Tektronix AM 503 User manual

AM
503
CURRENT
PROBE
AMPLIFIER

7
e
I
d ronbc
INSTRUCTION MANUAL
Tektronix, Inc .
P .O . Box 500
Beaverton, Oregon

97077

Serial Number
COMMITTED TO EXCELLENCE
PLEASE CHECK FOR
CHANGE INFORMATION
AT THE REAR OF
THIS MANUAL .
AM 503
CURRENT PROBE
AMPLIFIER
070-2052-01

First Printing SEP
1976
Product Group 75

Revised DEC
1985

Copyright `'
1976,
1979
Tektronix, Inc .
All rights reserved .
Contents
of this publication may not be
reproduced in any
form
without the written permission of
Tektronix, Inc .
Products of
Tektronix, Inc . and its
subsidiaries are covered
by U .S . and
foreign patents and/or
pending patents .
TEKTRONIX,
TEK, SCOPE-MOBILE, and

ilk

are
registered
trademarks of Tektronix,
Inc
.
TELEQUIPMENT
is a registered
trademark of Tektronix U .K
. Limited .
Printed in U .S .A
. Specification and
price change privileges
are reserved .
INSTRUMENT SERIAL NUMBERS
Each instrument has a
serial number on a
panel insert, tag,
or
stamped on the
chassis . The first number or
letter
designates the
country of manufacture . The last
five digits
of
the serial
number are assigned
sequentially and are
unique to each
instrument . Those
manufactured in the
United States
have six unique digits .
The country of
manufacture is
identified as follows :
B000000

Tektronix, Inc ., Beaverton,
Oregon, USA
100000

Tektronix
Guernsey, Ltd ., Channel
Islands
200000

Tektronix United Kingdom, Ltd .,
London
300000

Sony/Tektronix, Japan
700000

Tektronix Holland, NV,
Heerenveen,
The Netherlands

TABLE OF
CONTENTS
Page
OPERATOR'S SAFETY
SUMMARY ..... ............... . . .... ..............
SERVICE SAFETY SUMMARY ... ...... .............. . . . .... ..............

V
SECTION 1

OPERATING
INSTRUCTIONS ......... ...... ................

1-1
SECTION 2

SPECIFICATION AND PERFORMANCE CHECK . .
................

2-1
WARNING
The remaining
portion of this Table of Contents lists servicing instructions that expose
personnel to hazardous voltages . These instructions are for qualified
service personnel only .
SECTION 3

ADJUSTMENT ...... ............... ..... ................

3-1
SECTION 4

MAINTENANCE ... . . ................ ..... ...............

4-1
SECTION 5

CIRCUIT DESCRIPTION .............. ..... ................

5-1
SECTION 6

REPLACEABLE
ELECTRICAL PARTS .... . . .... ...............

6-1
SECTION 7

DIAGRAM AND CIRCUIT BOARD ILLUSTRATION
. ...............

7-1
SECTION 8

REPLACEABLE MECHANICAL PARTS
AND EXPLODED VIEW .......

8-1
CHANGE INFORMATION

AM
503
LIST OF
ILLUSTRATIONS
Fig .
No .
Page
No .
1-1 Plug-in installation
and removal ... .............. ....... ..............
1-1
1-2 AM 503
controls and connectors . . . ...............
..... ..............
1-3
2-1 Test setup
for AC Dynamic Range
check
.
. ........... ..... .............
2-7
2-2
Display of tangentially measured
noise .... ............. ........ ........ 2 - 8
3-1 Construction
details for Special Adapter ...... ............ ............
. .
3-3
3-2 Power supply
test point and adjustment
locations . . . ......... .............
3-3
3-3 Gain
and compensation adjustment
locations ....... ..............
.......
3-5
3-4
Example of correct compensation .........
........ .............. . . . . .
3-5
4-1 Lubrication procedure
for a typical cam switch
. . ......... ................
4-2
42 Semiconductor
lead configurations ........... ........
................
4-4
43 Installation
of lead-end connectors ..............
....... ..............
47
44 Circuit board pin and
ferrule assembly .............. ...... ..............
47
5-1 AM 503and
probe waveforms ........ ..............
......... ........
5-1

