2:9 Front Panel Programs - Keithley 706 Instruction Manual

This feature can be used to trigger the Model 706 into the
selected mode using another instrument.
3. CHANNEL READY-The CHANNEL READY output is a
BNC output connector that provides a negative going lTL
level pulse with a duration of greater than 10pec at the
completion of the programmed settling time. This features
can be used to inform another instrument (DMM, Source,
etc.) that the present channel settling time is completed.
4. ALARM/SERIAL IN-The ALARM/SERIAL IN connec-
tor has two functions. The alarm out function and the
serial in function. They are described as fokows:
ALARM-The alarm function outputs a negative going
TTL level pulse with a duration of greater than 10wec. This
'pulse appears once upon reaching the programmed alarm
time. The alarm time can be programmed by front panel
Program 7. When the alarm time is set to 00.00.00 the
pulse does not appear. The programmed alarm time is set
to 00.00.00 when power to the instrument has been
cycled. Refer to Table 2-3.
SERIAL IN-The serial in function is used in a daisy chain
configuration where the ALARM/SERIAL IN connector is
connected to the SERIAL OUT connector of another
Model 706. Refer to example 4 of paragraph 2.5.4.
5. SER. OUT-The SER. OUT connector is a BNC output
connector that provides a connection to another Model
706 for a daisy chain configuration. The SERIAL OUT con-
nector is applied to the ALARM/SERIAL IN connector of
another Model 706. Refer to example 4 of paragraph 2.5.4.
6. DIGITAL l/O-The DIGITAL I/O port consists of 16
digital input and output lines along with four lines that are
+ 5V and IEEE common. Eight of the I/O lines can be used
for inputs and eight can be used for outputs. The outputs
will drive one TTL load and the inputs are TTL compatible.
For more information concerning the digital I/O port refer
to paragraph 3.5.8 step 15.
7. IEEE-488 INTERFACE-The IEEE bus connector pro-
vides bus connection to the Model 706. The connector
mates with the Keithley Model 7008-3 and 7008-6 cables.
For more detailed information concerning the IEEE con-
nector refer to paragraph 3.3.
8. LINE FUSE-This is the line power fuse and it is rated
as specified in Table 5-2.
9. LINE RECEPTACLE-The line power receptacle mates
with a three wire line cord which provides connections to
line voltage. For correct line voltage selection refer to
paragraph 5.3.
2.9 FRONT PANEL PROGRAMS
This section contains instructions necessary for operating
the
15 internal proSCams of the Model 706. The programs are ac-
tivated by pressing the PRGM button along with the button
representing the appropriate program number. The programs
do a number of various tasks which are summarized in Table
2-17.
Program Notes
1.
2.
3.
4.
5.
6.
7.
8.
9.
Each program is entered by pressing the PRGM button
followed by the desired program number.
Pressing the PRGM button selects the program mode and
the following is displayed:
r--TzTj --
As you have noticed, the question mark is flashing. This is
prompting the operator to enter the desired program
number (refer to Table 2-17). After entering the program
number the Model 706 goes into the program selected.
Then the display prompts the operator to enter numerical
data. Numerical data varies with each program.
New programs may be entered without clearing a program
that is presently running. To do so, press the PRGM but-
ton followed by the desired program number.
Data is entered into the digit whose "C" segment (cursor)
is flashing by pressing the desired number button. The
"C" segment of a display is shown as follows:
1-G +fment
As each digit is entered, the cursor moves one place to the
right until the last digit on the right is reached. Then it is
cycled to the first digit on the left.
Only as many significant digits as necessary need to be
entered. The Model 706 will complete the constants with
trailing zeroes where necessary.
Invalid keys will be ignored. If an invalid key is pressed the
blinking "C" segment (cursor) remains at the current digit.
If an incorrect digit is entered, the complete constant must
be reentered. The new value may be entered by cycling
the display around to the beginning. To do this, repeatedly
press one of the number buttons.
If too many digits are entered, the display begins again at
the first digit on the left. All the digits in the constant must
then be entered again. This applies only to Programs 0,2,
3, 6 and 7.
Once all the digits of the desired constants are shown on
the display, the constant is entered into the program by
pressing the ENTER button. This applies only to Programs
0 through 7.
2-18