Stanford Research Systems SR830, Manual

Page: 10 / 177

SR830 DSP Lock-In Amplifier
1-9
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 usage
0 RSRV/INPT Set when on RESERVE or INPUT overload
1 FILTR Set when on FILTR overload
2 OUTPT Set when on OUTPT overload
3 UNLK Set when on reference unlock
4 RANGE Set when detection freq crosses 200 Hz
5 TC Set when time constant is changed
6 TRIG Set when unit is triggered
7 Unused
ERROR STATUS BYTE (5-23)
bit name usage
0 Unused
1 Backup Error Set when battery backup fails
2 RAM Error Set when RAM Memory test finds an error
3 Unused
4 ROM Error Set when ROM Memory test finds an error
5 GPIB Error Set when GPIB binary data transfer aborts
6 DSP Error Set when DSP test finds an error
7 Math Error Set when an internal math error occurs
STATUS BYTE DEFINITIONS