (RTO Range Switch)
to the 0.1 position.
4. Connect the DMM to A2, Pin 7 and adjust
R107 for 0 V ±1 mV.
RTO (OPTIONS K, L, M, AND N)
The offset on the filter assembly may be
adjusted to equal the offset at the wideband
7-1
Calibration and Maintenance Model 560H
Figure 7-1: Basic Test Setup
output if necessary by adjusting R11 on the
filter card.
There is no extra zero adjustment on the high
current assembly. The output can be adjusted
to zero by the RTO control on the previous
stage (R11 on Filter Card for Option N).
RTI
1. The amplifier RTI-zero control R11 is
accessible at the front panel. Set the amplifier
for a gain of 1000 to make this adjustment.
The amplifier inputs must be connected to
guard.
2. Adjust R11 for the same offset at the output
as at a gain of 5.
3. Recheck all RTO adjustments.
4. Remove jumper J1.
ZERO DETECTOR
1. Connect a jumper from the junction of R80
and C17 to the amplifier output low.
2. Adjust R81 for zero ±20 mV at A3, Pin 7
with respect to the amplifier output low.
3. Remove the jumper from R80 to the output
low.
4. The zero-detector sensitivity adjustment R84
can be adjusted at this time. The range of the
adjustment is 2 to 20 mV. (It is set at the
factory to 2 mV, full clockwise position.)
SOURCE-CURRENT ADJUSTMENTS
(FIGURE 7-1 )
1. Set all switches to 1.
2. Connect jumper J1.
3. Adjust the gain of the amplifier to 1000.
4. Connect a null detector to the amplifier
output.
5. Set S2 to 2. Record the offset voltage.
6. Set S2 to 1 and S5 to 2. Record the offset
voltage.
7. Algebraically add the recorded voltages, then
divide by 2. Adjust R6 to this value.
8. Repeat Steps 5 through 7 until the recorded
value is less than ±2 mV.
9. Remove jumper J1 and set all switches to
Position 1.
COMMON-MODE-REJECTION
ADJUSTMENT (FIGURE 7-3 )
1. Set S1 to Position 2.
2. Adjust the amplifier to a gain of 10.
3. Connect the amplifier as shown in
Figure 7-3.
4. Adjust the function generator for a 20 V p-p,
20 Hz square wave .
5. Adjust R37 for minimum deflection as seen
on the oscilloscope.
6. Reset RTO zero as necessary.
7-2
Model 560H Calibration and Maintenance
Figure 7-2: Test Setup for Frequency Response
GAIN CALIBRATION (FIGURE 7-1 )
1. Connect the amplifier as shown in
Figure 7-1, but without jumper J1.
2. Set all switches to 1.
3. Set the amplifier gain switch to 1000 and the
vernier switch out.
4. Center the trace on the oscilloscope using the
vertical position control.
5. Adjust the voltage divider R2 to .001000.
6. Set S1 to 2.
7. Adjust R23 until the oscilloscope trace is
centered.
8. Return all switches to Position 1.
TEST PROCEDURES
The following test procedure describes the methods currently used at Ectron to test Model 560H.
The procedure consists of comparing the amplifier
output with an input signal on an oscilloscope
using the differential (A-B) input. Using high
oscilloscope sensitivity, the deviation between
input and output can be easily measured. A
precision divider is used at the input so that the
amplifier output can be exactly equal to the signal
applied to the divider. The basic setup is shown in
Figure 7-1. In duplicating or simulating this
procedure, considerable attention should be given
to proper shielding. A millivolt nullmeter may be
used instead of the oscilloscope to make the differential measurements.
Differential measurement offers several advantages
over the usual procedures that incorporate digital
voltmeters or other input-output comparison methods. For instance, to measure linearity the differential measurement requires only that a signal voltage be varied from zero to full scale (usually by a
potentiometer) while the deviation on the oscilloscope is observed (0.005% measurements are
easily made with a simple filter). Other methods of
measuring linearity offer many difficulties, including accounting for the inaccuracies of the instrumentation.
