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Tektronix 491 Service Manual

Tektronix 491
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Characteristic
Tube Type
Phosphor
Accelerating Potential
Graticule Type
Area
Illumination
Unblinking
TIME BASE
Characteristic
Performance Requirement Supplemental Information
,
RECORDER Output
≥4 mV per displayed division amplitude of
Rear panel connector
signal in LIN made.
Sweep Range
10
µs/div to 0.5 s/div
In a 1, 2, 5 sequence
Sweep Accuracy
±3% Measured within the center 8 divisions
VARIABLE Time/Div
≥2.5:1 An uncalibrated control provides continu-
ously variable sweep rates from 10 µs/div
to approximately 1.25 s/div.
Sweep Length
10.5 divisions ±0.2 div.
Sawtooth Output
70 mV to 90 mV (P-P)
Rear panel connector
TRIGGERING
Trigger Sensitivity
Internal
≤0.2 division, 20 Hz to 100 kHz
External
≤0.2 volt, 20 Hz to 100 kHz
Maximum Input Voltage
100 volts (DC + peak AC)
POWER REQUIREMENTS
Input Voltage
115-volt range
LOW- 90 to 110 VAC
MED- 104 to 126 VAC
HIGH- 112
to 136 VAC
Line voltage ranges provide regulated DC
230-volt range
LOW- 180 to 220 VAC
voltages, when line contains less than 2%
MED- 208 to 252 VAC
total harmonic distortion.
HIGH- 224 to 272 VAC
Line
Frequency
48 to 440 Hz
Input Power 55 watts maximum
CATHODE RAY TUBE
Information
T4910-7-1
P7
Approximately 3.75 kV
internal
8 divisions vertical by 10 divisions horizontal
Construction
Finish
Overall Dimensions [measured
at maximum points]
Each division equals 0.8 cm.
Variable edge lighting
Deflection type, DC coupled
MECHANICAL CHARACTERISTICS
Alluminum-alloy chassis, panel and cabinet
Glass laminate etched-circuit boards
Anodized panel, blue vinyl-coated cabinet
7¼” high, 12½" wide, 23½” long (includes
ENVIRONMENTAL
The following environmental test limits apply when tested
in accordance with the recommended test procedure. This
instrument will meet the electrical performance requirements
given in this section, following an environmental test.
panel cover and carrying handle)
CHARACTERISTICS
1-3

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Tektronix 491 Specifications

General IconGeneral
BrandTektronix
Model491
CategoryMeasuring Instruments
LanguageEnglish

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