Tektronix 519 User manual

INSTRUCTION
MIAN UAL
IMPORTANT
Before operating this instrument, be sure to remove
the plastic shipping clamps from the shock mounts
of the amplifier chassis. These clamps should
be saved and reinstalled as shown in the sketch if
the instrument is to be shipped. Be sure the tongue
is inserted next to the chassis to prevent damage
to the shock mount.
The clamp should be on the same side of the shock
mount as the nut.
SHIPPING CLAMP
~<a—— WITH TONGUE
TOWARD CHASSIS
RUBBER
MOUNT CHASSIS
Tektronix, Inc.
S.W. Millikan Way @ P. O. Box 500 @ Beaverton, Oregon 97005 @ Phone [phone] @ Cables: Tektronix
070-243

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General Information
The Tektronix Type 519: Oscilloscope is a wide-band
laboratory instrument designed expressly for the observation
and measurement of high-frequency phenomena. Fast
linear sweeps, high CRT accelerating potential, excellent
triggering sensitivity, wide-band trigger system, and vertical
bandwidth well beyond 1000 megacycles permit accurate
repetitive and single-shot displays to be observed and
photographed from fractional-nanosecond signals. An inter-
nal delay line in the vertical channel of the instrument
permits display of the leading edge of the signal triggering
the oscilloscope. Sweep delay control through 35 nano-
seconds permits viewing signals before and after the main
signal event.
The Type 519 incorporates two internal waveform gen-
erators. An adjustable repetition-rate fast-rise pulse gen-
erator and a fast-rise calibration-step generator supply
waveforms which can be used to check the calibration of the
oscilloscope itself, or to drive external devices. These wave-
form generators meet most requirements to complete a test
setup.
VERTICAL-DEFLECTION SYSTEM
Vertical Deflection Factor
With Type T519P-A CRT, less than 10 volts per cm. Exact
CRT deflection factor indicated on CRT face mask of each
instrument.
Passband
With Type T519P-A CRT, dc to 1000 megacycles minimum at
3-db down.
Risetime
With Type T519P-A CRT, less than 0.35 nanosecond *
Input Impedance
125 ohms.
* 1 nanosecond—=10°? seconds.
®
SECTION 1
CHARACTERISTICS
Maximum Allowable Input Power to Vertical
Channel
1.8 watts, corresponding to 15 volts de or rms.
Maximum Allowable Peak Signal Amplitude
+100 volts. Repeated pulses of higher voltage may dam-
age the 125-ohm signal termination resistor.
Internal Signal Delay
Approximately 45 nanoseconds, fixed.
Voltage Standing Wave Ratio
Nominally 1.25:1 to 1000 mc.
TRIGGER
Triggering Signal Sources
Internal from = applied signals, internal from the Rate Gen-
erator, internal from the Calibration-Step Generator, and
external from - trigger inputs.
External Triggering Signal Requirements
Pulse amplitude: 20 millivolts. Duration: 1 nanosecond
or longer. Maximum permissible external triggering signal:
+10 volts peak, higher with external attenuators. Repeti-
tion rate: to 1000 mc.
Internal Triggering Signal Requirements
Pulse amplitude: sufficient signal to produce a 2 trace-
width deflection on the screen (approximately 200 mv). Dur-
ation: 1 nanosecond or longer. Repetition rate: to 1000 mc.
Countdown
A sweep is obtained for each trigger signal at trigger signal
frequencies below the maximum sweep repetition rate. Trig-
gering circuits countdown for trigger signal frequencies
1-1