1. Refer to TEST EQUIPMENT REQUIRED
on Page 7-1.
2. Perform the preliminary adjustments outlined
on Page 7-1.
3. Set all switches to Position 1 at the start of
each test unless otherwise specified.
4. Remove jumper J1 unless otherwise
specified.
GAIN ACCURACY (FIGURE 7-1)
1. Adjust the amplifier to the gain position to be
verified. Set the gain vernier switch to out.
2. Adjust the precision divider R2 to the
reciprocal of the gain in step 1.
3. Center the trace on the oscilloscope using the
vertical positioning control.
4. Set S1 to 2.
5. The gain error in percent is the deviation in
volts multiplied by 10.
7-3
Calibration and Maintenance Model 560H
max. dev.
20
1⋅107
Eo(in mV)
Eo(change in dc output)
0.01 A (output current)
Figure 7-3: Test Setup for Noise and Common-mode Rejection
LINEARITY (FIGURE 7-1)
1. If the filtered output is to be used for this test
then the filter switch should be set to the
W/B position to eliminate phase shift error in
the measurement.
2. Adjust the amplifier to a gain of 1.
3. Adjust the precision divider to the reciprocal
of the gain.
4. Substitute the function generator for the
power supply in Figure 7-1.
5. Adjust the function generator for a triangular
output of 20 V p-p at 1 Hz.
6. Connect a jumper from the B input to the H
input on the oscilloscope.
7. Set S1 and S3 to 2.
8. Note and record the maximum and minimum
deviation on the oscilloscope (best straight
line through zero).
Linearity (%FS) =
× 100.
9. The linearity test may be repeated for other
gains by repeating steps 3 through 8.
INPUT IMPEDANCE (FIGURE 7-1)
1. Adjust the amplifier to a gain of 10.
2. Adjust the precision divider R2 to .100000.
3. Connect the DMM to the amplifier output
pins. (Do not use the monitor jacks on the
front of the amplifier.)
4. Set S1 to 2.
5. Record the deviation (Eo) at the amplifier
output when S2 is switched from Position 1
to Position 2.
Zin =
.
OUTPUT IMPEDANCE (FIGURE 7-1)
1. Adjust the amplifier to a gain of 10.
2. Adjust the precision divider R2 to .100000.
3. Connect the DMM directly to the amplifier
output pins. (Do not use the monitor jacks on
the front of the amplifier.)
4. Set S1 to 2.
5. Record the deviation at the amplifier output
(Eo) when S4 is switched from Set 1 to 2.
Z
=
out
.
FREQUENCY RESPONSE (FIGURE 7-2)
1. Adjust the amplifier to a gain of 1000.
2. Adjust the function generator to a 2 V p-p
100 Hz sine wave as seen on the
oscilloscope.
7-4
Model 560H Calibration and Maintenance
3. Adjust the function generator to higher frequencies. The peak-to-peak amplitude should
remain within ±30% of nominal over the
specified bandwidth of the amplifier.
NOISE (FIGURE 7-3)
NOTE: Use caution when wiring the input circuit
for this test to avoid introducing additional noise.
1. Substitute an rms meter with an RC filter of
the appropriate cut-off frequency connected
in series for the oscilloscope.
2. Remove the oscillator from the test fixture in
Figure 7-3.
3. Set S1 to 2.
4. Connect the jumper as shown in the figure.
5. Adjust the amplifier to a gain of 1.
6. Record the rms RTO noise.
7. Adjust the amplifier to a gain of 1000.
8. Record the rms RTI noise.
BENCH TESTING
The Model 560H operates from an isolated power
supply that provides ±16 V regulated for the
amplifier.
However, all amplifiers can be tested using an
extender board as listed in Section VIII, or they
can be bench tested using a ±16 V supply. A ±15 V
supply can be used but the maximum CMV is
reduced to ±7.5 V and the output amplitude and
drive capability will be degraded somewhat.
