NUT 012 . Ed. 6
June 2010
User s manual
Model 1120
1pS Time Interval Meter
Two Channels (Start, Stop),
< 1 ps one-shot resolution,
< 10 ps rms jitter,
± 1s time measurement range,
Rack 19", 1U,
Ethernet interface.
Total sheets: 36
1. Model 1120 - 1pS Time Interval Counter
CONTENT
1.
GENERAL INFORMATION...................................................................................................................................5
1.1. POWER INSTALLATION..........................................................................................................................................6
1.2. OPERATING TEMPERATURE ..................................................................................................................................6
1.3. RACK MOUNTING INFORMATION ..........................................................................................................................6
1.4. SELF-TEST.............................................................................................................................................................6
2. SPECIFICATIONS....................................................................................................................................................7
3. OPERATING INFORMATION..............................................................................................................................9
3.1. PRINCIPLE:............................................................................................................................................................9
3.1.1. block diagram..............................................................................................................................................9
3.1.2. Time interval mode......................................................................................................................................9
3.1.3. Event mode.................................................................................................................................................10
3.1.4. Auto-calibration.........................................................................................................................................10
3.1.5. 10 MHz Time base.....................................................................................................................................10
3.1.6. Arming mode..............................................................................................................................................11
3.2. FRONT PANEL OPERATION ..................................................................................................................................12
3.2.1. Interface.....................................................................................................................................................12
3.2.2. Display menu .............................................................................................................................................13
3.2.3. IP adress ....................................................................................................................................................15
3.2.4. Default value..............................................................................................................................................16
3.3. REAR PANEL OPÉRATION ....................................................................................................................................16
4. CONNECTING TO THE INSTRUMENT VIA ETHERNET...........................................................................17
4.1. COMMAND STRUCTURE ......................................................................................................................................17
*IDN?.........................................................................................................................................................................17
ARM............................................................................................................................................................................17
CAL.............................................................................................................................................................................18
COUNT.......................................................................................................................................................................18
DELAY........................................................................................................................................................................18
DFORMAT.................................................................................................................................................................19
JITTER .......................................................................................................................................................................19
LEVEL........................................................................................................................................................................20
MODE ........................................................................................................................................................................20
POL ............................................................................................................................................................................21
RESULTS....................................................................................................................................................................22
RUN............................................................................................................................................................................23
SAMPLES...................................................................................................................................................................23
STAT...........................................................................................................................................................................24
STOP ..........................................................................................................................................................................25
TRIG...........................................................................................................................................................................25
4.2. REMOTE CONTROLE VIA INTERNET (WEB PAGE) ................................................................................................26
4.2.1. Results web page........................................................................................................................................26
4.2.2. Set up web page .........................................................................................................................................27
4.2.3. Status web page .........................................................................................................................................28
4.3. REMOTE CONTRÔLE VIA ETHERNET ...................................................................................................................28
5. OPERATION EXAMPLES....................................................................................................................................29
5.1. EXAMPLE 1 .........................................................................................................................................................29
5.2. EXAMPLE N°2 .....................................................................................................................................................30
6. ANNEXE : OPTION 1 OPTICAL MESSAGE....................................................................................................31
6.1. FRONT PANEL OPERATION ..................................................................................................................................31
6.1.1. Display menu .............................................................................................................................................31
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Model 1120 - 1pS Time Interval Counter
6.1.2.
6.1.3. Command structure ...................................................................................................................................35
STAT...........................................................................................................................................................................35
SYNC ..........................................................................................................................................................................36
TRIG...........................................................................................................................................................................36
IP adress ....................................................................................................................................................34
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1. Model 1120 - 1pS Time Interval Counter
EDITION
Ed. Date Description
1 4 18/01/2011 Creation
5 12/12/2008 Update the document to correct some bugs
6 08/06/2010 Command STAT SCAN
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Model 1120 - 1pS Time Interval Counter
1. GENERAL INFORMATION
The BNC 1120
The single-shot resolution and low jitter of the instrument make it the ideal for many test and
measure application.
