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Agilent Technologies 81133A and 81134A, 3.35 GHz Pulse Pattern Generators Data Sheet
Key features
* Pulse, Data Pattern and PRBS generation from 15 MHz up to 3.35 GHz * Data formats NRZ, RZ and R1 * 12 Mbit pattern memory per channel * Low jitter, high accuracy * Fast transition times Figure 1: 81134A * PRBS generation from 25 - 1 ...231 - 1 * Delay control input for pre-defined jitter input * Jitter emulation up to 250 ps * Easy- to-use graphical user interface * 50 mV to 2 Vpp output amplitude * Differential Outputs * 1 or 2 channels
81133A and 81134A 3,35 GHz Pulse Pattern Generators
The need for pulse and pattern generation is fundamental to digital device characterization tasks. The ability to emulate the pulse and pattern conditions to which the device will encounter in its final application, is essential. This emulation should include both typical and worst case conditions. Accurate emulation requires superlative signal integrity and timing performance along with full control over parameters that allow specific worst case testing.
Setting Standards
The Agilent 81133A and 81134A 3.35 GHz Pulse Pattern Generators provide programmable pulse periods from 15 MHz (66.6 ns) to 3.35 GHz (298.5 ps) on all channels. With frequency ranges this fast, the transition time performance becomes critical; the Agilent 81133A and 81134A perfom at less than 60 ps tansition. With a RMS jitter of 1.5 ps (typ), the best signal quality is assured. The Delay Control Input and the Variable Crossover Point functionalities allow fast and easy Signal Integrity measurements, including emulation of real world signals by adding jitter to clock or data signals or by distorting the 'eye' for eye diagram measurements.
Connectors
Front Panel Connectors
All signal outputs and inputs are accessible at the front panel. These are: * 2 (or 4) Output Connectors for the 1 (or 2) differential channel(s) * Trigger Output * Clock Input * Start Input * 1 (or 2) Delay Control Input(s) for the 1 (or 2) channel(s)
Rear Panel Connectors
Remote programming interfaces: GPIB, LAN, USB 2.0 (see also `Additional Features')
dropouts in the range of 1:2. This can be used for applications, where dropouts would make a measurement impossible (e.g.: PLL frequency sweep, micro processor clock sweep). In both direct modes, the delay and deskew of all channels is set to zero (deskewed at the connectors) and can't be changed. Square mode, data mode (NRZ only) and PRBS mode (NRZ only) are available. In `Direct External' mode the PLL is bypassed and the instrument exactly follows the externally attached frequency.
Clock Source
Selecting the clock source determines the origin of the time base. All other timing parameters are derived from it. There are two choices:
Internal
The Clock is derived from the internal oscillator.
External
The Clock is derived from the external input. The ext. frequency is measured once and is thereafter used to maintain the calculated frequency dependant values including the pulse width or phase if set to duty cycle mode or phase mode respectively .
External 10 MHz Reference
A 10 MHz reference clock can be applied to the clock input. This clock is used as a reference for all timing parameters.
Direct Mode (Direct Internal/Direct External)
The direct modes allow changes of frequency without
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Frequency/Period
The main frequency is set for all channels. The frequency can also be set as period length. The frequency range is 15 Hz to 3.35 GHz, equal to 66.6m to 298.5 ps period. The frequency range can also be further divided individually for each channel. Available dividers are 1, 2, 4, 8, 16, 32, 64, 128.
Square
Generates a square wave (clock) of fixed width (50% duty cycle)
Pulse
Generates pulses with selectable width or duty cycle.
Data
Generates data in either RZ, R1 or NRZ format. In RZ and R1 mode, the pulse width can be selected as either width or duty cycle.
Main Modes
Pulse Pattern Mode
In Pulse Pattern mode, each channel can be set independently to one of the channel modes described in 'Channel Modes'.
PRBS
Outputs a selectable PRBS (Pseudo Random Binary Sequence) polynomial of either RZ, R1 or NRZ format. In RZ and R1 mode, the pulse width can be selected as either width or duty cycle.
Burst Mode
Burst mode enables the output of a burst consisting of data repeated n times followed by continuous zero data. It can be started either by: * applying a signal at the start input. * the start button. * sending a command through the remote connections.
Repetitive Burst Mode
This command selects a repeated burst consisting of data repeated n times followed by a pause of p times zeros of the same length as the data before the data is repeated.
Channel Modes
The following channel modes are available, if the instrument main mode is set to pulse/pattern: Note: The frequency of each channel can be optionally divided by 1, 2, 4, 8, 16, 32, 64, 128.
