Tektronix 491 Maintenance Manual page 7

Characteristic
RECORDER Output
Sweep Range
Sweep Accuracy
VARIABLE Time/Div
Sweep Length
Sawtooth Output
Trigger Sensitivity
Internal
External
Maximum Input Voltage
Input Voltage
115-volt range
230-volt range
Frequency
Line
Input Power
Characteristic
Tube Type
Phosphor
Accelerating Potential
Graticule Type
Area
Illumination
U n b l i n k i n g
Construction
Finish
Overall Dimensions [measured
at maximum points]
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.
TIME BASE
Performance Requirement
≥4 mV per displayed division amplitude of
signal in LIN made.
µs/div to 0.5
10 s/div
± 3 %
≥ 2 . 5 : 1
10.5 divisions ±0.2 div.
70 mV to 90 mV (P-P)
TRIGGERING
≤ 0 . 2 division, 20 Hz to 100 kHz
≤ 0 . 2 volt, 20 Hz to 100 kHz
100 volts (DC + peak AC)
POWER REQUIREMENTS
LOW- 90 to 110 VAC
MED- 104 to 126 VAC
H I G H - 1 1 2 1 3 6 V A C
to
LOW- 180 to 220 VAC
MED- 208 to 252 VAC
HIGH- 224 to 272 VAC
48 to 440 Hz
55 watts maximum
CATHODE RAY TUBE
Information
T4910-7-1
P7
Approximately 3.75 kV
internal
8 divisions vertical by 10 divisions horizontal
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
7 ¼ " h i g h , 1 2 ½ " w i d e , 2 3 ½ " l o n g ( i n c l u d e s
CHARACTERISTICS
ENVIRONMENTAL
S u p p l e m e n t a l I n f o r m a t i o n
,
Rear panel connector
In a 1, 2, 5 sequence
Measured within the center 8 divisions
An uncalibrated control provides continu-
ously variable sweep rates from 10 µs/div
to approximately 1.25 s/div.
Rear panel connector
Line voltage ranges provide regulated DC
voltages, when line contains less than 2%
total harmonic distortion.
panel cover and carrying handle)
1-3