Stanford Research Systems SR844, Руководство пользователя

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Overview 3-3
SR844 RF Lock-In Amplifier
Overview
CH1 Display CH2 Display Reference Display
Signal In CH1 Out CH2 Out Ref In Ref Out
Power
The power switch is on the rear panel. The SR844 is turned on by pushing the switch up.
The serial number (5 digits) is shown on the CH1 and CH2 displays and the
REFERENCE display shows the firmware version. The following internal tests are
performed.
DATA Performs a read/write test to the processor RAM.
BATT
The nonvolatile backup memory is tested. Instrument settings are stored in
nonvolatile memory and are retained when the power is turned off.
PROG Checks the processor ROM.
DSP Checks the digital signal processor (DSP).
RCAL
If the backup memory check passes, then the instrument returns to the settings
in effect when the power was last turned off (
RCAL USER is displayed). If
there is a memory error, then the stored settings are lost and the factory preset
values are used (
RCAL STD )
Reset
The SR844 may be set to the factory preset settings at any time by pressing Shift–Recall
(Shift
then
Recall)
.
To completely reset the unit, hold down the Setup key while the power is turned on. The
unit will ignore previous setups and use the factory preset settings.
50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
Hi – Z
50
Ω
INTERNAL
EXTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω
+10dBm
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Cal
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – CAL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offst%
REFERENCE
OVLD
Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
Offset
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
CAL
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
CAL
CAL
SCAN MODE
SCAN DONE
ERROR XY READY
R[dBm]
θ
CAL/LOCK
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
15 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
Ratio
TRIG
SR844 FP 96h 6
9/5/96 RR
OVLD CAL
OVERFLOW
OVLD
SIGNAL
IN
0 dBm MIN
Shift
AUTO
I. F.
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
PRECISE FREQ
CLEAR ALL
STORE R[dBm]
θ
ERROR
DIAG FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CAL STEP
SETTLE...
50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
10 k
Ω
40 pF
50
Ω
EXTERNAL
INTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω ,
1 Vpp NOM
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Rel
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – REL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offs %
REFERENCE
OVLD
XY Offs Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
XY Offs R Offs
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
Rel
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
REL
SCAN MODE
SCAN DONE XY READY
R[dBm]
θ
REL MODE
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
30 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
TRIG
SR844 FP 97A
1/21/97 RR
OVLD
OVERFLOW
OVLD
SIGNAL
IN
0.7 Vpp / 0 dBm MIN
Shift
AUTO
PRECISE FREQ
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
CLEAR ALL
STORE R[dBm]
θ
FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CLEAR ONE
SETTLE...
I. F.
CH2 RATIO
+13dBm
50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
10 k
Ω
40 pF
50
Ω
EXTERNAL
INTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω ,
1 Vpp NOM
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Rel
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – REL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offs %
REFERENCE
OVLD
XY Offs Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
XY Offs R Offs
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
REL
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
REL
SCAN MODE
SCAN DONE XY READY
R[dBm]
θ
REL MODE
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
30 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
TRIG
SR844 FP 97C
3/4/97 RR
OVLD
OVERFLOW
OVLD
SIGNAL
IN
0.7 Vpp / 0 dBm MIN
Shift
AUTO
PRECISE FREQ
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
CLEAR ALL
STORE R[dBm]
θ
FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CLEAR ONE
SETTLE...
I. F.
CH2 RATIO
+13dBm
2 F
2 F
50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
10 k
Ω
40 pF
50
Ω
EXTERNAL
INTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω ,
1 Vpp NOM
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Rel
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – REL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offs %
REFERENCE
OVLD
XY Offs Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
XY Offs R Offs
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
REL
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
REL
SCAN MODE
SCAN DONE XY READY
R[dBm]
θ
REL MODE
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
30 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
TRIG
SR844 FP 97D
4/17/97 RR
OVLD
OVERFLOW
OVLD
SIGNAL
IN
0.7 Vpp / 0 dBm MIN
Shift
AUTO
PRECISE FREQ
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
CLEAR ALL
STORE R[dBm]
θ
FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CLEAR ONE
SETTLE...
