Atec Rohde-Schwarz-SMJ100A - Manual (Page 22)

R&S ® SMJ100A Vector Signal Generator Version 05.00, December 2007 22
In internal clock mode, a trigger event
restarts the clock generation. The clock
phase is then synchronous with the trigger
(with a certain timing uncertainty).
In external clock mode, the trigger event is
synchronized to the symbol clock.
operating mode internal, external
modes Auto, Retrig, Armed Auto, Armed Retrig
setting uncertainty for clock phase related
to trigger in internal clock mode <18 ns
external trigger delay
setting range 0 sample to (2 16 – 1) sample
resolution
internal clock mode 0.01 sample
external clock mode 1 sample
setting uncertainty <5 ns
external trigger inhibit 0 sample to (2 26 – 1) sample
setting range
resolution 1 sample
external trigger pulse width >15 ns
Triggering
external trigger frequency <0.02 × sampling rate
number 4
level LVTTL
operating modes
control list, restart, pulse, pattern, ratio
marker delay (in sample)
setting range 0 to (2 24 – 1)
setting range without recalculation 0 to 2000
resolution of setting 0.001
Marker outputs
setting uncertainty <10 ns
Internal or external via LEVATT input. The
signal switches between nominal and
reduced level (without edge shaping). If an
internal LEVATT signal is used, the
connector is used as an output.
setting range 0 dB to 60 dB
additional level error in case of reduction
up to 30 dB <1 dB
Level reduction
up to 50 dB <3 dB
Internal or external via BURST input. The
signal triggers the beginning of a power
ramp. The positive edge starts power
ramping from blank to full level, the
negative edge ramping in the opposite
direction from full level to blanking. If an
internal BURST GATE signal is applied,
the connector is used as an output.
operating range max. 5 MHz
rise/fall time
setting range 0.5 symbol to 16 symbol
resolution 0.1 symbol
Burst
ramp shape cosine, linear
The input impedance and trigger threshold
can be set separately for the trigger and
the clock/data inputs.
input impedance 1 k Ω, 50 Ω
trigger threshold
setting range 0.00 V to 2.50 V
Trigger/clock/data inputs
resolution 0.01 V
Clock/data outputs level LVTTL