FIRST-TIME USE
4-12
Selecting functions and keyboard entry
Whenever one of the main functions − carrier frequency, RF level, modulation, modulation source
− is highlighted on the main screen, any terminated numerical entry is 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 [CARR FREQ] function key for each entry.
Carrier frequency
(1) Press [CARR FREQ] to select carrier frequency as the current function. Carr Freq is
highlighted on the screen.
(2) Using the numerical key pad, enter 100 MHz by entering 100 on the key pad and terminate
with [MHz]. Observe that the Carr 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 100: 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] to select RF level as the current function. RF Levl: is now highlighted
on the screen.
(4) Using the numerical key pad, enter 10 dBm by entering 10 on the key pad and terminate
with [dB]. Observe that the RF Levl display changes to +10.0 dBm.
(5) Press [CARR ON/OFF]. Repeated pressing toggles between the on and off states as shown
by ON and OFF at the centre of the screen. Select ON. A 100 MHz, 10 dBm carrier is now
being generated from the RF OUTPUT socket.
Modulation
(6) Press [MOD] which highlights FM Devn. Repeated pressing of the key alternates between
FM1 and FM2. Select FM1 Devn. Enter 100 on the key pad and terminate with [kHz].
100 kHz is displayed.
(7) Press [MOD ON/OFF]. Repeated pressing toggles between the off state (when Mod
Disable is displayed) and the on state. Select ON.
(8) Press [MOD SOURCE] which highlights ModF with a waveform displayed. Repeated
pressing of the key cycles through sine, triangle and square waveforms. Select sine wave.
Enter 500 on the key pad and terminate with Hz. 500.00 Hz is displayed.
(9) Press [SOURCE ON/OFF]. Repeated pressing toggles between the on and off states.
Select ON. A 100 MHz, 10 dBm carrier is now being generated at a 100 kHz deviation,
modulated at 500 Hz, from the RF OUTPUT socket.
Using [NEXT] and [PREV] to select a function
The operating example above was carried out by pressing the four function keys in turn in order to
enter the parameter values. Another method is to repeatedly press either the [NEXT] or [PREV]
key. This enables you to access each of the four functions CARR FREQ, RF LEVEL, MOD,
MOD SOURCE in either forward or reverse rotation.
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