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BNC 745-T, Руководство пользователя

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MODEL 745-T 

FOUR CHANNEL DIGITAL DELAY/ PULSE GENERATOR

User Manual 

 

The MODEL 745-T

 

Four high resolution delay channels 

0.25ps delay resolution 

<25ps RMS jitter max (5ps for short delay) 

20s delay range (relative/absolute reference) 

Three trigger sources: external, internal or command 

Positive or Negative trigger slope 

Single, Repetitive or Burst trigger mode 

Gate mode 

External trigger prescaler (pulse picking) 

Tunable output (magnitude 2-5V, width 100ns-10µs) 
50 

Ω

 load 

T0 reference output 

Clock output 

Gate input  

High precision internal clock (OCXO 50ppb) 

USB 

Ethernet interface (Web page) 

Options: 

4 auxiliary high resolution delay channels (1.25ns, 2 to 

5V Amplitude but common tuning) 

The MODEL 745-T digital delay generator provides four 

independent high resolution digital delay channels. The 

rms jitter between the trigger and any outputs is 25ps + 

delay  x 10

-8

  max. which  ensures  a  high

 

performance 

delay.  The device can be triggered by different ways: 

External trigger via a BNC input,  Internal  trigger and 

Software  command  trigger, each one  with  repetitive, 

single and burst trigger modes.

3/2/18

Berkeley Nucleonics Corporation, 2955 Kerner Blvd. San Rafael, CA 94901 

[email protected], Call 800-234-7858 or Live-Chat @ www.berkeleynucleonics.com 

1 of 35

Содержание 745-T

Страница 1: ...ternal clock OCXO 50ppb USB Ethernet interface Web page Options 4 auxiliary high resolution delay channels 1 25ns 2 to 5V Amplitude but common tuning The MODEL 745 T digital delay generator provides f...

Страница 2: ...inciple using external trigger 16 Timing principle using internal trigger 18 Timing principle using Burst mode 19 7 OPERATING EXAMPLE 20 Default value 20 Initial setup 20 Setting up the instrument Rec...

Страница 3: ...Creation 2 04 11 2015 Modification channels T1 T8 become channels A H 3 2 18 Berkeley Nucleonics Corporation 2955 Kerner Blvd San Rafael CA 94901 Info berkeleynucleonics com Call 800 234 7858 or Live...

Страница 4: ...e is a OCXO with a stability of 50ppb The device offers three operating trigger modes repetitive internal or external source single shot internal external or asynchronous source and a burst mode inter...

Страница 5: ...s cooled by air circulation Self test The unit model firmware version serial numbers and the result of self test procedure will be displayed one minute after power on After 30s if the test is good the...

Страница 6: ...ax 900ps typical Fall time 5ns max 2ns typical Clock Input Frequency 10 or 80 MHz 50 duty cycle Ask factory for custom clock frequency Clock Output Frequency 10 or 80MHz directly related to the input...

Страница 7: ...N or STOP all output channels BNCs One input Trigger one Gate input and 4 independent output channels A D are available The output voltage is tunable from 2 to 5V for each output independently and eac...

Страница 8: ...ailable The CLK IN connector accepts either 10MHz or 80MHz or custom frequency clock frequency The clock output CLK OUT comes from the CLK IN connector or from the internal oscillator if clock in sign...

Страница 9: ...bar to change the displayed channel Internal Frequencies Frequency or Period settings of internal trigger generator 1 2 Press the P button to display period settings General Clock gate store recall a...

Страница 10: ...e delay of channel A to D 1ps resolution display E to H 1 25ns resolution display TX Ampl To adjust Output pulse amplitude of channel A to H TX Width To adjust Output pulse width of channel TX TX Gate...

Страница 11: ...ting and conversely General settings Displayed name Description and settings Ext Clock Input clock setting 10 or 80MHz Gate Mode To select the Gate mode General gate to aim every outputs Channel gate...

Страница 12: ...nstrument s IP mask GATEWAY ADRESS Set the instrument s IP gateway USE DHCP YES automatic IP address assignment or NO for manual IP assignment LANGUAGE Select French or English language for menu RETUR...

Страница 13: ...rnal trigger settings Burst Mode Settings Displayed name Description and settings Burst Trigger To select the trigger source Int Ext or manual Pulse Number To select the pulse number in each burst to...

Страница 14: ...front panel or via remote control web page Ethernet link 2 frequency generators derived from input clock can be used as repetitive triggers IN1 and IN2 corresponding to programmable Frequency 1 and 2...

Страница 15: ...E to H can be independently tuned in absolute or relative delay and width All values delay delay reference width gate are saved in memory except the trigger source Calibration parameters are saved onb...