7-5
Calibration and Maintenance Model 560H
7-6
SECTION VIII
8PARTS LIST
ABBREVIATIONS
The following are the abbreviations used for manufacturers:
AB ALLEN BRADLEY
AD ANALOG DEVICE
AL ALCO
AM AMPHENOL
AR ARCO
BE VOLEX-BELDEN
BN BENDIX
BO BOURNS
CA CAPAR
CE CENTRALAB
CI TRW CINCH
CK C&K
CO CORNING
CS CHICAGO SWITCH
DL DALE
EC ECTRON CORPORATION
EL ELCO
ER ERIE
EV ELECTROVERT
FA FAIRCHILD
GE GENERAL ELECTRIC
GI GENERAL INSTRUMENTS
GR GRAYHILL
GS GENERAL SEMICONDUCTOR
HP HEWLETT PACKARD
IM IMB
IP INTERPOWER
KE KEMET
KO KOA SPEER
LF LITTLEFUSE
LT LINEAR TECHNOLOGY
ME MEPCO-ELECTRA
MN MONSANTO
MO MOTOROLA
MU MURA
MX MOLEX
NA NAT’L SEMICONDUCTOR
NY NYTRONICS
PA PANASONIC
PO POWER ONE
RO ROGAN
SL SIGNAL
SE SIEMENS
SG SIGNETICS
SI SILICONIX
SP SPRAGUE
ST STANCOR
SW SWITCHCRAFT
TI TEXAS INSTRUMENTS
8-1
Parts List Model 560H
MODEL 560H AMPLIFIER
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
A1 Op amp, dual AD OP270GP 1-100270-1
A2, 3 Op amp NA LF412CN 1-100412-0
C1 Cap, 0.01 µF ceramic disc SP TGS10 1-421004-0
C3, 4, 10 Cap, 10 pF silver mica AR DM5CC100J03 1-400103-0
C5, 8 Cap, 6.8 µF 35 V tantalum KE CSR13F685KL 1-446800-0
C9 Cap, 4.7 µF 35 V tantalum SP 196D475X0035JA1 1-444700-1
C11, 13 Cap, 0.02 µF ceramic disc SP TGS-20 1-422004-1
C15 Cap, 27 pF 300 V AR DM5FY270J 1-400273-0
C17 Cap, 0.1 µF metal mylar ME 712A1BC104PK101LA 1-431009-1
C19 Cap, 0.1 µF DISC 25 V SP HY550 1-431004-0
CR1, 2, 6, 7, 11 Diode, signal FA 1N4148 1-194148-0
CR3-5, 8 Diode, signal MO 1N457 1-190457-0
CR12, 13 IC, ref NA LM329D 1-130329-1
DS1, 2 LED, yellow HP HLMP1719 4-120028-0
J2, J3 Connector, 9-pin EL 00-8129-009-603-002 1-314009-0
L1, 2 Inductor, 10UH DL IR2-10UH 1-308020-0
Q1 Transistor, PNP FA PN4248-18 1-214248-0
Q2 Transistor, Dual NPN selected EC 031-006-01 031-006-01
Q4 FET SI J113 1-240113-0
R1
R2-4
R5
R6, 49, 107
R7, 8
R9, 14 Res set, matched metal film EC 550-003-01 550-003-01
R10, 12, 83
R11, 37
R15, 16, 53, 105, 106
R17
R18
R19
R21, 22, 24-31, 42, 45, 51,
99, 100
R23
R32, 33
R34-36, 41
R38
R39
R40, 89
R48
R50
R52, 81
R54, 58
R56
R80
R85
R86
R87
R91-96 Res set, matched metal film EC 563-001-01 563-001-01
R97
R98
Res, 22 k carbon film
Res, 2.2 k carbon film
Res, 1.40 k metal film 50 ppm tc
Potentiometer, 20 k
Res, 22 M carbon composition
Res, 10 k carbon film
Potentiometer, 500
Res, 4.7 k carbon FIL
Res, 17.4 k metal film 50 ppm tc
Res, 124 k metal film 50 ppm tc
Res, 732 metal film 50 ppm tc
