Keithley 6487 Reference Manual page 275

C-12 DDC Emulation Commands
Figure C-1
U0 machine status word
4 8 7 A B
PREFIX
DISPLAY INTENSITY
0 = Normal*
1 = Dim (Characters)
2 = Off
READING SOURCE
0 = Picoammeter*
1 = One buffer reading
2 = All buffer readings
3 = Max. buffer reading
4 = Min. buffer reading
ZERO CHECK
0 = Disabled*
1 = Enabled
V/I OHMS
0 = Disabled*
1 = Enabled
DATA FORMAT
0 = Rdg with prefix (ASCII)*
1 = Rdg without prefix (ASCII)
2 = Rdg, buffer location with prefix
3 = Rdg, buffer location without prefix
4 = Binary rdg, byte reversed
5 = Binary rdg, normal byte order
HIT BUTTON
18 = COMM
01 = CONFIG
02 = I | Ω 19 = DISP
20 = TRIG
03 = MATH
21 = LIMIT
04 = FILT
22 = DIGITS
05 = ZCHK
23 = RATE
06 = REL
24 = Cursor Left
07 = OPER
26 = SAVE
08 = SOURCE Up
27 = SETUP
11 = RANGE Up
28 = STORE
12 = AUTO
29 = RECALL
13 = RANGE Down
30 = AZERO
14 = ENTER
31 = DAMP
15 = Cursor Right
32 = EXIT
16 = SOURCE Down
17 = MENU
Status Word
C F G H J K
SELF TEST
0 = No error*
1 = ROM error
EOI, HOLD-OFF
0 = EOI & hold-off*
1 = No EOI, hold-off
2 = EOI, no hold-off
3 = No EOI, no hold-off
*Default settings
**Add up values for multiple SRQ conditions
M N O P R S
OPERATE
0 = Off*
1 = On
FILTERS
0 = Both off
1 = A off, D on
2 = A on, D off
3 = Both on*
RANGE
0 = Auto Off
1 = Auto On*
1 = 2nA
2 = 20nA
3 = 200nA
4 = 2μA
5 = 20μA
6 = 200μA
7 = 2mA
8 = 20mA
DATA STORE SIZE
000 = Disabled*
nnn = 001 to 512 (size)
SRQ MASK**
000 = SRQ Disabled*
001 = Reading Overflow
002 = Data Store Full
004 = Data Store 1/2 Full
008 = Reading Done
016 = Ready
032 = Error
128 = V-source Error
Model 6487 Reference Manual
T V Y Z c
CAL LOCK
0 = Locked*
1 = Unlocked
RELATIVE
0 = Off*
1 = On
TERMINATOR
0 = CR LF*
1 = LF CR
2 = CR
3 = LF
4 = None
V-SOURCE
00 = 50V rg, 25μA lim
01 = 50V rg, 2.5mA lim*
10 = 500V rg, 25μA lim
11 = 500V rg, 2.5mA lim
TRIGGER
0 = Continuous on Talk
1 = One-shot on Talk
2 = Continuous on Get
INTEGRATION
3 = One-shot on Get
0 = Fast 4 = Continuous on "X"
1 = Line cycle* 5 = One-shot on "X"
6 = Continuous on Ext Trig*
7 = One-shot on Ext Trig
8 = Contiuous on Operate
9 = One-shot on Operate