Agilent Technologies 6541A, Service Manual

Page: 138 / 179

138 Diagrams
Table 6-1. Signal Name Descriptions
Signal Name Description
A(0)-A(15) Address lines
AD(0)-AD(7) Address/Data bus
ANA(0)-ANA(7) Analog Signal read back bus
ATN Attention (GPIB)
BOVPROG Buffered OV programming
BSTX Buffered secondary transmit
CC Constant Current status
CCPROG Constant current programming
CV Constant voltage status
CVPROG Constant voltage programming
D(0)-D(7) Data lines
D101-D108 Data lines (GPIB)
DAV Data valid (GPIB)
DFI Discrete fault indicator
DFI_EN Discrete fault indicator enable
DP Down programming
EOI End or identify (GPIB)
FAN PWM Fan pulse with modulation
FPRX Front panel receive serial data
FPTX Front panel transmit serial data
GCL Gross current limit
GPIB* GPIB chip select
HSRQ GPIB service request
IFC Interface clear (GPIB)
IMON Current monitor
IPROG Current programming
ISRQ Interface service request
KO(0)-KO(5) Keypad output data bus
KI(0)-KI(5) Keypad input data bus
MSRQ Microprocessor service request
NDAC Not data accepted (GPIB)
NEG IMON Negative current monitor
NRFD Not ready for data (GPIB)
OVCMP Overvolage comparator
OVP BIAS Overvoltage protection bias
OVPROG Overvoltage programming
OVSCR Overvoltage SCR (crowbar)
OUT INB Inboard side of current monitoring resistor (power lead)
PCLR Primary power clear
PREN Primary remote enable
PRX Primary receive serial data
PTX Primary transmit serial data
RAM* Random access memory chip select
RD* Read
RDY Ready
REN Remote enable
RI Remote inhibit
RMINB Inboard side of monitor resistor (sense lead)
RMOUTB Outboard side of monitor resistor (sense lead)