Tektronix AM503B Reference manual
The OUTPUT DC LEVEL knob vertically positions the
signal on the oscilloscope screen.
SRQ, and REMOTE indicators give you GPIB status.
(AM5030 only.)
The CURRENT/DIVISION display shows the
current Amplifier scale factor in either
mA/division or A/division. Error codes and
output DC level also appear here.
The 20 MHz BW LIMIT button alternately selects
or deselects the 20 MHz bandwidth limit for
noise filtering.
Hold down the GPIB ADDRESS button while
adjusting the CURRENT/DIVISION buttons to
change the GPIB address. (AM 5030 only.)
The Amplifier output appears at the OUTPUT
connector. Connect this to a 50 input of
your oscilloscope.
Pull the release lever to remove the
Amplifier from the power module.
Copyright 1993 by Tektronix, Inc. All
rights reserved. Contents of this publication
may not be reproduced in any form without
the written permission of T ektronix, Inc.
First Printing: December 1993
First Time Operating Procedure
1. Turn off the power module that powers
the Amplifier.
2. Connect a current probe to the Amplifier
input connector.
3. Turn on the power module.
4. On an oscilloscope, set the coupling to
50 DC, the vertical sensitivity to
10 mV/division, and turn off any bandwidth filters.
5. On the oscilloscope, adjust the ground
reference so that the trace appears at the
center height of the screen.
6. Use a 50 coaxial cable to connect the
Amplifier OUTPUT to the 50 oscilloscope input. If the oscilloscope has only
1M impedance inputs, install a 50
termination between the oscilloscope
and the coaxial cable to the Amplifier.
PROBE OPEN and OVERLOAD indicate probe and
Amplifier status.
The PROBE DEGAUSS AUTOBALANCE button
removes residual magnetism from the attached
current probe. The probe must be removed from
the test circuit and locked.
The CURRENT/DIVISION buttons change the
Amplifier scale factor.
The COUPLING button selects AC or DC probe
coupling or a zero-current reference, as
indicated by the lights.
The current probes connect to the Amplifier at
the INPUT connector.
7. Unclamp the current probe from around
any conductor and lock the probe closed.
8. Press the COUPLING button until the
REF light comes on. (This step is not
necessary for subsequent degauss operations.)
9. Press the PROBE DEGAUSS AUTO-
BALANCE button. Wait until the
Amplifier is finished clicking.
10. Press the COUPLING button until either
the AC or DC light (your choice) comes
on.
11. Clamp the current probe around a current
carrying conductor. Observe the waveform on the oscilloscope screen, and
adjust it using the Amplifier controls: the
OUTPUT DC LEVEL knob and the
CURRENT/DIVISION
and but-
tons.
Operating Guidelines
To prevent equipment damage and increase
measurement reliability, observe these
guidelines:
Never insert the Amplifier into, or
remove it from, a power module unless
the power module is turned off.
Never connect a current probe to, or
remove it from, the Amplifier while the
power module is on, or while the current
probe is clamped around a current-carrying conductor.
Always observe the frequency derating
curve, and never exceed the upper frequency indicated. Failure to do so may
overheat the core of the current probe
and damage it.
Always remove power from a bare
conductor before clamping a current
probe around it.
Use an oscilloscope input channel hav-
ing an input impedance of 50 . If the
oscilloscope has only 1 M impedance
inputs, install a 50 termination between the oscilloscope and the coaxial
cable to the Amplifier. Do not install the
termination at the Amplifier end of the
cable.
Always set the oscilloscope vertical
sensitivity at 10 mV/division, and the
coupling to DC.
Always move the oscilloscope wave-
form using the Amplifier OUTPUT
LEVEL knob. Do not use the oscilloscope vertical position controls.
Degauss the current probe frequently.
Always remove the current probe from
around any conductors while degaussing.
Programming Commands
(AM5030 only)
ALLEve?
Returns pending event codes.
ERRor?
Returns the most recent error or event
code. Functions identically to EVent?
Reference
PROBEOPen?
Returns the status of the probe open indicator: ON or OFF.
AMPS <number>
AMPS?
Sets or queries AM5030 resolution (amperes per division).
BWLIMit ON
BWLIMit OFF
BWLIMit?
Sets or queries the status of 20 MHz bandwidth limit switch.
COUpling AC
COUpling DC
COUpling REF
COUpling?
Sets or queries the status of input coupling.
DCLEVel <number>
DCLEVel?
Sets or queries the DC offset level.
DEGAuss
DEGAuss 0
DEGAuss 1
DEGAuss 2
Performs probe degauss/autobalance. No
argument or 0 is full degauss/autobalance, 1 forces gain calibration even if
temperature has not changed, 2 performs
gain calibration without balancing the
Hall device.
EVent?
Returns the most recent error or event
code. Functions identically to ERRor?
EXit
Causes the AM5030 to exit test modes or
recover from error conditions.
FPLock ON
FPLock OFF
FPLock?
Enables or disables the front panel controls.
HELp?
Returns the list of AM5030 commands.
ID?
Returns the identification string.
INIT
Initializes the AM5030.
OVerload?
Returns the status of the overload indicator: ON or OFF.
PATH ON
PATH OFF
PATH?
Controls inclusion of command names in
query return strings.
PROBETRim <number>
PROBETRim?
Sets or queries trim adjustment gain factor.
PROBETYpe?
Returns the type of the connected current
probe or NOPROBE.
RQS ON
RQS OFF
RQS?
Enables or disables system requests
(SRQs).
SERIAL?
Returns AM5030 serial number .
SET?
Returns command string to return
AM5030 to its present state.
TEST
Perform self-test operation and return result.
UNIts?
Returns the units of output: A (amperes)
normally or V (volts) in special circumstances.
AM 503B & AM 5030
Current Probe Amplifier
070-8770-01
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