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The Tektronix 2245 is a 100 MHz four channel* analog oscilloscope. It is part of a nearly identical family consisting of the 2245, [[2246]], [[2247]], and [[2252]]. It's the base model of the family.
{{Oscilloscope Sidebar
|manufacturer=Tektronix  
|series=2000-series scopes
|model=2245  
|summary=100 MHz portable 4-channel scope
|image=Tek2245.jpg
|caption=Tektronix 2245A
|introduced=1987
|discontinued=1995
|designers=
|manuals=
'''2245'''
* [[Media:070-6276-00.pdf        | 2245 Service, April 1987 Edition ]]
* [[Media:070-6167-00.pdf        | 2245 Operators manual            ]]
* [[Media:tek_2245_2246 specs.pdf | 2245/2246 Specifications        ]]


Two channels are fully-functioned, and two are very limited, in both deflection factor and coupling.  
'''2245A'''
* [[Media:070-6558-01.pdf            | 2245A Operators manual          ]]
* [[Media:070-6557-00.pdf            | 2245A Service Manual 070-6557-00 ]] (124MB)
* [[Media:070-7672-00.pdf            | 2245A Service Manual 070-7672-00, SN B016000-up ]]
* [[Media:2252_2247A_2245A_Specs.pdf | 2245A/2247A/2252 Specifications ]]


'''alternate copies'''
* [https://www.ko4bb.com/manuals/download.php?file=Tektronix/Tektronix_-_2245A/Tektronix_2245_2246_Specification.pdf          Tektronix 2245/2246 Specifications ]
* [https://www.ko4bb.com/manuals/download.php?file=Tektronix/Tektronix_-_2245A/Tektronix_2245A_Oscilloscope_Service_Manual.pdf Tektronix 2245A Service Manual    ]
* [https://www.ko4bb.com/manuals/download.php?file=Tektronix/Tektronix_-_2245A/Tektronix_2245A_2247A_OPT15.pdf                Tektronix 2245A Option 15 Manual  ]
{{ROM Images}}
'''2245A'''
* A16U2408 [[Media:160-5391-00.bin|160-5391-00]]
* A16U2519 [[Media:160-5063-09.bin|160-5063-09]] / [[Media:160-5063-04.bin|160-5063-04]] / [[Media:160-6500-02.bin|160-6500-02]], [[Media:160-6500-00.bin|160-6500-00]]
* A16U2400 [[Media:160-3493-00.bin|160-3493-00]] SC84477P PDIP28 (68HC705?)
}}
The '''Tektronix 2245''' is a 100 MHz four-channel analog oscilloscope, introduced in 1987 (2245A in 1988).


* [http://www.ko4bb.com/Manuals/09%29_Misc_Test_Equipment/1%29_Brochures_and_Datasheets/TEK%202252,2247A,2245A%20SPECS.PDF Tektronix 2245A/2247A/2252 Specifications (PDF)]
Channels 1 and 2 are full-featured, whereas 3 and 4 are limited in both deflection factor and coupling, as they are intended mainly for digital and trigger signals.
* [http://www.ko4bb.com/Manuals/Tektronix/Tektronix_-_2245A/Tektronix_2245_2246_Specification.pdf Tektronix 2245/2246 Specifications (PDF)]
* [http://www-3.unipv.it/lde/strumentazione_strum_banco/oscilloscopio.pdf Tektronix 2245A Operators Manual (PDF)]
* [http://www.ko4bb.com/Manuals/Tektronix/Tektronix_-_2245A/Tektronix_2245A_Oscilloscope_Service_Manual.pdf Tektronix 2245A Service Manual (PDF)]
* [http://www.ko4bb.com/Manuals/Tektronix/Tektronix_-_2245A/Tektronix_2245A_2247A_OPT15.pdf Tektronix 2245A Option 15 Manual (PDF)]


The 2245 includes features like AUTO SETUP which automatically adjusts vertical, horizontal, triggering and display controls to provide a stable, triggered display of the waveform in seconds. It offers a dual time base with delayed sweep, and cursor time/voltage measurements with on-screen readout of cursor data and scale factors.
{{BeginSpecs}}
{{Spec | Bandwidth | 100 MHz }}
{{Spec | Deflection| CH 1, CH 2: 2 mV/div to 5 V/div in 1-2-5 seq; CH 3, CH 4: 0.1 V/div and 0.5 V/div, all ±2%; BW limit: 20 MHz ±15%  }}
{{Spec | Vertical modes | CH1,2,3,4, CH2 Invert, Add, Alt, Chop (625 kHz) }}
{{Spec | Input impedance | 1 MΩ ±1.0% // 20 pF ±1 pF }}
{{Spec | Maximum input | 400 V DC + peak AC, or 800 V<sub>p-p</sub> at ≤ 10 kHz) }}
{{Spec | Sweep | A Time Base: 0.5 s/div to 20 ns/div in 1-2-5 seq; B Time Base: 5 ms/div to 20 ns/div in 1-2-5 seq (×10 magnifier to 2 ns/div) }}
{{Spec | Trigger| DC, Noise Reject, HF Reject, LF Reject, AC, TV Line, TV Field }}
{{Spec | Trigger modes| A Mode: Auto Level, Auto, Norm, TV Line, TV Field, Single Seq. B Mode: Runs After Delay, Auto Level, Norm, TV Line (From A Source) }}
{{Spec | Cursors| Time, Volts }}
{{Spec | Interface| Ext Counter/Timer Base Input connector; Ext Z-Axis Input connector }}
{{Spec | CRT | Acceleration 16.4 (−2.7/+13.7) kV }}
{{Spec | Probes| Two [[P6109]] 100 MHz ×10 probes, [[BNC connector]] with a [[readout pin]] }}
{{Spec | Power| 90 − 250 V<sub>AC</sub>, 48 − 445 Hz; 100 W max. }}
{{EndSpecs}}
==Repair Information==
* [[224x PSU Repairs | 2245 Power Supply Repair Information ]]
==Links==
[https://groups.io/g/TekScopes/topic/7646896 Backup Battery in Tek 2245A ]
==Pictures==
<gallery>
Tek2245.jpg                    | 2245
US Tektronix 2245A FrontRAW.JPG | 2245A
Tek 2245a 4trace.jpg            | 2245A
Tek 2245a square trace.jpg      | 2245A
</gallery>
==Components==
{{Parts|2245}}
{{Parts|2245A}}


