ANALOG MODULATION MODE
3-89
Storing data
To store data, press the soft key for the type of store required, e.g.
[Partial Store]
and define a
store location via the numerical key pad, then press [enter].
The settings for the sequential calling tones are stored via the calling tones menu in
UTILITIES, see Fig. 3-69. These stores can be erased from the Store Erase Menu.
Store erase
Unlock to Level 1. Pressing
[Store Erase]
causes the
Store Erase Menu
to appear on the screen.
The opportunity to erase all the stores of a given type is available by pressing the relevant key and
then pressing
[Erase]
.
Frequency hopping
Carrier frequency hopping is a GPIB operation where the instrument can be instructed to hop
between any of the frequencies contained in the carrier frequency stores and a sequence of up to
1024 hops may be entered. The time interval between hops can also be entered.
Before executing a carrier hopping sequence, the frequencies must be loaded into the carrier
frequency stores (0 - 99). This can be achieved via the GPIB using the following commands:
CFRQ
<
frequency value >
STO:CFRQ
< store number >
To enter the frequency hopping mode, enter the following GPIB commands:
IMODE SWEEPER
SWEEP:TYPE HOP
This will cause the screen as shown in Fig. 3-85 to appear on the signal generator:
REMOTE
Go To
Local
Sweep Status: WAITING FOR TRIGGER
Sweep Mode: INTERNAL SINGLE
Sweep Type: CARRIER HOPPING
Step Time:
ms
50
C0067
GPIB OPERATION ONLY !!!
Fig. 3-85 Frequency hopping menu
To load in a sequence, the following command is used:
HOPSEQ
<n0>,<n1>,<n2>,<n3>,<n4>.....
where <n0> - <n> are numeric values in the range 0-99 corresponding to the carrier frequency
store at which the necessary frequency is stored. The hopping sequence length is determined by
the amount of numbers entered.