Agilent Technologies 6571A, Service Manual

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18
Diagrams
Table 6-2. Signal Name Mnemonics
Mnemonic Description Mnemonic Description
A(0)-A(15)
Address lines
MSRQ
Microprocessor service request
AD (0)-AD(7) Address bus NDAC Not data accepted (GPIB)
AMB_SENSE
Ambient temperature sense
NEG_IMON
Negative current monitor
ANA(0)-ANA(7)
Analog signal readback bus
NRFD
Not ready or data (GPIB)
ATN Attention (GPIB) OV Overvoltage
BIAS_OK
±
15V bias supplies have stabilized
OV_CLR
Overvoltage clear
BOVPROG Buffered OV programming OVCMP Overvoltage comparator
BSTX
Buffered secondary transmit
OVP_BIAS
Overvoltage protection bias
cc
Constant current status
OVPROG
Overvoltage programming
CCPROG Constant current programming OVSCR Overvoltage SCR (crowbar)
cv
Constant voltage status
PCLR
Primary power clear
CVPROG
Constant voltage programming
PREF
Primary reference voltage (2.53V)
D(0)_D(7) Data lines PREF_2 Primary reference voltage (1.0V)
D101-D108
Data lines (GPIB)
PREN
Primary remote enable
DAV Data valid (GPIB) PRX Primary receive serial data
DFI Discrete fault indicator PTX Primary transmit serial data
DFI-EN
Discrete fault indicator enable
PWM_EN
Pulse width modulator enable
DPS Downprogramming shunt RAM Random access memory
DN_PGM
Down programming
RDY
Ready
DRIVE_A/B
FET drive signals
REN
Remote enable
EOI End or identify (GPIB) RI Remote inhibit
FAC_CAL
Factory calibration
ROM
Read only memory
FAN_PWM
Fan pulse width modulation
SPCLR
Secondary power clear
FPRX Front panel receive serial data RX Receive serial data
FPTX
Front panel transmit serial data
RxD
Receive serial data
FS
Fast sense
SA
Signature analysis
HSRQ GPIB service request SRQ Service request (GPIB)
IFC
Interface clear (GPIB)
SRX
Secondary receive serial data
IMON Current monitor STX Secondary transmit serial data
INH_CAL Inhibit calibration TxD Transmit serial data
IP
External current programming
UART
Universal asynchronous
Receive/transmit
IPROG
Current programming
VMON
Voltage monitor
ISEN
Current sense
vos
Voltage offset
ISRQ Interface service request VPROG Voltage programming
KO(0)-KO(5)
Keypad output data bus
WR
Write
KI(0)-KI(5)
Keypad input data bus