Tektronix TAS 455, Service Manual

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Warranted Characteristics
TAS 455 and TAS 465 Service Manual
1Ć13
TableĂ1Ć12:ăWarranted Characteristics Ċ Triggering System (Cont.)
Name Description
Delay Difference Between Ext Input and
Any Channel
<2 ns.
External Trigger Input Impedance 1 M W ± 2% in parallel with 20 pF ±2.0 pF.
Maximum Input Voltage ±400 V (DC + peak AC); derate at 20 dB/decade from 100 kHz to
13 V at 3 MHz.
TableĂ1Ć13:ăWarranted Characteristics Ċ Video Triggering
Name Description
Sensitivity 0.75 divisions of composite sync will achieve a stable display.
60 Hz Rejection Stable video trigger with up to 4 divisions of 60 Hz on the video
signal.
Sync Offset Stable video trigger if sync tip is ±15 divisions, referenced to input
ground.
Sync Separation Stable trigger on positive or negative composite horizontal sync
(lines) video, for all 525/60 and 625/50 video systems which include:
NTSC, PAL, and SECAM.
Field Interval Stable trigger on vertical sync interval >20 m s.
TableĂ1Ć14:ăWarranted Characteristics Ċ Cursors
Name Description
Time Cursor to SignalAccuracy Same as Time Base Ac 0.1 division.
1/ Time Accuracy Readouts calculated using Time cursor difference.
Absolute Volts Accuracy Accuracies are as follows:
Condition Accuracy
-10 _ C to +30 _ C ±(1% of r 2% of one vertical
di HF display 0.5 mV +
trace shift errors).
+30 _ C to +55 _ C ±(1% of r 2% of one vertical
di HF display 4 mV +
trace shift errors).
Volts Cursor to Signal Accuracy ±(1.6% of r 2% of one vertical di HF display
errors).