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561: Difference between revisions
Added some information about the mod210C
(Bob Shand did the mechanical design on 560B series (see Tekscope May 1972)) |
(Added some information about the mod210C) |
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* [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions (PDF)]] | * [[Media:Tektronix561_NO040288FieldModification.pdf | Tektronix 561 #040-288 Field Modification Instructions (PDF)]] | ||
* [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions (PDF)]] | * [[Media:Tektronix561_NO040347FieldModification.pdf | Tektronix 561 #040-347 Field Modification Instructions (PDF)]] | ||
* [[Media:Tek_561A_mod210C.pdf|Tektronix 561A Mod 210C]] | |||
* [[Media:Tek 561b mod 272c.pdf|Tektronix 561B Mod 272C]] | * [[Media:Tek 561b mod 272c.pdf|Tektronix 561B Mod 272C]] | ||
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The original 561 and RM561 were introduced in 1961. | The original 561 and RM561 were introduced in 1961. | ||
Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | ||
It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of | It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. Some later plugins intended for use with the 561A or 561B have higher power requirements and may not be compatible with the 561. | ||
The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe. | The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe. | ||
The 561 calibrator has 18 attenuation steps and can output a square wave with an amplitude of | The 561 calibrator has 18 attenuation steps and can output a square wave with an amplitude of 200 μV to 100 V. | ||
Early serial numbers of the 561 use a neon bulb (B633) in the - | Early serial numbers of the 561 use a neon bulb (B633) in the -100 V regulator circuit, however, later versions (including the 561A and later) used a transistor. | ||
The modification for early units is documented at the end of the 561 manual and in the 040-288 Field Modification Instructions. | The modification for early units is documented at the end of the 561 manual and in the 040-288 Field Modification Instructions. | ||
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An RM561A with two custom plug-ins was incorporated (upside-down) as the standard display in the [http://en.wikipedia.org/wiki/LINC LINC] computer. | An RM561A with two custom plug-ins was incorporated (upside-down) as the standard display in the [http://en.wikipedia.org/wiki/LINC LINC] computer. | ||
The Mod210C replaced the T5610 ceramic CRT with the T5032 glass CRT and an external graticule. The graticule illumination was changed to red and the BNC connectors of the scope and plugins were replaced with UHF connectors.The graticule has an engraved sinewave. A green light filter was added between the CRT and the graticule. The 3A1 plugin got an additional trigger input. | |||
===561B=== | ===561B=== | ||
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===561S=== | ===561S=== | ||
A special 561S was introduced as a special product, modified from a 561A. It did not appear in any Tek catalog. | A special 561S was introduced as a special product, modified from a 561A. It did not appear in any Tek catalog. | ||
With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), and a special CRT ([[T5033]]), it achieved a | With special modified amplifier and time base ([[3A1S]] and [[3B1S]]), and a special CRT ([[T5033]]), it achieved a 25 MHz system bandwidth, which is 2.5 times the bandwidth of a 561A. | ||
The 3A1S and 3B1S were the only plug-ins that could be used in the 561S because the T5033 CRT has higher deflection sensitivity than the CRT used in the 561, 561A, and 561B. | The 3A1S and 3B1S were the only plug-ins that could be used in the 561S because the T5033 CRT has higher deflection sensitivity than the CRT used in the 561, 561A, and 561B. | ||
The vertical deflection sensitivity of the T5033 is 11. | The vertical deflection sensitivity of the T5033 is 11.7 V/cm. The 561A has the [[T561]] CRT which has a vertical deflection sensitivity of 19.5 V/cm. | ||
The higher bandwidth of the 561S came at the expense of trading off some of the advances gained in the original 561A. | The higher bandwidth of the 561S came at the expense of trading off some of the advances gained in the original 561A. | ||
The CRT is a conventional glass envelope, without internal graticule. | The CRT is a conventional glass envelope, without internal graticule. | ||