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Timing
Delay
The delay can be set: * as an absolute value in nano seconds or pico seconds. The delay remains unchanged as the frequency or the period is modified. * as phase (degrees relative to period). The phase remains unchanged as the frequency or the period is modified.
R1
Return to one pulse format. On 1 bit patterns, the signal remains at the high level. On 0 bit patterns, the signal goes low and back to the high level after the time specified by the pulse width or the duty cycle parameter.
NRZ
Non-return to zero pulse format. The signal remains at the low level or high level according to the bit level of the pattern for the entire period. NOTE: The pulse format selection is only available when operating the instrument in the data/pattern modes.
Deskew
The deskew adjustment allows for the compensation of e.g. cable delays. Deskew adjustment is not available in Direct Mode. In this case, all channels are factory deskewed at the front panel connectors.
Width
There are two ways to set the pulse width: * As absolute value in nano seconds or pico seconds. In absolute mode, the pulse width stays constant when the frequency or period is changed. * As duty cycle (percentage of period). In duty cycle mode, the duty cycle stays constant when the frequency or period is changed. NOTE: Width adjustment is not available if data mode is set to NRZ.
Pulse Format
RZ
Return to zero pulse format. On 0 bit patterns, the signal remains at the low level. On 1 bit patterns, the signal goes high and back to the low level after the time specified by the pulse width or the duty cycle parameter.
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Variable Crossover
For each channel, the cross over of the NRZ signal in PRBS or data mode can be adjusted. This is used to artificially close the eye pattern simulating distortion. Figure 1 shows the normal and complement output with cross over point set to 50% and 70% respectively. NOTE: Variable Crossover feature is available in NRZ mode only.
Data Polarity
In pattern mode the polarity of the data can be set to either normal or inverted. When set to inverted, a logical '1' will become a logical '0' at the output and vice versa.
Levels
Pre-defined Levels
Pre-defined levels allow the easy setup of the channels for commonly used logic families. These are: ECL, ECLGND, LVT, LVPCL and LVDS.
Custom Levels
50% Normal Out
50%
Compl. Out
Levels can be set to custom values in either of two ways: * low level and high level * amplitude and offset
70%
Level Protection
Normal Out Compl. Out
30%
Output levels can be limited to a user defined range to protect the device under test. Level protection can be switched on and off.
Figure 2: Variable Crossover
Level Polarity
Pattern
There are two types of patterns available:
Data
Arbitrary data up to the maximum available memory per channel can be setup as pattern data.
Level polarity can be set to either normal or inverted. Set to inverted, the low level and the high level values are interchanged.
Outputs Enable/Disable
Outputs can be switched on and off independently for each channel and for each normal/complement connector.
PRBS
Predefined PRBS of 25- 1 to 231-1 can be setup as pattern data.
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Auxiliary Channels
Outputs
Trigger Output The trigger output can be enabled or disabled. The levels of the trigger output can be set as high level or low level pair. The trigger output can be set to one of the following modes: * Trigger on clock The frequency of the trigger output is identical to the sys tem frequency. It can be further divided by n (n= 1, 2, 3, 4, 5, 6, 7...231-1). * Trigger on data One Trigger pulse occurs on the first part of the repetitive data pattern.
Store/Recall
Allows permanent storage of instrument settings, including all signal parameters and data settings. Data patterns up to 8K bit length are also stored. The instrument provides memory for 9 different settings. In addition, the 81133A and 81134A stores the current settings at shutdown and restored them on next power-on. For data patterns with more than 8K Bit length, it is recommended to use the special PC-based pattern editor.
Overprogramming
Many parameters can be programmed to values that exceed the specified ranges.
Inputs
Note: The built-in input and output terminations eliminate the need for external bias networks and prevent a degrading of the input/output sensitivity Clock Input The clock input can be `AC' or `DC' terminated. The `DC' termination voltage can be set. See also `Clock Source - external'. Start Input The start input can be used to start the instrument. After being armed, the instrument waits for the selected edge of the applied signal. Parameters: * Threshold (voltage) * Edge (rising/falling) * Termination voltage
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Specifications
Specifications describe the instrument's warranted performance. Non-warranted values are described as typical. All specifications apply after a 30 min warm-up with 50 Ohm source/load resistance. All specifications are valid from 0 C to 55 C ambient temperature if not stated otherwise.
