BNC 645 - Manual (Page 98)

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-221 Settings conflict; trigger output connector used by FSK
If you have enabled FSK and is using the external trigger source, the
Trig Out signal is automatically disabled.
-221 Settings conflict; trigger output connector used by trigger
external
When using the external trigger source, the Trig Out signal is
automatically disabled.
-221 Settings conflict; frequency reduced for user function
The maximum output frequency for arbitrary waveform is 10 MHz.
When you change function from one allowing higher frequency to
arbitrary waveform, the frequency is adjusted to 10 MHz.
-221 Settings conflict; frequency changed for pulse function
The maximum output frequency for pulse waveform is 5 MHz. When
you change function from one allowing higher frequency to pulse
waveform, the frequency is adjusted to 5 MHz.
-221 Settings conflict; frequency reduced for ramp function
The maximum output frequency for ramp waveform is 200 kHz.
When you change function from one allowing higher frequency to
ramp waveform, the frequency is adjusted to 500 kHz.
-221 Settings conflict; frequency made compatible with burst
mode
The maximum output frequency for an internal-triggered burst is
2.001 mHz. The waveform generator has adjusted the frequency to
be compatible with the current setting.
-221 Settings conflict; burst turned off by selection of other
mode or modulation
Only one modulation can be enabled at one time.
-221 Settings conflict; FSK turned off by selection of other mode
or modulation
Only one modulation can be enabled at one time.