Res set, matched metal film EC 563-002-01 563-002-01
Potentiometer, 2 k
Res, 6.8 k carbon film
Res, 16.9 k metal film 25 ppm tc
Res, 68 k carbon film
Res, 680 k carbon film
Res, 22 carbon film
Potentiometer, 100 k
Res, 24.9 k metal film 25 ppm tc
Potentiometer, 50 k
Res, 470 carbon film
Res, 10 M carbon film
Res, 2.7 M carbon film
Res, 120 carbon film
Res, 3.9 k carbon film
Res, 1 M carbon film
Res, 75 carbon film
Res, 33 k carbon film
KO
KO
CO RN55C1141F 6-101140-0
BO 3009Y-1-203 6-452200-2
KO
KO
BO 3006P-1-500 6-450500-0
KO
CO RN55C1742F 6-102174-0
CO RN55C1243F 6-103124-0
CO RN55C7320F 6-100732-0
BO 3006P-1-202 6-451200-2
KO
CO RN55E1692F 6-121169-0
KO
KO
KO
BO 3006P-1-104 6-453100-0
CO RN55E2492F 6-122249-0
BO 3006P-1-503 6-452500-0
KO
KO
KO
KO
KO
KO
KO
KO
CF ¼ 22 k
CF ¼ 2.2 k
CF ¼ 22 M
CF ¼ 10 k
CF ¼ 4.7 k
CF ¼ 6.8 k
CF ¼ 68 k
CF ¼ 680 k
CF ¼ 22
CF ¼ 470
CF ¼ 10 M
CF ¼ 2.7 M
CF ¼ 120
CF ¼ 3.9 k
CF ¼ 1 M
CF ¼ 75
CF ¼ 33 k
6-172220-0
6-171220-0
6-175220-0
6-172100-0
6-171470-0
6-171680-0
6-172680-0
6-173680-0
6-170022-0
6-170470-0
6-175100-0
6-174270-0
6-170120-0
6-171390-0
6-174100-0
6-170075-0
6-162330-0
8-2
Model 560H Parts List
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
R101
R102
R103
R104
S1 Switch, SPDT CK 7101MD9AVZBE 7-110000-1
S2 Switch, 2P10POS GR 71AY231545 7-100019-1
S5 Switch, slide DPDT AL AS2DG-PC 7-130003-0
S6 Switch, slide SPDT AL AS1EG-PC 7-130002-0
T1 Transformer, trifilar BO 4259-0003 8-220000-0
Res, 113 k metal film 25 ppm tc
Res, 274 metal film 50 ppm tc
Res, 3.01 k metal film 50 ppm tc
Res, 33.2 k metal film 25 ppm tc
Assembly, filter EC 550-501-01 550-501-01
Assembly, high current EC 550-519-01 550-519-01
MODEL 560H FILTER ASSEMBLY (OPTIONS L, M, AND N)
ASSY 550-501-01 (DWG 550-602)
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
A1 Op amp NA LF356N 1-100356-1
C1 Cap, 0.15 µF metal mylar IM XA2B154J 1-431501-0
C2 Cap, 0.0015 µF metal mylar IM XA2B152J 1-411501-0
C3, 4 Cap, 0.12 µF metal mylar IM XA2B124J 1-431201-0
C5 Cap, 0.0012 µF metal mylar IM XA2B122J 1-411201-0
C6, 7 Cap, 0.1 µF ceramic disc ER RPE121Z5U104M100V 1-431009-0
J2 Connector, 9-pin EL 00-8129-009-603-002 1-314009-0
R1, 3, 5, 7
R2, 4, 6, 8
R9
R11
S1 Switch, rotary 2P5POS GR 71AY231546-2-5S 7-100015-1
Res, 93.1 k metal film 50 ppm tc
Res, 9.31 k metal film 50 ppm tc
Res, 470 carbon film
Potentiometer, 10 k
CO RN55E1133F 6-123113-0
KO RN55C2740F 6-100274-0
CO RN55C3011F 6-101301-0
