Stanford Research Systems SR844 User Manual page 107

ERRS?[i]
ERRE(?)[i,]{j}
LIAS?[i]
LIAE(?)[i,]{j}
Serial Poll Status: *STB?, *SRE
bit name
0 SCN No data is being stored.
1 IFC No command in progress.
2 ERR Enabled bit in Error status set.
3 LIA Enabled bit in LIA status set.
4 MAV Interface output buffer not empty.
5 ESB Enabled bit in Standard Event
status set.
6 SRQ Service Request has occurred.
7 –– unused
Standard Event Status: *ESR?, *ESE
bit name
0 RXQ Input queue overflows.
1 –– unused
2 TXQ Output queue overflows.
3 ––
4 EXE Command execution error occurs.
5 CMD Illegal command received.
6 URQ Any key–press or knob rotation.
7 PON Power–on.
4-30 Query the Error Status Byte. If i is included only bit i is queried.
4-30 ERREj sets the Error Status Enable Register to decimal value j (0–
255). ERREi,j sets bit i (0–7) to j (0,1). ERRE? queries the
entire register. ERRE?i queries bit i.
4-30 Query the LIA Status Register. If i is included only bit i is queried.
4-30 LIAEj sets the LIA Status Enable Register to decimal value j (0–
65535). LIAEi,j sets bit i (0–15) to j (0,1). LIAE? queries the
entire register. LIAE?i queries bit i.
set when...
set when...
Index of Commands
Error Status: ERRS?, ERRE
bit name
0 –– unused
1 BAK Battery backup failed.
2 RAM RAM memory test failed.
3 FPG FPGA test failed.
4 ROM ROM memory test failed.
5 GPB GPIB Fast Data Transfer aborted.
6 DSP DSP test failed.
7 MTH Internal math error occurred.
LIA Status: LIAS?, LIAE
bit name
0 ULK Reference unlocked.
1 FRQ Ext Ref frequency out of range.
2 –– unused
3 TRG Data storage triggered.
4 INP Signal Input overloads.
5 RSV IF amplifier overloads.
6 FLT Time constant filter overloads.
7 CHG Ref frequency changed by >1%.
8 CH1 CH1 display or front panel ovld.
9 CH2 CH2 display or front panel ovld.
10 OAX Aux input overflows.
11 UAX Aux input underflows.
SR844 RF Lock-In Amplifier
4-5
set when...
set when...