Tektronix 507, Инструкция по эксплуатации

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GENERAL DESCRIPTION
The Tektronix Type 507 Oscilloscope is a specialized instrument
designed primarily for high-voltage surge testing as applied to
power transformers, high-voltage insulators, lighting arrestors and
allied components, and their associated design and acceptance
tests.
The use of a 24-kv accelerating potential on a new type cathode
ray tube permits photographic recording of single sweeps at the
maximum writing-rate permitted by the vertical deflection and
sweep circuits. The vertical deflection system provides a risetime
of approximately 5 millimicroseconds and a sensitivity of approx­
imately 50 v/cm. An external length of delay cable can be inserted
into the vertical-input signal circuit to permit viewing of the lead­
ing edge of the waveform which triggers the sweep. Time markers
are available for convenient calibration of the sweep.
The Type 507 consists of two units, indicator and power supply,
mounted on a Scope-Mobile, thus making a convient mobile unit.
If desired, the units may be lifted off the Scope-Mobile for bench
use.
VERTICAL DEFLECTION SYSTEM
Transient Response
Risetime between 10-percent and 90-percent
amplitude points is about 5 millimicroseconds
(.005 microseconds). A passive damping network
inserted in the deflection leads is adjusted for
optimum transient response without overshoot
or ringing.
The maximum vertical sensitivity with a Type
T507P cathode-ray tube operated at 24-kv ac­
celerating is 50 v/cm.
Attenuator
A step attenuator with a characteristic imped­
ance of 72 ohms is provided in the vertical-input
signal circuit.
The attenuator is composed of
ten equal resistors of 7.2 ohms each, mounted
on a tap switch. The percentage of input signal
applied to the deflection plates can be selected
by the tap switch from 10 percent to 100 per­
cent in 10-percent steps.
Signal Mode
A three-position switch reverses the deflection-
plate polarity; the center position of the switch
is used in conjunction with a trigger-selector
switch to apply markers for photographing time
references.
Positioning Switch
The Type 507 has a seven-step vertical-posi­
tion switch with 50-volt steps of —150 v, —100 v,
—50 v, 0, + 5 0 v, +100 v and +150 v. A sep­
arate two-position switch selects either 50-volt
steps or continuously variable adjustment.
External Voltmeter Connections
Terminals are provided for a high-impedance
(50000/v) dc voltmeter, permitting vertical cali­
bration when using the variable positioning.
GENERAL DESCRIPTION — TYPE 5 0 7
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