CO RN55E3322F 6-122332-0
CO RN55C9312F 6-102931-0
CO RN55C9311F 6-101931-0
KO
BO 3006P-1-103 6-452100-0
CF ¼W 470
6-170680-0
MODEL 560H HIGH-CURRENT ASSEMBLY (OPTIONS K, M, AND N)
ASSY 550-519-01 (DWG 563-603)
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
A1 Op amp NA LF411CN 1-100411-1
A2 Op amp, power LT LT1010CT 1-101010-0
C1, 2 Cap, 0.1 µF ceramic disc CE CZ201A1D4M 1-431009-0
C3, 5 Cap, 4.7 µF tantalum SP 196D475X0035JA1 1-444700-1
C4 Cap, 220 pF ceramic disc KE C410C221J1G5CA 1-402209-0
CR1-4 Diode, power FA 1N4002 1-194002-0
L1 Bead, ferrite EC 750-051-01 750-051-01
Q1 Transistor, PNP TI TIP42B 1-230042-0
Q2 Transistor, NPN TI TIP41B 1-220041-0
*R1, 2
R3
R4, 8
R5, 9
R6
R7
Res, 1 k carbon film
Res, 270 carbon film
Res, 5.6 k carbon film
Res, 5.1 carbon film
Res, 10 k carbon film
Res, 150 carbon film
ME 5043CX1K000J 6-171100-0
ME 5043CX270R0J 6-170270-0
ME 5043CX5K600J 6-171560-0
ME 5043CX5R100J 6-170005-1
ME 5043CX10K00J 6-172100-0
ME 5043CX560R0J 6-170150-0
* R1 is used for Options K and M, R2 for Option N.
8-3
Parts List Model 560H
MODEL E513-2A ENCLOSURE
(DWG 513-604)
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
C1, 3, 6 Cap, 47 µF 25 V SP CSR13E476KL 1-454700-1
C2, 5, 7 Cap, 1000 µF 35 V CA CAE1000/35 1-471000-0
CR1-3, 6-9, 11-14 Diode, signal FA 1N4148 1-194148-0
CR5-10 Diode, bridge GE W02M 1-190075-0
DS1 Lamp, power indicator HP 5082-4655 4-120014-0
F101 Fuse, 115 V ac 0.187 amp SB LF 313.187 2-160187-1
F101 Fuse, 230 V ac 0.1 amp SB LF 313.100 2-160100-1
J101, 102 Connector, card-edge CI 50-18-S10 1-314118-0
J103 Receptacle, power line SW EAC-301 3-840026-1
R1
S1 Switch, SPST CK 7101MD9AV2BE 7-110001-1
S2 Switch, 115-230 V SW EPS-2-PC3 2-170011-0
S101 Switch, DPDT CS 23-021-114 7-130001-0
T1 Transformer, power SL MPL-12-15 8-200012-0
TS101, 102 Terminal strip EV 814S/10.25.135.1053 3-830050-0
U1, 2A
U3
Res, 1 k carbon film
Regulator, 15 V
Regulator,15 V
Case EC 513-505-01 513-505-01
KO
FA 78M15UC 1-137815-0
FA 7915UC 1-137915-0
CF ¼ 1 k
6-171100-0
MODEL E513-6A
(DWG 513-613)
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
DS1 Lamp, power indicator MU L-28/40-RLC-R 4-121007-0
J1-6 Connector, 6-pin input BN PT02A-10-6S 1-310506-1
J7-18 Connector, output AM 31-010 1-311102-0
J19-24 Connector, amplifier CI 50-18-A-20 1-314018-0
J25 Receptacle, power line SW EAC-301 3-840026-1
P1-6 Connector, input mate BN PT06A-10-6P(SR) 1-310506-0
PS1
PS2 Power supply EC 513-510-01 513-510-01