Страница 16: ...nce is in progress the instrument does not respond to a trigger event The MODEL 745 T must be configured trigger delay etc before starting any sequences Figure 12 External Trigger Timing In response t...

Страница 17: ...Figure 13 Prescaler value 3 2 18 Berkeley Nucleonics Corporation 2955 Kerner Blvd San Rafael CA 94901 Info berkeleynucleonics com Call 800 234 7858 or Live Chat www berkeleynucleonics com 17 of 35...

Страница 18: ...ted on Figure 14 It is obtained by setting general Gate Mode to CHANNEL and channel A Gate mode to ON The result is that the Gate In signal allows the pulse output of the channel A The width parameter...

Страница 19: ...train It has to be noticed that when a delay D is specified on a channel using Burst mode as trigger mode the MODEL 745 T manages the delay generation according to that rule If delay 15 the delay gen...

Страница 20: ...shape with repetitive frequency 1000 Hz Amplitude 4 0V Width 1 0 s Setting up the instrument Single shot mode The procedure explained before can be followed up to the trigger choice 3 single shot mode...

Страница 21: ...n Stop the generator To stop the generation of that repetitive pulse you have to set A trigger to OFF value This will switch off the corresponding LED With an oscilloscope you can check if the output...

Страница 22: ...s the instrument s IP mask with NM NM XXX XXX XXX XXX o Set s the instrument s IP gateway GW XXX XXX XXX XXX o Query s the instrument s IP gateway with GW GW XXX XXX XXX XXX About Telnet Ports 3 ports...

Страница 23: ...Burst mode internal external or local Parameter Source IN1 IN2 EXT SSL RST value Example Set external trigger source BTRIG EXT Query BTRIG BTRIG EXT BURST PULSE PERIOD Syntax PERIOD PB T PERIOD PB For...

Страница 24: ...delaytime picosecond Parameter Tx channel number 1 to 4 or 1 to 8 for 8 channel Ti channel number 0 to 4 or 0 to 8 for 8 channel Tn and Ti have to be different delaytime picosecond delay RST value Sp...

Страница 25: ...to channel 4 AMPL T4 2500 Query mode to channel 4 AMPL T4 TRIG T4 2500 WIDTH Syntax WIDTH Tx W WIDTH Tx Form Set Query Description Channel Tx width setting Parameter Tx channel number 1 to 4 W width...

Страница 26: ...6 1 Example 4 TPRESC 4 Query mode TPRESC 4 FREQUENCY Syntax FREQ Fx F FREQ Fx Form Set Query Description Set internal mode frequency Parameter Fx F1 F2 F frequency Hz RST value Specified limit 1 Hz to...

Страница 27: ...n Form Set Description To store MODEL 745 T current configuration Parameter n configuration number RST value Specified limit 0 to 3 Example STORE 1 RECALL Syntax RECALL n Form Set Description To reca...

Страница 28: ...dress Syntax IP x x x x IP Form Set Query Description IP Adress Parameter x x x x IP address RST value Off Example IP 172 17 23 6 IP IP 172 17 23 6 Net mask address Syntax NM x x x x NM Form Set Query...

Страница 29: ...nd burst mode On the first setting change the user will be asked for Login and Password Default Login BNC Default password bnc Status LEDs indicate which outputs are active or not and Fault LEDs warn...

Страница 30: ...esults appear on the following figures Figure 18 Main pulse channels A to D 3 2 18 Berkeley Nucleonics Corporation 2955 Kerner Blvd San Rafael CA 94901 Info berkeleynucleonics com Call 800 234 7858 or...

Страница 31: ...19 Auxiliary pulse channels E to H 3 2 18 Berkeley Nucleonics Corporation 2955 Kerner Blvd San Rafael CA 94901 Info berkeleynucleonics com Call 800 234 7858 or Live Chat www berkeleynucleonics com 31...

Страница 32: ...Zoom on delay jitter 0 20 40 60 80 100 120 140 160 180 200 220 240 260 1 100 10000 1000000 100000000 Jitter ps Delay ns Internal External 0 5 10 15 20 25 30 1 100 10000 1000000 Jitter ps Delay ns Int...

Страница 33: ...us substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in SJ T 11363 2006 Product Marking Explanations In accordance with the requirement...

Страница 34: ...ffice to obtain the manufacture date for your product Packaging Recycling Marks EIP packaging is marked in accordance with the needs and requirements for recycling reuse and regeneration as defined in...

Страница 35: ...NOTES 3 2 18 Berkeley Nucleonics Corporation 2955 Kerner Blvd San Rafael CA 94901 Info berkeleynucleonics com Call 800 234 7858 or Live Chat www berkeleynucleonics com 35 of 35...

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