Keysight X-Series Manual page 84

Error Messages
List of Error Messages
-221 Settings conflict; The puncture rate is > 60 on {name} channel
-221 Settings conflict; The puncture rate is >= {value} percent on DCH Ch
-221 Settings conflict; QPCH and FFCH/OCNS cannot be on at the same time.
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A pulse period has been entered that is smaller than the pulse
width. The instrument automatically adjusts the pulse period to
match the pulse width.
{value}, increase the {name} Slot Format or edit the {name} fields to
reduce the puncture percent.
The puncture rate of each TrCH should be smaller than 60%, which is
displayed on UI screen as "Max Puncture" value. Max Puncture is
calculated as (1 - Puncturing Limit) * 100. Puncturing Limit is
defined at 3GPP STD TS 125 331. To avoid the error, increase the
symbol rate of physical channel, decrease the number of bits of the
TrCH, or align the rate matching attribute of each TrCHs.
{value}, increase the DPCH Slot Format or edit DCH fields to reduce
the puncture rate. All DPCH channels were turned off.
Transport channels cannot be punctured more than X%. The slot
format needs to be increased (which in turn increases the symbol
rate) on the underlying DPCH channel, or the transport channel
parameters must be changed to reduce the puncture percentage. The
underlying DPCH channel has been turned off.
FFCH/OCNS has been turned off.
QPCH is generated using both channel 3 and 4. Channel 4 is now used
to generate QPCH. Channel 3 can no longer generate FFCH/OCNS.
Therefore, FFCH/OCNS must be turned off.
Keysight X-Series Signal Generators Error Messages