OPERATOR'S
SAFETY SUMMARY
The followi ng text contai ns a two-part summary of general
safety precautions that must be observed
during all
phases of operation,
service, and repair of this instrument .
OPERATORS SAFETY
SUMMARY
The general safety information in this part of the summary
is for both operating and servicing personnel
.
Specific
warnings and cautions will be found throughout
the
manualwhere they apply, but may
not appear in this
summary .
In This Manual
TERMS
CAUTION statements
identify conditions or practices that
could
result i n damage to the equipment or other property .
WARNING statements
identify conditions or practices
that could result in personal
injury or loss of life .
As Marked on Equipment
CAUTION indicates a personal injury hazard
not im-
mediately accessible as one reads the marking, or a
hazard to property including the
equipment itself .
DANGER indicates a
personal injury hazard immediately
accessible as one reads the marking .
In This Manual
SYMBOLS
A
This symbol indicates where applicable
cautionary or other information
is to be
found .
As Marked on Equipment
DANGER - High voltage .
REV A NOV 1979
Power Source
Protective ground (earth)
terminal .
ATTENTION - refer to manual .
This product is intended to operate from a power source
that
will not apply more than 250 volts rms between the
supply conductors or between either supply
conductor
and ground . A protective ground
connection bywayofthe
groundingconductor in the power cord is essential for
safe operation .
Grounding the Product
This product is grounded through the grounding conduc-
tor of the power cord . To avoid
electrical shock, plug the
power cord into a properly
wired receptacle before
connecting to
the product input or output terminals . A
protective ground connection by way of the grounding
conductor in the power cord is essential for safe
opera-
tion .
Danger
Arising From Loss of Ground
Upon loss of the protective-ground
connection, all
accessible conductive
parts (including knobs and con-
trols
that may appear to be insulating) can render an
electric
shock .
Use the Proper Power Cord
Use only a power cord that is in good
condition .
Use the Proper
Fuse
Use
only the power cord and connector specified for your
product .
Refer cord and connector changes to qualified service
personnel .
To avoid fire hazard, use only the fuse of correct
type,
voltage rating and current
rating as specified in the parts
list for your product
.
Refer fuse replacement to qualified service personnel .

AM 503
Do Not
Operate in Explosive
Atmospheres
To avoid
explosion, do not operate
this product in an
explosive
atmosphere unless it has
been specifically
certified
for such operation
.
Do Not Remove
Covers or Panels
To avoid personal
injury, do not remove the
product
iv
covers or
panels . Do not
operate the product
without the
covers and panels
properly installed .
Do Not
Operate Without
Covers (for TM 500
plug-
ins
only)
To avoid personal
injury, do not
operate this product
without covers or panels
installed .
Do not apply
power to
the plug-in
via a plug-in
extender .
REVA NOV
1979

Do Not Service Alone
REVA NOV 197 9
SERVICING SAFETY SUMMARY
FOR QUALIFIED SERVICE
PERSONNEL ONLY
Do not perform internal service
or adjustment of this
product unless another person
capable of rendering first
aid and resuscitation
is present .
Use Care
When Servicing With Power On
Dangerous voltages
exist at several points in this product .
To avoid
personal injury, do not touch exposed
connec-
tions and components while power is
on .
Refer also to the preceding
Operators Safety
Summary .
AM 503
Disconnect power before
removing protective panels,
soldering, or
replacing components .
Power Source
This product is
intended
to
operate from a power source
that will not apply
more than 250 volts rms between the
supply
conductors or between either supply conductor
and ground . A protective ground
connection by way of the
grounding conductor
in the power cord is essential for
safe operation
.
v

