21–
2658： When is turned, the frequency span changes in the specified step.
ZERO 200k 500k 1M 2M 5M 10M
20M 50M 100M 500M 1G 2G 5G FULL (8.5G)
■ Switching frequency band
2658 consists of the following three bands.
Frequency band Measured frequency range
Base band 50kHz to 3.5GHz
Band 1 - 3.3GHz to 6.3GHz
Band 1 + 6. 2GHz to 8.5GHz
The frequency band is selected to be the least band number, based on Center frequency and Span.
(At the span less than 200MHz, only one band is used.)
When the setting frequency range belongs to two bands, the lower band has priority.
Note: Switch frequency band allows only to automatic setting.
The frequency connection point of two bands is fixed as below table.
Two bands Frequency connection point
Base band and band 1 - 3.4GHz
Band 1 – and band 1 + 6.2GHz
Note: The trace may fall into disorder just a little at the frequency connection point. For the precise
measurement is needed, Center frequency or Span should be set so that the measured
frequency range is in one band.
9. Reference Level <REFER>
Press to switch over to the function screen shown below:
UNIT OFSdB IMP
dBm dBµV dBmV dBV 0.0 50Ω
REFE
F1 F2 F3
F4
F5
F6
[Hz]
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