Stanford Research Systems SR810 Manual page 12

SR810 DSP Lock In-Amplifier
STATUS BYTE DEFINITIONS
SERIAL POLL STATUS BYTE (5-21)
bit name usage
0 SCN No data is being acquired
1 IFC No command execution in
progress
2 ERR Unmasked bit in error status
byte set
3 LIA Unmasked bit in LIA status
byte set
4 MAV The interface output buffer is
non-empty
5 ESB Unmasked bit in standard
status byte set
6 SRQ SRQ (service request) has
occurred
7 Unused
STANDARD EVENT STATUS BYTE (5-22)
bit name usage
0 INP Set on input queue overflow
1 Unused
2 QRY Set on output queue overflow
3 Unused
4 EXE Set when command execution
error occurs
5 CMD Set when an illegal command
is received
6 URQ Set by any key press or knob
rotation
7 PON Set by power-on
LIA STATUS BYTE (5-23)
bit name
0 RSRV/INPT Set when on RESERVE or
1 FILTR
2 OUTPT
3 UNLK
4 RANGE
5 TC
6 TRIG
7 Unused
ERROR STATUS BYTE (5-23)
bit name
0 Unused
1 Backup Error Set when battery backup fails
2 RAM Error
3 Unused
4 ROM Error
5 GPIB Error
6 DSP Error
7 Math Error
1-10
usage
INPUT overload
Set when on FILTR overload
Set when on OUTPT overload
Set when on reference unlock
Set when detection
crosses 200 Hz
Set when time constant is
changed
Set when unit is triggered
usage
Set when RAM Memory test
finds an error
Set when ROM Memory test
finds an error
Set when GPIB binary data
transfer aborts
Set when DSP test finds an
error
Set when an internal math
error occurs
freq