AM 503
2052-9
REVA
NOV 197 9

All
references
to the P6302 probe also apply to the
A6302 probe .
All
references to the P6303 probe also apply to the
A6303
probe .
Description
OPERATING
INSTRUCTIONS
NOTE
The AM 503 Current
Probe Amplifier is designed for
use with any of the compatible
current probes (see
Mechanical Parts
list for accessories) . The input
attenuator is
calibrated in a 1, 2, 5 sequence, and the
attenuator
knob-skirt illumination provides
direct indica-
tion of current/division . An auto-scale
switch changes the
knob-skirt illumination automatically to
match the sen-
sitivity of the probe used .
Bandwidth is selectable for either FULL
(limited by
current probe in use) or 5 MHz
.
Input
coupling is selec-
table (ac or dc) ; ac provides a
means of measuring low
amplitude ac
signals on a high level do current .
Installation and Removal
RELEASE LATCH
PULL TO REMOVE
(1431-21)2052-37
REVJUN 198 1
Fig
.
1-1
.
Plug-in
installation and removal .
Section
1-AM 503
The AM 503 operates
in TEKTRONIX TM 500-Series
power modules
only . It will operate i n any compartment of
a multiple-compartment
power module .
Turn
the power module off before inserting the plug-
in ; otherwise, damage may occur to the plug-in
circuitry . It is also recommended that the
power
module be turned off before
removing the AM
50,'~
Refer to Fig .
1-1 . Check to see that the plastic
barriers
on the interconnecting jack of the selected
power module compartment match the cut-outs in
the AM 503 circuit board edge
connector .
Alignthe upper and lower groove of the AM 503 chassis
with the upper and lower guides of the selected compart-
ment . Push the module in and press firmly to seat the
circuit board in the interconnecting jack .
To remove the
AM 503, pull on the release latch

Operating Instructions-AM
503
(located in the lower left
corner) until the
interconnecting
jack disengages and
the AM 503 will slide
out .
OPERATING
CONSIDERATIONS
Introduction
The remainder of this
section contains the
operating
information required
to obtain the most
effective perfor-
mance
from the instrument .
This includes the function
and actions of the controls and
connectors, input
connec-
tions, and a general
description of the operating
modes
and procedures
for making basic
measurements .
Controls and Connectors
All
of
the major controls
and connectors for operation
of
the AM 503 are located
on the front panel of
the unit . A
brief functional
description of each
control and connector
is included
in Fig . 1-2 .
Monitor Oscilloscope
The
bandwidth required of the
oscilloscope used
with
the AM 503 depends upon
the frequency of the signal
being measured . Oscilloscope
vertical bandwidth
should
be at least twice the
frequency of the
signal being
measured .
Deflection .
Conventional current flowing
in the direc-
tion of the arrow on
the current-probe
slider produces a
positive
deflection of the oscilloscope
display .
Ground-clip Leads
Ground-clip
leads are furnished
with some current
probes to
ground the cable
shield at the probe end .
The
ground
lead is used to
reduce high-frequency
elec-
trostatic voltages
that could couple into the
probe and
cause errors in measuring
. A ground lead is
normally not
used in the
lower (1, 2, 5, and 10
mA) sensitivity positions
of
the attenuator switch
because of undesirable chassis
currents that may appear
in these more
sensitive
positions .
When observing
high-frequency signals, use
the
shortest practical
ground-clip lead available .
Output
Connection
output connection can be
accomplished through
the
OUTPUT INTO 50 f2
connector or the rear
interconnec-
ting jack at pin
28A . Pin 28A at the rear
interconnecting
jack is terminated
in 50 S2 . Connector
J480, located onthe
right side
upper-rear of the
instrument, is where the
output
cable connects
for rear interface output
. With the output
cable connected
for rear interface output,
atermination is
not required
because of the
internal (factory
wired)
termination . The monitor
oscilloscope input
impedance
should not be 50 O if the
rear interface connection
is used .
It will cause an
impedance mis-match
and possible
loading of
the AM 503 .
Changing output to rear
interface . Remove the right
side snap-in cover from
the AM 503 . Unplug the
coaxial
cable from the rear of
the OUTPUT INTO 50 O connector .
Carefully align the
coaxial cable at the upper-rear
coaxial
connector ; pressing
firmly, insert the cable .
The coaxial cable connector
center pin is easily bent
and alignment is
critical when making the connec-
tion for rear
interface output .
With the output cable
(internal) connected to the rear
interconnecting jack
output, the front-panel
OUTPUT
INTO 50
O connector will not have
an output signal
available
.
Connecting
the AM 503
Install
the AM 503 into the
TM 500-Series power
module
. Ensure that the
power module into
which the
AM 503 will be installed
is suitably adapted to
the line
voltage to be
applied .
Connect a 50 0 cable
with bnc connectors
(and if
necessary, a 50
O termi nation for impedance
matching) to
the monitor
oscilloscope vertical input
.
Set the monitor
oscilloscope vertical
sensitivity for
10 mV/Div .
The horizontal sweep speed
should be consis-
tent
with the signal frequency to be
examined .
Connect a current
probe to the AM
5031NPUTconnec-
tor .
Turn
all equipment on and
allow 20 minutes for the
equipment to warm up
and stabilize .
REV B NOV 197 9

