Specifications

All specifications are typical unless noted otherwise.

OUTPUT SIGNAL

The following notes apply to the output signal characteristics:

• The output characteristics apply to the Ch1 and Ch2 outputs.
• Ch1 and Ch2 are independent.
• True and complement outputs share the same settings. Differential values (true minus complement) are double those stated.
• The output is designed to drive into a 50 Ohm load terminated to a user-provided voltage. The termination voltage must be in the range specified. For the generator to display accurate levels, the user must enter the actual termination voltage.
• Each channel has independent delay and duration settings.

AmplitudeRange50 mV to 2.5 V, within level windowResolution3 digits (1 mV best case)Accuracy±(50 mV + 1%), 50 Ω to 0 V terminationLevel windowRange-2.0 V to +3.3 VResolution3 digits (1 mV best case)OffsetRange-1.975 V to +3.275 V, within level windowResolution3 digits (1 mV best case)Accuracy±(50 mV +2%), 50 Ω to 0 V terminationTermination voltageRange-2.0 V to +3.3 VResolution3 digits (1 mV best case)Baseline noise, RMS1 mVOvershoot/Preshoot/RInging±(5% + 50 mV), at 25 °CSignal rise/fall time150 ps, 10 - 90 %Width/DurationRange250 ps to (period-250 ps), May be set as duration or duty cycleResolution4 digits, 1 ps best caseAccuracy±(100 ps + 1%)Jitter RMS (trigger out to trailing edge)< 10 ps, Pulse mode, jitter insertion disabled, delay = 0 DelayRange0 ps to periodResolution4 digits, 1 ps best caseAccuracy±(50 ps + 1%), Relative to 0 delay settingJitter RMS (trigger out to leading edge)< 10 ps, Pulse mode, jitter insertion disabledOutput impedance50 Ω

INTERNAL CLOCK

The following notes apply to the internal clock characteristics:

• The clock source is shared between both channels.
• Some modes of operation (burst, pulse with external trigger, RZ/R1 patterns) are only specified to 800 MHz. However, over-programming is allowed for these modes, and some will work to frequencies higher than 800 MHz.
• Spread spectrum clocking and internal clock modulation sinusoidal jitter cannot be used at the same time.

FrequencyRange15 MHz - 1.6 GHz, Can be set as frequency or periodResolution1 HzAccuracy±100 ppmRMS Jitter (int ref, int clock, cycle-to-cycle)<10 ps, With jitter insertion disabledPulse/Pattern clock sourceInternal Clock or “Clk In”Spread spectrum clocking1 kHz - 100 kHz, 0% to 2%; Triangular wave frequency modulation of the clock at a specified frequency and % amplitude below nominal selected clock frequency

PATTERN MODE

PatternTypesData, PRBSPRBS length2n - 1 with n = 5, 6…15, 23, 31 Pattern length resolution8 bitsMemory depth16 Mbit, per channelData formatsNRZYes, programmable crossing pointRZ, R1Yes, programmable duration/duty cycleRZ, R1 max repetition rate800 MHz, up to 1.6 GHz for NRZ data and 800 MHz for RZ, R1 dataCrossing point adjustmentFor NRZ format only. Calibrated for 50% duty cycle data signals.Range30 - 70%Resolution1%

BURST MODE

The following notes apply to the Burst mode characteristics

• Each channel has independent number of pulses and common burst period.
• See the Burst mode screen under Typical performance.

Burst count2 - 1,048,576 pulses, number of pulses in burstBurst periodRange8 - 1,048,576 clocks, number of clock cycles in a burst. Must be ≥ number of pulses.Resolution8 clocks, clock cyclesMaximum repetition rate in Burst mode800 MHz

JITTER INSERTION

The following notes apply to the Jitter insertion specifications:

• The pulse generators are capable of generating jitter from two different mechanisms, modulation of the internal clock source or output channel delay modulation.
• Delay modulation sources can be either internal or external. External delay modulation is applied via an analog signal on the delay inputs (separate for each channel).
• Modulation of the internal clock is applied to both channels of a two-channel instrument.
• Delay modulation jitter may be applied to each channel independently with the ability to apply different jitter functions to each channel.
• Internal clock and delay modulation jitter can be applied in any combination. The combined peak-to-peak amplitude of delay modulation jitter (deterministic waveforms, random, and external) is limited to 0.5 UI.
• The trigger output is also subject to the internal clock modulation jitter but not delay modulation jitter.
• The bandwidth of the delay modulation jitter depends on the clock frequency. Below 300 MHz clock frequency, the delay modulation jitter insertion bandwidth will be reduced. Jitter insertion signal frequencies approaching ½ of the clock frequency or higher are not recommended and can result in unexpected behavior (due to in-band mix products / undersampling).
• Spread spectrum clocking and internal clock modulation sinusoidal jitter cannot be used at the same time.
• The following figure shows a plot of the limit points (linearly interpolated on a log-log scale between stated frequency points) for internal clock modulation sinusoidal jitter:
  
  

Internal clock modulation sinusoidal jitter (peak-to-peak)Jitter amplitude range is from 0 ns to the values at the specified frequencies. Between the frequencies, the limit points are interpolated linearly on log-log scale plot. Please refer to the Clock Modulation plot.10 kHz & 30 kHz40 ns3 MHz & 10 MHz0.6 nsDelay Modulation JitterSee the bandwidth note above.Deterministic waveforms

Square (peak-to-peak), 1 Hz to 20 MHz: 0 to 0.4 UI

Triangle (peak-to-peak), 1 Hz to 4 MHz: 0 to 0.5 UI

Sine (peak-to-peak), 1 Hz to 20 MHz: 0 to 0.5 UI (See Sine Delay Modulation Jitter Insertion figure above for an example.)

