User manual

RIGOL Chapter 1 Quick Start
1-12 DSG800 User's Guide
2. External Modulation Input Connector
When the modulation source of AM or FM/ØM is
set to "Ext", this connector is used to input the
external modulating signal.
3. Signal Valid Output Connector
When the RF output frequency or amplitude is
modified, after a certain response and processing
time of the internal circuit of the instrument, the
instrument outputs RF signal with the specified
frequency and amplitude via the RF output
connector at the front panel. During this process,
the [SIGNAL VALID] connector outputs a pulse
sync signal, indicating that the RF output signal is
valid.
— High Level (+3.3 V): indicate that the RF
signal is in configuration.
— Low Level (0 V): indicate that the RF signal is
stable (namely, the signal is valid).
3.3V
0V
Power-on Time
RF Valid
Configuration
Time
Configuration
Time
RF Valid
… …
V
T
4. External Trigger Input Connector
When the trigger mode of SWEEP is “Ext”, this
connector is used to input the external trigger
signal. You can press Trig Slope to set the
polarity of the trigger signal to "Pos" or "Neg".
When the pulse modulation source is "Int" and the
trigger mode is "Ext Trig", it is used to input the
external trigger signal.
When the pulse modulation source is "Int" and the
trigger mode is "Ext Gate", it is used to input the
external gated signal.