Stanford Research Systems SR844, User Manual

Page: 107 / 246

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