S1 Switch, power CK 7201SYZGE 7-110006-0
S2 Switch, null indicators CK 7101SYZGE 7-110001-0
Power supply, 15 V
EC 513-506-01 513-506-01
8-4
Model 560H Parts List
MODEL R513-16 ENCLOSURE
(DWG 513-622)
REF DESIG DESCRIPTION MFR MFR P/N ECTRON P/N
C1-3 Capacitor, 4.7 µF/35 V tantalum SP 199D475X903CA2 1-444700-1
C4 Capacitor, 1 µF/100 V met plyester PA ECQ-E1105KZ 1-441006-0
CR1-3 Zener FA 1N752A 1-190752-1
CR4-5 Diode, signal NA 1N4148 1-194148-0
CR6 Zener MO 1962B 1-190962-0
DS1 Lamp, power indicator MU L-28/40-RLC-R 4-121007-0
F1 Fuse, 1 A SB 115 V LF 313.001 2-161000-1
F1 Fuse, 0.5 A SB 230 V LF 313.500 2-160500-1
J1-16 Connector, 6-pin input BN PT02A-10-6S 1-310506-1
J17-48 Connector, BNC AM 31-010 1-311102-0
J49 Connector, 8-pin remote BN PT02A-12-8S 1-310408-1
J50 Receptacle, power line SW EAC-309 3-840043-0
J51-66 Connector, amplifier CI 50-18-A-20 1-314018-6
P1-16 Connector, 6-pin input mate BN PT06A-10-6P(SR) 1-310506-0
P49 Connector, 8-pin remote mate BN PT06A-12-8P(SR) 1-310408-0
PS1 Power supply CL MMB50U-6-N 5-120028-0
PS2 Power supply CL R15U-15 5-120029-0
Q1-32 FET, n-channel SI VN0300M 1-240030-0
Q33 FET, n-channel SE BUZ71A 1-240071-0
Q34 Transistor GE 2N3415 1-203415-1
R1-6
R7-12
R13
R14
S1 Switch, null indicators CK 7201SYZGE 7-110001-0
S2 Switch, mode 1P5POS GR 56P30-01-1-05N-F 7-100074-0
S3 Switch, power CK T101S1T-C-G-E 7-110061-0
U1-U3 Optical isolator MN MCT-2 1-280000-0
U4 IC, converter SI 7661CJ 1-147661-0
Res, 560 carbon film
Res, 47 k carbon film
Res, 3.9 k carbon film
Res, 390 carbon film
KO
KO
KO
KO
CF ¼ 560
CF ¼ 47 k
CF ¼ 3.9 k
CF ¼ 390
6-170560-0
6-172470-0
6-171390-0
6-170390-0
ACCESSORIES FOR ALL ENCLOSURES
DESCRIPTION MFR MFR P/N ECTRON P/N
One-channel filler panel EC 516-503-40 516-503-40
Four-channel filler panel EC 516-503-55 516-503-55
Extender-board assembly EC 560-501-01 560-500-01
Line cord, power USA/Canada BE 17250B 3-840026-0
Line cord, power Europe IP 86511052 3-840040-0
Line cord, power UK IP 86240060 3-840041-0
Line cord, power Switzerland IP 86515050 3-840047-0
Line cord, power China IP 86517040 3-840054-0
Line cord, power Japan IP 86589000 3-840055-0
Line cord, power Australia IP 86210030 3-840057-0
Line cord, power Argentina IP 86270010 3-840058-0
Line cord, power Israel IP 86275010 3-840042-0
Line cord, power India IP 86265010 3-840046-0
8-5
Parts List Model 560H
8-6
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