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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'''
* Manual needed ''please add'' 2245 service manual
* [[Media:070-6167-00.pdf|2245 Operators manual]]
* [[Media:tek_2245_2246 specs.pdf|2245/2246 Specifications]] (OCR)


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]] (OCR)
* [[Media:2252_2247A_2245A_Specs.pdf|2245A/2247A/2252 Specifications]] (OCR)


'''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).
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, and 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>
US Tektronix 2245A FrontRAW.JPG|2245A
Tek2245.jpg
Tek 2245a 4trace.jpg
Tek 2245a square trace.jpg|2245A
</gallery>
==Components==
{{Parts|2245}}
{{Parts|2245A}}


* [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)]
* [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)]




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