DC LEVEL Control : Adjusts the
OUTPUT do level to offset largo
do currents or change
signal
vi :rti-l p-tior
INPUT OVERLOAD Indicator :
Indicates that the measured
current exceeds the maximum
do current rating of
the Current
Probe (signal distortion
will
occur)
.
CURRENT/DIV Switch :
Selects
deflection factor
from 1 mA/Div
to
50 A/Div depending on
current probe used . Auto-
scaling changes the
dial range
by a
factor
of
10 .
BANDWIDTH Switch
: Provides
a
choice of bandwidths .
FULL : Permits amplifier
and
probe
system to operate at full
rated
bandwidth .
5
MHZ : Reduces the bandwidth
to
about 5 MHz to increase the
signal-to-noise ratio for low-
frequency, low-level
measurements
.
REVC
NOV 197 9
F' . ;:,tL ,
Y4'tD1H
RELEASE LATCH :
Pull to
t, : dove plug-in
.
BALANCE (screwdriver
adjustment) : Permits
operritorto
!-Iaiice
probe
for minimum
tr,p
,
shift as CURRENT DIV
- .tt ;,w, are changed .
Fig . 1-2 . AM 503
controls and connectors .
INPUT Connector : Provides
c m),~, tion for current probe .
Operating Instructions-AM 503
DEGAUSS
(push-button
switch) : Momentary contact
switch for energizing probe
degauss circuit .
PROBE UNLOCKED Indicator :
Indicates probe slider is not
in
locked or
closed position
AC-CAL DC LEVEL-DC Switch :
Selects signal input coupling
mode .
AC : The ac component of tI
signal is coupled tothe
amplifier
and
the do component is
blocked .
DC : Both ac and do components
of the input signal are coupled to
the Output Amplifier input .
CAL DC LEVEL : Grounds
th
Output Amplifier input to permit
adjusting the amplifier output do
level .
OUTPUT INTO 50 O
: bnc
connector for connecting
amplifier output to monitor
oscilloscope (must be
terminated into 50 S2) .
2052-38

Operating Instructions-AM
503
Using the AM 503 with Probe
Set the monitor oscilloscope
vertical input to ground
and position the trace
vertically to graticule center . Reset
the
monitor oscilloscope vertical input to do coupling .
Set the AM 503 AC-CAL DC
LEVEL-DC switch to the
CAL DC
LEVEL position . Rotate the DC LEVEL control to
position
the monitor oscilloscope trace to graticule
center .
With the
current probe slide in the closed position
(not
connected around a conductor) press and release
the
DEGAUSS button .
NOTE
Removal of any magnetic flux present in the probe
transformer core always requires degaussing the
probe . This is important after connecting or
reconnecting the probe, or after
making meas-
urements in excess of the instrument range .
Set the AM 503 AC-CAL DC LEVEL-DC switch to DC .
Set the CURRENT/DIV full clockwise . Adjust the screw-
driver
BALANCE control
to
position the monitor os-
cilloscope trace to graticule center .
The AM 503 and current probe are balanced, degauss-
ed, and ready to measure
current in a conductor . The
CURRENT/DIV switch is calibrated for use at the
10 mV/Div monitor oscilloscope vertical sensitivity .
However, for low amplitude currents (less than 2
mA),
added resolution may be gained by changing the monitor
oscilloscope sensitivity to 5 mV/Div . With the vertical
sensitivity at 5 mV/Div, the AM 503 1 mA/Div sensitivity
becomes 0 .5 mA/Div .
The AM 503 internal circuitry, in conjunction with a 10X
probe, has a feature for automatically changing the
amplifier gain . When the gain is changed for a 10X probe,
the CURRENT/DIV knob-skirt illumination
changes
to
display the corresponding
switch range . If a 10X probe is
used
(e .g .,
P6303), the lowest range on the CURRENT/DIV
switch becomes 10 mA/Div . Again, the monitor os-
cilloscope sensitivity can be changed to increase the
monitor oscilloscope resolution for viewing lower
amplitude
signals
.
Insertion Impedance
The insertion impedance of the current probe is the
equivalent circuit that is placed in the circuit
under test
when the probe is clamped
around a conductor . When
observing fast-rise signals the insertion impedance
should be considered to minimize loading . Consult the
Instruction sheet for the probe in use to find
the
relationship of frequency to insertion impedance
devia-
tion .
High Currents
When measuring high currents, do not disconnect
the probe cable from the AM 503 while the probe is
clamped around the conductor
.
With the
probe
cable disconnected (unterminated), thehigh voltage
developed in the secondary winding of the trans-
former may damage the current probe .
When measuring over 40 amperes peak (with a 1X
probe), the AM 503 output may overdrive the monitor
oscilloscope vertical display . When measuring these high
currents, change the monitor oscilloscope vertical sen-
sitivity to 20
mV/Div . With the vertical sensitivity at
20
mV/Div, the AM 503 5 A/Div sensitivity becomes
10 A/Div .
Maximum Currents
The maximum peak-to-peak currents (approximate) in
amperes vs . signal frequency derating curve is listed
in
the
appropriate
instruction
sheet
for the current probe in use .
Current is derated for a continuous signal to prevent
excessive heating in the probe head .
INPUT OVERLOAD indicator light . The front panel
indicator lights when the measured current exceeds the
maximum
do
current rating
of
the
probe
in use
.
The
monitor oscilloscope display (regardless of
input
coupl-
ing) may be inaccurate with the INPUT OVERLOAD lamp
lit .
@ NOV 1979