Time intervals are measured with 1 ps resolution. Frequency and events are measured up to
10 MHz
Trigger level and slope are adjustable on each input. The instrument uses a linear interpolation
technique and an internal calibration to obtain very high accuracy.
All the BNC 1120 parameters may be local controlled (over the front panel keys and LCD
display) and remote controlled via an Ethernet interface.
1pS Time Interval Counter measures time interval, frequency and events.
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Instrument Option:
Option 1:
In timing system mode the module could be triggered by BNC 575 Digital Delay and
Pulse Generator via an optical signal.
Technical support
For more information about operating the BNC 1120, send an email to
info@berkeleynucleonics.com.
Package contents
The box you receive should contain the following:
BNC 1120 instrument,
User s manual,
Power cord,
CD contains pdf user manual.
Optical triggered,
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Model 1120 - 1pS Time Interval Counter
1.1. Power installation
Power source
The BNC 1120 can be operated from 110 VAC to 220 VAC nominal supply source.
The maximum power consumption of the BNC 1120 is 45 W.
Power cord
The BNC 1120 comes with a removable power cord for European usage. It has a three contact
plug for connection to both the power source and protective ground.
1.2. Operating temperature
The instrument can be operated where the ambient air temperature is 0°C to 35°C and can be
stored in ambient temperature from -10°C to +60°C.
The BNC 1120 is cooled by air circulation. To prevent instrument damage a clearance of 2 inches
on the side and 1 inch on the rear must be maintained for proper cooling.
1.3. Rack mounting information
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The BNC 1120 will fit a 19 inch rack.
1.4. Self-test
The BNC 1120 is automatically tested after power on (power supply and temperature).
If the power supply is not ok, the BNC 1120 indicate power failure.
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Model 1120 - 1pS Time Interval Counter
2. SPECIFICATIONS
Inputs start or stop
Threshold -5 to +5 V
Slope Rising or falling edge
Input gate
Threshold +1.5 V (fixed)
Trigger rate 0 to 20 KHz
Time interval
Range -1 to + 1 second
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Trigger rate 0 to 20 kHz
Resolution < 1ps, single shot
Error < 250 ps + time interval x 10
RMS jitter 10 ps
Arming mode On start, on stop, on gate
Event counting
Range 0 to 10 000 000
Count rate 0 to 10 MHz
Gate Internal 1 s, external on input gate
System
Calibration Internal
Functions Time interval, event counting
Output 10 MHz
Signal Square wave, 2.5 V pp, ac coupling
-9
Input 10 MHz
Signal 1 V nominal (automatic detection)
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Model 1120 - 1pS Time Interval Counter
Clock
Time base 10 MHz ovenized
Stability +/- 0.05 ppm
Accuracy 10
Interface
Front panel, Ethernet 10/100
Mb/s, Internet (Web page)
General
Power required 90
Weight < 10 Kg
Dimensions 19 , 1 U, 300 mm
-9
220 V / 50
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60 Hz
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Model 1120 - 1pS Time Interval Counter
3. OPERATING INFORMATION
3.1. Principle:
3.1.1. block diagram
10 MHz
Gate
Start
Clock
converter
Linear
interpolator
155 MHz
Clock
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Calibrator
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Cal
Timing
controller
Stop
Input
control
3.1.2. Time interval mode
In timing interval mode the BNC 1120 measures the time between a Start and Stop
pulse. The timing information is obtained by a processing that combines the two following
information:
Coarse information provided by a wide range Time counter running at 155.52 MHz
(6.43 ns resolution),
And fine information provided by the two linear interpolators started by the event
on the Start and Stop inputs.
A gate input can be used to enable or disable all Start and Stop events as desired.
Linear
interpolator
Interface Controller
Time counter
Keyboard
display
Ethernet
The BNC 1120 can make positive or negative time measurements. The start pulse can
occur before or after the stop pulse.
