Shaun Merrigan's Information Pages


Tag: Tektronix


Tektronix TM500 Power Frame Tester

Posted by Shaun Merrigan in Electronics, Test Equipment. Comments Off on Tektronix TM500 Power Frame Tester

25th June

The Tektronix TM50n is an “n”bay (where n = 1 to 6, the number of bays) power frame which can host and power TM500 plug-ins. It was available in 1 through 6 bay versions and was the predecessor to the TM5000 power frame: See my post here about the TM5000 power frames. Tektronix themselves had dozens of plug-ins available which comprised power supplies, signal generators, oscilloscopes, multimeters, test oscillators, calibrators, attenuators, filters, logic analyzers, frequency counters, audio analyzers and more. It is important to note that while TM500 plug-ins can be used in the TM5000 power frame, the inverse is not true: TM5000 plug-ins cannot be used in a TM500 power frame.

Part of the repair/refresh process of any TM500 power frame requires the use of a Power Module Tester which (in conjunction with some basic test equipment … Read More »



Tektronix Type 106 Square Wave Generator Refresh

Posted by Shaun Merrigan in Electronics, Restoration, Tech, Test Equipment. Comments Off on Tektronix Type 106 Square Wave Generator Refresh

20th June

Introduced in 1966, the Tektronix 106 Square Wave Generator is a signal generator which can produce fast rise (<1nS @50 ohm loads positive or negative going) or high amplitude (120 Volts, high impedance load) square waves from 10Hz to 1MHz. It is used for oscilloscope calibration, risetime testing and for triggering extremely fast rise (<100pS) tunnel diode pulsers. The 106 uses a combination of vacuum tube and discrete solid-state technology. This is the sort of equipment that was used for development and testing during the NASA Apollo Program through the 1960’s.

The cost of the Tektronix Type 106 was USD 590 in 1966 or about USD 4900 in 2021 dollars. I was fortunate enough to obtain one of these units in decent condition and I was able to restore it to better than factory specification. What … Read More »


Tektronix TM5006 Power Frame Refresh

Posted by Shaun Merrigan in Electronics, Restoration, Tech, Test Equipment. Comments Off on Tektronix TM5006 Power Frame Refresh

17th June

The Tektronix TM5006 is a 6-Bay power frame which can host and power either TM5000 or TM500 plug-ins .

Tektronix themselves had about 130 different plug-ins available which comprised power supplies, signal generators, oscilloscopes, multimeters, test oscillators, calibrators, attenuators, filters, logic analyzers, frequency counters, audio analyzers and more. In addition, numerous third parties made plug-ins for the system. The total number of different plug-ins numbered at least 200. The system was introduced in 1972 and was available in some form through at least 1995. The system is remarkably interesting from a technology standpoint because it encompasses the move from discrete transistor circuitry in early equipment, evolving through microprocessor-controlled units in later equipment. The more modern TM5000 equipment also had network interface (GPIB) capability for control and data acquisition.

In terms of cost, a basic … Read More »


Tektronix Type 114 Pulse Generator Repair

Posted by Shaun Merrigan in Electronics, Restoration, Tech, Test Equipment. Comments Off on Tektronix Type 114 Pulse Generator Repair

22nd May

I recently completed repairing/refreshing and calibrating two Tektronix Type 114 Pulse Generators. This is a solid state pulse generator with variable pulse width (100ns – 10ms) and period (1us to 100mS). It can produce pulses of both polarities (-10v to +10v into 50 ohms). It was introduced in 1965. The two examples I obtained were SN 001791 and SN 003460. Initally, both units were produced output, but the waveforms were distorted (rounded square waves) and far out of specification in terms of period, pulse width, and risetime.

Tektronix Type 114 SN 003460 Front Panel

Tektronix Type 114 SN 003460 Overview

Tektronix Type 114 Pulse Generator SN 001791 Front Panel

Visual inspection also revealed damaged components and mechanical damage. A summary of the issues found follows:

Pulse width and period were out of specificationNegative pulses and square waves were … Read More »



Tektronix CG5001/CG5011 Pulse Rise Time Measurement

Posted by Shaun Merrigan in Electronics, Oscilloscopes, Test Equipment. Comments Off on Tektronix CG5001/CG5011 Pulse Rise Time Measurement

25th September

Tektronix CG5001/CG5011 Pulse Rise Time Measurement

I wanted to measure the rise time of the normal and fast edge pulses in a new acquired Tektronix CG5011 calibration generator.  The equipment line is as follows:

Tektronix TM5006 mainframe

Tektronix CG5011 Calibration Generator

Tektronix CG5001 Calibration Generator

Tektronix/Tegam 015-0611-01 Pulse Head

HP 83480A Communications Analyzer

HP 83483A Electrical Sampling Module (20GHz)

Background:  The original 015-0311-00/01 pulse head was used in combination with the CG551AP and CG5001 calibration generators. The 015-0611-00/01 pulse head is the later version  used on the CG5010 and CG5011 calibration generators.   The primary differences between the later 0611 and earlier 0311 are:

The 0611 has faster edge rise time of <150 ps or < 160 ps for the Tegam version
The 0311 has slower edge rise time  of <200 ps
The 0611 is larger (taller) than the 0311
The 0611 made by Tegam has an SMA output connector
The 611 made by … Read More »


