Setting the modulation mode
Modulation mode selection allows
the generator to be configured to
provide
carriers
modulated by one, two or four
(2
internal
and 2 external) modulation sources.
Press [Mod'n Mode] to display
the Modulation Mode Selection Menu, choose the
type of
modulation required
by pressing [Single], [Dual],
[Comp]
or [Dual Comp[
see Page
3-1-19,
'Modulation mode selection'.
Setting the
GPIB address
Press [GPIB
Address] to display the GPIB Address Change
Menu. To change the
address, enter the address, in the range
0-30,
via
the numerical key pad and press [enter].
The
data is then saved automatically
in the non-volatile memory. For information
on operating the
instrument via
the GPIB, refer to Chapter
3-2.
Sequential
calling tones
Sequential calling tones are
set up from a utility menu, Fig.
3-1-26,
and are
activated by
pressing
[
Send Tones] which appears on the main menu after
the tones have been set up. [Send
Tones] also appears on the calling tones
menu. Pressing the [Calling Tones] soft key
at Utilities
Selection Menu 1
calls up the Sequential Calling Tones
Utility
menu,
see 'SIGNALLING'.
Carrier phase
adjustment
Pressing
[
Carrier Phase
]
displays
the Carrier Phase Control Menu.
To
advance
or retard
the carrier phase
(with
respect to its current
phase) in steps of ti/ 128 radians, approximately
1.4°,
rotate the
control knob clockwise to advance
the phase and counter-clockwise
to retard the phase.
Selection
of frequency standard
Pressing [Int/Ext Standard] changes
the menu to display the Frequency
Standard
Selection Menu which
has the
following
options:
I
MHz Int. Std.
5
MHz
Int. Std.
10
MHz
Int.
Std.
1
MHz
Ext. Std.
5 MHz Ext. Std.
] 0
MHz
Ext. Std.
If the internal standard is selected, it is available
as an output at the selected frequency
on
the rear panel. Selecting
an external option enables the instrument
to accept a standard from an
external
source at that frequency. These settings are saved
in the non-volatile memory.
3-1-36
46882-074C
To Next Page