Characteristics—Type 519
higher than the maximum sweep repetition rate. Sine-wave
trigger requirements: 1 mc to 1000 mc, 20 mv peak-to-peak
external trigger input, or 200 mv peak-to-peak signal to verti-
cal input.
Pulse Amplitude or Sync
Single control adjusts pulse triggering level or high-fre-
quency sync. An additional control provides vernier sync.
Delay
Sweep-start delay over a range of 35 nanoseconds. Per-
mits waveform to be positioned horizontally within the
sweep, to display a selected time interval.
TIME BASE
Sweep Rates
Nine Ranges: 2, 5, 10, 20, 50, 100, 200, 500, and 1000 nano-
seconds per centimeter.
Accuracy
Typically within 2% of indicated rate on all ranges except
the 2-nanosecond range, which is within 3%. These specifi-
cations apply to the entire sweep except for the first 2 nano-
seconds or 2 mm (whichever is larger).
Single Sweeps
Normal or single sweeps selected by front-panel switch.
+ Trigger Output
Greater than 1-volt pulse into 50 ohms upon triggering.
Delayed + Gate
Greater than 1-volt gate into 50 ohms during sweep; delayed
with respect to + Trigger Output depending on the setting
of the sweep-delay control.
RATE GENERATOR
Risetime
Less than 0.8 nanosecond (0.5 nanosecond typical).
Pulse Repetition Rate
3 cps to 30 kc, continuously variable.
1-2
Pulse Duration
10 nanoseconds + or — 20% at the 50% amplitude points.
Output Impedance
50 ohms.
Amplitude
Approximately +15 volts.
CALIBRATION-STEP GENERATOR
Risetime
Approximately 0.1 nanosecond.
Repetition Rate
Adjustable from 400 to 850 step waveforms per second;
normally operated near reed-switch resonant frequency at
approximately 750 steps per second.
Output Impedance
125 ohms.
Amplitude
Into 125 ohms, 0 to 10 volts. Into 50 ohms through T50/T125
adapter, 0 to 1 volt. Voltages applied to both impedances
are continuously variable and calibrated. Uncalibrated volt-
ages up to 50 volts into 125 ohms.
Polarity
The ouput polarity can be selected by a front-panel switch.
CATHODE RAY TUBE
Type
T519P-A
Phosphors
Type P11 phosphor standard (recommended for single-shot
photographic recording at fastest sweep rate). Other phos-
phors available only on special request.
Usable Viewing Area
Two centimeters vertical, six centimeters horizontal.

Accelerating Voltage
24 kv.
Spot Diameter
0.004 inch (approximately 0.1 mm) at normal intensity.
Deflection
Electrostatic. Vertical deflection system is 125-ohm dis-
tributed-constant delay line. Conventional horizontal deflec-
tion plates.
CONSTRUCTION AND POWER REQUIREMENTS
Construction
Single-unit construction with light-weight aluminum-alloy
chassis and four-piece vinyl-finish cabinet. Side panels, top
and bottom panels are separately removable.
Ventilation
Filtered forced air with protective thermal cutout insures
safe operating temperatures.
Dimensions
Approximately 221%," high, 1434,” wide, and 251%,” long.
Characteristics—Type 519
Power Requirements
105 to 125 or 210 to 250 volts, 50 to 60 cycles, approxi-
mately 650 watts.
ACCESSORIES
Information on accessories for use with this instrument is
included at the rear of the mechanical parts list.
1-3

Operating Information—Type 519
INTENSITY
ASTIGMATISM SCALE ILLUM.
TYPE S19 OSCILLOSCOPE
SERIAL
TEKTRONIX, INC. PORTLAND, OREGON. U.S. A,
POSITIONING
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Fig. 2-1. Type 519 Oscilloscope front panel.