SPECIFICATION AND PERFORMANCE
CHECK
Performance Conditions
The electrical characteristics are valid only if the
AM 503 has been calibrated at an ambienttemperature
between +20°
C
and
+30'C
and
is operating at an ambient
temperature between 0°C and
+50°C, unless otherwise
stated .
REV
SEP
1984
SPECIFICATION
Table
2-1
ELECTRICAL CHARACTERISTICS
Section 2-AM 503
Items listed in the Performance Characteristics column
of the Electrical Characteristics are verified by completing
the Performance Check in this section of the manual .
Items listed in the Supplemental Information column are
not verified in this manual . The items are either ex-
planatory notes or performance characteristics for which
no limits are specified .
Characteristics Performance Characteristics Supplemental Information
Bandwidth (-3 dB)
Full OUTPUT terminated into
5012,
DC
function
Amplifier Only DC to at least 100 MHz .
with P6303 DC to at least 15 MHz .
with P6302 DC to at least 50 MHz .
5 MHz 5 MHz, ±1 MHz
ac coupled, lower limit -7 Hz
Rise time (full bandwidth) _3 .5 ns
Noise
Ampl
random _-4 mV BANDWIDTH Full, function in CAL DC
(1
st two cw positions of LEVEL
;
do level adjusted for zero do out
CURRENT/DIV
switch)
Amplrandom (CURRENT/DIV _-0
.8 mV
switch
ranges except 1st
two
cw positions)
Random (typical probes)
P6302 _-0
.3
mA (Tangentially
measured) BANDWIDTH Full, function in DC ;
CURRENT/DIV
full cw ; DC LEVEL
adjusted for zero do out
P6303
<3
mA (Tangentially
measured)
Attenuator Accuracy Within 3% of indicated
Current/Division

