LOCAL OPERATION
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Error message field
Error messages are displayed here when, for example, you exceed a parameter limit. A list of
error messages is given at the end of this chapter.
Soft key fields
These fields can hold up to 12 soft key labels. Some soft keys are used to select a field for data
entry (e.g. [Carrier Freq]), in which case the soft key label will remain highlighted after being
pressed to show that any subsequent data entry applies to that function.
Other soft keys may perform an action (for example, turning the modulation on or off), in which
case the label will flash to acknowledge the key-press.
Some soft keys cause another menu to be displayed, in which case there is no highlighting or
flashing of the label, the change of menu acknowledges the key
-press.
Selecting functions and keyboard entry
Whenever one of the main functions − carrier frequency, RF level, modulation − is highlighted on
the main screen, making any terminated numerical entry will be accepted as being a changed
parameter for that function. This enables you to enter, for example, a sequence of carrier
frequencies without having to re
-press the [Carrier Freq] key for each entry.
First of all, select the A source for adjustment by pressing the [A] key.
Carrier frequency
(1) Press the [Carrier Freq] soft key to select carrier frequency as the current function. The key
label is highlighted so that the line bordering the label is increased in thickness to about
1 mm. Data entered on the key pad will now be recognized as a frequency setting and
replaces the current setting.
(2) Enter 100 MHz by entering 100 on the numerical key pad and terminating with [MHz].
Observe that the Carrier Freq: display changes to 100.000 000 MHz.
If you make an error when keying in, press the function key again and key in the correct value. If
this causes an error message (e.g. Err 1100: Carrier Limit) to be displayed, it can be canceled by a
correct entry (e.g. by entering a value which is within limits).
RF level
(3) Press [RF LEVEL] (which causes its key label to be highlighted) to select RF level as the
current function.
(4) Enter 10 dBm by entering 10 on the numerical key pad and terminating with [dB]. Observe
that the RF Level: display changes to
+
10.0 dBm.
(5) Press the [RF ON/OFF] key for the A signal source. Repeated pressing toggles between the
on and off states as shown by A
Ö O/P ON and OFF in the A source panel. Select ON. A
100 MHz, 10 dBm carrier is now being generated from the A source RF OUTPUT socket.
Modulation
(6) Press [FM Devn]. Enter 100 on the key pad and terminate with [kHz]. 100 kHz is displayed
in the modulation field.
(7) Press [FM Mod Freq]. Enter 500 on the key pad and terminate with [Hz]. ModF: 500.00 Hz
is displayed .
(8) Press[Mod ON/OFF]. Repeated pressing toggles between the on and off states as shown by
Modulation ENABLED and DISABLED at the centre of the screen. Select Modulation
ENABLED.
(9) Press [FM ON/OFF]. Repeated pressing toggles between the on and off states as shown by
ON and OFF on the screen. Select ON. A 100 MHz, 10 dBm carrier is now being generated
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General