Tektronix 551 Dual Beam Instruction Manual page 6

Specifications— Type 551
the Type P when used with a Type 581 or 585 Oscilloscope
is approximately 4 nanoseconds. Pulse repetition rate is 240
step functions per second, with either positive or negative
polarity. Step function amplitude is continuously adjustable
between 0 and 3 major graticule divisions.
Type Q
The Type Q Plug-In Unit permits any Tektronix convertible
oscilloscope to be operated with strain gages and other
transducers. Excitation voltages for the strain gages and
transducers are provided by the plug-in unit. The unit pro­
vides high gain, low noise, and extremely low drift. Fre­
quency response of the Type Q Plug-In Unit is DC to 6 kc;
risetime is approximately 60 microseconds. Strain sensitivity
is calibrated in 10 steps from 10 microstrain per major grati­
cule division to 10,000 microstrain per division, and is con­
tinuously variable between steps.
Type R
The Type R Plug-In Unit is a combined power supply and
pulse generator which is used to measure the high-frequency
characteristics of junction transistors by the pulse-response
method. When the Type R Unit is used in an oscilloscope
incorporating a delay line, a display may be obtained which
shows delay time, risetime, storage time and falltime simul­
taneously. In addition, operation of a push-button switch
connects a front-panel terminal directly to the Input of the
oscilloscope. This connection permits you to observe other
waveforms, such as the input waveform of the transistor
under test.
Specifications of the Type R include a risetime of less than
5 nanoseconds; pulse amplitudes in 8 fixed, calibrated steps
from .05 to 10 volts, adjustable between steps—and pulse
recurrence frequency of 120 pulses/sec.
Type S
The Type S Plug-In Unit is designed for use with Tektronix
Wide-Band convertible oscilloscopes, with its primary ap­
plication being as a diode tester. The crt switching display
depicts voltage across a test diode as a function of time.
Certain diode parameters, such as junction resistance, junc­
tion capacitance, and the stored charge at the junction, can
be measured readily and reliably from the display.
formance of a diode in a particular circuit can be predicted
by analyzing the recovery and "turn-on" characteristics.
Since it is essentially a means for plotting voltage across an
element while passing constant current through it, the unit
can be used for other applications as w e ll...fo r example,
observing the junction characteristics of transistors, or to
measure the resistance, capacitance or inductance of circuit
components. The Type S offers calibrated forward currents
in five fixed steps from 1 to 20 milliamps, and reverse currents
calibrated in six steps from 0 to 2 milliamps. Diode shunt
capacitance is 9 picofarads, and amplifier sensitivity mea­
sure 0.05 v/cm and 0.5v/cm, calibrated.
1 -2
Type Z
The Type Z Plug-In Unit extends the accuracy of oscillo­
scope voltage measurements. It can be used in three modes
of operation: (1) as a conventional preamplifier, (2) as a
differential input preamplifier, or (3) as a calibrated dif­
ferential comparator. With sensitivity of 50 mv/cm and dy­
namic range of ± 1 0 0 volts, the effective scale length is
±2000 cm; hence, the resolution of the Type Z Unit is a
maximum of .005%. As a conventional preamplifier, the Type
Z Unit offers a risetime of 24 nanoseconds for signals that
do not overscan the screen, and sensitivities of 0.05 volfs/cm
to 25 volts/cm in 9 fixed, calibrated steps.
As a differential Input Preamplifier, the Type Z accepts a
common-mode Signal Level of ± 1 0 0 volts with input attenu­
ation XI; and offers a common-mode rejection ratio of
40,000 to 1. Input signals must not exceed +1 volt/7 nsec,
or —1 volt/5 nsec in order to avoid grid current.
As a calibrated differential comparator, the Type Z makes
available three comparison voltage ranges; from zero to ± 1
volt, zero to ± 1 0 volts, and zero to ±1 00 volts.
HORIZONTAL-DEFLECTION SYSTEM
Sweep Rates
Twenty-four calibrated sweep rates from .1 /isec/cm to 5
sec/cm. Accuracy typically within 1 % of full scale; in all
cases within 3% of full scale.
Continuously variable sweep rates are available from .1 ynsec/
cm to 12 sec/cm.
Magnifier
Expands sweep five times to the right and left of the crt-
screen center. Extends the fastest sweep rate to .02/xsec/cm.
Accurate within 5%.
Unblanking.
DC coupled.
Triggering Signal Requirements
Per­
Internal—2 mm of vertical deflection.
External— .2 v to lOOv, peak-to-peak.
Frequency range—dc to 5 me.
Synchronizing Signal Requirements
Internal—2 cm of vertical deflection.
External—0.5 to 20 v, peak-to-peak.
Frequency range—5 me to 30 me.