Specification
and Performance
Check-AM 503
2-2
Standard Instrument
Table
2-1 (cont)
ELECTRICAL CHARACTERISTICS
POWER
CONSUMPTION
L
Table
2-2
ENVIRONMENTAL
CHARACTERISTICS
--17 W
REV B NOV 1979
Characteristics
Performance
Characteristics
Supplemental
Information
Deflection Factor
(typical probes)
P6302
1 mA to 5 A/div in a 1,
2, 5
sequence
P6303
10
mA to 50 A/div in a 1, 2, 5
sequence
Thermal Drift
Amplifier Only
In first two cw positions ;
2 mV/°C
or less at
OUTPUT (from +15°C to
+35°C
ambient)
In all but first two
cw positions ;
0 .4 mV/°C
at OUTPUT (from
+15 0
C
to
+35 0 C ambient)
OUTPUT dynamic range
+80 mV and -80
mV with less
CURRENT/DIV set to 5
mA/Div .
than 5%
compression (into 50 i2)
Monitor oscilloscope set for
20 mV/div
Characteristics
Information
Temperature
Test to procedures
of MIL-STD-810CMethods
502 .1 and 501 .1 using
Procedure
I as specified in MIL-T-2880013
paragraph 4 .5 .5 .1 .3
and 4 .5 .5 .1 .4 .
Operating
0°
C
to +50° C .
Non-operating
-55° C to +75° C .
Humidity
Operating
+50°C to 95% relative
humidity .
Non-operating
+60°C to
95% relative humidity .
Test to MIL-STD-810C Method
507 .1 Procedure IV, modified
as specified in
MIL-T-2880013 paragraph
4 .5 .5 .1 .1 .2 .
Altitude
Test to MIL-STD-810C
Method 500 .1 Procedure
I as specified in
MIL-T-2880013
paragraph
4 .5 .5 .2 .
Operating To
15,000 feet .
Non-operating
To 50,000 feet .

Introduction
This procedure checksthe electrical characteristics of
the AM 503 that appear in the Specification section of this
manual
.
If the instrument fails to meet the requirements
given in this performance
check, the adjustment
procedure should be performed . This procedurecan also
be used by an incoming inspection facility to determine
acceptability of performance .
The electrical characteristics in Section 2arevalid only
if the AM 503 is calibrated at an ambienttemperature of
+20'C
to +30° C and operated at an ambient temperature
of 0°
C
to
+50'C .
REVB NOV 1979
Table 2-2 (cont)
ENVIRONMENTAL CHARACTERISTICS
Table 2-3
PHYSICAL CHARACTERISTICS
PERFORMANCE CHECK
Specification and Performance Check-AM 503
Tolerances that are specified in this Performance
Check procedure apply to the instrument under test and
do not include test equipment error .
Test Equipment Required
The following test equi pment, or equivalent, is required
to perform the performance check
.
Test equipment
characteristics listed are the minimum required to verify
the performance of the equipment under test . Substitute
equipment mustmeet or exceed the stated requirements .
All test equipment is assumed to be operating within
tolerances .
2- 3
Characteristics Information
Vibration
Operating and With the instrument operating, the vibration frequency is swept from 10 to 55
Non-operating to 10 Hz . Vibrate 15 minutes in each of the three major axes at 0 .015"
total
displacement . Hold 10 minutes at any major resonance, or if none,
at 55 Hz . Total time, 75 minutes .
Shock
Non-operating 30 g's 1/2 sine, 11 ms duration, 3 shocks in each direction along 3 major
axes, for a total of 18 shocks .
Transportation Qualified under
National
Safe Transit
Committee
Test Procedure
1A,
Category II .
Characteristics Information
Maximum Overall Dimensions
Height -5 inches (12 .7 cm)
Width
=2 .6 inches (6 .7
cm)
Length -11 .7 inches (29 .8 cm)
Front Panel
Finish Anodized aluminum
NetWeight -=2 lbs .

Specification and
Performance Check-AM 503
Special
test devices are used where
necessary to

Tektronix, Inc ., and
can be orderedthrough your local
facilitate the procedure . Most of
these are available from