The number of sequence measurement can be controlled by the sequence command
single/repetitive. In repetitive sequence the number of measurement is controlled by the
value write in sample command.
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Model 1120 - 1pS Time Interval Counter
3.1.3. Event mode
In this mode the BNC 1120 counts events at Start and at Stop inputs.
Event counting can be gated:
Internally with a gate ranging of 1 second,
Externally through the duration of input gate.
The trigger level and slope for a transition event are adjustable on both the Start and
Stop inputs.
Event rate up to 10MHz can be counted with a maximum of 10 000 000 digits.
3.1.4. Auto-calibration
The BNC 1120 has a powerful built-in auto-calibration routine that compensates the
nonlinearities in time to digital converter. The auto-calibration is done through a software
command and takes about 30 seconds to be performed.
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To calibrate the BNC 1120, send an Ethernet command or send CALIBRATE with the
front panel.
3.1.5. 10 MHz Time base
The accuracy of the BNC 1120 depends of the quality of the selected time base.
The internal 10MHz standard time base is an ovenized oscillator with stability of
±0.005 ppm.
A rear panel input allows you to connect an external 10MHz source as a time base.
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1. Model 1120 - 1pS Time Interval Counter
3.1.6. Arming mode
The BNC 1120 has 3 arming modes:
ARM ON START,
START
pulse
STOP
pulse
Time
Measurement
ARM ON STOP,
START
pulse
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time
STOP
pulse
Time
Measurement
ARM ON GATE.
GATE
pulse
START
pulse
STOP
pulse
Time
Measurement
time
time
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Model 1120 - 1pS Time Interval Counter
3.2. Front panel operation
3.2.1. Interface
The front panel consists of:
L.E.D. s,
Keyboard and LCD display that form the dialogue components in local mode
3.2.1.1. Leds
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The 4 leds displays following information:
PWR BNC 1120 ON/OFF
BUSY
F1 CALCUL
F2 OPTICAL MESSAGE
3.2.1.2. Front panel connectors
Start: BNC connector for application of the start events.
Stop:
BNC connector for application of the stop events.
Gate:
The 2 X 20 characters LCD display is the user interface for the front panel programming
operation in local mode.
Six keys select the function
BNC connector for enabling Start and Stop events.
3.2.1.3. LCD display
3.2.1.4. Keyboard
will allow user to select display line or if you are in cursor mode you can
increment or decrement digit selected by the cursor.
< , > will allow user to move the cursor position
OK set cursor mode or if you are already in cursor mode store the current value
and clear the cursor mode. Start the measure in repetitive or single shot mode.
Esc clear cursor mode without storing the current value. Stop the measure in
repetitive mode.
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Model 1120 - 1pS Time Interval Counter
3.2.2. Display menu
G F T 2 0 0 2 s n 1 0 1 V 1 . 1 . 2
2 8 . 1 ° C -
I N T E R N A L 1 0 M H z
S T A R T E X T 1 . 5 0 V +
S T O P E X T 1 . 5 0 V +
1 0 0 S I N G L E
A R M O N S T A R T
3.2.2.1. Start
S T A R T
T r i g g e r = I N H I B I T E D
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I N T E R N A L
E X T E R N A L
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S T A R T
L e v e l 1 . 5 0 V
S T A R T
P o l a r i t y +
-
3.2.2.2. Stop
S T O P
T r i g g e r = I N H I B I T E D
I N T E R N A L
E X T E R N A L
S T O P
L e v e l 1 . 5 0 V
S T O P
P o l a r i t y +
-
3.2.2.1. Sequence measurement
S a m p l e s
1 0 0 0
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Model 1120 - 1pS Time Interval Counter
S e q u e n c e
S i n g l e
R e p e t i t i v e
3.2.2.2. Arming mode
A r m i n g m o d e
A R M O N S T A R T
A R M O N S T O P
A R M O N G A T E
3.2.2.3. Measurement result
Maximum / Minimum
X / M x =
Y M n =
With X: umber of samples measured and Y: number of samples
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Mean delay / Jitter
D = 0 p s
J t = 0 . 0 p s
Frequency
F r e q u e n c y
0 H z .
Number of event
C o u n t e r
0 .
