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{{Plugin Sidebar 2|
{{Plugin Sidebar
title=Tektronix 7B53A |
|manufacturer=Tektronix
summary=Dual Timebase |
|series=7000-series scopes
image=Tek-7b53a-front.jpg |  
|type=7B53A  
caption=Tektronix 7B53A Timebase plug-in|
|summary=100 MHz dual timebase
introduced=1973 |
|image=Tek-7b53a-front.jpg
discontinued=1992 |
|caption=Tektronix 7B53A Timebase plug-in
series=[[7000-series scopes]]|
|introduced=1973
manuals=
|discontinued=1992
* [[Media:070-1342-00.pdf | 7B53A/7B53AN Dual Time Base Instruction Manual]] (OCR, PDF)
|manuals=
* [http://bama.edebris.com/download/tek/7b53a/Tektronix_7B53A_Service_May88.pdf Tektronix 7B53A and 7B53AN Manual Revised May 1988 (PDF)]
* [[Media:070-1252-00.pdf|7B53A/7B53AN Operators Manual]] (OCR)
* [http://w140.com/smb/7b53a_an_ops_sm.pdf Tektronix 7B53A and 7B53AN Operators Manual (OCR, PDF)]
* [[Media:070-1342-00.pdf|7B53A/7B53AN Instruction Manual -00]] (OCR)
* [http://w140.com/smb/7b53a_an_svc_sm.pdf Tektronix 7B53A and 7B53AN Service Manual (OCR, PDF)]
* [[Media:070-1342-01.pdf|7B53A/7B53AN Instruction Manual -01]] (OCR)
* [http://w140.com/tek_7B53A_opt_5.pdf Tektronix 7B53A and 7B53AN Option 5 TV Sync Separator Manual (PDF)]
* [[Media:070-1471-00.pdf|7B53A/7B53AN Option 5 (TV Sync Separator) Instruction Manual Supplement]] (OCR)
* [[media:7B53A_MOD.pdf|7B53A and 7B53AN Custom Modifications Manual (PDF)]]
* [[Media:061-1570-00.pdf|7B53A and 7B53AN Mods (PDF)]]


<small>
'''Modifications'''
* [[media:7B53A MOD.pdf|7B53A and 7B53AN Custom Modifications Manual]]
* [[Media:061-1570-00.pdf|7B53A and 7B53AN Mods]]
</small>
}}
}}
The '''Tektronix 7B53A''' is a 100 MHz dual time base plug-in for [[7000-series scopes]] that was [[introduced in 1973]] and produced until the discontinuation of the 7000 series in 1992.


The '''Tektronix 7B53A''' and '''7B53AN''' is a 100 MHz dual time base plug-in for [[7000-series scopes]].
It succeeded the short-lived [[7B52]], with sweep mode selection integrated into the time/Div switch, and the older combined trigger level/polarity control replaced with separate, concentric knobs.
It is similar to the [[7B52]] which is much more rarely found.  While the 7B52 has a separate mode switch,
this is integrated into the TIME/DIV switch in the 7B53A.


The 7B53AN is electrically identical to he 7B53A but omits the circuits needed to drive the alphanumeric
The '''7B53AN''' is identical to the 7B53A but omits the circuits needed to drive the alphanumeric readout system provided in 7000-series mainframes.   
readout system provided in 7000-series mainframes.  The '''TD-1085/U''' is a military designation for the
7B53AN11 which was used in the [[AN/USM-281C]] military version of the [[7603]] scope.


There does not appear to have been a product sold called simply "7B53".  
The '''TD-1085/U''' is a military designation for the 7B53AN11 which was used in the [[AN/USM-281C]] military version of the [[7603]] scope.
There is a 7B53N, a 7B53A, and a 7B53AN.
 
The '''TD-1159/U''' is another military version of the standard 7B53A with readout support.
 
The '''7B53N''' has a nearly identical front panel layout as the [[7B52]], but omits the readout circuitry.
 
There does not appear to have been a product sold called simply "7B53". There is a 7B53N, a 7B53A, and a 7B53AN.


