7D11

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Tektronix 7D11
digital delay
7D11 front view

Compatible with 7000-series scopes

Produced from 1972 to 1986

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 7D11 Digital Delay can be used to delay a 7B timebase by a given time up to 1 second in 100 ns increments, or by a number of events (1 to 107 at up to 50 MHz). The selected delay is displayed in the on-screen readout (7 digits). An analog fine delay control can add from 0 to 100 ns in delay mode. The 7D11 has an internal reference oscillator or can accept an external 1 MHz input. The 7D10 is essentially the same but without this oscillator and time delay mode.

For internal triggering, the 7D11 must be operated in the A Horizontal compartment (of a four-bay mainframe) to control the delay mode of a timebase in the B Horizontal compartment. If installed in a vertical compartment, it can display the "delay interval pedestal" as its Y output signal (centered on screen, no position control) and can supply a trigger signal to a timebase in either horizontal compartment. However, since mainframes do not route internal trigger signals to vertical bays, the 7D11 itself must be triggered externally in this case (which is the only possibility to use it in a three-bay mainframe).

Two switches internal to the 7D11 allow the user to enable Z axis modulation and "echo mode" to double the indicated delay, respectively. The latter is provided for radar or TDR applications where the delay time of the reflected pulse is twice the cable delay.

Carlo Infante was project manager, Bob Beville design leader, Bruce Hofer design engineer.

Key Specifications

Delay time 100 ns to 1 s in 100 ns increments (0-100 ns analog fine control)
Events mode 1 to 107 counts controlled by separate Events Start input
Event count or trigger input max. 50 MHz
Trigger 150 mV to 10 MHz, 500 mV to 50 MHz (0.3 Div / 1 Div respectively for internal triggering); LF REJ 30 kHz, HF REJ 50 kHz
Internal reference 5 MHz +/- 0.5 ppm, drift < 10-7 per month
Jitter < 2.2 ns or delay * 10-7 (whichever is greater)

Links

Documents Referencing 7D11

Document Class Title Authors Year Links
Aug 11 1972 7d11 7d15 marketing sales release.pdf Article 7D11+7D15 Marketing Sales Release 1972
Tekscope 1972 V4 N6 Nov 1972.pdf Article Delaying Sweep Goes Digital Bob Beville 1972
7000 series brochure March 1973.pdf Brochure 7000 series brochure, March 1973 1973
Tekscope 1974 V6 N1.pdf Article Flexible Disc Measurements Simplified by Digital Delay 1974
Tekscope 1975 V7 N1.pdf Article Sweep Delay Today Dave Dunlap 1975
7000 Series Digital Plug-In Applications.pdf Application Note 7000 Series Digital Plug-In Applications 1977
FastTransitionSlowSweep 7D11 7834.pdf Application Note Viewing Fast Transitions at Slow Sweep Speeds 1978
42W-5588.pdf Application Note Advanced Triggering Techniques Roger Ensrud 1984

Prices

Year 1973 1980 1986
Catalog Price $1,475 $2,100 $3,400
In 2023 Dollars $10,200 $7,800 $9,500

Pictures

Components

Some Parts Used in the 7D11

Part Part Number(s) Class Description Used in
155-0022-00 155-0022-00 155-0022-01 Monolithic integrated circuit analog multiplexer 147 148 149 335 468 1430 1441 1461 1900 1910 2220 2221 2230 5223 5403 5440 5441 5443 5444 5A38 7313 7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 R7912 7912AD 7912HB 7904 R7903 7904A 7934 7A12 7A18 7A18A 7A18N 7B52 7B53N 7D10 7D11 7D12 NT-7000 P7001
1N3717 152-0381-00 152-0125-00 Discrete component 4.7 mA, 25 pF tunnel diode 1L40 1S1 1S2 11B1 11B2 11B2A 147A 1470 148 21A 22A 3B4 3B5 408 432 434 453 453A 454 466 491 5T3 544 RM544 546 RM546 547 RM547 556 RM556 7B70 7B71 7D11
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 1S2 1502 21A 22A 3T5 3T6 475 475A 475M 544 R544 546 RM546 547 RM547 556 R556 581A 585A RM585 7B52 7B53N 7B70 7B71 7D10 7D11 7T11 7T11A R7912 S-51 S-52 TU-5 067-0572-00 067-0572-01 067-0681-00
STD704 152-0125-00 Discrete component 4.7 mA tunnel diode 1L40 1S1 11B1 11B2 11B2A 147 R147 147A R147A 1470 148 R148 148-M 149 R149 149A R149A 21A 22A 3B4 3B5 408 432 434 453 453A 454 464 465 466 491 5T3 544 RM544 546 RM546 547 RM547 556 RM556 7B70 7B71 7D11