Internal Clock Generation Period Range Period Resolution Frequency Range Frequency Resolution Accuracy
298.5 ps - 66.6 ns 6 digits, 0.001 ps best case 15 MHz - 3.35 GHz 1 Hz 50 ppm
Jitter Random Jitter (Clock Mode) Total Jitter (Data Mode)
<4 ps RMS (1.5ps typical) <5 ps RMS (2ps typical) (<30 ps pp (12ps typical))
Transition Times
The transition times can be modified by the `Pulse Performance' selector:
Channel Output Timing Number Of Channels Transition Times (10 % To 90 %) Transition Times (20 % To 80 %) Delay Variation Delay Resolution Delay Accuracy Phase Phase Resolution Skew Between Differential Outputs Maximum Skew Range Width Range Width Resolution Width Accuracy Duty Cycle Range Duty Cycle Resolution Divide By
1, (81133A), 2 (81134A) < 90 ps < 60 ps -5 ns to 230 ns 1 ps 20 ps -6000 to +279000 0.01, or 1 ps < 20 ps nominal 10 ns, 100 ps to (period - 100 ps) 1 ps 40 ps 0.15% - 99.85% 0.002 %, or 1 ps 1, 2, 4, 8, 16, 32, 64, 128
Note: Timing specifications are valid after auto calibration with a maximum temperature variation of 10 C.
Mode Fast Normal
Description
Smooth
Provides faster rise and fall times Standard setting 70 ps to 80 ps with guaranteed specifications Provides slower 80 ps to 120 ps rise and fall times and smoother edges
Typical TransitionTimes 60 ps to 70 ps
Human Interface
The graphical user interface enables the user to operate the instrument as simply as possible. All parameters are displayed on a color coordinated display. The instrument setup is intuitive. All important parameters can be easily accessed and modified with numeric keys, cursor keys or the twist and push button. A content sensitive online help enables users to set up their test configurations quickly and easily.
Channel Output Levels Amplitude Level Window Level Resolution Level Accuracy Amplitude Accuracy Settling Time Overshoot, Ringing Impedance Variable Crossover Maximum External Termination Voltage Short Circuit Current Limit Normal/Complement Disable
50 mV to 2.00 V -2.00 V to +3.00 V 10 mV 2 % of setting 20 mV 2 % 20 mV 1 ns <10 % 10 mV differential outputs 50 Ohm nominal 30% to 70% typical -2.00 V to +3.00 V -80 mA <= Isc <= 120 mA nominal High and low levels into 50 Ohm can be limited. Selectable Yes (relay)
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Data Generation Memory Depth Data Format
8Kbit per channel/12Mbit extended memory RZ / NRZ / R1
Pulse Pattern and Data Functionality
The 81133A and 81134A can generate an 8 KBit digital pattern in NRZ, RZ and R1 mode. Furthermore, the 81133A and 81134A can provide a hardware generated pseudo random binary sequence (PRBS) from 25 - 1 to 231 - 1 . Jitter Emulation (Delay Control Input) Full control over the signal quality of pulse and data signals provides the Delay Control Input. With an external modulation source (e.g. Agilent 33250A) the amount and shape of signal jitter can be varied for stress tests or to emulate real world signals. The external source for jitter modulation is applied to this input. Jitter modulation can be turned on and off individually for each channel. Either one of two fixed sensitivities can be selected 25ps or 250ps resulting in a total of 50ps or 500ps. The amplitude of the modulated jitter is set by the voltage level of the signal applied to the Delay Control Input. The Variable Crossover Point feature provides additional control over the signal quality.
