81133A Datasheet, PDF (3/10 Pages) Keysight Technologies – 3.35 GHz Pulse Pattern Generators

03 | Keysight | 81133A and 81134A, 3.35 GHz Pulse Pattern Generators - Data Sheet
Frequency/Period
Timing
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 66.6μ 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.
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’.
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.
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.
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.
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
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.
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.
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.
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.
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.