Tektronix 1S1 Instruction Manual page 7

Characteristics – Type 1S1
Smoothing Control Range
At least 3:1 reduction of display noise (compared to noise
present at normal-response
SMOOTHING control set fully counterclockwise.
display dot density is low, smoothing reduces dot transient
response of the system.
Interdot Blanking
Internally coupled through oscilloscope chopped blanking
circuit, with CRT Cathode Selector switch at Chopped Blank-
ing position.
Retrace Blanking
Off-screen retrace, produced by signal applied internally
through vertical channel.
Trigger Takeoff Signal
Signal amplitude to trigger circuit is approximately 1/7
the amplitude of the vertical input signal.
DC Offset
At least +1 volt to -1 volt offset range, obtained through
use of the front-panel DC OFFSET control.
full sensitivity even in the presence of dc levels up to ±1
volt.
Vertical Position Control Range
At least 10 cm positioning capability on the crt screen.
Offset Output
At least +10 volts to
Voltage change at the front-panel OFFSET OUTPUT jack is
10 times the voltage change (±2%) of the display produced
by use of the DC OFFSET control.
accurate measurement of dc voltage level changes.
Front-Panel Vertical Output
200mv amplitude (±3%) per cm of crt display, into a
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highimpedance load. Output signal is the real-time waveform
of the sampled signal displayed on the crt screen.
HORIZONTAL SYSTEM
Display Modes
Repetitive, single-sweep, manual scan or external horizon-
tal scan, selected by the front-panel DISPLAY MODE switch.
In SINGLE SWEEP position, the START button starts a single
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sweep of the dipslay.
Equivalent Sweep Rates
50 µsec/cm through 1 nsec/cm, unmagnified, in 15 cali-
brated steps. Sequence is 1, 2, 5. A direct-reading magnifier
provides up to X100 magnification (depending on the sweep
rate) with no change in dot density. Magnification takes
1-2
position) with front-panel
1
If the
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Permits use of
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-10 volts offset monitor range.
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Output voltage permits
place about the left edge of the screen. Using the magnifier,
the fastest calibrated sweep rate is 100 psec/cm.
An uncalibrated Time/Cm VARIABLE control provides
sweep rates between the calibrated steps, increasing the
sweep speed up to at least 3 times the calibrated speed
and extending the fastest magnified rate to about 33 psec/cm.
Equivalent Sweep Rate Accuracy
Within 3% of the rate indicated by the TIME/CM switch
(with the VARIABLE control at CAL), excluding the first por-
tion of each time position ramp when the oscilloscope de-
flection factor is set to 1 volt/cm ±1%.
cluded (with the TIME POSITION and FINE controls fully
clockwise) is the first 20 µsec of the ramp on the 500 µS
range, 2 µsec on the 50 µS range, 200 nsec on the 5 µS
range, 20 nsec on the 500 nS range and 4 nsec on the 50 nS
range.
th
Display Time Positioning
50 nsec to 500 µsec time-positioning capability, depending
on the equivalent sweep rate and magnification. TIME
POSITION and FINE controls delay the start of the display
time window over the approximate range indicated by the
blue tab on the TIME POSITION RANGE switch, as read
on the blue Time Position Range scale. Total duration of
observable display time is equal to the TIME POSITION
RANGE setting plus the time width of the crt screen.
Display Samples/Cm
Continuously variable from approximately 5 samples/cm to
more than 7,000 samples/cm.
ceptibly when the control is switched to SWEEP OFF position.
Front-Panel Horizontal Output
1 volt/cm of horizontal display (±1%) when the horizontal
deflection factor of the oscilloscope is adjusted correctly.
External Horizontal Deflection Factor
1 volt/cm ±4% with the EXT HORIZ ATTEN control
turned fully clockwise.
16 volts (or more)/cm with the EXT HORIZ ATTEN control
turned fully counterclockwise.
Display Jitter
0.02% or less of the 500 µS, 50 µS or 5 µS time position
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ranges.
0.024% or less of the 500 nS time position range.
0.08% or less of the 50 nS time position range.
These values apply when using a 400-mv to 1-volt trigger-
ing signal with a fast rise (relative to the minimum amount
of triggering jitter).
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Performance requirement checked at the factory.
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The portion ex-
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Sweep may progress per-
1
1
1
,
1
1
1