Tektronix Field Office or representative .
Table 2-4
LIST
OFTEST EQUIPMENT
REQUIREMENTS
2- 4
REV
B NOV 1979
Description
Minimum Specifications
Usage
Examples
1 . Test Bandwidth
: do to 150 MHz ; All amplifier
output TEKTRONIX 7704A
with 7A16A
Oscilloscope
minimum vertical deflection
measurements Amplifier
and 71380 Time Base
5 mV/Div ; minimum Time/Div,
2 ns .
2 . Power Module
Provide power to
TEKTRONIX TM 503 or
TM 506
TM 500-Series
AM 503 and test
or
TM 515
equipment
3 . Digital Ranges (ac
rms), 0-200 mV, Dynamic
range TEKTRONIX DM 502'
Voltmeter 0-2
V ; Accuracy, ±0 .5%
±1 count at 1 kHz .
4 .
Calibration Amplitude
Calibrator andtwo
TEKTRONIX PG
506' Pulse Generator
Generator pulse modes
: High Amplitude Noise .
Rise Time
and Fast Rise Amplitude
Bandwidth
Calibrator .
Amplitude to
5 V, p-p into 50 C2 ;
period, approx . 1 ms .
High
AmplitudeOutput : Period
1 /is to
10 ms ; duty cycle, approx .
50%
; amplitude range, 0 .5 V or less
to at least 5 V .
Leading edge
aberrations within
2%,
into 50 Q .
Fast Rise Output . Period
1
/is
to 10 ms ; duty cycle,
approx .
50% ; amplitude
range, 100 mV or
less to at least
1 .0 V into 50 Q .
Rise time
(terminated in 50 S2),
1
.0
ns or less ; leading edge
aberrations, within
2% during
first 10 ns ;
flatness
within 0 .5% after first 10 ns ;
trigger output (terminated
in
50
O),
positive
going
signal is
at least 1 .0 V .
5 . Constant
Frequency range, to at least
Bandwidth Checks
TEKTRONIX SG 503' Leveled Sine-
Amplitude Sine- 50 MHz with 50
kHz
Wave Generator
Wave Generator
reference frequency ; Amplitude
range to 4 V p-p ; impedance,
50 0 ; amplitude
accuracy
(50 kHz
reference) within 3%
of indicated
amplitude on 5 V
range, into 1% termination ; flat-
ness, output amplitudedoes not

8
Requires TM 500-Series Power Module .
Table
2-4 (cont)
LIST OF
TEST EQUIPMENTREQUIREMENTS
Specification
and Performance Check-AM 503
Preliminary Procedure

1 . Check
Current/Division Accuracy
1 . Ensure
that all power switches are off .

Set the following controls as indicated :
2 . Ensurethat all test equipment
and the power module
into which
the AM 503 under test will be installed are
suitably adapted to the line voltage to be applied .
3 . Install the AM 503
into the power module, and if
applicable, install all other TM 500-Series test equipment
into the power module .
4 . Connect the power
module(s) and test equipment to
a suitable
line voltage source . Turn all equipment on and
allow at least 20 minutes for the equipment to warm up and
stabilize .
REV B DEC 1980
AM 503
CURRENT/DIV

5 A
Coupling

DC
BANDWIDTH FULL
Calibration Generator
Amplitude

lo v
Mode

std ampl
Monitor Oscilloscope
Volts/Div

5 mV
Time/Div

50 /is
Input Coupling

do
Triggering

ext
2-5
Description
Minimum Specifications Usage
Examples
5 . Constant
Amplitude
Sine-
Wave Generator
vary more
than 3% from actual
(cont)
amplitude of 50 kHz reference
to 50 MHz .
6 . Function Output
frequency, approx . Ac low frequency
TEKTRONIX FG 502 8
Generator 5
Hz to 1 kHz ; amplitude, -3 dB
point check .
(into 50 S2), or 5 V p-p ;
Dynamic range
Amplitude flatness (sine
wave),
+1 .5 dB throughout
required
frequency range .
7 . Cable Impedance, 50
f2
;
Used in all test setups .
Tektronix Part No .
(3 required)
length, 42 inches ;
012-0057-01
connectors, bnc
8 . Termination Impedance, 50
S2,
in-line ;
Used in all test setups Tektronix
Part No .
(2 required) connectors, bnc
011-0049-01
9 . Special Adapter Impedance,
25 S2, in-line ; Used in all test
setups See Fig . 3-1
connectors, bnc
10 . Adapter bnc `T'
AC Dynamic Tektronix
Part No .
Range
103-0030-00
11 . 10X Impedance, 50 O
;
Noise ;
Dynamic range Tektronix Part No .
Attenuator connectors, bnc
011-0059-02
(3 required)

Specification and Performance
Check-AM 503
a . Connect the OUTPUT of the
AM 503 to the input of
the
monitor oscilloscope using a 50 0 cable and a 50 O
terminator .
b .
Connect the Ampl Output of the calibration
generator to the AM 503 INPUT using the special adapter
(see Fig . 3-1) and a 50 0 cable .
c . Using the AM 503 DC LEVEL control andthe
monitor
oscilloscope vertical position control, center
the display .
e
.
Set
the AM 503, calibration generator, and
monitor
oscilloscope as indicated in Table 2-2 .
f . Check-that the signal amplitude in each step isfive
divisions ±0 .15 division .
2 . Check AC
Dynamic Range
2-6
d . Check-that
the signal amplitude is two divisions .
Table 2-2
CURRENT/DIVISION ACCURACY
CONTROL SETTINGS
g .

