BNC 745-20C-T User manual

•20 independent delay channels,
•100 ps delay resolution,
•10 seconds delay range,
•Adjustable output level, polarity and width.

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
EDITION
TABLE DES MATIERES
3
REFERENCE DOCUMENTS .........................................................................................................................................
3
1.
GENERAL INFORMATION ..........................................................................................................................
4
1.1.
DESCRIPTION ...............................................................................................................................................
4
1.2.
INSTALLATION .............................................................................................................................................
5
1.2.1.
Power source.......................................................................................................................................
5
1.2.2.
Power cord ..........................................................................................................................................
5
1.3.
OPERATING TEMPERATURE ..........................................................................................................................
5
1.4.
RACK MOUNTING INFORMATION ..................................................................................................................
5
1.5. SELF-TEST ....................................................................................................................................................
5
1.6.
OPTIMAL PERFORMANCE..............................................................................................................................
5
2.
SPECIFICATIONS ...........................................................................................................................................
6
3.
OPERATING INFORMATION ......................................................................................................................
7
3.1.
PRINCIPLE – BLOCK DIAGRAM .....................................................................................................................
7
3.2.
LOCAL COMMAND AND PARAMETER ............................................................................................................
8
3.3.
FRONT PANEL OPERATION SUMMARY ...........................................................................................................
9
3.3.1.
LCD .....................................................................................................................................................
9
3.3.2.
AUX 1 to 3 ...........................................................................................................................................
9
3.4.
REAR PANEL OPERATION SUMMARY...........................................................................................................
10
3.4.1.
Power switch .....................................................................................................................................
10
3.4.2.
Ethernet port (LAN)...........................................................................................................................
10
3.4.3.
Trigger input (TRIG IN) ....................................................................................................................
10
3.4.4.
Trigger ouptut (T0)............................................................................................................................
10
3.4.5.
Clock output (CLK OUT) ..................................................................................................................
10
3.4.6.
Clock input (CLK IN) ........................................................................................................................
10
3.4.7.
Trigger output T1 to T20 ...................................................................................................................
10
3.5.
DEFAULT VALUE ........................................................................................................................................
11
4. CONNECTING TO THE INSTRUMENT VIA ETHERNET ....................................................................
12
4.1.
GENERALITY ..............................................................................................................................................
12
4.2.
COMMAND STRUCTURE ..............................................................................................................................
12
4.2.1.
*IDN? ................................................................................................................................................
13
4.2.2.
DELAY...............................................................................................................................................
13
4.2.3.
TRIG ..................................................................................................................................................
14
4.2.4.
VOLTAGE LEVEL.............................................................................................................................
14
4.2.5.
WIDTH ..............................................................................................................................................
15
4.2.6.
POLARITY.........................................................................................................................................
15
4.2.7.
FREQUENCY....................................................................................................................................
16
4.2.8.
RUN...................................................................................................................................................
16
4.2.9.
STAT ..................................................................................................................................................
17
4.2.10.
IP adress............................................................................................................................................
18
4.2.11.
Net mask adress.................................................................................................................................
18
4.2.12.
GW adress .........................................................................................................................................
19
4.3.
REMOTE CONTROL VIA INTERNET...............................................................................................................
20
5.
SOFTWARE ....................................................................................................................................................
21
BERKELEY NUCLEONICS Page - 2 / 22-

User's manual - 745-20C-T
BNC
Ed. 1
Date : 05/02/2013
Edition
Write by :
Date & Visa : Massy, le
MONNIER-BOURDIN
Technical manager
Ed.
Date
Description
1
1/2013
Creation
Reference documents
Documents
Reference
DR 1
DR 2
DR 3
DR 4
BERKELEY NUCLEONICS Page - 3 / 22-

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
1. GENERAL INFORMATION
1.1. Description
The 745-20C-T Digital Delay Generator provides twenty independent delayed output pulses.
Delays up to 10 seconds may be programmed with 100ps resolution and channel to channel jitter
less than 50 ps rms.
BNC outputs deliver pulses, with adjustable level (3 to 6V) and polarity, into 50Ωload.
A trigger out signal (T0) is provided to reference the delayed outputs in different operation mode.
745-20C-T parameters may be remote controlled via an Ethernet interface (10/100Mb/s) (basic
commands or Web page).
Instrument Options
Option 1
Clock output (same frequency as specified clock input)
Option 2
2.5 to 10 V channels, 1 ns rise time, positive polarity
Option 3
Amplitude up to 20 V, adjustable
Option 4
Maximum amplitude up to 32V (fixed)
Option 5
1 ps resolution
Option 6
Front panel for local control (touchscreen)
Other
trigger source saved after shut down, Immediate modification of output pulse
without validation, specific options available upon request.
Package contents:
The box you receive should contain the
following: o 745-20C-T
instrument,
o Power cable, o
User’s manual,
o CD containing DLL and Labview driver.
BERKELEY NUCLEONICS product:
For more information about Berkeley Nucleonics product see our web site:
www.berkeleynucleonics.com
BERKELEY NUCLEONICS Page - 4 / 22-

