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.
The Keysight Technologies, Inc. 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 Keysight 81133A and 81134A perform at less than 60 ps transition. 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.
- 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
- 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
Front panel connectors
All signal outputs and inputs are accessible at the front panel.
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’)
Selecting the clock source determines the origin of the time base. All other timing parameters are derived from it.
There are two choices:
The Clock is derived from the internal oscillator.
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 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.
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