Tektronix 7B85 Delta Delaying Time Base

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BAMA 7B85 Free Manual Download Site

Quick Specifications / Photos
Detailed Specifications
Operating Instructions
Misc. Part Numbers

ORIGINAL COSTS
Tektronix Catalog CostLow BidHigh Bidaverage
$895 (1977)
$1510 (1982)
$1755 (1985)
$2140 (1989)
17.505030.30
$34.33 7/26/01 #1618647799 jtsele
$39.88 7/27/01 #1619055138 noblecarellc
$37.36 8/3/01 #1621341117 bbg
$32.00 8/4/01 #1622286580 chillu
no bid (asked $39.99) 8/5/01 #1621092370 treasuretek
$26.25 8/5/01 #1622014194 sargemark
no sale ($27 < reserve) 8/7/01 #1622506582 riversone
$34.33 8/15/01 #1625459247 ridgeeq
$28.99 8/17/01 #1626137981 bbg
* $28.03 9/1/01 #1631228864 nobelcarellc
$27.99 9/14/01 #1636228269 bbg
$17.50 9/18/01 #1637667970 jsrlab
$19.10 9/21/01 #1638622520 bbg
$33.95 10/17/01 #1648695663 judinkes
$22.72 10/19/01 #1649717511 zamer88505
$27.00 10/27/01 #1652927395 zamer88505
$35.99 10/27/01 #1652910346 azreb
no bids (asked $60) 10/31/01 #1654578309 pete-sigep
$37.00 11/1/01 #1654976281 rrkotowski
no bids (asked $155) 11/2/01 #1657090895 teoutlet
$50.00 (buy it now) 11/6/01 #1657488328 techcycle
$19.95 11/8/01 #1657872077 del1935
$29.88 11/9/01 #1658568753 zamer88505
$29.88 11/12/01 #1661769722 notchback
$25.52 11/13/01 #1661072161 cradio
$18.26 12/8/02 #1921814124 qcal
$41.00 1/10/03 #3105010467 bill_dee (7 bids $5 start)
$10.50 (+$12 ship) 1/11/08 #280190689905 surplusauctions (3 bids $4.99 start) (untested - condition=fair)
$9.99 (+$19 ship) 12/1/10 #260697727253 funkyjunquetech (1 bid) (works except red time var knob locked up)

QUICK SPECS / PHOTOS
  • Delta Time Measurements with CRT Readout
  • Delay Time Measurements with CRT Readout
  • Vertical Trace Separation between Two Delayed Sweeps
  • Calibrated Time Base: 1 ns to 5 s/div with 1.5% accuracy (50 ns to 0.5 s/div)
  • Triggering to 400MHz
  • Variable Trigger Holdoff
  • Peak-to-peak Auto Triggering
  • Out of production 11/1/2000



    The 7B80 and 7B85 are horizontal time bases recommended for use with 7700, 7800 and 7900 Series Mainframes to provide optimum bandwidth/sweep-speed compatibility. (Each may be used in any slower 7000 Series Mainframe with some reduction in sweep accruacy at the fastest sweep speed.)

    Either plug-in can be used separately as an independent single time base, or they can be combined in any mainframe with two horizontal compartments for delaying and delayed operation.

    The 7B80 and 7B85 pair provide the Δ time measurement capability in addition to the standard delay time capability. Either time interval is digitally displayed on the crt. A single intensified zone, which you can position anywhere on the trace, identifies the delay time interval (the time from the "A" or main sweep to the start of the intensified zone). Two intensified zones, which you can position anywhere on a trace, identify the Δ time interval (time between intensified zones_. Alternate sweep switching makes it possible to display the information between the intensified zones full screen at the "B" sweep speed. By overlapping the two expanded waveforms, you are confident of the exact positioning of the intensified zones on the "A" sweep. This results in easy-to-make, precise and repeatable timing measurements.

    (from the 1977 and 1982 Tektronix Catalogs)
    SPECIFICATIONS

    OPERATING INSTRUCTIONS

    MISC PART NUMBERS



    SAMPLES OF E-BAY PRICES
    $895 (1977)
    $1510 (1982)
    $1755 (1985)
    $2140 (1989)