ANALOG MODULATION MODE
3-70
Hardware information
To obtain a description of the instrument hardware, press
[Hardware
Status]
and the following
information is displayed:
Instrument type (e.g.
2051T
)
Serial no. (e.g.
1543256/045
)
Options fitted (e.g.
SECOND LF OSC.
)
Attenuator type and serial number.
For attenuator calibration information, refer to the Service Manual.
Software information
To obtain a description of the instrument software, press
[Software
Status]
and the following
information is displayed:
Software Version Number e.g.
7.001
Part number e.g.
44533-1-419
GPIB address e.g.
01
External trigger
The external trigger facility allows the rear panel TRIGGER input to be set up so as to initiate a
defined change in the generator setting. To define the function press
[External Trigger]
. The
display changes to show the
External Trigger Selection Menu
which has the following options:
[Sweep Start]
Starts the external sweep.
[Sweep Step]
Goes to next step of external sweep.
[Send Seq Tones]
Equivalent
to
[Send Tones]
on main menu.
[Recall Up]
Recall next store.
[Recall Down]
Recall previous store.
[No Ext. Trigger]
Trigger ignored (default).
The external TRIGGER input requires a TTL type input and includes an internal pull-up resistor to
+5 V. A switch closure to ground or an applied voltage transition from +5 V to 0 V on the rear
panel socket initiates the defined trigger action.
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 'Modulation mode
selection' above.
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 4.
Sequential calling tones
Sequential calling tones are set up from a utility menu, Fig. 3-69, 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'.