Remove test connections
.
Set the following controls as
indicated :
AM 503
CURRENT/DIV

5 mA
Coupling

DC
BANDWIDTH
FULL
Low FrequencySine-Wave Generator
Frequency

100 Hz
Amplitude

Minimum
Offset

Off (in)
Monitor Oscilloscope
Volts/Div

20 mV
Coupling

do
Time/Div

5 ms
a . See Fig
.
2-1 for
test setup .
b . Set the sine-wave generator for
28 .3 mV,rms out of
the AM 503 (monitor oscilloscope
indicates 80 mV, peak-
to-peak) .
c . Set monitor
oscilloscope input coupling to gnd .
Position
trace vertically four divisions below the center
graticule line
.
d . Reset monitor oscilloscope
input coupling to dc .
e . Set AM 503 coupling to CAL DC
LEVEL .
f . Adjust AM 503 DC
LEVEL to position trace vertically
four divisions below
the center graticule line .
g . Reset the AM 503
coupling to DC .
h . Using the AM 503 DC
LEVEL control, center the
sig-
nal on the center graticule
line .
i . Check-DVM
should read at least 26 .9 mV rms or
greater .
j . Set monitor oscilloscope
input coupling to gnd .
k . Position
the trace vertically four divisions
above the
center graticule
line .
I . Reset the monitor oscilloscope
input coupling to dc .
m .
Set the
AM 503 coupling to CAL DC LEVEL
.
REV
NOV 1981
AM
503
Calibration
Generator
Monitor Oscilloscope
VOLTS/DIV
2 .0A 10 .0V 5 mV
1 .0A 10 .0V 10
mV
0 .5A 5 .0V
10 mV
0 .2A
2 .0V 10 mV
0 .1A 1 .0V 10 mV
50 m A 0 .5 V 10 mV
20mA 0 .2V 10
mV
10 mA 0 .1 V
10 mV
5
mA 50 mV 10 mV
2 mA 20 mV 10 mV
1 mA 20 mV
20 mV

LOW-FREQUENCY
SINE-WAVE
GENERATOR
.
50
f2
CABLE
SPECIAL
ADAPTER
AM 503
50 D
10X ATTENUATOR

TERMINATION

BNC 'T'
(50 S2)

ADAPTER
MONITOR
RMS
OSCILLOSCOPE
READING
DVM
2052-39
n . Adjust the AM 503 DC
LEVEL control to position the

Monitor Oscilloscope
trace four
divisions above the center graticule
line .
Volts/Div

10 mV
Time/Div

10 us
o . Set the
AM 503 coupling to DC .

Input Coupling

gnd
Triggering

ext
p . Using the AM 503 DC LEVEL control, center the sig-
nal
on the center graticule line .
q . Check-DVM should read at
least 26 .9 mV rms or
greater .
r . Remove test
connections .
3 . Check Amplifier Noise
Set the following controls as indicated :
c .
Setthe monitor oscilloscope vertical
Positioncontrol
CURRENT/DIV

1 mA

so
that the trace is on the center
graticule line .
BANDWIDTH FULL
Coupling

CAL
DC
LEVEL
d .
Set the monitor oscilloscope
input coupling to dc .
Mode

Fast Rise
Period

1
ms
Pulse Amplitude

midrange
(Use short cables .)
REV NOV 198 1
AM 503
Calibration Generator
Fig . 2-1 . Test setup for AC Dynamic Range Check .
Specification and
Performance Check-AM 503
a . Using a 50 0 cable
and a 50 O termination,
connect
the AM 503
OUTPUT to the input of the
monitor os-
cilloscope
.
b . Attach the
three 10X attenuators to the
+Fast Rise
Output of
the calibration generator . Using a50
0 cable
andthespecialadapter, connecttheAM
5031NPUTtothe
attenuators .
e .
Using the AM 503 DC
LEVEL control, position the
trace to the center graticule
line .
f . Set the
AM 503 coupling to DC .
2-7