List Of Tables

Number Title Page

1-1. Specifications 1-0

1-2. Plug-Ins for Model 140A Oscilloscope 1-2

5-1. Equipment Required for Tests and

Adjustments 5-0

5-2. Low-Voltage Adjustments 5-1

5-3. Condensed Adjustment Procedure . . . 5-4

Number Title Page

5-4. Troubleshooting the Low-Voltage Supply 5-5 5-5. Troubleshooting High-Voltage Supply,

No Voltage 5-7

5-6. Troubleshooting High-Voltage Supply,

Incorrect Voltage 5-8

6-1. Reference Designation Index 6-3

6-2. Replaceable Parts 6-10

Table 1-1. Specifications

PLUG-IN COMPARTMENTS

Upper Compartment, horizontal axis:

Accepts horizontal plug-ins, Models 1420 to 1424 or, if desired, amplifier plug-ins, Models 1400 to 1414. Plug-in operates directly into horizontal deflection plates in Model 140A.

Lower Compartment, vertical axis:

Accepts plug-in amplifiers, Models 1400 to

1414 or, if desired, horizontal plug-ins, Models 1420 to 1424. Plug-in operates directly into vertical deflection plates in Model 140A.

Combined:

Dividing shield can be removed; compartment accepts single large plug-in units. Models

1415 to 1419.

CATHODE-RAY TUBE

Type:

<!$ post-accelerator, 7.5-kv accelerating potential, aluminized P31 phosphor standard; for other phosphors, see OPTIONS.

Graticule:

10 x 10 cm parallax-free internal graticule, marked in centimeter squares; subdivisions of 2 mm on major horizontal and vertical axes.

Intensity Modulation:

Approximately +20 volt pulse will blank trace of normal intensity; terminals on rear panel.

BEAM FINDER

Pressing BEAM FINDER control brings trace on screen, regardless of setting of horizontal or vertical POSITION control.

GENERAL

Power Requirements:

115 or 230 volts ±10% AC, 50 to 60 cps, normally less than 285 watts (varies with plug-in used). Will provide 140 watts of regulated power to plug-ins.

Dimensions:

NOTES

DIMENSIONS IN INCHES ANO ICENT1 METERS) ® EIA RACK HEIGHT

FOR CABINET HEIGHT (INCLUDING FEET) ADD :

: TO EIA RACK HEIGHT

NOTES

DIMENSIONS IN INCHES ANO ICENT1 METERS) ® EIA RACK HEIGHT

FOR CABINET HEIGHT (INCLUDING FEET) ADD :

: TO EIA RACK HEIGHT

CALIBRATOR Type:

Line-frequency rectangular signal, approximately 0.5 jLtsec rise time.

Voltage:

Two outputs: 1 volt and 10 volts peak-to-peak, ±1% from 15°C to 35°C, ±3% 0°C to 55°C.

Weight:

37 lb net without plug-ins

Options:

02. CRT with internal graticule and P2

phosphor installed 07. CRT with internal graticule and P7

phosphor installed 11. CRT with internal graticule and Pll phosphor installed

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