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Model 1120 - 1pS Time Interval Counter
3.2.3. IP adress
G F T 2 0 0 2 s n 1 0 1 v 1 . 4 . 5
Press OK and OK
I P A D R E S S
0 9 9 . 0 0 0 . 0 0 0 . 1 2 3
Press
N E T M A S K
Press
G A T E W A Y A D R E S S
(UP)
2 5 5 . 0 0 0 . 0 0 0 . 0 0 0
(UP)
0 9 9 . 0 0 0 . 0 0 0 . 1 2 3
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Press
U S E D H C P
Press
S Y N C W O R D
Press
L A N G U A G E
Press
C a l i b r a t e
P R E S S O K
Press
(UP)
(UP)
(UP)
E n g l i s h
(UP)
(UP)
R E T U R N T O M A I N
M E N U
N O
3 5
Press
Press OK to go BNC 1120 menu
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(UP) to go IP menu
Model 1120 - 1pS Time Interval Counter
3.2.4. Default value
The default values are the following:
At factory:
@IP: 99.0.0.18,
@GW: 99.0.0.1,
Mask: 255.0.0.0,
At start up:
START: OFF,
STOP: OFF,
Level: 0.5 V,
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3.3. Rear panel operation
3.3.1.1. Rear panel connectors
10MHZ input (BNC type): When the Rack is in external clock mode the internal oscillator
will phase lock to a 10MHz signal applied to this connector
10MHZ output (BNC type): This signal is a 10 MHz square wave. It is a copy of the
internal oscillator and can be used to verify the frequency or to drive another BNC 1120,
which are operating, in external mode.
Option: Optical input (SC/PC type): This optical input is compliant to GFT3001 for
timing system measurement. In that mode the BNC 1120 use the clock and the
triggers provided by the optical network connected to GFT3001.
Power source: For 110 to 220 Voltages AC line.
3.3.1.2. Rear panel control
Power switch: Turns AC power on.
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Model 1120 - 1pS Time Interval Counter
4. CONNECTING TO THE INSTRUMENT VIA ETHERNET
4.1. Command structure
*IDN?
Syntax: *IDN?
Form: Query
Description: Queries instrument identification. Response gives instrument
model, serial number and firmware version.
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Parameter: -
Example: GFTy/MIPSI,BNC 1120,SN101/000000,V1.0
Instrument model: BNC 1120
Serial number: 101,
Firmware version: 1.1
ARM
Syntax: ARM START|STOP
ARM?
Form: Set & Query
Description: Define the arming mode or ask for current arming mode.
Command
Parameter:
START arm on start
STOP arm on stop
Query response :ARM START arming on start
:ARM STOP arming on stop
Example: ARM START
ARM? => :ARM START
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Model 1120 - 1pS Time Interval Counter
CAL
Syntax: CAL
Form: Set
Description: Start an auto calibration sequence.
Command
Parameter:
Query response -
Example: CAL
COUNT
Syntax: COUNT?
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Form: Query
Description: Query the counter or frequency measurement.
Query
Parameter:
Example: COUNT? => :COUNT 32456123
DELAY
Syntax: DELAY? [MEAN|MIN|MAX]
Form: Query
Description: Query the delay measurement in picoseconds.
Query
Parameter:
-
MEAN return the mean value of the samples
MIN return the minimum value of the samples
MAX return the maximum value of the samples
Example: DELAY? MEAN => :DELAY MIN, 145
DELAY ? => :DELAY 141,145,148
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Model 1120 - 1pS Time Interval Counter
DFORMAT
Syntax: DFORMAT ASC|XML
Form: Set and Query
Description: Set or query the response format.
