HP 3562A, Service Manual

Page: 275 / 570

C I RC U I T D E SC R I PTIONS
MOD E L 3562A
6-54
Internal Signal Descriptions, A6
ABORT
B LKDO N E
B LK F U L L
B LK R EADYF LG
B LK2FU LLF LG
B LK3FU LLFLG
CLRINTL
COU NTE RSE L
COU NTE RDTACKL
D M EANABLEL
F LASH
F R E E R U N
GAH2 l
Used to stop D igital Filter Assembly activity
Signal from start/stop controller to measu rement control state
machine to ind icate that a triggered measu rement is com plete
B lock f u l l . I nput to measurement control machine which
i n d icates that a measurement is complete
Set when the measu rement mode data blocks are complete
fo r both channels
Set when the auxi l iary data block 2 is f i l led
Set when the u nfi ltered auxi l iary data block is fil led
Clear interru pt. Clears the add ressed i nterrupt flag flip-flop
Cou nter select, enables U107
Data point counter data transm it acknowledge
Timing signal from measu rement control machine to start/stop
control and trigger control
Signal activated in the trigger LED control block each time a
trigger occ u rs
Used with T R I G G E R E D to sel ect the measu rement mode. If
T R I GG E R E D is set and FRE ERU N is clear, triggered mode is
selected. I f F R E E RUN is set and TRIGG E R E D is clear, freeru n
mode is selected. If both bits are clear, stream mode is selected.
Signal to data point cou nter i ndicati ng that a trigger has
" " Input
MARKER, MAR KERFlG
Set if a marker count has finished
MASKO-2, 1 3-1 5
Outputs from the interrupt mask register
MEAS U R I N G
Set when the measu rement is active. Used for contro l of the
front panel TRIGG ER I NG LE D
N OTREALTIME L
Signal to trigger L E D control indicati ng that measu rement is
not real time
N OTREALTIME F LG
I nd icates that data cannot be moved through the D FA fast
enough to prevent delaying further meas u rements .