7B90P

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Tektronix 7B90
400 MHz Programmable Timebase
Tektronix 7B90P front

Compatible with 7000-series scopes

Produced from 1978 to 1989

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


The Tektronix 7B90P is a digitally programmable 400 MHz time-base plug-in for the digitizing mainframes of the 7000 series. Except for the sweep calibration screwdriver adjustment and the external trigger input terminator switch all other controls are programmable. The local/remote state of the 7B90P is slaved to the local/remote state of the mainframe.

Key Specifications

Sweep 10 ns/Div to 500 ms/Div (1-2-5), ×10 magnifier (down to 500 ps/Div), no variable sweep, adjustable and programmable holdoff
Excluded sweep First 10 ns in 79XX programmable mainframes
Trigger Sensitivity PP Auto Mode AC or DC 125 mV or 0.5 Div up to 50 MHz, 375 mV or 1.5 Div up to 400 MHz
Trigger Sensitivity Norm or Single Sweep AC 100 mV or 0.3 Div up to 50 MHz, 250 mV or 1.5 Div up to 400 MHz
Jitter <100 ps at 400 MHz
Ext. Trigger 1 MΩ // 20 pF Max. 250 V DC+peak AC
Ext. Trigger 50 Ω Max. 1 W
Sweep/Trigger Modes Peak-Peak Auto, Auto, Norm, Single Sweep


Internals

The 7B90P is controlled by a Motorola 6800 microprocessor.

Pictures


Custom ICs used in the 7B90P

Page Model Part nos Description Designers Used in
155-0049-00 M079G 155-0049-00 155-0049-01 155-0049-02 sweep control with lockout Bill DeVey 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
155-0109-00 M120B 155-0109-00 155-0109-01 trigger Gary Vance 5B25N 5B31 5B40 5B42 5B44 5S14N 7B50A 7B53A 7B80 7B85 7B87 7B81P 7B90P 7S14 7612D SC502 SC503 SC504
155-0126-00 M121 155-0126-00 trigger source selector and P-P auto amplifier Art Metz 7B50A 7B80 7B85 7B87 7B81P 7B90P
155-0164-00 H526(?) 155-0164-00 time slot switch 7A16P 7B90P 7A29P