X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
1
1
6
6
R
R
E
E
V
V
E
E
Use the up or down arrow key to toggle the desired action and press "FUNC/ENTR". The external
oscillator parameters have now been saved to NVRAM and will be used immediately if the External
Oscillator has already been enabled via Keypad Function 07 or Serial Function F07. Otherwise they
will be used when the external oscillator is next enabled.
3-115 reserved
3-116 KEYPAD FUNCTION 16 - EMULATION MODE ENABLE
Use Keypad Function 16 to enable or disable the emulation mode. When the emulation mode is "off",
the Serial Port and the optional IEEE port respond to the "Mark III command set" as described in this
section and in Section XII under IEEE-488 FUNCTION DESCRIPTIONS. When the emulation mode is
"on", the Serial Port and the optional IEEE port respond to the "Mark II command set" as described in
this section under SERIAL EMULATION COMMANDS and in Section Twelve under IEEE-488
EMULATION COMMANDS. The emulation mode cannot be enabled or disabled via either
communications port.
The Mark II command set is composed of selected commands used on earlier TrueTime synchronized
clocks. Therefore, most Serial programs written for use with these earlier models may be used with the
current Mark III.
When the emulation is enabled or disabled, the Serial Port and the IEEE-488 port will both change
modes, even if they are waiting to complete a command. When emulation mode is turned on, or power
is applied when emulation is "on", the Serial Port will enter MODE C, continuous time once per second,
and the default format will be in effect. The IEEE-488 port, however, will wait for a command. When
emulation mode is turned off or power is applied to the unit when emulation is "off", the Serial port will
enter the F08 command and send time once per second. The IEEE-488 port will abort whatever
command is in progress and wait to receive another command.
When emulation is "on", the Serial Port acknowledges the commands C, T, F, and R. The IEEE-488
port acknowledges the commands T, and F. Note that the ADVANCED IEEE-488 OPTION Assembly
86-386 does not support the emulation of the older units.
The as-shipped default is "off". The default value on power-up will be that in use prior to power-down.
Press "FUNC/ENTR" then "1" "6". The display will show
Emulation mode
or
Emulation mode
off
on
Press the up- or down-arrow keys to toggle between "off" and "on". When the display shows the
desired choice, press "FUNC/ENTR" and the command set will change.
Summary of Contents for 151-600
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