Model 140A Section I
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SECTION I
GENERAL INFORMATION
1-1. DESCRIPTION. 1-5. OPTIONS.
1-2. The @ Model 140A (Figure 1-1) is ageneral 1-6. The Model 140A normally is supplied with a
purpose plug-in oscilloscope. The deflection ampli- type P31 aluminized phosphor CRT. The following
fiers are contained within the plug-in units, which options, however, are available:
operate directly into the cathode-ray tube. Thus
a. Option 02. P2 phosphor (general purpose) the characteristics of the oscilloscope are dependent
b. Option 07. P7 phosphor (long persistence) upon the plug-ins used. Presently available plug-ins
c. Option 11. P11 phosphor (fast writing rate) make possible high-sensitivity, wide bandwidth, and
single,- dual, or four-trace measurements, in com- 1-7. ASSOCIATED EQUIPMENT.
bination with normal, single, or delayed sweeps.
Double-size plug-ins also are available for special 1-8. Some of the plug-ins available for the Model
applications such as time domain reflectometry. 140A Oscilloscope are listed in Table 1-2. The
Model 140A normally is used with an amplifier
plug-in in the lower compartment and a sweep plug-
1-3. The Model 140A provides power for the plug- in in the upper compartment. The plug-in in the
ins, as well as line-frequency square-wave cali- lower compartment produces vertical deflection,
brating voltages of 10 volts and 1 volt peak-to-peak, and the plug-in in the upper compartment produces
which are available on the front panel of the Model horizontal deflection. All @ Model 1400-series
140A. The primary power switch and all CRT plug-ins can be used with the Model 140A Oscilloscope.
controls are on the Model 140A front panel, and the Plug-in model numbers are grouped according to
terminals and switch for Z-axis modulation are on function:
the rear panel. Models 1400 to 1414 . . Plug-ins normally used
............... for vertical deflection
1-4. The Model 140A uses an internal graticule Models 1415 to 1419. ..... Double or full sized
CRT which eliminates parallax error in observing ....................... plug-ins
the display. The CRT is equipped with a nonglare Models 1420 to 1424 . . Plug-ins normally used
safety face plate. .............. for horizontal deflection
Figure 1-1. Model 140A Oscilloscope with Model 1400A Amplifier
and Model 1420A Time Base Plug-In Units
01638-1 1-1 |
ACEC
