Eneral Description - Tektronix 511A-AD Instruction Manual

SECT ON

ENERAL DESCRIPTION

The Tektronix Type 511-A Cathode Ray Oscillo ­
scope is a wide range, portable instrument, making
possible the observation of a wide variety of electrical
waveshapes. t is primarily intended for laboratory and
shop use, in the development and testing of all types of
electronic equipment.
The Type 51 1-AD Oscilloscope is identical to the Type
511-A except that it includes a factory installed Type
l-AD-25 Delay Network,
HARA TERISTI S
Signals observable
1. Sine waves from 10 cycles to 10 m c .
2. Pulses of .1 microsecond to 1/50 sec.
Sweep Circuit
Hard tube type, either triggered or recurrent as de ­
sired.
Sweep Speeds
Continuously variable from .01 sec. per cm to .1 micro ­
second per cm.
Trigger Requirements
.5 to 50 V (Peak) sine wave or pulse of either polarity.
Pulse as short as .05 microsecond will trigger satis ­
factorily. A key connected between TR GGER NPUT
and GND. is suitable for triggering single sweeps.
Sweep Lag
CRT is unblanked and sweep is operating linearly in
less than .1 microsecond after receipt of an infinitely
sharp trigger pulse.
Sweep Magnification
Any desired 20% of the sweep can be spread over the
entire trace except for sweep speeds faster than .5
microsecond per cm.
External Sweep nput
DC coupled via 100 K potentiometer and sweep am ­
plifier.
Maximum deflection sensitivity 1.5 V per cm DC or
peak to peak AC. Band width, DC to 800 kc (3 db
down at 800 kc).
Vertical Deflection Circuit
Switch permits signal input connector on panel to be
connected to deflection plates directly, via capacitor
(RC = .l sec), via 1 amplifier stage, or via 2 amplifier
stages.
nput Attenuator
Frequency compensated RC type with attenuation
ratios of 2, 4, and 8.
Vertical Deflection Sensitivity
Without amplifier 27 V per cm maximum, 200 V per
cm minimum, DC or peak to peak AC.
1 Stage, 2.7 V per cm maximum, 40 V per cm mini ­
mum.
2 Stages, .27 V per cm maximum, 4 V per cm mini ­
mum.
(Sensitivity is reduced by a factor of 10 when probe
is used.)
In no case should the combined A
voltages exceed 600 V peak.
nput mpedance
1 meg shunted by 40 mmfd (±5%) for any setting of
the input selector and input attenuator.
With probe, 10 megohms shunted by 14 mmfd.
Vertical Amplifier Bandwidth
1 stage, down 3 db (Max) (from 1 m c response) at 5
cps and 10 m c .
2 stages, down 3 db (Max) (from 1 m c response) at 5
cps and 8 m c .
Vertical Amplifier Transient Response
Rise time, 1 stage .04 microsecond (10% to 90%)
2 stages .05 microsecond (10% to 90%)
Calibrating Voltage
Clipped sine wave of power line frequency. Six
ranges 0-.3, 0-1, 0-3, 0-10, 0-30, 0-100 volts peak to
peak. Accuracy for line voltages from 105 to 125 v. is
zt3% of full scale. A position on the S GNAL CAL ­
BRATE switch allows the use of an external calibrat ­
ing source when desired.
Waveforms available externally.
Sweep sawtooth, 20 volts peak.
Positive and negative gate, 40 V. peak, same dura ­
tion as sweep.
Connection to CRT Cathode
via .1 mfd capacitor. RC = . 0 12 sec.
Accelerating voltage on cathode ray tube, 3 KV.
Power Requirements.
50-60 cycles, 230 watts. (See Section V.)
Weight. 50 pounds.
Dimensions. 15½" high, 12½" wide, 21 ½" deep.
Finish. Panel, photo etched aluminum with black letters.
Cabinet, gray wrinkle.
FUNCTIONS OF CONTROLS AND
A brief explanation of the function of each control and
binding post is given on the next page. For a more de ­
tailed explanation consult Section
SE TION 1, PAGE 1
105-125 volts, or 210-250 volts,
BINDIN POSTS
, Circuit Description.
TYPE 511-A, 51 1-AD
and D input