Command
Parameter:
Example: DFORMAT ASC
JITTER
ASC set the format to simple ascii
XML set the format to XML
DFORMAT? => :DFORMAT ASC
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Syntax: JITTER? PP|RMS
Form: Query
Description: Query the jitter measurement in picosecond.
Query
Parameter:
Example: JITTER? PP => :JITTER 245
PP return the peak to peak jitter of the samples
RMS return the RMS jitter of the samples
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Model 1120 - 1pS Time Interval Counter
LEVEL
Syntax: LEVEL START|STOP,<level>
Form: Set & Query
Description: Set or query channel trigger level.
Command
Parameter:
Specified limit 0.5V <= level <= 5.0V
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LEVEL? START|STOP
START set level for START channel
STOP set level for STOP channel
<level> level between 0.5 and 5.0 volts
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Example: LEVEL START,2.8
LEVEL? START=> :LEVEL START,2.8
MODE
Syntax: MODE SING|REP
MODE?
Form: Set & Query
Description: Set or query mode.
Command
Parameter:
Query response :MODE SING single measurement
Example: MODE SING
SING set single measurement
REP set repetitive measurement
:MODE REP repetitive measurement
MODE? => :MODE SING
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Model 1120 - 1pS Time Interval Counter
POL
Syntax: POL START|STOP,+|-
Form: Set & Query
Description: Set or query channel trigger polarity.
Command
Parameter:
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POL? START|STOP
START set polarity for START channel
STOP set polarity for STOP channel
+ set polarity to positive
- set polarity to negative
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Example: POL START,+
POL? START=> :POL START,+
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Model 1120 - 1pS Time Interval Counter
RESULTS
Syntax: RESULTS? FLOAT,<offset>
Form: Query
Description: Query the samples measurement results.
Query
Parameter:
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The FLOAT query always returns real computed values.
As the query response for all samples can be very long, the query
only returns 100 sample values starting at the offset specified in
the query
FLOAT returns the translated values of the samples
<offset> starting position for the 100 samples returned
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Example: RESULTS? FLOAT,0 => RESULTS 0,12345,12346,12343,
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Model 1120 - 1pS Time Interval Counter
RUN
Syntax: RUN DELAY|FREQ|COUNT
Form: Set & Query
Description: Start measure or ask if measuring.
Command
Parameter:
Query response :RUN YES measurement running
RUN?
DELAY start a delay measurement
FREQ start a frequency measurement
COUNT start a count measurement
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:RUN CAL calibration running
:RUN NO no measurement running
Example: RUN DELAY
RUN? => :RUN YES
SAMPLES
Syntax: SAMPLES <samples>
SAMPLES?
Form: Set & Query
Description: Set or query the measurement samples.
Command
Parameter:
Specified limit 1 <= samples <= 1000
<samples> number of samples
Example: SAMPLES 500
SAMPLES? => :SAMPLES 500
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Model 1120 - 1pS Time Interval Counter
STAT
Syntax: STAT CLEAR
Form: Set & Query
Description: Clear or query the status.
Command
Parameter:
Query
Parameter
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STAT? POW|TRIG|CLK|TEMP|SCAN
CLEAR clear the trig status
SCAN, this command measure all analog values, convert analog
value in digital value, save the digital value in the interface
controller and refresh the value in the front panel
POW return the power levels (+6V, -6V, +3.3V, +1.8V, +12V)
TRIG return the trigger status
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CLK return the clock status
TEMP return the equipment temperature
Example: STAT CLEAR
STAT SCAN
STAT? POW => :STAT POW,6.00,-6.00,3.30,1.80,12.00
STAT? TRIG => :STAT TRIG,1,1
STAT? CLK => :STAT CLK,INTERNAL
STAT? TEMP => :STAT TEMP,45.27
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Model 1120 - 1pS Time Interval Counter
STOP
Syntax: STOP
Form: Set
Description: Stop active measurement.
