Tektronix 5T1A Instrument Reference Book page 10

TRIES
RECOVERY TIME
suruey/cm
SOUREE
THRESHOLD
SA
Ge
5
Pen
eS
POLARITY fda
=
y a
5 ae
e.
EXT.
\
F000
;
wise
tall
CAL.
by
Man
START
JMORMAL
"0
SINGLE
DISPLAY 1
e
EXTERNAL
TRIGGER INPUT
TIME EXPANDER
5-250mV 50
xs * x20
x50 VARIABLE
i
SWEEP
TIME/CM
x1 xwo
coer
4 a
TIME POSITION
psec
1
The Type 5T1A Timing Plug-In Unit provides flexible
triggering and generates the time base. External trigger
sensitivity is 5mv, for pulses 1 nsec or wider. Triggers
larger than 250mv can be accommodated with external
attenuators. External input is ac coupled, approximately
3-db down at 300 kc (sine-wave) at the low end.
Time-base range covers an equivalent sweep rate from
100 psec/cm to 1 nsec/cm in 16 calibrated rates (to 10
psec/cm with full Time Expansion). Continuous adjustment
is possible between rates uncalibrated and to approximate-
ly 0.33 nsec/cm (3.3 psec/cm time expanded).
SAMPLING DISPLAY is in 5 calibrated steps of 5, 10, 20,
50, 100, (accuracy within 2%), and nominal 1000 samples/
cm.
SWEEP MODE selects either NORMAL (repetitive), SINGLE,
or TIMED displays. A timed slow scan is provided for those
applications requiring the connection of a Y-T or X-Y Re-
corder. The slow scan is nominally 7.5sec/cm and adjust-
able from 5 sec/cm to approximately 10 sec/cm.
EQUIVALENT SWEEP RANGE is in 16 calibrated rates
from 1 nsec/cm to 100 psec/cm, 1-2-5 sequence, accuracy
within 3%. A variable control permits continuous adjust-
TYPE 5T1A TIMING UNIT
l nsec/cm to 100 usec/cm Calibrated Sweep
Speeds
*X2 to X100 Time Expander (constant dots/cm)
*Time position provides delay through full time
base duration
Versatile Triggering
*5 to 1000 Samples/cm
Repetitive or Single Displays
*Timed display
*New features of Type 5T1A compared to Type 571.
ment -uncalibrated from approximately 0.33 nsec/cm to 100
pisec/cm.
TIME EXPANDER provides X1, 2, 5, 10, 20, 50, and 100
expansion that maintains a constant number of samples
per centimeter.
TIME POSITION allows time 'windowing' over the full
time base duration.
INTERNAL TRIGGERING, with the Type 4S1 vertical plug-
in unit, allows triggering from the vertical input signal. This
feature facilitates observation of the leading edge of fast-
rise input signals. Internal delay lines eliminate the need
for external delay networks and accurately preserve the
fast-rise characteristics of the Type 4S1. Nominally, the
leading edge of a fast-rise signal will appear more than 8
nsec after the equivalent sweep start. Sensitivity is 40 mv
for a 2-nsec wide pulse.
FREE RUN TRIGGERING provides stable displays when
using the Type 661 delayed-pulse generator.
EXTERNAL 50-OHM TRIGGER INPUT is ac coupled (1 psec
time constant) and allows direct connection of the Type 5TIA
to the trigger signal. Sensitivity is 5 mv for a fast-rise 2-nsec
wide pulse. An isolation stage reduces kickout to 5mvy or
less, with less than '/, nsec decay time constant.
TRIGGER THRESHOLD is continuously variable, +200 mv.
RECOVERY TIME may be varied from nominally 10 usec to
13 sec on sweep rates faster than 0.1 wsec/cm, longer on
slower sweep rates. This normally permits triggering from
irregularly spaced pulses. .
TRIGGER POLARITY can be either positive or negative.
TIME JITTER is less than 10 psec at 1 nsec/cm, and less
than 30 psec (or 0.01% of fast ramp, whichever is larger)
at 2nsec/cm or slower. This is under optimum conditions
of 100kc or less repetition rate, and fast-rise triggers of
40 mv, 1 nsec duration. Jitter increases with reduced trigger
rise rate, amplitude, or duration, and increased repetition
rate. Internal triggering with the Type 481, on a 50 mv
signal of 1 nsec duration, will display typically less than
100 psec of jitter. Internal triggering on a 100 Mc sine
wave, 1 v pk-to-pk, displays less than 50 psec of jitter. Syn-
chronizing at 1000 Mc (100 mv pk-to-pk external or 1 v in-
ternal) displays typically 80% of dots within 100 psec.
MECHANICAL FEATURES include an aluminum-alloy chas-
sis, and anodized front panel. Net weight is 6 pounds.
Shipping weight is 12 pounds, approx.
TYPE STIA TIMING PLUG-IN UNIT 22.2 aces eer enus $750
Each instrument includes: 2—10X 50-Q attenuators, 1 —
10-nsec 50-Q cable, 2 — instruction manuals.