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DATA
DATA NUMBER/UNITS KEYBOARD
The DATA number/units keyboard (or DATA keyboard) allows exact value entries to center frequency, frequency
span (or start/stop frequency), reference level, log scale, marker positions, display line, threshold, and the COUP-
LED FUNCTIONS.
An activated parameter is changed by entering the number (with the CRT display providing a readout) then
selecting the appropriate units key. The value is not changed (entered) until the units key is pressed.
The number portion of the entry may include a decimal,
number. Corrections to number entries are made with :::,:
Example:
With center frequency activated,
will set the center frequency to 1.250 GHz.
If the units key were pressed without a number entry, 1 is entered (except in zero frequency span).
Negative DATA Entry
Negative entries from the number units keyboard can be made for power and frequency but not time and voltage.
Negative power entries can be made using -Z . The " - dBm" key will enter - dBm, - dBmV or - dBpV For
example, in reference level, with the dBmV units, an entry of
Negative frequency entries can be made using m-m
as a prefix to the frequency entry For example, to enter a negative start frequency, press
This enters the frequency value as - 100 MHz.
Not all functions will accept negative entries (the sign will be ignored).
MULTIPLE DATA CHANGES
A function, once activated, may be changed as often as necessary without reactivating that function (see Chapter
3, FUNCTION). Any of the DATA controls can be used in any order.
It is not always necessary to make a DATA entry. For example, start and stop frequency may be activated simply to
allow readout of the left and right display reference frequencies as start/stop frequencies.
Exceptions are the SHIFT KEY FUNCTIONS which use only DATA number/units keyboard. See Chapter 11.
l
DATA NUMBER/UNITS KEYBOARD
l
, which erases the last digit for each press.
will enter - 50 dBmV
l
0
Manual Operation
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