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Delaying Time Base 7B15

Delaying Time Base 7B15; Tektronix Guernsey (ID = 2579967) Equipment
Delaying Time Base 7B15; Tektronix Guernsey (ID = 2518201) Equipment Delaying Time Base 7B15; Tektronix Guernsey (ID = 2518202) Equipment
Delaying Time Base 7B15; Tektronix Guernsey (ID = 2518203) Equipment
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Delaying Time Base 7B15; Tektronix Guernsey (ID = 2518201) Equipment
Tektronix Guernsey: Delaying Time Base 7B15 [Equipment] ID = 2518201 1166x2100
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For model Delaying Time Base 7B15, Tektronix Guernsey Ltd. ; St.Peter Port
Country:  Guernsey
Manufacturer / Brand:  Tektronix Guernsey Ltd. ; St.Peter Port
Year: 1978–1990 ? Category: Service- or Lab Equipment
Semiconductors (the count is only for transistors) Semiconductors present.
Wave bands - without
Power type and voltage Powered by external power supply or a main unit.
Loudspeaker - - No sound reproduction output.
Power out
from Model: Delaying Time Base 7B15 - Tektronix Guernsey Ltd. ; St.
Material Metal case
Shape Chassis only or for «building in»

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.


Sweep200 ms/Div to 2 ns/Div in 1-2-5 sequence, ×10 magnifier down to 200 ps/Div, variable to ×2.5
Triggeringto 1 GHz
Jitterless than 30 ps at 1 GHz
  • Digital read-out of delay and delta times
  • Variable Trigger Holdoff
  • HF Sync mode


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. 

Price in first year of sale 6'851.00 CHF
Mentioned in -- Original-techn. papers. (Product & Preislist 1987)
Literature/Schematics (1) - - Manufacturers Literature (7B15 Operator's Instruction Manual First print Oct 1978, revised Oct 1983)

Model page created by Detlef Boeder. See "Data change" for further contributors.

All listed radios etc. from Tektronix Guernsey Ltd. ; St.Peter Port
Here you find 5 models, 5 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.