6
CHANnel Subsystem
170
Keysight 8990B Programming Guide
Remarks
– This command is only applicable for channels 1 and 4. If a channel other than
channel 1 or 4 is specified, error 700,“Applicable to channel 1 and 4 only” will
occur.
– If the frequency is set to less than 500 MHz when the video bandwidth is set to
medium or high, error –221,“Settings conflict;Frequency less than 500 MHz.
Video bandwidth has been set to LOW” will occur.
– If you set a frequency value which exceeds its minimum or maximum limit, the
value will be clipped to its minimum or maximum value respectively. Error
–222,“Data out of range;Value clipped to minimum (#)” or –222,“Data out of
range;Value clipped to maximum (#)” 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 frequency is set to 1 GHz.
Query
CHANnel{1|4}:FREQuency?
This query returns the current setting of the frequency for the specified channel.
The response format is
<NRf>
.
Query example
CHAN1:FREQ?
Queries the frequency setting for channel 1.
Summary of Contents for 8990B
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