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[[File:109 front crop.jpg|250px|thumb|right]]
{{Instrument Sidebar
|manufacturer=Tektronix
|model=109
|class=Pulse generator
|series=
|summary=pulse generator
|image=109 front crop.jpg
|caption=Tek 109 front
|introduced=1962
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-299.pdf|Tektronix 109 Manual]] (PDF)
* [[Media:062-0105-00.pdf|017-0067-00 Charging Network Datasheet]]
}}
The '''Tektronix Type 109''' is a pulse generator [[introduced in 1962]].  
The '''Tektronix Type 109''' is a pulse generator [[introduced in 1962]].  
It uses a [[GR-874]] 50 Ω output connector  
 
and has a specified rise time of 250 ps.  
It uses a [[GR-874]] 50 Ω output connector and has a specified rise time of 250 ps.  


{{BeginSpecs}}
{{BeginSpecs}}
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{{Spec | Pulse frequency | 550 to 720 Hz }}
{{Spec | Pulse frequency | 550 to 720 Hz }}
{{Spec | Pulse length | 0.5 ns to 100 ns with a single charge line between the two charge line connectors, or up to 300 ns at half pulse rate with one open-ended charge line (other connector grounded)}}
{{Spec | Pulse length | 0.5 ns to 100 ns with a single charge line between the two charge line connectors, or up to 300 ns at half pulse rate with one open-ended charge line (other connector grounded)}}
{{Spec | Pulse amplitude | Internal supply: 0 to 50 V variable in three ranges (0.5 V, 5 V, 50 V), positive or negative, or external up to ± 300 V}}
{{Spec | Pulse amplitude | Internal supply: 0 to 50 V variable in three ranges (0.5 V, 5 V, 50 V), positive or negative, or external up to ±300 V}}
{{EndSpecs}}
{{EndSpecs}}
==Manuals==
* [http://bama.edebris.com/download/tek/109/tek%20109.v6.pdf Tektronix 109 Manual (PDF)]


==Internals==
==Internals==
[[File:Charge line animation.gif|250px|right]]
[[File:Charge line animation.gif|250px|right]]
The 109's operating principle is that of a
The 109's operating principle is that of a [http://en.wikipedia.org/wiki/Pulse_forming_network#Transmission_line_PFNs charged transmission line pulse generator] with a mechanical reed switch and external 50 Ω transmission line/lines attached through two GR-874 50 Ω connectors.   
[http://en.wikipedia.org/wiki/Pulse_forming_network#Transmission_line_PFNs charged transmission line pulse generator]
with a mechanical reed switch and external 50 Ω transmission line/lines attached through two GR-874 50 Ω connectors.   
The length of the external cables determines the impulse width.  
The length of the external cables determines the impulse width.  
Using two transmission lines of non-equal length, alternating pulses having different width can be produced.   
Using two transmission lines of non-equal length, alternating pulses having different width can be produced.   
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* [http://cds.linear.com/docs/en/application-note/an120f.pdf Jim Williams, Linear Technology Application Note 120, "1 ppm Settling Time Measurement for a Monolithic 18-Bit DAC"] - see Appendix H (p.30)
* [http://cds.linear.com/docs/en/application-note/an120f.pdf Jim Williams, Linear Technology Application Note 120, "1 ppm Settling Time Measurement for a Monolithic 18-Bit DAC"] - see Appendix H (p.30)
* [http://w140.com/slac-tn-71-027.pdf Report comparing RG-58 with RG-174 using Tek 109 and Tek 661 (PDF)]
* [https://w140.com/slac-tn-71-027.pdf Report comparing RG-58 with RG-174 using Tek 109 and Tek 661 (PDF)]
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/109.html Tek 109 page @ amplifier.cd]
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/109.html Tek 109 page @ amplifier.cd]


==Pictures==
==Pictures==
<gallery>
<gallery>
File:109_front.jpg        | Front view
109_front.jpg        | Front view
File:109_right.jpg        | Right internal
109_right.jpg        | Right internal
File:109_left.jpg          | Left internal
109_left.jpg          | Left internal
File:109_back.jpg          | Rear view (connector not original)
109_back.jpg          | Rear view (connector not original)
File:109_impulse.jpg      | flying spot caught with 7904, S6, 7T11, 7M11. 2.5 V<sub>pk</sub>, T<sub>r</sub>=240 ps
109_impulse.jpg      | flying spot caught with 7904, S6, 7T11, 7M11. 2.5 V<sub>pk</sub>, T<sub>r</sub>=240 ps
File:Tek 109 schematic.png | schematic
Tek 109 schematic.png | schematic
File:Tek-017-067.jpg      | 017-067 Charge network for 109
Tek-017-067.jpg      | [[017-067]] Charge network for 109
File:017-067.jpg          | 017-067 Charge network for 109 (description)
017-067.jpg          | 017-067 Charge network for 109 (description)
Tek 109 front.jpg
Tek 109 front2.jpg
Tek 109 top.jpg|top
Tek 109 bottom.jpg|bottom
</gallery>
</gallery>


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[[Category:Pulse generators]]
[[Category:Pulse generators]]
[[Category:introduced in 1962]]
[[Category:introduced in 1962]]
[[Category:GR874]]

Latest revision as of 10:08, 18 August 2021

Tektronix 109
pulse generator
Tek 109 front

Produced from 1962 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix Type 109 is a pulse generator introduced in 1962.

It uses a GR-874 50 Ω output connector and has a specified rise time of 250 ps.

Key Specifications

Rise time 250 ps
Pulse frequency 550 to 720 Hz
Pulse length 0.5 ns to 100 ns with a single charge line between the two charge line connectors, or up to 300 ns at half pulse rate with one open-ended charge line (other connector grounded)
Pulse amplitude Internal supply: 0 to 50 V variable in three ranges (0.5 V, 5 V, 50 V), positive or negative, or external up to ±300 V

Internals

The 109's operating principle is that of a charged transmission line pulse generator with a mechanical reed switch and external 50 Ω transmission line/lines attached through two GR-874 50 Ω connectors. The length of the external cables determines the impulse width. Using two transmission lines of non-equal length, alternating pulses having different width can be produced. Alternatively, an R-C network can be used to create pulses with R-C decay characteristic but longer duration.

The pulse-generating switch in the 109 is a mechanical mercury switch, which limits pulse frequency to about 600 Hz. Moreover, this switch has a relatively short life time (200 hours) — if the operator forgets to shut the 109 down over the weekend and some holidays, the reed switch will need replacement.

The internal voltage source is adjustable from 0 to 50 V in three ranges (0.5 V, 5 V, 50 V), either positive or negative. Using external voltage sources, pulses up to 300 V of either polarity are possible, including alternating positive/negative pulses.

Repair issues

Be aware during servicing that the thermal breaker is on full mains and has no protection cover!

Links

Pictures

  • Front view

    Front view

  • Right internal

    Right internal

  • Left internal

    Left internal

  • Rear view (connector not original)

    Rear view (connector not original)

  • flying spot caught with 7904, S6, 7T11, 7M11. 2.5 Vpk, Tr=240 ps

    flying spot caught with 7904, S6, 7T11, 7M11. 2.5 Vpk, Tr=240 ps

  • schematic

    schematic

  • 017-067 Charge network for 109

    017-067 Charge network for 109

  • 017-067 Charge network for 109 (description)

    017-067 Charge network for 109 (description)

  • top

    top

  • bottom

    bottom

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