B&K Precision 2640 - Manual - Manual (Page 77)

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No. 5 [MULTI]
 Push the No. 5 key to input the value of 5.
Push the No. 5 Key to input the value of numeral 5 in the Start/
Stop /Scan/ Center frequencies.
 Multi Power Meter Adjustment Function after pushing Shift
Key
On pushing the Shift key and then pushing the No. 5 key is
pushed, Multi Power Meter function can be selected
[Please refer to the Multi Power Meter section for a details description
for using the Power Meter if needed.]
No. 6 [UNIT]
 Push the No. 6 key to input the value of 6.
The No. 6 Key is used to input the value of numeral 6 in the
Start/Stop/Scan/Center frequencies.
 Level Unit Adjustment Function after pushing Shift
Key
By pushing the Shift key and then pushing No.6 key, Level
Unit function can be selected.
[Please refer to the Level Unit section for a detailed description of basic
operation if needed.]