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==Manuals== | |||
* [http://bama.edebris.com/download/tek/109/tek%20109.v6.pdf Tektronix 109 Manual (PDF)] | |||
==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 | ||
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The pulse-generating switch in the 109 is a mechanical [[mercury switch]], which limits pulse frequency to about 600 Hz. | 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) | 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. | ||
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. | 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. | ||
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Be aware during servicing that the thermal breaker is on full mains and has no protection cover! | Be aware during servicing that the thermal breaker is on full mains and has no protection cover! | ||
== | ==Links== | ||
* [http:// | * [http://cds.linear.com/docs/en/application-note/an120f.pdf Jim Williams, Linear Technology Application Note 120, "1ppm 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)] | * [http://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] | |||
==Pictures== | ==Pictures== | ||
Revision as of 09:57, 13 January 2015
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 |
Manuals
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.
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 an external voltage source, pulses up to 300 V are possible.
Repair issues
Be aware during servicing that the thermal breaker is on full mains and has no protection cover!
Links
- Jim Williams, Linear Technology Application Note 120, "1ppm Settling Time Measurement for a Monolithic 18-Bit DAC" - see Appendix H (p.30)
- Report comparing RG-58 with RG-174 using Tek 109 and Tek 661 (PDF)
- Tek 109 page @ amplifier.cd
Pictures
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Front view
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Right internal
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Left internal
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Rear view Connector not original
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flying spot caught with 7904, S6, 7T11, 7M11. 2.5 Vpk, Tr=240 ps
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schematic
