Aim-TTI TG1000, Instruction Manual

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24
Tone Mode
General
In Tone mode the output is stepped through a user
−
defined list of up to 16 frequencies under the
control of the selected trigger source. The frequency list is defined using the
TONE SETUP
screen and the trigger source is selected on the TRIG/GATE SETUP screen. Tone mode is
turned on using the
tone
soft-key on the
MODE
screen.
Tone Frequency
Press the
tone setup
... soft
−
key on the
MODE
screen, called by pressing the
MODE
soft-key
on the main menu to get the
TONE SETUP
screen:
TONE SETUP
source as gate setup
◊
1·00000 kHz #1
♦
2·00000 kHz del
◊
Each frequency in the list can be changed by pressing the appropriate soft
−
key and entering the
new value from the keyboard. The selected frequency can be deleted from the list by pressing
the
del
(delete) soft
−
key. Additional frequencies can be added to the end of the list by selecting
end of list
with the appropriate soft
−
key and entering the new frequency from the keyboard.
The whole list can be scrolled back and forward through the display using the rotary control.
Tone Gate Source
The tone frequency steps (changes) when the specified trigger signal goes high and continues
until the level changes again, at which point the output immediately returns to the DC Offset level
specified; the output is then gated off until the next occurrence of the trigger signal at which time
the next frequency in the list is gated on. Note that, just as with Gated mode, the tone frequency
is not synchronised with the tone stepping gate source and the start and stop phase of each tone
is therefore entirely unpredictable.
The trigger signal used for stepping the tone is exactly the same source as that used for Gated
mode and is set up on the
TRIG/GATE SETUP
screen, called by pressing the
gated
setup ... soft-key on the MODE screen. The tone switching trigger source can be manual
(front panel MAN TRIG key, or remote command), an external signal applied to the
TRIG/GATE IN socket, or
internal
from the internal trigger generator. Refer to the Gate
Source paragraph in the Gated Mode section for selection of the trigger source.
When
external
is the selected tone stepping trigger source the maximum switching
frequency that is recommended (applied to the TRIG/GATE IN socket) is 1kHz.