Command
Parameter:
Query response -
Example: STOP
TRIG
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Syntax: TRIG START|STOP,INH|INT|EXT
TRIG? START|STOP
Form: Set & Query
Description: Set or query channel trigger mode.
Command
Parameter:
Example: TRIG START,EXT
START set trigger for START channel
STOP set trigger for STOP channel
INH trigger inhibited
INT internal trigger (1 kHz)
EXT external trigger
TRIG? START => :TRIG START,EXT
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Model 1120 - 1pS Time Interval Counter
4.2. Remote control via Internet (web page)
BNC 1120 is controlled by 3 web pages:
result: this page controls the instrument and displays results,
setup: this page is to modify the setup,
status: this page is to display some internal values and states for service people.
4.2.1. Results web page
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Figure 4-1 Web page: Results
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Model 1120 - 1pS Time Interval Counter
4.2.2. Set up web page
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Figure 4-2 Web page: Select trigger for START and STOP
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Model 1120 - 1pS Time Interval Counter
4.2.3. Status web page
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Figure 4-3 Web page: Temperature, power supply,
4.3. Remote control via Ethernet
Launch telnet.
Send the command: open ip.address 4000 if you want to dialogue with your equipment.
Send the command: open ip.address 4001 if you want to stop the connexion at the port = 4000.
Send the command: open ip.address 4002 if you want to reboot your equipment.
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Model 1120 - 1pS Time Interval Counter
5. OPERATION EXAMPLES
5.1. Example 1
Realize in local mode a repetitive Time interval measurement.
Initial setup
Turn on the BNC 1120 with switch located on the rear panel
After few second the first line of the menu, BNC 1120 is displayed
The instrument must warm-up at least 20 minutes for maximum accuracy
Test signal
The operation example is performed using a test signal with following characteristics (Pulse
generator):
Duration:
Rise time
Level:
Repetition time :
1000 ns,
5 ns,
3 V,
100 Hz,
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This signal must be coupled with 50 divider then connected to start and stop input of BNC 1120
The length of the START cable = 1 m. T
Setting up the instrument
Use the front panel keyboard to reset the Setup menu as follows
Start trigger External
Start level 1.50 V
Start polarity +
Stop trigger External
Stop level 1.50 V
Stop polarity +
Samples 1000
Sequence repetitive
Arming mode on start
Start the measurement
Display the result line Mean delay / jitter, and press the OK keys to start the measurement
The front panel leds busy must be on and tilt each second
Result must be
Delay = 5 200 ns
Jitter = 8 ps rms
For stopping the measurement press the ESC key
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Model 1120 - 1pS Time Interval Counter
5.2. Example 2
Realize in local mode a frequency measurement on start input
Same initial set-up and test signal as for example n°1
Setting up the instrument
Use the front panel keyboard to reset the Setup menu as follows
Start the measurement
Display the result line frequency, and press the OK keys to start the measurement
The front panel leds busy must be on and tilt each second
Result must be
Frequency = 100 Hz
For stopping the measurement press the OK key
Start trigger External
Start level 1.50 V
Start polarity +
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Model 1120 - 1pS Time Interval Counter
6. ANNEXE : OPTION 1 OPTICAL MESSAGE
6.1. Front panel operation
6.1.1. Display menu
G F T 2 0 0 2 s n 1 0 1 V 1 . 1 . 2
2 8 . 1 ° C - 5 6 . 8 d B m
I N T E R N A L 1 0 M H z
S T A R T E X T 1 . 5 0 V +
S T O P E X T 1 . 5 0 V +
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1 0 0 S I N G L E
A R M O N S T A R T
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Model 1120 - 1pS Time Interval Counter
6.1.1.1. Start
S T A R T
T r i g g e r = I N H I B I T E D
S T A R T
L e v e l 1 . 5 0 V
S T A R T
P o l a r i t y +
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I N T E R N A L
E X T E R N A L
R E P F 1
R E P F 2
R E P F 3
S I N G L E 1
S I N G L E 2
-
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6.1.1.2. Stop
S T O P
T r i g g e r = I N H I B I T E D
I N T E R N A L
E X T E R N A L
R E P F 3
R E P F 2
R E P F 3
S I N G L E 1
S I N G L E 2
S T O P
L e v e l 1 . 5 0 V
S T O P
P o l a r i t y +
-
6.1.1.3. Sequence measurement
S a m p l e s
1 0 0 0
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Model 1120 - 1pS Time Interval Counter