Random jitter Gausian noise (RMS)80 MHz BW: 0 to 0.08 UI (See Random Delay Modulation Jitter Insertion figure above for an example.)External input (peak-to-peak)80 MHz BW: 0 to 0.5 UI (±1 V maximum useable input with 2 V peak-to-peak input corresponding to peak-to-peak jitter of 0.5 UI. See the bandwidth note above.)

TRIGGER TYPES

When in Pulse mode ContinuousOne pulse per period of the internal clock or Clk InExt In, EdgeOne pulse per valid edge on the Ext In input. The latency between the Ext In signal and the output signal is repeatable (deterministic) and is adjustable with the delay control. The Ext In signal can vary from single shot to 800 MHz. Clk In is not used.Ext In, LevelThe active Ext In level enables continuous pulses. The Pulse period is set by internal clock or Clk In. The clock frequency is limited to 800 MHz. The latency between trigger source and signal output is not fixed or deterministic.Remote/ManualA trigger command from the remote interface or front panel generates a single pulse. Clk In is not used.When in Burst or Pattern modeContinuousTrigger circuitry is always armed. Clock can be internal or Clk In. Bursts or Patterns are continuously generated.Ext In, EdgeThe active transition on Ext In generates one burst or pattern. The Burst or Pattern pulse period is set by internal clock or Clk In. There is no fixed latency between trigger source and signal output.Ext In, LevelThe active Ext In level enables continuous bursts or patterns. On an inactive input level, a burst or pattern in progress will finish before halting. The Burst or Pattern pulse period is set by internal clock or Clk In. The latency between trigger source and signal output is not fixed or determinant.Remote/ManualA trigger command from the remote interface or front panel generates a single burst or pattern. The Burst or Pattern pulse period is set by internal clock or Clk In.When in External width modeNo triggeringOutputs follow the Ext In signal. The trigger output is not active.

INPUTS

Front panel inputsSMA jacks, 50 Ω impedanceRear panel inputBNC jack, 50 Ω impedanceClk InAccepts external clock to set the pulse period. AC coupled signal with selectable AC or DC coupling of the termination.Termination voltage-2 V to +3 V (active only for DC coupled termination)Input absolute limits2.6 V maximum AC peak-to-peak, -2 V to +3 V DCInput frequency15 MHz - 800 MHz except for NRZ Pattern, then 15 MHz - 1.6 GHzExt In

Accepts external signal to start or gate the burst/pattern or the trigger pulse, DC coupled.

Termination voltage-2 V to +3 VInput threshold-2 V to +3 VInput absolute limits-3 V to +4 VInput frequencyDC to 800 MHzDelay In (1 and 2)

Accepts external signal for jitter insertion on channels 1 & 2. 50 Ω, DC coupled.

Voltage range-1 V to +1 VInput absolute limits±5 VREF IN (rear panel)Reference oscillator input accepts external 10 MHz signal for timebase reference.Termination voltageAC Coupled, 50 ΩInput amplitude0 dBmInput absolute limits4 V maximum AC peak-to-peak, ±10 V DC

OUTPUTS

Front panel outputsSMA jacks, 50 Ω impedanceRear panel outputBNC jack, 50 Ω impedanceOUT 1 and /OUT 1 Output 1 is the Channel 1 signal output; /Output 1 is the Channel 1 complement signal output.OUT 2 and /OUT 2 Output 2 is the Channel 2 signal output; /Output 2 is the Channel 2 complement signal output.Trig OutGenerates trigger pulse corresponding to each output pulse or start of burst or pattern, DC coupled.Adjustable amplitude range50 mV to 2.5 VAdjustable offset range-2 V to +3.3 V window

OUTPUT MODES

Pulse modePulse mode delivers a single pulse per trigger event. The pulse timing is programmable in repetition rate, duration, and delay.Pattern modePattern mode delivers a defined pattern per trigger event. The pattern may be presented in either NRZ, RZ, or R1 formats. In NRZ mode the crossing point is programmable. In RZ and R1 mode the duration of the pattern pulse is programmable.Burst modeBurst mode delivers a ‘burst’ of n pulses per trigger event.External width modeExternal width mode delivers pulse levels that follow the edges of the “Ext In” input. A rising edge causes the output to go high, while a falling edge causes the output to go low.

GENERAL CHARACTERISTICS

REF OUT (rear panel)Reference oscillator output, generates 10 MHz signal phase locked to instrument timebase.Signal amplitude (peak-to-peak)1.4 VRef Osc output impedanceAC coupled, 50 ΩInterfacesThe PSPL1P601 and PSPL1P602 generators can be controlled by either the front panel GUI interface, a GPIB interface, or a USB interface. IEEE 488.2, SCPI compliant.Mechanical dimensionsSize: 439 mm (17.3 in) wide x 87 mm (3.4 in) high x 421 mm (16.6 in) deepTemperatureOperating Ambient Temperature: 0 to 50 °C

Specifications apply from 0 to 50 °C unless otherwise noted.

All ventilation openings must allow unobstructed flow of ambient air.

WarrantyOne year