Tektronix 175, Manual

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SPECIFICATIONS
General Description
The Type 575 Transistor Curve Tracer displays the dynamic
characteristic curves of both junction and point-contact tran ­
sistors on the screen of a 5-inch cathode-ray tube. Several
different transistor characteristic curves may be displayed,
including the collector family in the common-base and com ­
mon-emitter configuration. Regulated current or voltage steps
are applied to the input of the transistor under test. A recti­
fied sine wave of controllable amplitude is used for the col ­
lector sweep. The family of characteristic curves is accurately
plotted as either a repetitive or single-family display.
Tolerances and accuracies as stated in Specifica­
tions section and the Recalibration Procedure of
this manual apply only to Type 575 instruments
above serial number 8030.
Operating Specifications
Collector Sweep
0-200 volts minimum peak with 1-ampere current curves.
0-20 volts minimum peak with 20-amperes current curves.
Base Step Generator
Generates 4-12 current- or voltage-steps per family of curves
at 120- or 240-steps per second (2- or 4-times power-line
frequency) for either repetitive or single-family displays.
17 current-step ranges from 1 uA /step to 200 m A /step ±3%.
5 voltage-step ranges from .01 volt/step to .2 volt/step ±3%,
with output impedance adjustable from 1 ohm to 22 thou­
sand ohms ±5%.
Vertical Display
Plots collector current from 0.01 ma/div. to 1000 ma./div.
±3°/, in 16 calibrated steps. Pushbuttons provide multiply ­
ing each current step by 2 or dividing by 10, increasing the
current range from 0.001 ma./div. to 2000 ma./div. ±3%.
Plots base voltage from .01 volt/div. to .5 volt/div. ±3%
in 6 calibrated steps.
Plots base current or base source volts with sensitivity read
from step selector switch ±3%.
Horizontal Display
Plot collector voltage from .01 volt/div. to 20 volt/div. ±3%
in 11 calibrated steps.
Plots base voltage from .01 volt/div. to .5 volt/idv. ±3%
in 6 calibrated steps.
Plots base current or base source volts with sensitivity read
from step collector switch ±3%.
Other Features
Comparison switch permits rapid manual switching between
two transistors for comparison tests.
Regulated power supplies and negative-feedback amplifiers
assure the accuracy of the calibration and the stability of
the display.
Cathode-ray tube is a Tektronix T52P. Accelerating potential
is approximately 4 kv. Pl phosphor is supplied unless
another phosphor is requested. P2, P7, or Pl 1 phosphors
are available at no extra charge.
Differential inputs to both vertical and horizontal amplifiers
are available at the rear of the instrument, or at the Type
175 adaptor socket on instruments after S/N 3659. The
sensitivity of each channel is .1 volt/div. and the bandpass
is approximately 300 kc. The rejection of a common-mode
signal is better than 100:1 with a peak-to-peak signal of
10 volts or less.
Mechanical Characteristics
Ventilation —Filtered- forced-air circulation maintains safe
operating temperature.
Construction —Aluminum-alloy chassis and three-piece cabinet.
Finish— Photoetched, anodized front panel, with blue vinyl
finished cabinet.
Dimensions — 24" long, 13" wide, 1 63/ 4 ’ 'high.
Weight —Approximately 70 lbs.
Power Requirements — 105-125 or 210-250 volts, 50-60 cycles;
410 watts maximum at 117 v, 60 cycles, depending upon the
type of transistor being tested, 200 watts standby.
Accessories
2—Transistor adapters, long, 013-010.
2—Transistor adapters, short, 013-012.
1— 3 to 2-wire adapter, 103-013.
2— 2N1381 Transistors, 151-039.
1—3-conductor power cord, 161-010.
1— Green filter, 378-514.
2— Instruction Manuals.
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