S e q u e n c e
S i n g l e
R e p e t i t i v e
6.1.1.4. Arming mode
A r m i n g m o d e
A R M O N S T A R T
A R M O N S T O P
A R M O N G A T E
6.1.1.5. Measurement result
Maximum / Minimum
X / M x =
Y M n =
With X: umber of samples measured and Y: number of samples
NUT 012
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Date : 18/01/2011
Mean delay / Jitter
D = 0 p s
J t = 0 . 0 p s
Frequency
F r e q u e n c y
0 H z .
Number of event
C o u n t e r
0 .
G R O U P
6.1.1.6. Historical command
. 1
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Model 1120 - 1pS Time Interval Counter
6.1.2. IP adress
G F T 2 0 0 2 s n 1 0 1 v 1 . 4 . 5
Press OK and OK
I P A D R E S S
0 9 9 . 0 0 0 . 0 0 0 . 1 2 3
Press
N E T M A S K
Press
G A T E W A Y A D R E S S
(UP)
2 5 5 . 0 0 0 . 0 0 0 . 0 0 0
(UP)
0 9 9 . 0 0 0 . 0 0 0 . 1 2 3
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Date : 18/01/2011
Press
U S E D H C P
Press
S Y N C W O R D
Press
L A N G U A G E
Press
C a l i b r a t e
P R E S S O K
Press
(UP)
(UP)
(UP)
E n g l i s h
(UP)
(UP)
R E T U R N T O M A I N
M E N U
N O
3 5
Press
Press OK to go BNC 1120 menu
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(UP) to go IP menu
Model 1120 - 1pS Time Interval Counter
6.1.3. Command structure
STAT
Syntax: STAT CLEAR
Form: Set & Query
Description: Clear or query the status.
Command
Parameter:
Query
Parameter
NUT 012
STAT? POW|TRIG|CLK|TEMP|POPT|SYN
CLEAR: clear the trig status
SYN return the synthesis word
01 power fault
02 sync error
04 inhibited
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Date : 18/01/2011
POW return the power levels (+6V, -6V, +3.3V, +1.8V, +12V)
TRIG return the trigger status
CLK return the clock status
TEMP return the equipment temperature
POPT return the optical received power
Example: STAT CLEAR
STAT? SYN => :STAT SYN,#H0001
STAT? POW => :STAT POW,6.00,-6.00,3.30,1.80,12.00
STAT? TRIG => :STAT TRIG,1,1
STAT? CLK => :STAT CLK,INTERNAL
STAT? POPT => :STAT POPT,4.54
STAT? TEMP => :STAT TEMP,45.27
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Model 1120 - 1pS Time Interval Counter
SYNC
Syntax: SYNC <syncword>
Form: Set & Query
Description: Set or query the sync word for optical channel.
Command
Parameter:
Example: SYNC #H35
SYNC?
<sync> sync word (format #Hxx)
SYNC? => :SYNC #H35
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Date : 18/01/2011
TRIG
Syntax: TRIG START|STOP,INH|INT|EXT|F1|F2|F3|SS1|SS2
TRIG? START|STOP
Form: Set & Query
Description: Set or query channel trigger mode.
Command
Parameter:
START set trigger for START channel
STOP set trigger for STOP channel
INH trigger inhibited
INT internal trigger (1 kHz)
EXT external trigger
F1,F2,F3 trigger on frequency 1, 2 or 3
SS1 trigger on SS1 signal
SS2 trigger on SS2 signal
Example: TRIG START,EXT
TRIG? START => :TRIG START,EXT
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