Specifications

Operating Manual SEFRAM 4451
M4451 A00
53
4.12.1.18 Trailing Edge Time
This command is used to set the value of the trailing edge time. If the edge-tracking feature is
ON, changing the trailing edge will cause the same change in the leading edge. Refer to 2.1.19
for the tracking control command.
COMMAND TYPE: Setting or Query
SETTING
Syntax: [:SOURce]:PULSe:TRANsition[:TRAiling]<ws><trail time>[units]
Arguments:
Type: NRf
Units: S (seconds), MS (milliseconds), US (microseconds), NS
nanoseconds
Range: 5NS to 10MS
Rounding: To current resolution
Examples: :PULS:TRAN:TRA 50NS
:PULS:TRAN:TRAiling 85NS
QUERY
Syntax: [:SOURce]:PULSe:TRANsition[:TRAiling]?
Examples: :PULS:TRAN:TRA?
Response: NRf
CONSIDERATIONS:
The allowed value of the trailing edge time is limited by the values of the period, width
and delay. In addition, the ratio between the transition times is limited to a maximum of
20:1, and both transition times must be in one of the following ranges:
5ns to 100ns
50ns to 1 us
500ns to 10us
5us to 100us
50us to 1ms
500us to 10ms
4.12.1.19 Transition Time Tracking
The SEFRAM 4451 enables the transition times to be either independent of each other, or to
track each other. With tracking set to ON, setting one of the transition times will cause the other
transition time to be set to the same value. When the tracking is off, each transition time is set
independently of the other. In addition to the tracking being set ON or OFF, the transition times
can be made equal to each other using the ONCE parameter. In this case a single-shot tracking
is effected. When going from tracking OFF to ON, the trailing edge is made to follow the
leading edge.
COMMAND TYPE: Setting or Query
SETTING
Syntax: [:SOURce]:PULSe:TRANsition:TRAiling:AUTO<ws><Option>
Arguments:
Type: Boolean or Character
Examples: :PULS:TRAN:TRA:AUTO OFF
:PULS:TRAN:TRA:AUTO ONCE
QUERY
Syntax: [:SOURce]:PULSe:TRANsition:TRAiling:AUTO?
Examples: :PULS:TRAN:TRA:AUTO?
Response: 0 | 1
4.12.1.20 Pulse Polarity