{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Sweep rates | 50 ns/Div to 5 s/Div in 1—2—5 sequence (5 ns with ×10 magnification)}}
{{Spec | Sweep rates     | 50 ns/Div to 5 s/Div in 1−2−5 sequence (5 ns with ×10 magnification)}}
{{Spec | Deflection | 10 mV/Div, 100 mV/Div or 1 V/Div, up to 2 MHz }}
{{Spec | Deflection     | 10 mV/Div, 100 mV/Div or 1 V/Div, up to 2 MHz }}
{{Spec | Sensitivity | 0.3 Div or 100 mV up to 10 MHz, 1.5 Div or 500 mV up to 100 MHz}}
{{Spec | Sensitivity     | 0.3 Div or 100 mV up to 10 MHz, 1.5 Div or 500 mV up to 100 MHz}}
{{Spec | Coupling   | DC, AC (> 30 Hz), AC LF REJ (> 30 kHz), AC HF REJ (30 Hz — 150 kHz) }}
{{Spec | Coupling       | DC, AC (> 30 Hz), AC LF REJ (> 30 kHz), AC HF REJ (30 Hz — 150 kHz) }}
{{Spec | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Jitter     | < 1 ns at 75 MHz }}
{{Spec | Jitter         | < 1 ns at 75 MHz }}
{{Spec | Features |
{{Spec | Features |
* Dual delayed timebase
* Dual delayed timebase
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* Option 5 for the 7B53A adds a TV Sync Separator (video trigger).
* Option 5 for the 7B53A adds a TV Sync Separator (video trigger).
* Several special custom modifications exist for the 7B53A(N):
* Several special custom modifications exist for the 7B53A(N):
** MOD FB adds a gated X-Y mode for operation with the Rotational Function Generator (RFG) for the [[Engine Analyzer]] System (7B53A only)
** MOD FB adds a gated X-Y mode for operation with the Rotational Function Generator (RFG) for the [[Engine Analyzer System]] (7B53A only)
** MOD 178H adds an alternate sweep mode, deletes mixed sweep mode
** MOD 178H adds an alternate sweep mode, deletes mixed sweep mode
** MOD 769G adds Delay Gate and Delayed Sweep Gate rear outputs
** MOD 769G adds Delay Gate and Delayed Sweep Gate rear outputs
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}}
}}
{{EndSpecs}}
{{EndSpecs}}
==Links==
{{Documents|Link=7B53A}}


==Operation==
==Operation==
===Delayed Sweep Gate output ===
When the delayed timebase trigger source switch is set to INT (pushed in) and the internal connector P613 is in the active position, the DLY'D TRIG IN connector becomes a Delayed Sweep Gate output.
This is useful e.g. to connect to a [[7D15]]'s arming inputs, or a [[7D12]]/[[M2]]'s external trigger input.  See the 1975 TekScope article linked below.
===Variable control===
===Variable control===
Through an internal jumper, the front-panel variable control (red knob) can be selected to vary either the main sweep,
Through an internal jumper, the front-panel variable control (red knob) can be selected to vary either the main sweep,
the delayed sweep or the main sweep hold-off.  
the delayed sweep or the main sweep hold-off. See the 1975 TekScope article linked below.
See i.a. [[Media:Tekscope 1975 V7 N5.pdf | TekScope Vol. 7 No. 5, 1975]] p.15+: Dave McCullough, ''Delayed gate aids oscilloscope digital measurements''.
 
===Use as Delayed Timebase ===
The 7B53A only works in "triggered after delay" mode when used as a delayed timebase, unlike e.g. the [[7B92]].


===X-Y operation===
===X-Y operation===
The 7B53 supports X-Y mode by selecting the "Ampl" position on the Time/Div switch.  
The 7B53 supports X-Y mode by selecting the "Ampl" position on the Time/Div switch.  
The X signal can be picked up from a vertical plug-in via the internal trigger path or applied via the "Main Trig In or Amp In" input,
The X signal can be picked up from a vertical plug-in via the internal trigger path, or applied via the "Main Trig In or Amp In" input, as determined by the Trigger Source switch setting.  
as determined by the Trigger Source switch setting. Sensitivity on the external input is 100 mV/Div,  
Sensitivity on the external input is 100 mV/Div, which can be increased to 10 mV/Div by selecting the ×10 magnifier, or decreased to 1 V/Div by pushing the EXT÷10 button.
which can be increased to 10 mV/DIv by selecting the x10 magnifier, or decreased to 1 V/Div by pushing the EXT÷10 button.


===Delayed Sweep Gate output ===
==Links==
When the delayed timebase trigger source switch is set to INT (pushed in) and the internal connector P613 is in the active position,
* [[Media:Tekscope 1975 V7 N5.pdf|TekScope Vol. 7 No. 5, 1975 p.15+: Dave McCullough, ''Delayed gate aids oscilloscope digital measurements'']]
the DLY'D TRIG IN connector becomes a Delayed Sweep Gate output.
* [https://www.youtube.com/watch?v=75wUU_tc-zc Tektronix 7B53A Repair and Alignment] by Zenwizard Studios @ YouTube
This is useful e.g. to connect to a [[7D15]]'s arming inputs, or a [[7D12]]/[[M2]]'s external trigger input.
 
===Use as Delayed Timebase ===
The 7B53A only works in "triggered after delay" mode when used as a delayed timebase, unlike e.g. the [[7B92]].


==Prices==
==Prices==
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|align=right| $2,500
|align=right| $2,500
|-
|-
! 2015 value
! In 2023 Dollars
|align=right| $4,520
|align=right| $5,800
|align=right| $3,840
|align=right| $4,900
|align=right| $3,250
|align=right| $4,200
|align=right| $3,440
|align=right| $4,400
|align=right| $4,520
|align=right| $5,800
|-
|-
|}
|}
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TD-1085U.jpg        | TD-1085/U, military version of 7B53AN
TD-1085U.jpg        | TD-1085/U, military version of 7B53AN
7B53A-Opt5.jpg      | 7B53A Option 5
7B53A-Opt5.jpg      | 7B53A Option 5
7B53N.png            | 7B53N
</gallery>
</gallery>
==Components==
{{Parts|7B53N}}
{{Parts|7B53A}}




[[Category:7000 series horizontal plugins]]
[[Category:7000 series horizontal plugins]]
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