Tektronix 503, Instruction Manual

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SECTION 1
CHARACTERISTICS
Type 5 0 3
Introduction
The Tektronix Type 503 Oscilloscope is a low-frequency,
high-sensitivity laboratory instrument providing accurate
measurements in the range from DC to 450 kHz. Identical
vertical and horizontal amplifiers may be used for accurate
curve plotting in the X-Y mode of operation. Both am pli­
fiers may be operated with single-ended inputs for con­
ventional operation, or with differential inputs for can­
cellation of common-mode signals. Sweep rates to 1 micro­
second per centimeter, combined with sweep magnification
factors to 50, provide effective calibrated sweep rates
to 0.1 microsecond per centimeter.
VERTICAL AND HORIZONTAL AMPLIFIERS
Characteristic
Performance Requirement
Supplem ental Inform ation
Bandwidth
DC Coupled DC to 450 kHz
AC Coupled LF Response
< 10 Hz LF —3 dB < 1 Hz with 10:1 probe
Rounding, ringing, overshoot
and tilt + 2%
Deflection Factor
-t3 % , 1 mV to 20 V /C M Steps in 1, 2, 5 sequence
Variable
Ratio >2.5:1
Common Mode Rejection
Sensitivity (V /C M ) Rejection Ratio C om m on-m ode Signal
DC input coupling with < 5 0 kHz sine wave
(With AC coupling, 1 kHz to 50 kHz) 1 mV to .2 V 100:1 min 4 V(P to P) max
.5 V to 2 V
30:1 min
40 V(P to P) max
5 V to 20 V
30:1 min 400 V(P to P) max
Phasing < 1 ° (1 mV/CM to .2 V/CM) to 450 kHz W ith equal X and Y sensitivities, Variable
Control in CALIBRATED position, like polar­
ities, and DC input coupling
< 2 ° (0.5 V /C M to 20 V/CM) to 50 kHz
Maximum Input Voltage
350 V (DC + peak AC)
Input R and C Approximately 1 megohm -t-1.5%
Paralleled by 47 pF + 2 %
Warm-up Time Meets required accuracies after 20 minutes
SWEEP GENERATOR
Time Base
Calibrated Sweep Accuracy within ± 3 % , 1 /xs to 5 s/cm Steps in 1, 2, 5 sequence
Magnifier Accuracy within -t-5% when magnified
sweep rate does not exceed .1 /is/cm X 2 , X 5 , X 1 0 , X 20, and X 5 0 m agnifi­
cations available
Variable Range Ratio >2.5:1
TRIGGERING
Trigger Sensitivity
Internal AC 0.5 cm 50 Hz to 50 kHz, increasing to 2
cm at 450 kHz
DC 0.5 cm to 50 kHz, increasing to 2 cm at
450 kHz
AUTO 0.8 cm 50 Hz to 50 kHz, increasing to 2.5
cm at 450 kHz
Approximately 50 Hz with no signal
External AC
0.5 V 50 Hz to 450 kHz
DC 0.5 V to 450 kHz
AUTO
0.5 V 50 Hz to 450 kHz
Approximately 50 Hz with no signal
Trigger Level Range
U9 V
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