Specifications
Table 28: Trigger (cont.)
Characteristic Description
For Power Trigger:
± (Power Trigger Position Timing Uncertainty + 5 ns);
All conditions for Power Trigger Position Timing Uncertainty must be met
For FMT:
± (Frequency Mask Trigger Timing Uncertainty + 5 ns);
All conditions for Frequency Mask Trigger Timing Uncertainty must be met
For DPX Density Trigger:
±50 ms;
For External Trigger SPAN 40 MHz:
±(External Trigger Timing Uncertainty + 20 ns);
All conditions for External Trigger Timing uncertainty must be met
For External Trigger 40 MHz < SPAN 85/165 MHz:
±(External Trigger Timing Uncertainty + 5 ns);
All conditions for External Trigger Ti ming Uncertainty must be m et
Holdoff Trigger Time Accuracy,
nominal
If Time Qualified Trigger is used, the Accuracy value increases to 2X the number given
above for the specified trigger source.
External Trigger 1 Threshold Voltage,
nominal
Variable: –2.5 V to +2.5 V settable
External Trigger 2 Threshold Voltage,
nominal
Fixed: TTL
External Trigger 1 Threshold Voltage
Setting Resolution, nominal
0.01 V
External Trigger 1 Input Impedance,
nominal
Selectable: 50 or 5 k
External Trigger 2 Input Impedance,
nominal
Fixed: 10 k
External Trigger 1 Minimum Pulse
Width (applies to 50 Impedance
only), nominal
>5 ns
External Tr igger 2 to External Trigger
1 Minimum Delay, nominal
>20 ns
This is the time from the rising edge of the external gate signal to the rising edge of the
external trigger signal needed to guarantee a trigger will be accepted. This specification
also applies from the falling edge of the external trigger signal to the falling edge of the
external gate signal.
External Trigger 1 Timing Uncertainty (50 impedance only)
>80 MHz to 165 MHz acquisition
BW
±11 ns
>40 MHz to 80 MHz acquisition
BW
±13.5 ns
>20 MHz to 40 MHz acquisition
BW
±20 ns
38 RSA5100B Series Technical Reference
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