Tektronix DSA602A Digitizing Signal Analyzer

Posted by Shaun Merrigan in Electronics, Oscilloscopes. Comments Off on Tektronix DSA602A Digitizing Signal Analyzer

14th August

Tektronix DSA602A Digitizing Signal Analyzer Part 1

I recently had the opportunity to purchase one of these units, and I am thoroughly enjoying the process of  checking its operation and getting to know how to use it.  This unit is a laboratory grade, very accurate digitizing oscilloscope from about 1990.  From the Tek Wiki entry:

Inputs
3 amplifier bays, up to 12 channels (using 11A34 plug-ins)

Resolution
8 bits; averaging of N acquisitions increases by log2(N) up to 14 bits

Display resolution
50 pixels/Div

Sample rate
DSA601, max 1 GS/s; DSA602, max 2 GS/s (one channel, left plugin)

Record length
512 to 32768 samples

Sweep rate
50 ps/Div  to 100 s/Div

ENOB
7.2 bit up to 10 MHz, 6.3 bit @ 250 MHz, 5.7 bit @ 500 MHz, 4.5 bit @ 1 GHz

Screen
magnetic deflection color computer monitor, 10″ diagonal (130 mm × 168 mm), 552×704 pixels, 22×11 infrared touch-screen grid

Power
90-132 V or 180-250 V, 48-72 Hz, 465 W (DSA601A) / 585 W (DSA602A)

Features

Automated signal measurements (rise, fall, period, frequency, width, delay, phase, duty … Read More »


Tektronix Scope-Mobile Cart Repair Part 1

Posted by Shaun Merrigan in Electronics, Oscilloscopes. Comments Off on Tektronix Scope-Mobile Cart Repair Part 1

6th January

Tektronix Scope-Mobile Cart Repair Part 1

I was lucky enough to obtain a Tektronix 202-2 Scope-Mobile Cart.

Tektronix 202-2 Scope-Mobile scanned overview image

 

Upon examining it, I found that the scope tray was loose and the tilt mechanism did not function properly.  The cause for this was broken trunnion mounts on both sides of the cart as follows:

Tektronix 202-2 Mobile Cart Chassis Parts

 

Trunnion Mount and Broken Bosses Overview

 

Trunnion Mount and Broken Bosses Overview

Three of the four bosses were fractured with the fracture surface indicating tensile overload.  I suspect that the bolts were overtightened and the bosses fractured. Overtightening loaded the bosses in tension by trying to compress the box frame member.  Unfortunately this type of polymer (some type of hard thermoplastic) is not good in tension.

Other mobile carts I have seen use cast aluminum for … Read More »


Tektronix 556 Dual Beam Oscilloscope

Posted by Shaun Merrigan in Electronics, Oscilloscopes, Tektronix 556. Comments Off on Tektronix 556 Dual Beam Oscilloscope

5th December

Tektronix 556 Dual Beam Oscilloscope

I had recently the unique opportunity to acquire a complete Tektronix 556 Oscilloscope setup.  This comprised the oscilloscope itself, the matching scope cart, original manual, probes and 12 plug-in units.  This in itself is rare enough, but in addition, this particular scope has the optically desirable blue phosphor CRT and Tektronix C-27 Camera Bezel.   This 50 MHz bandwidth oscilloscope was the state of the art when it was introduced in the mid 1960’s: Tekwiki Tek 556

This will be the first of many posts and updates as I work my way through checking and restoring this beautiful scope.

And now some images:

Tektronix 556 Oscilloscope

Tektronix 556 Oscilloscope

Tektronix 556 Oscilloscope

Tektronix 556 Oscilloscope

Tektronix 556 Oscilloscope

Thanks!

 

Shaun Merrigan

 

 


Tektronix 7904 Oscilloscope

Posted by Shaun Merrigan in Electronics, Oscilloscopes. Comments Off on Tektronix 7904 Oscilloscope

30th October

Tektronix 7904 Oscilloscope

Here are some images of one 7904 mainframe  with a 7A24 vertical module and a 7B92A horizontal module.  The scope screen shows the pulse from an S52 pulse head; the rise time is about 850ps which translates into a bandwidth of about 412 MHz.  Since the 7A24 plug-in is specified at 400 MHz, this is about right.

 

Very fast rise time pulse on a Tektronix 7904 with a 7A24 vertical module

 

This is the same pulse from an S52 pulse head but using an S4 sampling head instead of the 7A24 vertical amplifier

Very fast rise time pulse on a Tektronix 7904 with an S4 sampling head

 

Shaun Merrigan


Tektronix 7000 Series Equipment

Posted by Shaun Merrigan in Electronics, Oscilloscopes, Time and Frequency. Comments Off on Tektronix 7000 Series Equipment

25th October

Tektronix 7000 Series Equipment

I am doing some testing on recently acquired Tektronix 7000 series equipment.  Involved in these images is a Tektronix 7904A mainframe using a 7S12 TDR/Sampler plug in with an S52 pulse generator and S4 sampling head.

Tektronix 7904A Fast Rise Time Pulse

Tektronix 7904A Fast Rise Time Pulse

The rise time on of the pulse is about 32ps which translates to a bandwidth of about 11 GHz; all this for a few hundred dollars.

Shaun Merrigan