I. F.
CH2 RATIO
+13dBm
2 F 50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
Hi – Z
50
Ω
INTERNAL
EXTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω
+10dBm
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Cal
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – CAL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offst%
REFERENCE
OVLD
Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
Offset
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
CAL
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
CAL
CAL
SCAN MODE
SCAN DONE
ERROR XY READY
R[dBm]
θ
CAL/LOCK
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
15 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
Ratio
TRIG
SR844 FP 96h 6
9/5/96 RR
OVLD CAL
OVERFLOW
OVLD
SIGNAL
IN
0 dBm MIN
Shift
AUTO
I. F.
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
PRECISE FREQ
CLEAR ALL
STORE R[dBm]
θ
ERROR
DIAG FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CAL STEP
SETTLE...
50
Ω
RF OVLD
25 kHz –
200 MHz
1
FILTER OVLD
3
x1
x10
x100
µ
s
ms
s
ks
18
12
6 dB/Octave
24 AUTO
IF OVLD
R [dBm]
R [V]
X
X noise
AUX IN 1 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
X
OFFSET
CH1 OUTPUT
ERROR
ACTIVE
SRQ
REMOTE BAUD
ADDRESS
PARITY
QUEUE
GPIB/RS232
10 k
Ω
40 pF
50
Ω
EXTERNAL
INTERNAL
CH2 OUTPUT REF IN REF OUT
50
Ω ,
1 Vpp NOM
Y noise [V]
θ
Y
Y noise [dBm]
AUX IN 2 AUX IN 1
AUX IN 2 x10
x100 DISPLAY
Y
OFFSET
<20mA <20mA
Sig
Z – In
SIGNAL INPUT
TIME CONSTANT
On/Off Auto Modify
Display Ratio Expand Output
STANFORD RESEARCH SYSTEMS
CHANNEL ONE
Model SR844 RF Lock-In Amplifier
CHANNEL TWO
On/Off Auto Modify
Display Expand Output
Local Setup
Store
X Y
Scan
Set
Rel
Mode
Save Recall
+90˚ Zero
Ref
Z – In
Source
SETUP
SCAN – REL
INTERFACE
SENSITIVITY
kHz
V
T.C.
MHz
DEG
PHASE AxOut1 FREQ AxOut2
Offs %
REFERENCE
OVLD
XY Offs Offset
Ratio V
mV
DEG
µ
V dBm
nV
pV
Expand
OVLD
XY Offs R Offs
V
mV
µ
V dBm
nV
pV
Expand
< 1 V rms
5 V DC+AC
MAX
UNDERFLOW
REL
1m
10m
100m
1
-127
-107
-87
-67
Start/
Step
REL
SCAN MODE
SCAN DONE XY READY
R[dBm]
θ
REL MODE
UNLOCK
OUT OF RANGE
Freq
Phase
AuxOut
FULL SCALE V [rms]
1 M
Ω
30 pF
dBm
100n
1µ
10µ
100µ
-47
-27
-7
+13
START STOP
Ratio
I. F.
TRIG
SR844 FP 97D
4/17/97 RR
OVLD
OVERFLOW
OVLD
SIGNAL
IN
0.7 Vpp / 0 dBm MIN
Shift
AUTO
PRECISE FREQ
– 90˚ OFF
PRESET
AUTO
Shift
NO FILTER
LOW NOISE
NORMAL
Close
Resrv
HIGH
AUTO
300m
30m
3m
300µ
300n
3µ
30µ
CLEAR ALL
STORE R[dBm]
θ
FREQ
LOW NOISE
NORMAL AUTO
HIGH
AUTO
WIDE RESERVE
CLEAR ONE
SETTLE...
I. F.
CH2 RATIO
+13dBm
2 F