PRBS PRBS 25-1 26-1 27-1 28-1 29-1 210-1 211-1 212-1 213-1 214-1 215-1 223-1 231-1
2n-1 , n = 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 23, 31 Polynomial Comment X5 + X4 + X2 + X1 + 1 X6 + X5 + X3 + X2 + 1 X7 + X6 + 1 X8 + X7 + X3 + X2 + 1 X9 + X5 + 1 X10 + +1 X11 + X19 + 1 X12 + X9 + X8 + X5 + 1 X13 + X12 + X10 + X9 + 1 X14 + X13 + X10 + X9 + 1 X15 + X14 + 1 X23 + 1 X31 + X28 + 1 X18 + CCITT 0.151 / ITU-T 0.151 CCITT 0.151 / ITU-T 0.151 X7 CCITT 0.153 / ITU-T V.52 CCITT 0.152 / ITU-T 0.152 ITU-T V.29
Trigger Output Amplitude Level Window Resolution Format Fixed Duty Cycle, Maximum External Voltage Transition Times (20% to 80% of amplitude) Minimum Output Frequency Mode Clock Clock divided by 1,2,3, . . Disable
50 mV to 2.00 V -2.00 V . . +3.00 V 10 mV 50% nominal - 2.00 V . . +3.00 V < 100 ps (< 60 ps typical) 15 MHz / Divider Factor 231-1 or trigger on bit 0 of data Yes (relay)
Delay Control Input Interface Impedance Input Levels For Full Modulation Range Max Input Levels Delay Modulation Range Modulation Frequency
dc-coupled 50 Ohm nominal 500 mV 2.5 V 250 ps, 25 ps, selectable 0 Hz - 200 MHz
300 200 100 0 -500 -100 -200 -300 Voltage at Delay Control In / mV -400 -300 -200 -100 0 100 200 300 400 500
Figure 2: Modulated Delay (Jitter) vs Voltage Level at Delay-ControlInput for 250ps and 25ps settings 8
Modulated Delay (Jitter) / ps
Figure 3
Clock Input Interface Impedance Termination Voltage Minimum Swing Maximum Amplitude Frequency Measurement Period Range Period Resolution Frequency Range Measurement Resolution Measurement Accuracy
ac-coupled with optional dc termination 50 Ohm -2.0 V . . +3.0 V 300 mV, tr < 3 ns, 50% duty cycle, sine: 0 dBm 3 Vpp , 5 Vdc Yes 299 ps . . 66.6 ns 6 digits, 0.001 ps best case 15 MHz . . 3.35 GHz 100 kHz 50 ppm
Start Input Modes Interface Impedance Termination Voltage Transitions Threshold Max. Level Window
Start 1 dc-coupled 50 Ohm nominal -2.0 V . . 3.0 V < 1 ns - 1.8 V to +4 V - 2 V to +5 V
1 No fixed latency between assertion of start signal and start of output signal
Propagation Delay Clock Input to trigger output 8.4 ns nominal, fixed Trigger Output to channel output 32 ns nominal variable
General Information Operating Temperature Storage Temperature Humidity Warm Up EMC Power Net Weight Shipping Weight Dimensions Recalibration Period
0C to +55C -40C to +70C 95% R.H. (0C to +40C) 30 Minutes Class A 100V to 240V AC nom.; 200 VA max.; 47 Hz to 63 Hz 14.8 kg (32.6 lbs) 19 kg (41.9 lbs) 145 mm x 426 mm x 553 mm (5.7 in x 16.75 in x 21.75 in) 3 years recommended
Additonal Features Remote Interfaces Store/Recall Registers (Non Volatile Memory)
SCPI over GPIB, LAN and USB 9 complete settings can be saved. The last settings are saved when power is turned off.
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Ordering Information
Agilent 81133A Agilent 81134A 3.35 GHz 1-channel Pulse/ Pattern Generator 3.35 GHz 2-channel Pulse/ Pattern Generator
Options Agilent 8113xA-UK6 Agilent 8113xA-1CP Agilent 1494-0059 Agilent N4871A
Commerical Calibration Certificate with Test Data Rackmount and Handle Kit Rack Slide Kit Cable Kit: SMA matched pair, tt=50ps (Recommended for high performance and differential applications)
Accessories Agilent 15435A Agilent 15432B Agilent 15433B Agilent 15434B Agilent 15438A
Transition Time Converter 150ps Transition Time Converter 250ps Transition Time Converter 500ps Transition Time Converter 1000ps Transition Time Converter 2000ps
Complimentary Products DSO80000/DCA_J 13/20 GHz 54655A 7 GHz 54854A 4 GHz Warranty and Service 3 years Return-to-Agilent (standard with every order) 5 years Return-to-Agilent Commercial Calibration for 5 years Standard Compliant Calibration for 5 years
Measurement Partner
The 6 GHz Infiniium 54855A real time oscilloscope combined with the InfiniiMax 1134A 7 GHz differential and single-ended active probes deliver the highest performance end-to-end measurement system available. With the 20 GSa/s sample rate on each channel, the 54855A is ideal for making signal integrity and jitter measurements for PCI Express, Serial ATA, Gigabit Ethernet, Fibre Channel and other high speed serial bus standards.
Related Agilent Literature
* Agilent Family of Pulse/Pattern
Generators, Brochure
Publication No.
5980-0489E
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* Agilent 81100 Family Pulse/Pattern,
Product Overview
5980-1215E
* Agilent 3.3GHz Pulse-/Pattern
Generators, Photocard
5988-5935EN
* Generating/Measuring Jitter with the
Agilent 81134A Pulse/Pattern Generator & 54855A Infiniium Scope, Product Note
5988-9411EN
* Agilent 81133A/81134A 12 Mbit
Extended Pattern Memory, Product Note
5988-9591EN
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5988-5549EN
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