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
1.2. Installation
1.2.1. Power source
The 745-20C-T can be operated from 90 VAC to 240 VAC nominal supply source.
The maximum power consumption of the 745-20C-T is 80 W.
1.2.2. Power cord
The 745-20C-T 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.
1.3. Operating temperature
The 745-20C-T 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 745-20C-T 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.
1.4. Rack mounting information
The 745-20C-T will fit a 19 inch rack.
1.5. Self-test
The model, firmware version, serial numbers for the units and self-test will be displayed a certain
time after the power is applied, depending on the ambient temperature. The self-test should not
exceed 1 minute.
1.6. Optimal performance
To ensure optimal performance, it is recommended to wait 1 hour after the equipment’s switching
on.
BERKELEY NUCLEONICS Page - 5 / 22-

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
2. SPECIFICATIONS
Delays
Channels
20 independent delay channels
Range
0 to 10 seconds
Resolution
100 ps
RMS Jitter
< 50 ps + delay x 10-7 rms
Internal time base
Frequency
CLK RF
Stability
10-8
Trigger
Single shot source SS1 and
Ethernet or Web page or trigger input
SS2 (synchronous of F3)
Synchronous
repetitive
3 frequencies: F1> F2 > F3
triggers
F1: 1000, 500, 200, 100, 50, 20, 10, 5, 2 Hz
F2: 200, 100, 50, 20, 10, 5, 2, 1, 0.5 Hz
F3: 50, 20, 10, 5, 2, 1, 0.5, 0.2, 0.1 Hz
Outputs
Delayed output (T1 to T20)
Positive or negative pulse into 50 Ω,
Level: 3 to 6 V
Amplitude 3 to 6 V , resolution: 10 mV,
Rise time : < 5 ns,
Fall time: < 10 ns,
Tm :
< 3 ns
Width :
Width: 100 ns to 300 ms
100 ns to 300 ms
Connector type BNC,
Reference output (T0)
Positive pulse into 50 Ω, amplitude 3 to 6V, resolution 10 mV
Rise time < 5 ns, fall time < 10 ns, width 100ns to 300 ms
Connector type BNC
CLK RF / 2 clock output
Frequency: CLK RF / 2, > 1V / 50 Ω,
(option)
Connector type BNC,
Interface
Front panel (option), Ethernet 10/100 Mb/s, Internet (Web page)
General
Power Required
90 – 220 V / 50 – 60 Hz / 1 A.
Weight
Net: < 10 kg
Dimensions
19’’, 2 U, 320 mm without handles
BERKELEY NUCLEONICS Page - 6 / 22-

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
3. OPERATING INFORMATION
3.1. Principle – Block diagram
The principle of the programmable delay generator is described in the figure bellow:
CLK RF
Clock
Trigger
Clock
(TRIG IN)
Controller
Delay Reference
20 Digital Delays
T0
T1
Analog
T2
Vernier
T3
T20
KeyBoard
Display
Interface Controller
Ethernet
The sequence follows 3 phases:
•After on insertion delay a reference pulse appear at the “T0” output,
•Following the reference a pulse will appear on each channel after a specified delay,
•At the end of sequence, after last delayed pulse outputs, the delay generators are initiate.
When a sequence is in progress the instrument will not respond to a trigger event.
Each delayed values output pulse (T1 to T20) can be independently adjustable in level and width.
All values (delay, level, width) are saving when shut down the equipment, except the trigger source
(option). After the power on, all trigger sources are off (INH).
BERKELEY NUCLEONICS Page -7 / 22 -

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
3.2. Local command and parameter
The following chart described the trigger source, amplitude and width for each trigger out T0 and delayed
output T1 to T20:
745-20C-T
T0 to T20
Inhibited (INH)
SOURCE
Repetitive F1 (F1)
Repetitive F2 (F2)
TRIGG
ER
Repetitive F3 (F3)
Single Shot 1 (SS1)
Single Shot 2 (SS2)
AMPLITUDE
3 V to 6 V in 10 mV steps
WIDTH
100 ns to 300 ms in CLK RF steps
BERKELEY NUCLEONICS Page -8 / 22 -

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
3.3. Front panel operation summary
The 745-20C-T front panel consists of a LCD display and 3 BNC.
3.3.1. LCD
The LCD is screen tactile (option).
3.3.2. AUX 1 to 3
TBD.
BERKELEY NUCLEONICS Page -9 / 22-
BNC 745-20C-T

User's manual - 745-20C-T BNC Ed. 1 Date : 05/02/2013
3.4. Rear panel operation summary
All input or output connections to the 745-20C-T are made on the rear panel.
3.4.1. Power switch
The unit is turned on by depressing the POWER button. The 745-20C-T can be operated
from 90 to 240 V at a line frequency of 50 – 60 Hz.
3.4.2. Ethernet port (LAN)
The RJ45 Ethernet rear panel connector allows a computer to control the 745-20C-T.
3.4.3. Trigger input (TRIG IN)
BNC connector for application of the trigger input signal that generates the single shot
sequence.
3.4.4. Trigger ouptut (T0)
BNC connector for signal output. This is the output reference. This should be terminated in
50Ω.
3.4.5. Clock output (CLK OUT)
BNC connector for signal output. This is the 85 MHz reference. This should be terminated in
50 Ω.
3.4.6. Clock input (CLK IN)
BNC connector for signal input. This is the 85 MHz reference.
3.4.7. Trigger output T1 to T20
BNC connectors for delayed signal outputs. This should be terminated in 50 Ω.
BERKELEY NUCLEONICS Page -10 / 22 -