6
CHANnel Subsystem
182
Keysight 8990B Programming Guide
Remarks
– The channel scale will be displayed as dB/div if the channel unit is set to dBm,
and W/div if the unit is set to W.
– If there is a change to the channel unit, the channel scale will reset to its
default value.
– This command is only applicable for channels 1 and 4 to configure the unit as
DBM or WATT. If a unit other than DBM and WATT is specified, error
–224,“Illegal parameter value” will occur.
– If channel 1 or 4 is not connected, error –241,“Hardware missing; Sensor is not
found in channel <channel>.” will occur.
Reset condition
On reset, the channel unit is set to dBm for channels 1 and 4, and V for channels 2
and 3.
Query
CHANnel{1|4}:UNIT?
This query returns the current setting of the unit as
DBM
or
WATT
for the specified
channel.
Query example
CHAN2:UNIT?
Queries the unit for channel 2.
Содержание 8990B
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