[[Category:2246 series scopes]]
[[Category:Image needed]]
[[Category:Specifications needed]]




[[Category:Introduced in 1987]]
[[Category:2246 series scopes]]

Latest revision as of 09:16, 5 June 2024

Tektronix 2245
100 MHz portable 4-channel scope
Tektronix 2245A

Produced from 1987 to 1995

Manuals
ROM Images
File Pos. Checksum

2245A

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

The Tektronix 2245 is a 100 MHz four-channel analog oscilloscope, introduced in 1987 (2245A in 1988).

Channels 1 and 2 are full-featured, whereas 3 and 4 are limited in both deflection factor and coupling, as they are intended mainly for digital and trigger signals.

The 2245 includes features like AUTO SETUP which automatically adjusts vertical, horizontal, triggering and display controls to provide a stable, triggered display of the waveform in seconds. It offers a dual time base with delayed sweep, and cursor time/voltage measurements with on-screen readout of cursor data and scale factors.

Key Specifications

Bandwidth 100 MHz
Deflection CH 1, CH 2: 2 mV/div to 5 V/div in 1-2-5 seq; CH 3, CH 4: 0.1 V/div and 0.5 V/div, all ±2%; BW limit: 20 MHz ±15%
Vertical modes CH1,2,3,4, CH2 Invert, Add, Alt, Chop (625 kHz)
Input impedance 1 MΩ ±1.0% // 20 pF ±1 pF
Maximum input  400 V DC + peak AC, or 800 Vp-p at ≤ 10 kHz)
Sweep A Time Base: 0.5 s/div to 20 ns/div in 1-2-5 seq; B Time Base: 5 ms/div to 20 ns/div in 1-2-5 seq (×10 magnifier to 2 ns/div)
Trigger DC, Noise Reject, HF Reject, LF Reject, AC, TV Line, TV Field
Trigger modes A Mode: Auto Level, Auto, Norm, TV Line, TV Field, Single Seq. B Mode: Runs After Delay, Auto Level, Norm, TV Line (From A Source)
Cursors Time, Volts
Interface Ext Counter/Timer Base Input connector; Ext Z-Axis Input connector
CRT Acceleration 16.4 (−2.7/+13.7) kV
Probes Two P6109 100 MHz ×10 probes, BNC connector with a readout pin
Power 90 − 250 VAC, 48 − 445 Hz; 100 W max.

Repair Information

Links

Backup Battery in Tek 2245A

Pictures

  • 2245

    2245

  • 2245A

    2245A

  • 2245A

    2245A

  • 2245A

    2245A

Components

Some Parts Used in the 2245

Part Part Number(s) Class Description Used in
M377 165-2129-03 • 165-2089-06 • 155-2089-05 Monolithic integrated circuit amplifier 11A16 • 11A32 • 11A33 • 11A34 • 11A52 • 2245 • 2245A • 2247 • 2247A • 2252 • TDS410 • TDS420 • TDS460 • TDS520D • TDS540D • TDS580D • TDS680C • TDS684C • TDS714L • TDS724D • TDS754D • TDS784D


Some Parts Used in the 2245A

Part Part Number(s) Class Description Used in
155-0322-00 155-0322-00 Monolithic integrated circuit vertical output amplifier 2245A • 2246
156-2654-00 156-2654-00 Monolithic integrated circuit ECL "fast logic" 2245A • 2246
156-2655-00 156-2655-00 Monolithic integrated circuit "slow logic" 2245A • 2246
165-2232-01 165-2232-01 Hybrid integrated circuit buffer amplifier 2245A
234-0203-20 234-0133-20 • 234-0203-20 • 234-0238-20 Monolithic integrated circuit amplifier 2245A • 2246
234-0401-20 234-0401-20 • 234-0401-21 Monolithic integrated circuit horizontal preamplifier 2245A • 2246
Intel 8086 Monolithic integrated circuit 16-bit microprocessor 1240 • 2220 • 2221 • 2230 • 2246 • 2232 • 2245A • 2782 • 4114 • 4115
M376-004 234-0204-20 • 234-0239-30 • 234-0239-31 Monolithic integrated circuit trigger 2245A • 2246
M377 165-2129-03 • 165-2089-06 • 155-2089-05 Monolithic integrated circuit amplifier 11A16 • 11A32 • 11A33 • 11A34 • 11A52 • 2245 • 2245A • 2247 • 2247A • 2252 • TDS410 • TDS420 • TDS460 • TDS520D • TDS540D • TDS580D • TDS680C • TDS684C • TDS714L • TDS724D • TDS754D • TDS784D
T4656 154-0905-00 CRT CRT 2245A • 2246 • 2246A • 2247A
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