Reference
3-46
370B User Manual
Unlike the Dot cursor and f Line cursor, the Window cursor can be used in Non
Store as well as Store mode, and can be displayed at any point on the screen. It is
typically used to check for the characteristics of a device under test to be within a
certain range. It can also used to measure the h
FE
on the curve of the collector
current vs. collector–emitter voltage characteristics of a transistor. When the
vertical side of the cursor is positioned between two adjacent curves, the h
FE
value is displayed in the b OR gm/DIV readout area.
The dot cursor is a high-intensity spot displayed on the characteristic curve. The
current and voltage values at the cursor position are given in the readout area.
The f Line cursor is a straight line that passes through the dot cursor position at a
slope that can be varied by the four Position control buttons.
When COLLECTOR is displayed on the horizontal axis, the CURSOR (f:1/grad)
readout indicates the resistance, while the CURSOR (f:intercept) readout
indicates the voltage value at which the f line cursor intercepts the horizontal
axis.
When BASE/EMITTER is displayed on the horizontal axis, the CURSOR
(f:1/grad) readout indicates the forward transfer admittance, while the CURSOR
(f:intercept) readout indicates the voltage value at which the f line cursor
intercepts the horizontal axis.
The f line cursor is useful for measuring the on-state resistance of a device and
for measuring the forward transfer admittance of FETs.
Text, consisting of letters, numbers, and symbols, can be displayed at the top of
the 370B CRT graticule. The text may be used to label characteristic curves with
identification information or to note measurement conditions. The text is stored
in mass storage along with the characteristic curve or setup information.
Entering Text Edit Mode. To enter the text edit mode, press the Position CURSOR
button while holding down the FAST/SHIFT button. (The FAST/SHIFT button
changes the function of the CURSOR button to TEXT, as noted in blue below
the button.) The “TEXT EDIT MODE” message is displayed at the bottom of the
graticule for about 5 seconds and the Text Edit cursor is displayed at the top,
indicating that the 370B is ready for text entry.
Entering and Editing Text. The character to be entered is selected with the Position
Control buttons (up, down) and the position at which it is displayed is selected
with the Position Control buttons (left, right). Only the functions of these four
buttons change in the edit mode; the functions of other buttons and knobs remain
the same.
A maximum of 24 text characters can be entered. Available text characters are:
space, A, B, ... ,Z, space, m, u, n, p, ., 0, 1, ..., 9, –, /, *, (, ), =
Text Editing
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General