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SERIES
9900
9000
SERIES
GAUSSMETERS
SECTION I V continued
Menu Operation/Gaussmeter
Programming
This mode of operation is called the "MASTER" mode and should not be
confused with the other mode of remote operation called the "SLAVE" mode
(Section V). In the "MASTER" mode the
gaussmeter is controlling
the
terminal, with the terminal's screen and keyboard duplicating the
gaussmeter's front panel display and pushbuttons. In the "SLAVE" mode,
the
gaussmeter is being controlled
by a remote device, typically a computer.
The "SLAVE" mode is accessible from either the IEEE-488 bus or the RS-
232 communications port, whereas the "MASTER" mode operates only from
the RS-232 port.
See Section VI for the electrical interface connections.
Only three keys are used on the terminal's keyboard; the ENTER key, the
CURSOR UP (T) key and the CURSOR DOWN (1) key. There is a one-to-one
functional correspondence between these keys and the front panel
pushbuttons. Thus any reference made in previous discussions to the up (1)
pushbutton, for instance, can be replaced by the CURSOR UP (T) on the
terminal.
Some terminals may not have cursor control keys or may not generate the
same ASCII codes as other terminals for the same function. Use the following
table to clarify these situations. It is recommended that the user refer to the
terminal's user manual for further information.
FUNCTION A S C I I P O S S I B L E KEY
ENTER
1
3
E N T E R , RETURN, CTRL-M
UP 1 1 / 2 6 C U R S O R UP, T, VTAB, CTRL-K, CTRL-Z
DOWN
1
0
C U R S O R DOWN, 1, LINEFEED, CTRL-J
The front panel display and pushbuttons operate in parallel with the terminal's
screen and key board. Whatever is presently appearing on the gaussmeter's
display will also appear on the terminal's screen though the format will be
slightly different. Whether a selection is made via the front panel pushbuttons
or the terminal's keyboard, both the terminal screen
and
the gaussmeter's
display will be updated. It is even possible to alternate between keyboard and
front panel pushbuttons to make selections.
NOTE: Since the COMMUNICATIONS FORMAT menu is accessible from the
remote terminal, care should be taken not to change the RS-232 parameters
without matching the new parameters on the terminal. Changes to the
parameters take effect immediately so it is possible to sever communications
in one keystroke. If this happens, the gaussmeter will have to be re-
programmed from the front panel or the terminal's parameters will have to be
modified to match the changes made.
NOTE: As discussed in Section III-H, peak readings are reset using the up (T)
and down (I) pushbuttons. Both are pressed to reset CHANNEL-3. To
accomplish a CHANNEL-3 peak reset from.the remote terminal, the
BACKSPACE KEY is used. (On some terminals, the RUBOUT or CURSOR
LEFT (4—) key may be used. The gaussmeter interprets an ASCII 08 as the
backspace key).
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