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BK Precision 4070A User Manual Rev.2.2
11
4.0 Operating guide
Turn 4070A on. After a display of the hardware and software versions and serial number, the unit enters the Basic
Sinewave mode of operation. The 4070A defaults to generating a 1.0 MHz sinewave at a level of +10.0 dBm.
4.1 Changing frequency
To change the frequency, press the Right Field Arrow button once. The cursor will move to the frequency field.
A flashing digit indicates the cursor position.
You can change the frequency two different ways. You can enter a new value or you can modify the current value.
To enter a new value, type in the frequency using the numeric keypad. Then press the MHz key for MHz, or the
KHz key for KHz, or the Hz key for Hz. The unit will make a two beeps sound to indicate that a new frequency
value has been accepted.
To modify an existing value, use the è and ç keys to position the cursor over the digit you wish to change.
Then press the é or ê key to increment or decrement that digit. Alternatively, you can turn the rotary knob
clockwise or counterclockwise to adjust the digit's value.
4.2 Changing level
To set a new output level, press the Right Field Arrow button until the cursor flashes on the right hand side where
the level is displayed. You can change the level two ways. You can type in a new value or adjust it with the wheel
or arrow keys. To enter a new level, type in the new level value using the numeric keypad. For a negative dBm
value, press the - key while entering the value. Finally, press the dBm key to enter the value as dBm or the Vp-p or
mVp-p keys to enter the new value as a peak-to-peak voltage.
NOTE: The level you're entering here is considered a loaded level, i.e. the level that will appear across a 50O load
connected to the output.
To modify an existing level value, use the è and ç keys to position the cursor within a field. Place the cursor
over the digit you wish to change and press the é or ê key to increment or decrement the digit. Alternatively, you
can turn the rotary knob clockwise or counterclockwise to adjust the digit's value.
4.3 Changing operating modes
To select another operating mode, press the red Mode key once. When pressed, the LCD display is cleared and the
question Mode? is displayed. The Mode key acts as a shift type key in that the meaning of each button on the front
panel changes to that described by the blue wording beneath it. To enter the SWEEP mode, for example, first press
the Mode key and then press the number 4 key.
You can then use the Field Arrow keys to move the cursor to the parameter you wish to change. Each numeric
value can be entered or modified in the same manner described above. This manual contains a separate chapter for
each mode, which describes in detail all parameters on the LCD display. User could switch to other generating
modes by pressing One Touch Mode Selection key or “Mode” key for more options.
4.4 Operating mode selection.
If you wish to select a new operating mode for the 4070A, press the red Mode key once. When pressed, the LCD
display is cleared and the question Mode? is displayed. The Mode key acts as a shift type key in that the meaning
of each button on the front panel changes to that described by the red wording beneath it. To enter Sweep mode, for
example, first press the Mode key and then press the number 4 key.
You can exit this question either by pressing the blue Mode key again or by pressing any key that does not have
red text beneath it. The 4070A will then return to the current mode unchanged.
Some modes are available on the 4070A that are not printed on the front panel. To access these modes, press the
Mode key, and then the key labeled "Other" (Clear key) to bring up a scroll menu, which displays the additional
modes. You can scroll through the list with the arrow keys or the wheel. To select one of these modes, enter its
menu number. User could switch to other generating modes by pressing One Touch Mode Selection key or “Mode”
key for more options.