7B90P

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

Manuals – Specifications – Links – Pictures

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 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; 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

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  Front

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  Front

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  Right

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  Right

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  Left

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  A late version of the 7B90P with connectors for the 021-0374-00 GPIB decoder

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  Connectors for the 021-0374-00 GPIB decoder on a late 7B90P

Custom ICs used in the 7B90P