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Introduction to the 5000-Series Oscilloscopes: Difference between revisions

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Introduction to the 5000-Series Oscilloscopes (view source)

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The mechanical aspects of the TM500 line of modular instrumentation and those of
The mechanical aspects of the TM500 line of modular instrumentation and those of
the 5000-series are identical except for the interface connector keying. There has
the 5000-series are identical except for the interface connector keying, however,
been an instance of a TM500 frequency counter installed in a 5000-series mainframe
'''TM500 instruments and 5000-series instruments are electrically totally incompatible
With each other, and any attempt to operate one type of plug-in in the other type of mainframe
may result in the destruction of the plug-in, mainframe or both.'''
 
(There has been an instance of a TM500 frequency counter installed in a 5000-series mainframe
with the LED display bright and presumably active, as the photo illustrated for
with the LED display bright and presumably active, as the photo illustrated for
some items being sold on an on-line auction.  But  it is suspected that this image
some items being sold on an on-line auction, but it appears likely that this image
was “Photo-shopped” by the unscrupulous seller. This error had been pointed out to
was “photoshopped” by the unscrupulous seller.)
the seller by this potential buyer with no response from him.
 
Here is the mandate:  TM500 INSTRUMENTS AND 5000-SERIES INSTRUMENTS ARE ABSOLUTELY
AND TOTALLY INCOMPATIBLE WITH EACH OTHER.  ATTEMPTING TO OPERATE ONE TYPE IN
ANOTHER TYPE OF MAINFRAME WILL RESULT IN THE DESTRUCTION OF THE PLUG-IN, MAINFRAME
OR BOTH.


In the 5000-series, all power supply voltages are developed
In the 5000-series, all power supply voltages are developed by the mainframe and  
by the mainframe and supplied to the plug-ins as regulated voltages:  +5 V, ±15 V
supplied to the plug-ins as regulated DC voltages of +5 V, ±15 V (5400-series) and ±30 V.   
(5400-series) and ±30 V.  There are no power supply circuits other than supply
There are no power supply circuits other than supply decoupling and small zener regulators in the plug-ins.
decoupling and small zener regulators in the plug-ins.


On the other hand, the TM500-series power modules (the “mainframes”) supply AC and
On the other hand, the TM500-series power modules (the “mainframes”) supply AC and
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are not supplied on similar interface connector pins as the 5000-series.  All of
are not supplied on similar interface connector pins as the 5000-series.  All of
the power supply regulation control circuitry is inside the individual plug-in for
the power supply regulation control circuitry is inside the individual plug-in for
customized voltages, since each plug-in instrument is a radical design departure
customized voltages, since each plug-in instrument is a radical design departure
from the other instruments.  The power module also contains one NPN and one PNP
from the other instruments.  The power module also contains one NPN and one PNP
power transistor for each compartment for use by the instrument installed as a
power transistor for each compartment for use by the instrument installed as a
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a 5A22N and selectively limit the upper frequency cutoff.
a 5A22N and selectively limit the upper frequency cutoff.


Some may think that this low bandwidth makes the 5100-series worthless.  In
Some may think that this low bandwidth makes the 5100-series worthless.   
reality, there are five things that make the 5100-series attractive:
In reality, there are five things that make the 5100-series attractive:
# Those who work in the low-frequency arena of audio sound systems,  LF and  VLF radio, mechanical transducers, hearing aids, etc. will find the lack of HF noise in the 5100-series to be a blessing;
# Those who work in the low-frequency arena of audio sound systems,  LF and  VLF radio, mechanical transducers, hearing aids, etc. will find the lack of HF noise in the 5100-series to be a blessing;
# The plug-in versatility of the 5100-series can be matched only by that of the 7000-series, and then at a far higher price in cost and complexity;  
# The plug-in versatility of the 5100-series can be matched only by that of the 7000-series, and then at a far higher price in cost and complexity;  
# A large display screen, internal graticule and fine, sharp trace;   
# A large display screen, internal graticule and fine, sharp trace;   
# Simple and easy troubleshooting and repair, usually involving no custom, complex and hard-to-find [[:Category:Tektronix-made integrated circuits|Tektronix-made custom ICs]];
# Simple and easy troubleshooting and repair, usually involving no custom, complex and hard-to-find [[:Category:Tektronix-made integrated circuits|Tektronix-made custom ICs]];
# Three nice plug-ins, the [[5CT1N]] semiconductor curve tracer, the [[5L4N]] audio spectrum analyzer and the [[5S14N]] sampling system give the 5100-series power that you can't find in any of Tek's portable scopes.  The [[5S14]] increases the effective bandwidth of the system to around 1 GHz.
# Three nice plug-ins, the [[5CT1N]] semiconductor curve tracer, the [[5L4N]] audio spectrum analyzer and the [[5S14N]] sampling system give the 5100-series power that you can't find in any of Tek's portable scopes.  The [[5S14N]] increases the effective bandwidth of the system to around 1 GHz.


== Some Interesting Notes ==
== Some Interesting Notes ==
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