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The 7B53A and 7B53AN Dual Time Base units provide
{{Plugin Sidebar 2|
Main, Intensified, Delayed, and Mixed sweep operation for
title=Tektronix 7B53A |
[[7000-series scopes]]. Calibrated
summary=Dual Timebase |
sweep rates from 5 s/div to 50 ns/div (5 ns with XI0
image=Tek-7b53a-front.jpg |
magnification) and triggering to 100 MHz are provided.
caption=Tektronix 7B53A Timebase plug-in|
The 7B53A and 7B53AN are electrically identical except
introduced=1973 |
that only the 7B53A is compatible with the alphanumeric
discontinued=1992 |
readout system provided for 7000-series Oscilloscopes.
series=[[7000-series scopes]]|
manuals=
* [http://bama.edebris.com/download/tek/7b53a/Tektronix_7B53A_Service_May88.pdf Tektronix 7B53A and 7B53AN Manual (PDF)]
* [http://w140.com/smb/7b53a_an_ops_sm.pdf Tektronix 7B53A and 7B53AN Operators Manual (OCR, PDF)]
* [http://w140.com/smb/7b53a_an_svc_sm.pdf Tektronix 7B53A and 7B53AN Service Manual (OCR, PDF)]
* [http://w140.com/tek_7B53A_opt_5.pdf Tektronix 7B53A and 7B53AN Option 5 TV Sync Separator Manual (PDF)]
* [[media:7B53A_MOD.pdf|7B53A and 7B53AN Custom Modifications Manual (PDF)]]
* [[Media:061-1570-00.pdf|7B53A and 7B53AN Mods (PDF)]]


* [http://bama.edebris.com/download/tek/7b53a/Tektronix_7B53A_Service_May88.pdf Tektronix 7B53A Manual (PDF)]
}}
* [http://w140.com/smb/7b53a_an_ops_sm.pdf Tektronix 7B53 Operations Manual (OCR, PDF)]
 
* [http://w140.com/smb/7b53a_an_svc_sm.pdf Tektronix 7B53 Service Manual (OCR, PDF)]
The '''Tektronix 7B53A''' and '''7B53AN''' is a 100 MHz dual time base plug-in for [[7000-series scopes]].
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
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".  
There is a 7B53N, a 7B53A, and a 7B53AN.
 
{{BeginSpecs}}
{{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 | 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 | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Jitter      | < 1 ns at 75 MHz }}
{{Spec | Features |
* Dual delayed timebase
* External trigger inputs for main and delayed
* Display modes: Main, Intensified, Delayed, Mixed
}}
{{Spec | Options |
* 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}}
 
==Operation==
===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''.
 
===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.
 
===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.
 
===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==
{| class="wikitable"
|-
! Year
! 1973
! 1976
! 1980
! 1984
! 1990
|-
! Catalog price
|align=right|  $850
|align=right|  $925
|align=right| $1,135
|align=right| $1,515
|align=right| $2,500
|-
! 2015 value
|align=right| $4,520
|align=right| $3,840
|align=right| $3,250
|align=right| $3,440
|align=right| $4,520
|-
|}
 
==Pictures==
 
<gallery>
7b53a-left.jpg      | left side
7b53a-right.jpg      | right side
7b53a_20.jpg        |
7b53a_21.jpg        |
7b53a_22.jpg        |
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
</gallery>
 
 
[[Category:7000 series horizontal plugins]]

Revision as of 09:51, 16 December 2019

Template:Plugin Sidebar 2

The Tektronix 7B53A and 7B53AN is a 100 MHz dual time base plug-in for 7000-series scopes. 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 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". There is a 7B53N, a 7B53A, and a 7B53AN.

Key Specifications

Sweep rates 50 ns/Div to 5 s/Div in 1—2—5 sequence (5 ns with ×10 magnification)
Deflection 10 mV/Div, 100 mV/Div or 1 V/Div, up to 2 MHz
Sensitivity 0.3 Div or 100 mV up to 10 MHz, 1.5 Div or 500 mV up to 100 MHz
Coupling DC, AC (> 30 Hz), AC LF REJ (> 30 kHz), AC HF REJ (30 Hz — 150 kHz)
Input impedance 1 MΩ // 20 pF
Jitter < 1 ns at 75 MHz
Features
  • Dual delayed timebase
  • External trigger inputs for main and delayed
  • Display modes: Main, Intensified, Delayed, Mixed
Options
  • 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

Operation

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. TekScope Vol. 7 No. 5, 1975 p.15+: Dave McCullough, Delayed gate aids oscilloscope digital measurements.

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.

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.

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

Year 1973 1976 1980 1984 1990
Catalog price $850 $925 $1,135 $1,515 $2,500
2015 value $4,520 $3,840 $3,250 $3,440 $4,520

Pictures