7B15: Difference between revisions

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* [http://bama.edebris.com/download/tek/7b15/tek-7b15.pdf Tektronix 7B15 Manual (PDF)]
{{Plugin Sidebar
* [http://w140.com/smb/7b15_sm.pdf Tektronix 7B15 Manual (OCR, PDF)]
|manufacturer=Tektronix
|type=7B15
|summary=1 GHz delaying timebase
|image=7b15-front.jpg
|caption=7B15
|introduced=1978
|discontinued=1990
|series=7000-series scopes
|designers=Art Metz;Bruce Hofer;Val Garuts
|manuals=
* [[Media:070-2319-00.pdf|7B15 Operator's Manual]] (OCR)
* [[Media:070-2318-00.pdf|7B15 Instruction Manual]] (OCR)
}}
The '''Tektronix 7B15''' is a 1 GHz delaying time base for [[7000-series scopes]],
in particular, the 1 GHz [[7104]] (typically used with [[7A29]] vertical amplifiers and a [[7B10]] delayed time base).
The 7B15 was designed by [[Art Metz]], [[Bruce Hofer]], and [[Val Garuts]].
 
The 7B15 provides digital readout of delay and delta times. 
In effect, the 7B15/[[7B10]] pair are speed-improved versions of the [[7B85]]/[[7B80]].
 
{{BeginSpecs}}
{{Spec | Sweep | 200 ms/Div to 2 ns/Div in 1−2−5 sequence, ×10 magnifier down to 200 ps/Div, variable to ×2.5}}
{{Spec | Triggering | to 1 GHz }}
{{Spec | Jitter | less than 30 ps at 1 GHz }}
{{Spec | Features |
* Digital read-out of delay and delta times
* Variable Trigger Holdoff
* HF Sync mode
}}
{{EndSpecs}}
 
==Links==
* [[Patent US 4109182A]]
{{Documents|Link=7B15}}
{{PatentLinks|7B15}}
 
==Internals==
A ramp generator is started when the trigger signal arrives. 
The delayed sweep is started when a comparator detects that the ramp has reached a control voltage, set by the front panel knobs.
The control voltage is therefore proportional to the amount of delay and is measured using a [[155-0185-00]] 4-digit DVM circuit,
then displayed on the [[7000 series readout system|oscilloscope readout]].
The display, scaled in seconds, provides the operator with a precise readout of the delay.
 
Other custom Tek ICs used: [[155-0150-00]] trigger detector,  [[155-0160-00]] trigger amplifier.
 
The 7B15 uses the +50 V supply provided by the mainframe.
 
==Prices==
<!-- http://www.usinflationcalculator.com/ -->
{| class="wikitable"
|-
! Year
! 1980
! 1985
! 1990
|-
! Catalog price
|align=right| $1,695
|align=right| $2,695
|align=right| $3,300
|-
! In 2023 Dollars
|align=right| $6,300
|align=right| $7,700
|align=right| $7,800
|-
|}
 
==Pictures==
 
<gallery>
7b15-front.jpg            | 7B15 front panel
7b15-left.jpg              | left side
7b15-right.jpg            | right side
Tek-7b15-vs-7b85-left.jpg  | Family resemblance: 7B15 (top) vs. 7B85 (bottom).  Left side.
Tek-7b15-vs-7b85-right.jpg | Family resemblance: 7B15 (top) vs. 7B85 (bottom).  Right side.
 
Tek 7b15 front.jpg
Tek 7b15.JPG
</gallery>
 
==Components==
{{Parts|7B15}}
 
[[Category:7000 series horizontal plugins]]