7B15

Manuals – Specifications – Links – Pictures

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 provides digital readout of delay and delta times. In effect, the 7B15/7B10 pair are speed-improved versions of the 7B85/7B80.

Key Specifications

Sweep	200 ms/Div to 2 ns/Div in 1−2−5 sequence, ×10 magnifier down to 200 ps/Div, variable to ×2.5
Triggering	to 1 GHz
Jitter	less than 30 ps at 1 GHz
Features	Digital read-out of delay and delta times Variable Trigger Holdoff HF Sync mode

Links

Documents Referencing 7B15

Document	Class	Title	Authors	Year	Links
Technology Report October 1979.pdf	Article	Patent Received: 4,109,182 Simultaneous Delayed Sweep Display	Oliver Dalton	1979	Patent US 4109182A • 7B80 • 7B85 • 7B10 • 7B15
Tekscope 1979 V11 N1.pdf	Article	1 GHz at 1 mV in a General Purpose Plug-in Oscilloscope	Hans Springer	1979	7104 • Hypcon • SHFIII • 7A29 • 7B10 • 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 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

Year	1980	1985	1990
Catalog price	$1,695	$2,695	$3,300
In 2023 Dollars	$6,300	$7,700	$7,800

Pictures

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  7B15 front panel

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  left side

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  right side

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  Family resemblance: 7B15 (top) vs. 7B85 (bottom). Left side.

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  Family resemblance: 7B15 (top) vs. 7B85 (bottom). Right side.

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Components

Some Parts Used in the 7B15

Part	Part Number(s)	Class	Description	Used in
151-1036-00	151-1036-00	Discrete component	dual n-channel JFET	4701 • 7B15
155-0049-00	155-0049-00 • 155-0049-01 • 155-0049-02	Monolithic integrated circuit	sweep control with lockout	335 • 464 • 465 • 466 • 475 • 475A • 475M • 485 • 5B31 • 5B40 • 5B52 • 5B42 • 5B44 • 7B53A • 7B80 • 7B85 • 7B87 • 7B92A • 7B90P • 7B10 • 7B15 • SC502 • 7B42N • AN/USM-281C • 067-0657-00
155-0149-00	155-0149-00	Monolithic integrated circuit	sweep control	7B10 • 7B15
155-0150-00	155-0150-00	Hybrid integrated circuit	trigger detector	7904A • 7104 • 7B10 • 7B15 • 7B92A • SCD1000
155-0160-00	155-0160-00	Monolithic integrated circuit	1.5 GHz trigger amplifier and source select	7B10 • 7B15 • 067-0587-02 • 067-0587-10
155-0185-00	155-0185-00	Monolithic integrated circuit	four-digit counter, latch and D/A converter/DVM	7B15 • 7B85 • 7B87