Also, the scale was reduced from 8 × 10 divisions to 6 × 10. The 561S has no post-deflection acceleration, and a CRT cathode voltage of -3, | Also, the scale was reduced from 8 × 10 divisions to 6 × 10. The 561S has no post-deflection acceleration, and a CRT cathode voltage of -3,300 V, like the other 561 models. | ||
===Plugin Compatibility=== | ===Plugin Compatibility=== | ||
The popular 60 and 70 series plug-ins were later given a “2A, 2B, 3A, or 3B” prefix. | The popular 60 and 70 series plug-ins were later given a “2A, 2B, 3A, or 3B” prefix. | ||
The highest bandwidth plug-ins gave a system bandwidth of | The highest bandwidth plug-ins gave a system bandwidth of 10 MHz when used in the 561A and 561B. | ||
The 561A, RM561A, 561B, and RM561B are compatible with all of the 2 and 3-series plugins that Tektronix made. | The 561A, RM561A, 561B, and RM561B are compatible with all of the 2 and 3-series plugins that Tektronix made. | ||
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For plugins such as the 3B1 and 3B3 time bases there are issues with the blanking and intensified sweep. | For plugins such as the 3B1 and 3B3 time bases there are issues with the blanking and intensified sweep. | ||
The 561A and subsequent models used a dual-secondary winding transformer in the CRT power supply, with one winding used in an intensifying pulse circuit which the original 561 lacked. | The 561A and subsequent models used a dual-secondary winding transformer in the CRT power supply, with one winding used in an intensifying pulse circuit which the original 561 lacked. | ||
Other 3-series plugins may be used in the original 561 with some modifications – for example, to use a 3A74 4-channel vertical plugin in a 561 sn101to579, the + | Other 3-series plugins may be used in the original 561 with some modifications – for example, to use a 3A74 4-channel vertical plugin in a 561 sn101to579, the +6 V unregulated supply needs to be disconnected from both plugin connectors (pin 18). | ||
Later 561's with sn580 and higher already had this change implemented. More information regarding the use of 3-series plugins and the required modifications (if available) can be found in the Tektronix 561 Instrument Reference Book (IRB). | Later 561's with sn580 and higher already had this change implemented. More information regarding the use of 3-series plugins and the required modifications (if available) can be found in the Tektronix 561 Instrument Reference Book (IRB). | ||
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{{Spec | Bandwidth | DC to 4 MHz (with [[3A75]], may vary with other plug-ins) }} | {{Spec | Bandwidth | DC to 4 MHz (with [[3A75]], may vary with other plug-ins) }} | ||
{{Spec | Rise time | 0.09 μs }} | {{Spec | Rise time | 0.09 μs }} | ||
{{Spec | Power Consumption | | {{Spec | Power Consumption | 185 W with [[72]] & [[67]] plug-ins}} | ||
{{SpecGroup | 561A & 561B }} | {{SpecGroup | 561A & 561B }} | ||
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{{Spec | Rise time | 0.024 μs }} | {{Spec | Rise time | 0.024 μs }} | ||
{{Spec | Power Consumption | | {{Spec | Power Consumption | 178 W with plug-ins }} | ||
{{SpecGroup | 561S }} | {{SpecGroup | 561S }} | ||
{{Spec | Bandwidth | DC to 25 MHz (with [[3A1S]], may vary with other plug-ins) }} | {{Spec | Bandwidth | DC to 25 MHz (with [[3A1S]], may vary with other plug-ins) }} | ||
{{Spec | Rise time | 0.014 μs }} | {{Spec | Rise time | 0.014 μs }} | ||
{{Spec | Power Consumption | | {{Spec | Power Consumption | 210 W to 240 W with plug-ins }} | ||
{{SpecGroup | all}} | {{SpecGroup | all}} | ||
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{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }} | {{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }} | ||
{{Spec | Anode Potential | 3.5 kV}} | {{Spec | Anode Potential | 3.5 kV}} | ||
{{Spec | Screen Area | 8 cm × 10 cm ( 561S: | {{Spec | Screen Area | 8 cm × 10 cm ( 561S: 6 cm x 10 cm ) }} | ||
{{Spec | Construction | Aluminum alloy chassis. Anodized front panel}} | {{Spec | Construction | Aluminum alloy chassis. Anodized front panel}} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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Tek 561a lvps schem.png|561A Low Voltage Power Supply | Tek 561a lvps schem.png|561A Low Voltage Power Supply | ||
Tek 561a crt schem.png|561A CRT Circuit | Tek 561a crt schem.png|561A CRT Circuit | ||
Tek_561A_MOD210C_01.jpg|561A with Mod210C power off | |||
Tek_561A_MOD210C_02.jpg|561A with Mod210C Graticule at 100% & showing signal | |||
Tek_561A_MOD210C_04.jpg|561A with Mod210C Graticule at night | |||
Tek_561A_MOD210C_03.jpg|561A with Mod210C comparing sinewave signal to the engraved signal | |||
</gallery> | </gallery> | ||