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SINGLE-Actuation
of the SINGLE button selects the
single scan mode and turns on the single LED. The single
scan mode allows the user to scan through the programm-
ed channels at the programmed interval rate, one time.
The single scan mode is initiated upon the actuation of the
START/STOP
button or upon receiving the appropriate
external trigger pulse.
Pressing the START/STOP
button during a single scan se-
quence stops the scan at the presently displayed channel.
To
continue
the
scan sequence
simply
press the
START/STOP
button.
--
START/STOP-The
START/STOP
button is an alter-
nate action control that has three functions.
The three
functions are the start function, stop function and the step
scan mode. These functions are described as follows:
A. START-The
start function of the START/STOP
but-
ton initiates the selected scan mode. When all the
parameters (interval time, first and last channels, scan
mode, etc.1 of a multi-channel configuration
have been
programmed and the user is ready to scan the chan-
nels, press the START/STOP
button to initiate the
scan
sequence.
During
the
scan
sequence
the
START/STOP
LED is activated.
B. STOP-The
stop function of the START/STOP
button
stops the previously initiated scan sequence. That is,
pressing the START/STOP
button during a scan se-
quence stops the sequence at the presently displayed
channel and turns off the START/STOP
LED. The
STOP function is active only during a scan sequence.
C. STEP-The
step scan mode allows the user to manual-
ly step through the programmed channels. The step
scan mode is selected by pressing the channel button,
programming
the
interval
rate and pressing
the
START/STOP
button. When the interval rate has been
programmed and the user is ready to manually scan the
channels, press the START/STOP
button to scan one
-
~~
channel.
Upon initiating the step scan mode the START/STOP
LED turns on, the presently displayed channel is closed
for the programmed interval rate, the channel is then
opened and the START/STOP
LED turns off. At this
point the Model 706 advances to the next channel and
then stops.
To scan the next channel press the START/STOP
but-
ton and the Model 706 repeats the same sequence with
the presently displayed channel.
7 .CLOCK-The
CLOCK group of buttons consist of the
TIME and DATE buttons. The clock (time and date) con-
tinues to run after the instrument
is powered down
because the clock circuitry is backed up by battery BTlOl .
The two buttons are described as follows:
TIME-The
TIME button selects for display the 24 hour
time clock. The format showing 2:45 pm is as follows:
~W5.UUl
The time can be set by pressing the TIME button, entering
the appropriate time onto the display and then pressing the
ENTER button. Note that the time 28:00:00 to 33:59:59
can be entered. It is invalid but it can be entered.
DATE-The
DATE button
selects the date mode for
disolav. The date disolav has two formats. The formats
showing June 17th are a's follows:
American Date Format /I
'
International Date Format 1
I-
/ 7 D b
The formats are selected by front panel Program 1. Refer
to paragraph 2-9 for more information
concerning front
panel programs. The date can be set by pressing the DATE
button, entering the appropriate date onto the display and
then pressing ENTER. Refer to paragraph 2.6.
8. PRGM-The
PRGM button
when
pressed shows
a
9.
display that prompts the user to select one of the 15 front
panel programs.
Refer to paragraph 2.9 for complete
details and examples of the front panel programs.
IEEE Indicators-The
IEEE bus indicators
(TALK,
LISTEN and REMOTE) identify the present status of the
IEEE-488 bus. The indicators are described as follows:
TALK-The
TALK LED when lit indicates that the Model
706 is in the talk mode. The Model 706 does not have to
be in the remote mode for it to be in the talk mode.
LISTEN-The
LISTEN LED when lit indicates that the
Model 706 is in the listen mode. The Model 706 must also
.be in the remote mode for it to be in the listen mode.
REMOTE-The
REMOTE LED when lit indicates that the
Model 706 is in the remote mode.
2.6 DETAILED
REAR PANEL DESCRIPTION
1. CARD SLOTS-Each
card slot on the Model 706 rear
panel can accomodate one scanner card. There are a total
of 10 card slots. That is, the Model 706 can accomodate 10
scanner cards. The Model 706 with 10 scanner cards has
up to 100 2-pole channels. Refer to paragraph 2.2.2 for in-
structions on how to remove or install the various scanner
cards.
2. EXT. TRIGGER-The
external trigger is a BNC connector
that initiates the selected scan mode (single, step or con-
tinuous) in the same manner as the START/STOP
button.
The input trigger pulse must be a negative going lTL level
pulse with a minimum duration of met.
The selected scan
mode is initiated upon the negative transition of the pulse.
2-17
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