HP 4145A Operation And Service Manual page 38

Model 4145A
SECTION III
3 ENTER Key:
This key is used to enter parameter values,
alphanumeric characters, special charac-
ters, and unit indicators displayed on the
Keyboard Input Line (see Figure 3-5) into
the internal display buffer. When this key is
pressed, data displayed on the Keyboard
Input Line is moved to the display field
indicated by the field pointer ( ,> and stored
in the display buffer. Data stored in the
display buffer by the ENTER key can be
recalled (redisplayed on the Keyboard Input
Line) by pressing the RECALL Key 19 Up
Q
to 60 characters can be entered in o the
buffer, but only 27 characters can be
displayed at one time. To display the rest
of the buffer contents, use the BACK key or
FORWARD key.
3 EXECUTE Key:
This key executes GET, SAVE, PRINT,
PLOT, PURGE, and REPACK commands,
and arithmetic expressions displayed on the
Keyboard Input Line.
Note : The PURGE and REPACK com-
mands are available only when the
USER FILE CATALOG is displayed.
3 CURSOR Control Keys : -'
These keys control the positioning of the
field pointer (b) and the long and short
cursors.
(They do not control the cursor on
the Keyboard Input Line.)
Field Pointer Control :
Pressing the 0 , c> , 0 , or G key
moves the field pointer (,) in the
indicated direction. The FAST key
cannot be used for field pointer control.
Long/Short Cursor Control :
Pressing the 0 , 0 , 0 , or 0 key
moves the cursor in the indicated
direction. Movement continues until the
key is released.
Two direction-keys can
be pressed simultaneously to move the
cursor diagonally. Pressing the FAST
key in conjunction with one or two of the
direction keys, causes the cursor to
move more rapidly.
@
1 MARKER Control Dial :
This dial controls the marker ( @ or *) on
the GRAPHICS PLOT page. Rotating the
dial clockwise moves the marker from the
sweep start point to the sweep stop point.
0
5 AUTO CAL KEY:
This key enables continuous auto-calibration
of the 4145A. The AUTO CAL function is
set to ON (key indicator lamp on) when the
instrument is turned on. Refer to paragraph
3-37 for details.
@, 8, @ DATA ENTRY Keys :
These keys are used to enter numeric
values, arithmetic operators, and
engineering units.
Data entered with these
keys is displayed on the CRT's Keyboard
Input Line and entered into the display
buffer by pressing the ENTER key 0 . An
arithmetic expression entered with these
keys is executed by pressing the EXECUTE
key.
@ Engineering Unit Keys :
Four engineering units are available-m
(milli, 10-S ), u (micro, 1O'6 ), n (nano, 10mg ),
and p (pica,
1 O-l2 )-for use with the
numeric keys @.
0 Arithmetic Operator and Function Keys :
Nine arithmetic operators and functions are
available-+, -,
*, /, 4-9 a, (,I, EEX
(scientific notation)--for use in arithmetic
calculations. Five additional operator and
functions are available with the alphabetic
(blue) keys : w (exponentiation), LOG,
LN (natural log), EXP (natural base), and
ABS (absolute). The SPACE key is also
included in this key group.
@ Numeric Keys :
These keys-0 through 9 and decimal
point-are used for entering measurement
parameter values and for making quick
arithmetic calculations.
Figure 3-2. Front Panel Features (Sheet 4 of 6).
3-5
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