647: Difference between revisions

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These plug-ins are unique to the 647 and 647A.   
These plug-ins are unique to the 647 and 647A.   


==Specifications==
{{BeginSpecs}}
[[Category:Specifications needed]]''please add''
{{SpecGroup | 647}}
{{Spec | Bandwidth | DC to 60 MHz (≤ 3 dB) with [[10A2|Type 10A2 plug-in]]  }}
{{Spec | Rise time | 5.8 ns }}
{{SpecGroup | 647A}}
{{Spec | Bandwidth | DC to 100 MHz (≤ 3 dB) with [[10A2A|Type 10A2A plug-in]] }}
{{Spec | Rise time | 3.5 ns }}
{{SpecGroup | all}}
{{Spec | Line Voltage | 108/115/122/216/235/244 V<sub>AC</sub> ±10%,selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz. }}
{{Spec | Thermal Protection | Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level }}
{{Spec | Power Consumption | 185W with [[10A2]] & [[11B2]]  plug-in }}
{{Spec | Cooling (only Rack-Variant)  | AC Fan }}
{{Spec | Accelerating Potential | 14 kV}}
{{Spec | Screen Area | 6 cm × 10 cm}}
{{Spec | Operating Temperature  | -30 C° to +65 C°}}
{{Spec | Construction  | Aluminum alloy chassis. Anodized front panel}}
{{Spec | Weight| 40.5 lbs / 18.4 kg }}
 
{{EndSpecs}}


==Internals==
==Internals==
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Its specified tolerance is ±1 Hz.
Its specified tolerance is ±1 Hz.


==Pictures==
==Pictures of 647==
<gallery>
<gallery>
Tek 647 10a1 11b2.jpg|647 with [[10A1]] and [[11B2]]
Tek 647 10a1 11b2.jpg|647 with [[10A1]] and [[11B2]]
Tek 647 right.jpg|647 right side
Tek 647 right.jpg|647 right side
647 MOD165K.JPG |647 with MOD165K
</gallery>
==Pictures of 647A==
<gallery>
647a_1.jpg|647A front view
647a_1.jpg|647A front view
647a_2.jpg|647A left view
647a_2.jpg|647A left view
647a_4.jpg|647A right view
647a_4.jpg|647A right view
647a_3.jpg|647A rear view
647a_3.jpg|647A rear view
Tek r647a.jpg|R647A front view
 
RM647_1.JPG|RM647 front view
Tek rm647.jpg|RM647
Tek r647a inside.jpg|RM647 inside view
Sideways r647a.jpg|Special R647A for US Air Force
Sideways r647a rear.jpg|Rear panel of the Air Force R647A
Tek 647a front.jpg|647A with [[10A1]] and [[11B2|11B2A]]
Tek 647a front.jpg|647A with [[10A1]] and [[11B2|11B2A]]
Tek 647a left.jpg|647A
Tek 647a left.jpg|647A
Line 99: Line 118:
</gallery>
</gallery>


==Pictures of RM647==
<gallery>
RM647_1.JPG|RM647 front view
Tek rm647.jpg|RM647
</gallery>
==Pictures of R647A==
<gallery>
Tek r647a.jpg|R647A front view
Tek r647a inside.jpg|RM647 inside view
Sideways r647a.jpg|Special R647A for US Air Force
Sideways r647a rear.jpg|Rear panel of the Air Force R647A
</gallery>


[[Category:Introduced in 1963]]
[[Category:Introduced in 1963]]
[[Category:647 series scopes]]
[[Category:647 series scopes]]

Revision as of 01:53, 25 November 2018

{{{manufacturer}}} 
50 MHz scope
647A front view

Produced from 1963 to 1967

Manuals
Manuals – Specifications – Links – Pictures


The Tektronix 647 is a 50 MHz oscilloscope with plug-ins for both vertical and horizontal deflection. It was introduced in late 1963, along with a minimal set of plug-ins, and replaced by the higher bandwidth 647A in 1967. Except for the CRT and the rectifiers in the HV power supply, the 647 is all solid state.

The intent was to offer a higher performance scope in a small form factor, roughly the size and weight of the 560 series. Additionally, the 647 was promoted as “ruggedized” with an extended operating temperature range, and higher shock and vibration ratings than previous lab grade instruments.

The 647 uses 10 series vertical and 11 series time base plug-ins. At introduction, the 10A2 a dual channel 50 MHz vertical, 11B1 single time base, and 11B2 dual time base were offered. These plug-ins are unique to the 647 and 647A.

Key Specifications

     — 647
Bandwidth DC to 60 MHz (≤ 3 dB) with Type 10A2 plug-in
Rise time 5.8 ns
     — 647A
Bandwidth DC to 100 MHz (≤ 3 dB) with Type 10A2A plug-in
Rise time 3.5 ns
     — all
Line Voltage 108/115/122/216/235/244 VAC ±10%,selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz.
Thermal Protection Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level
Power Consumption 185W with 10A2 & 11B2 plug-in
Cooling (only Rack-Variant) AC Fan
Accelerating Potential 14 kV
Screen Area 6 cm × 10 cm
Operating Temperature -30 C° to +65 C°
Construction Aluminum alloy chassis. Anodized front panel
Weight 40.5 lbs / 18.4 kg

Internals

Unlike the threaded knob used for retaining the 530/540 series plug-ins, the 647 uses a lever actuated cam mechanism. The single lever both engages and disengages the plug-in with a quick, smooth motion. Many users considered it to be the best plug-in retaining system Tek had ever offered.

Unlike the 560 series where the plug-ins directly drive the CRT deflection plates, the 647 has amplifiers for both the vertical and horizontal signals in the mainframe. In addition to supporting the higher bandwidth, the amplifiers provide a normalized gain at the plug-in interface, eliminating the need to adjust the gain or sweep cal every time a plug-in was swapped.

The 647 has a 140 ns delay line between the vertical plug-in connector and the input of the vertical amplifier. The interface between the vertical plug-in and the mainframe is a 93 Ω controlled-impedance connection. This is in contrast to the 500-series scopes, which appear to the plug-in as a high impedance.

The horizontal and vertical plug-ins are not electrically interchangeable. Only a 10 series plug-in will work in the vertical compartment, and only a 11 series time base will work in the horizontal compartment. X-Y mode requires the use of the external horizontal input in an 11 series time base.

The 647 uses the T6470 CRT with electromagnetic trace rotation and 14 kV total accelerating voltage. The HV power supply contains five 5642 rectifier tubes: three for the +11.2 kV CRT anode supply, one for the -2.2 kV CRT cathode, and one for the -2.2 kV CRT grid/blanking.

The calibrator in the 647 is based on a 4 kHz crystal, which is divided down to 1 kHz. Its specified tolerance is ±1 Hz.

Pictures of 647

Pictures of 647A

Pictures of RM647

Pictures of R647A