Introduction
The Type 519 Oscilloscope is a high speed laboratory
instrument designed for observing, measuring, and photo-
graphically recording phenomena in the nanosecond (milli-
microsecond) domain. However, before the instrument can
be used successfully, it is important for you to have an un-
derstanding of the operation of each control. This section
of the Instruction Manual is intended to help you acquire
this understanding. Much of the familiarity with the controls
will come only with actual use of the instrument. A brief
description of each of the front-panel controls follows. Front-
panel markings are shown in Fig. 2-1.
FUNCTION OF CONTROLS
CRT
FOCUS Used in conjuction with the ASTIGMATISM
control to focus the oscilloscope trace.
INTENSITY Adjusts the brightness of the trace.
ASTIGMATISM — Used in conjunction with the FOCUS con-
trol to obtain a round spot and a sharply
focused trace.
SCALE ILLUM. Adjusts the brightness of the graticule
markings.
Graticule A knurled knob located below the center
Control of the graticule permits graticule to be
moved down out of the viewing area.
TIME BASE
NANOSEC/CM _ Selects the desired time base.
DELAY Determines the delay of the start of the
sweep with respect to the trigger signal
input.
NORMAL-SINGLE Selects either normal or single-sweep
SWEEP operation.
RATE GENERATOR
CYCLES/SEC Used in conjunction with the MULTIPLIER
control to set the Rate Generator out-
put frequency.
SECTION 2
OPERATING
INFORMATION
MULTIPLIER Multiplier for the CYCLES/SEC control.
Should be set to OFF position when Rate
Generator is not being used.
CALIBRATION-STEP GENERATOR
RANGE Selects full-scale amplitude of the cali-
brated steps, a variable uncalibrated step
amplitude, or a standby condition. Should
be set to STANDBY when Calibration-Step
Generator is not being used.
VARIABLE Permits the step waveform to be preset to
an arbitrary desired amplitude up to about
50 volts into a 125-ohm load.
VOLTS Sets the output voltage of the calibration-
step waveform in the 10V and 1 V posi-
tions of the RANGE switch.
REED SWITCH:
DRIVE Adjusts the reed-switch magnetic excita-
tion for proper closures or permits single
reed operation.
FREQUENCY = Controls frequency of the reed-switch mag-
netic excitation to help minimize contact
bounce.
TRIGGER
PULSE AMPLI- = Selects triggering signal amplitude re-
TUDE OR SYNC * quired to operate triggering circuits, or ad-
justs synchronization.
VERNIER SYNC Used in conjunction with PULSE AMPLI-
TUDE OR SYNC control to synchronize the
sweep.
FUNCTION * Permits choice of triggered or synchronized
displays.
GAIN * Selects proper gain or attenuation for the
triggering signal.
TRIGGER Selects the triggering signal source and
SOURCE polarity.
* Also see TRIGGER OPERATION section of front-panel, Fig. 2-1.
2-1

Operating Information—Type 519
POSITIONING
VERTICAL Adjusts the vertical position of the trace.
AXIS ROTA- Aligns the trace parallel to the horizontal
TION graticule lines.
HORIZONTAL — Adjusts the horizontal position of the trace.
POWER
DIM ADJ. Used to adjust the brightness of pilot light
after 45-second warm-up period.
ON AC line switch.
PRELIMINARY INSTRUCTIONS
Cooling
A blower maintains safe operating temperature in the
Type 519 Oscilloscope by drawing air through a filter and
circulating it over the components. Therefore, the instru-
ment must be placed so that the air intake and cabinet
ventilating holes are not blocked. The air filter must be
kept clean to permit adequate air flow.
A thermal cutout switch disconnects the dc power if the
instrument becomes overheated. The pilot lamp will re-
turn to full brightness in the event that dc power is lost.
Brown-Yellow-Green
Lo
B
beats Black-White
117-VOLT OPERATION
Brown-Yellow-Green
Brown-Yellow-
Brown
Black-White
234-VOLT OPERATION
If this happens, check immediately for proper airflow into
the instrument. The blower continues to cool the interior
and reduces the time the thermal switch remains open. DC
power will be restored when the temperature drops to a
safe value.
Power Requirements
The regulated power supplies in the Type 519 Oscillo-
scope will operate with line voltages from 105 to 125 volts
(117 nominal) or from 210 to 250 volts (234 nominal). The
line voltage for which your instrument is wired at the
factory is indicated on a metal tag fastened to the rear
panel near the power receptacle. Transformer connections
may be changed for either 117- or 234-volt operation by
using the information given in Fig. 2-2. The power trans-
former is wound with two 117-volt primaries which are
connected in parallel for 117-volt operation and in series
for 234-volt operation. Since the blower motor is connected
across only one of the transformer primaries, no change in
the motor lead connections is required. When the trans-
former connections are changed, the voltage indicated on
the metal tag should be covered with another tag which
conforms to the new operating voltage.
For maximum dependability and long life, the line voltage
applied to the Type 519 Oscilloscope should be near the
voltage indicated on the metal tag located near the power
receptacle at the rear of the instrument. If the line voltage
exceeds the operating limits, or has a poor waveform (dis-
torted sine waves), unstable power-supply operation may
Fig. 2-2. Power transformer connections for operation of the Type 519 Oscilloscope at 117 or 234 volts.