Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

ASNT_PRBS43A40Gbps 2^7-1 PRBS Generator with USB Control Interface
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14ps Rise/Fall time for muxed PRBS data output
17ps Rise/Fall time for sync output
19ps Rise/Fall time for half-rate data outputs
VCO frequencies from 7.4GHz to 32.1GHz
User selectable clock divide by 2 to 512 sync output forscope triggering
GUI software interface with onboard USB

Figure 1. Block DiagramDESCRIPTION
The ASNT_PRBS43A can be used for test applications, design verification, and R&Denvironments. The 2^7-1 pseudo random bit sequence (PRBS) generator operates from 10kbps to40Gbps. Either an external half-rate clock, or a reference clock to the onboard PLL is needed togenerate the required data. Some output clock and data channels have adjustable phase andamplitude. The Sync output provides an oscilloscope triggering signal to view the data pattern orRev. 1.0.1

1May 2014

Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

eye diagram of PRBS7. A Windows GUI (compatible with Windows XP, 7, 8) is used to control theamplitude, phase, PRBS reset, divide ratio for sync, and clock input control through a USB-B
connector on the ASNT_PRBS43A. Power is supplied with an included AC-DC power supply. Alldata and clock connections shown in Figure 1 and Figure 2 are SMA female connectors.
The front panel of the instrument is shown in Figure 2. It contains 3 differential data outputs, 1
differential clock output, and a single-ended Sync output.

Figure 2. Front Panel

The back panel of the instrument is shown in Figure 3. It contains 1 external single-ended clock
input, 1 single-ended clock output, and a single-ended reference clock input. It also includes apower ON/OFF switch, and a +5V DC power supply (included) which connects to a male barrel
jack shown in Figure 3. The USB-B connector allows connection to a computer for controlling theinstrument through a windows GUI.

Figure 3. Back PanelRev. 1.0.1

2May 2014

Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

Data Outputs
There are 3 differential AC coupled data outputs:
Data Output CH1 has PRBS7 up to 20Gbps with a controllable 155ps of delay, amplitudecontrol from 0V to 1.6V differentially, and output duty cycle control from 40% to 60%.
Data Output CH2 has PRBS7 up to 40Gbps with amplitude control from 0V to 1.6Vdifferentially.
Data Output CH3 has PRBS7 up to 20Gbps with output amplitude of 0.8V differentially.

Clock I/O’s
There are 2 single-ended AC coupled clock inputs:
Clock Input 1 (Ref Clk In) is a reference clock input that needs at least 50mV of input
amplitude to drive the onboard PLL’s. The reference frequency range can be found in Table
1.
Clock Input 2 (Ext Clk In) is a half-rate clock input that may alternatively be used insteadof Clock Input 1 to provide any data rate from 1Mbps to 40Gbps by providing at least 50mVof input amplitude from 1MHz to 20GHz.
There are 2 AC coupled clock outputs:
Clock Output 1 (front panel) is a differential output ranging from 1MHz to 20GHz with an
adjustable delay up to 105ps, and amplitude of 0.8V peak to peak differentially.
Clock Output 2 (back panel) is a single-ended output ranging from 24.2GHz to 32.1GHzwith output amplitude of ~0.3V peak to peak.

Sync Output
Sync Output provides a selectable clock divided by 2*n with n integer values from 1 to 256
and an AC coupled single-ended output amplitude of 600mV. Sync Output can be connected
to an oscilloscope’s trigger to allow display of a PRBS7 pattern or eye diagram.

Note: All I/O’s are AC coupled.

Rev. 1.0.1

3May 2014

Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

Table 1. Clock/Data Table
INPUT
MODE

Clock
Input 1
(Ref Clk In)

OUTPUT

Clock
Clock Output
Clock
Data Output Data Output Data Output
Input 21Output 2
CH1CH2CH3(Ext Clk In) (front panel) (back panel)

VCO 2

Min
1.51251.5125

VCO 3

0.61875 0.80625--

9.912.9--

9.9

12.9

19.8

25.8

VCO 4

0.61875 0.80625-0.001204.450.001

6.4520--

4.45

6.45

9.90.001

20

4*

VCO 1

Ext ClockMax
2.00625
2.00625

Min Max Min
12.1
6.05

MaxMin

16.05

Max Min24.2 32.1 12.1

8.025

24.2 32.1 6.05 8.025 12.1 16.05 6.05

Max Min Max
16.05 24.2 32.1

Min12.1

Unit

Max
16.05 GHz/ Gbps
8.025 GHz/ Gbps

9.912.9GHz/ Gbps

12.9

4.45

6.45

400.00120

GHz/ Gbps
GHz/ Gbps

Note: 4* - Clock Input must be minimum of 2 GHz

ELECTRICAL CHARACTERISTICSPARAMETERMINTYPMAXUNITCOMMENTS

Clock Input 1 (Ref Clk In)
Single-ended Swing

50

Frequency

0.0001

300

600

mVPP

20GHz

Clock Input 2 (Ext Clk In)
Single-ended Swing

50

1000

mVPP

Frequency

7.4

32.1

GHz

See Table 1.

Clock Output 1 (front panel)
Differential Swing

1700

Frequency
0.001
Rise/Fall times
13
Duty Cycle
45
Delay Adjustment range

50105

mVPP
201555GHz
ps%
ps

Clock Output 2 (back panel)
Single-ended SwingRev. 1.0.1

3002504mVPP@ 25GHz@ 27GHzMay 2014

Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

150
200
Frequency
Duty Cycle

24.2
45

@ 29GHz@ 32GHz
32.1
55

50

GHz%

Data Output CH1
Differential Swing

0

Data Rate
0.001
Rise/Fall times
6Duty Cycle
45
Delay Adjustment range
Absolute delay Stability
-250
165

1700mVPP

201055Gbpsps%psps

2Adjustable
20% - 80%0-125°C

Data Output CH2Differential Swing

01700

mVPP

Adjustable

Data Rate
Rise/Fall times
Duty Cycle

4640401060Gbps
ps%

20% - 80%
Adjustable

8

Data Output CH3
Differential Swing
Data Rate
Rise/Fall times
Duty Cycle

12000.001
1345mVPP
20155550Gbps
ps%

20% - 80%

Sync Output
Frequency

0.0001

Single-ended Swing
Duty Cycle
Rise/Fall time

10600

47155017GHz
mVPP

5319%
ps

20%-80%ALL I/O's are AC coupledRev. 1.0.1

5May 2014

Advanced Science And Novel Technology Company, Inc.
27 Via Porto Grande, Rancho Palos Verdes, CA 90275
Offices: 310-377-6029 / 310-803-9284 Fax: 310-377-9940
www.adsantec.com

MECHANICAL DIMENSIONSPARAMETER TYP UNIT COMMENTS
Length164mm
Width129mm

Height58mm

REVISION HISTORY
Revision Date

1.0.1
1.0.0

Rev. 1.0.1

05-2014
03-2014

Changes

Added figure 2 and 3
Preliminary Release

6May 2014