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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
* [http://bama.edebris.com/download/tek/7b53a/Tektronix_7B53A_Service_May88.pdf Tektronix 7B53A Manual (PDF)]
|manuals=
* [http://w140.com/smb/7b53a_an_ops_sm.pdf Tektronix 7B53 Operations Manual (OCR, PDF)]
* [[Media:070-1252-00.pdf|7B53A/7B53AN Operators Manual]] (OCR)
* [http://w140.com/smb/7b53a_an_svc_sm.pdf Tektronix 7B53 Service Manual (OCR, PDF)]
* [[Media:070-1342-00.pdf|7B53A/7B53AN Instruction Manual -00]] (OCR)
* [http://w140.com/tek_7B53A_opt_5.pdf Tektronix 7B53A Option 5 TV Sync Separator Manual (PDF)]
* [[Media:070-1342-01.pdf|7B53A/7B53AN Instruction Manual -01]] (OCR)
* [[Media:070-1471-00.pdf|7B53A/7B53AN Option 5 (TV Sync Separator) Instruction Manual Supplement]] (OCR)
 
<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 7B53 uses the −50 V supply provided by the mainframe.
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.
 
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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{{Spec | Options |
{{Spec | Options |
* 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):
** 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 769G adds Delay Gate and Delayed Sweep Gate rear outputs
** MOD 816J adds Main Trigger and Delayed Trigger In connectors parallel to rear panel interface C1 and C2
}}
}}
{{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, the delayed sweep or the main sweep hold-off. 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''.
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. See the 1975 TekScope article linked below.
 
===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 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. Sensitivity on the external input is 100 mV/Div, 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.
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, as determined by the Trigger Source switch setting.  
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.


===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, 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.
* [[Media:Tekscope 1975 V7 N5.pdf|TekScope Vol. 7 No. 5, 1975 p.15+: Dave McCullough, ''Delayed gate aids oscilloscope digital measurements'']]
 
* [https://www.youtube.com/watch?v=75wUU_tc-zc Tektronix 7B53A Repair and Alignment] by Zenwizard Studios @ YouTube
===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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<gallery>
<gallery>
7b53a-left.jpg   | left side
7b53a-left.jpg       | left side
7b53a-right.jpg | right side
7b53a-right.jpg     | right side
Tek 7b53a 34.JPG | 3/4 profile
7b53a_20.jpg        |
tek_7b53an_1.jpg|7B53AN
7b53a_21.jpg        |
tek_7b53an_2.jpg|7B53AN
7b53a_22.jpg        |
Tek 7b53a front2.jpg|7B53A
Tek 7b53a 34.JPG     | 3/4 profile
tek_7b53an_1.jpg     | 7B53AN
tek_7b53an_2.jpg     | 7B53AN
Tek 7b53a front2.jpg | 7B53A
TD-1085U.jpg        | TD-1085/U, military version of 7B53AN
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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