IFR FM/AM-1200A Operation Manual page 125

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!
5-10-8
TWO TONE SIGNALING FORMAT OPERATION
This format allows the setting of two tone frequencies, duration times
for these frequencies and a GAP time between the generation of these
two tones. The programming screen used to set these parameters is con-
figured as:
The
The segments of
this programming
screen and their
ranges are:
Two-Tone Format
Tone
# (1
or 2)
Tone Frequency
(300-3400 Hz)
Tone Duration
(20 mS- 9999 mS)
-~-'..,Iandi~ keys are used to moved the cursor between the segments of
~~~ !---·
r ,
~
the screen and the number keys or the
arrow keys are used to
enter the required digits.
After the Tone #1 frequency and duration is entered, a screen will
appear on the VFD which allows the entry of the GAP time, or interval
between Tone #1 and Tone #2.
As an example, use the following steps to program a Two Tone format
with an 800 Hz tone of 1 second duration for Tone #1, a 750 mS GAP time
and a 600 Hz tone of 2 seconds duration for Tone #2:
STEP
1.
5-14
05
PROCEDURE
The VFD indicates:
r.;=lllslr==;=/ I
E::::;=-,1
:;==;:I I =;=ls:::;=;l lr==r=sl
'::::;==,
le:y::=:;:lslr=;=,l
:::;=;1
l==nllll
(Or other format, depending on last tone format programmed)