BNC 745 - Manual (Page 7)

Model 745 Digital Delay Generator. November 2013
2- S
PECIFICATIONS
Delays
Channels
4 independent delay outputs
Range 0 to 20 seconds
Resolution 0.25 ps
Jitter 25ps RMS + delay x 10 -7 (external
trigger to any output) Annex B
20ps RMS + delay x 10 -7 (Channel
to channel) Annex B
< 5ps RMS for short delay
(Channel to channel)
Accuracy < 250ps + delay x 10 -7
Time base 200 MHz, 0.5 ppm
Trigger source
Internal
2 Timers tunable in Hz or ns
1Hz to 1MHz, 1Hz resolution
1µs to 4s, 5ns resolution
External Repetition rate < 1MHz
Prescaler : 1 to 2 16 -1
Trigger level, from 0.1 to 5V,
Internal load: 50Ω
Positive or negative slope
Minimum trigger delay < 60ns
Trigger mode
Single, repetitive or burst
Burst specs.
Pulse number: 2 to 2 16 -1
Period: 1000ns to 1s
Gate Mode
2 settings:
General or Individual
Gate source Active high, Rep rate <100kHz
Output T1 to T4 (Annex A)
Amplitude
2 to 5V, 0.1V resolution
Width 100ns to 10 µs, 5 ns resolution
Load 50 Ω
Rise time < 2ns max, 900ps typical
Fall time < 5ns max, 2ns typical
Connector BNC
Clock Input
Frequency
10 or 80 MHz, 50% duty cycle.
Ask factory for custom clock
frequency.
User Memory
Up to 4 sets of MOD745 parametes can be
stored/recalled via Front Panel or Telnet
General specifications
Size
215 x 245 x 135 mm
Power 50 W – 110 to 240 V
LEDs Orange: Trigger on
Software
Control panel Web page from embedded web
server for IE, Firefox or Chrome
Options
745-8C: 4-auxiliary delay output extension
Delay
Channels: 4 independent delay outputs
Range: 0 to 20 seconds
Resolution: 1.25ns
Jitter: 50ps RMS + delay x 10
-7
(External trigger to any output)
Accuracy: < 1ns + delay x 10
-7
Output (Annex A)
Amplitude: 2 to 5V
Width: 100 ns to 10ms; 5ns resolution
Load: 50Ω
Rise and Fall time < 5 ns
Connector: BNC on rear panel
-C: Clock output (10MHz, +/- 1 V, square)
-G: Gate input
-O: OCXO 50ppb
© Berkeley Nucleonics Corp. 6 Model 745 User Manual