Table of Contents
Advertisement
LBI-39015
ERICSSON GE TYPE 99 FORMAT
Tone frequencies in the Ericsson GE tone system fall
within the range of 517.5 to 997.5 Hz.
NOTE
A round-off error will occur when entering the tone
frequencies. This error is less than 0.2% and will not
cause any decoding problems. For example, it the
standard tone frequency of 517.5 Hz is entered, the
actual decoder frequency will be 517.4 Hz. This new
frequency will appear on the screen in the tone ta-
bles.
In the Ericsson GE tone format, the first tone may be
from tone group A (for individual or Group calls) or from
tone group C (for Super Group calls). The second tone may
be from tone group B (for individual calls) or from tone
group D (for Group and Super Group calls). The Ericsson
GE tone format is illustrated as follows:
ERICSSON GE TYPE 99 FORMAT
INDIVIDUAL CALL FORMAT
<----1.0 SEC---->
<----200 MS---->
<----1.0 SEC---->
±20%
±25%
+300% -0%
TONE A
GAP
TONE B
GROUP CALL FORMAT
<----1.0 SEC---->
<----200 MS---->
<----1.0 SEC---->
±20%
±25%
+300% -0%
TONE A
GAP
TONE D
SUPER GROUP CALL FORMAT
<----1.0 SEC---->
<----200 MS---->
<----1.0 SEC---->
±20%
±25%
+300% -0%
TONE C
GAP
TONE D
For example, assume the paging number to be 123. The
first digit of the paging number is a 1. Look in Table 3 and
read down the column labeled "100's Digits" to a 1. Read
horizontally across to the column labeled "10's Digit". The
tone group is B. The second digit of the paging number is a
2. The tone number is B2. Look in Table 3 and down the col-
umn labeled "Tone Designator" to find B2. Read horizon-
8
tally across to the column labeled "Tone Frequency". The
first tone frequency is 787.5 Hz.
To determine the second tone frequency look in Table 3
and as before, find the first digit of the paging number.
The second tone group is A. The third digit of the paging
number is a 3 and the Tone Designator is A3. In Table 3 read
down the column labeled "Tone designator" and find A3.
Read horizontally across to the column labeled "Tone Fre-
quency". The second tone frequency is 802.5 Hz.
For different paging numbers, locate the first digit in the
"100's Digit" column and determine the tone frequencies as
described in the example. For a complete description of tone
applications see DATAFILE BULLETIN DF-5000-3A.
Tone D is the diagonal tone used (Ericsson GE tone sys-
tems only) when the first and second tone frequencies are the
same. The standard frequency for Tone D is 742.5 Hz, but
may be programmed with any tone frequency.
Table 3 - Tone Groups
100's DIGIT
10's DIGIT
1's DIGIT
For 1st Tone
For 2nd Tone
0
A
A
1
B
A
2
B
B
3
A
B
4
C
C
5
C
A
6
C
B
7
A
C
8
B
C
9
Not Used
Table 4 - Tone Generator Frequencies
TONE
TONE
TONE
GROUP
DESIGNATOR
FREQUENCIES
A0
682.5 Hz
A1
592.5 Hz
A2
757.5 Hz
A3
802.5 Hz
A
A4
847.5 Hz
A5
892.5 Hz
A6
937.5 Hz
A7
547.5 Hz
A8
727.5 Hz
A9
637.5 Hz
B0
652.5 Hz
B1
607.5 Hz
B2
787.5 Hz
B3
823.5 Hz
B
B4
877.5 Hz
B5
922.5 Hz
B6
967.5 Hz
B7
517.5 Hz
B8
562.5 Hz
B9
697.5 Hz
C0
667.5 Hz
C1
712.5 Hz
C2
772.5 Hz
C3
817.5 Hz
C
C4
862.5 Hz
C5
907.5 Hz
C6
952.5 Hz
C7
532.5 Hz
C8
577.5 Hz
C9
622.5 Hz
Diagonal Tone
742.5 Hz
MOTOROLA FORMAT
Tone Frequencies in the Motorola tone system fall within
the range 288.5 to 1433.4 Hz.
NOTE
Tone frequencies above 1000 Hz must be rounded off
to the nearest Hz when programming the tone tables.
For example, the standard tone frequency of 1153.4 Hz
must be entered as 1153 Hz. Also, the program will
cause a round-off error of ±0.2 Hz for frequencies be-
low 1000 Hz. These errors will not cause any decoding
problems.
In the Motorola tone format, the first tone may be one to
three tones: A for individual call, B for Quick-Call and C for
Group Call. The second or final tone is B in all cases.
The Motorola tone format is illustrated as follows:
INDIVIDUAL CALL FORMAT
<-1.0 SEC MIN->
<----NONE---->
<--3 SEC MIN-->
TONE A
GAP
TONE B
GROUP CALL FORMAT
<-1.0 SEC MIN->
<----NONE---->
<--3 SEC MIN-->
TONE C
GAP
TONE B
QUICK CALL FORMAT
<-------------------------------8 SEC------------------------------->
TONE B
INDIVIDUAL CALL
Tables 4 & 5 may also be used to determine the tone fre-
quencies. The first digit of the code determines the tone groups
used in the code (See Table 4). Then Table 5 is used to deter-
mine the actual tone frequencies.
For a code of 124, the tone groups used are shown in Table
4. Tone A and Tone B are both located in Tone Group 1 and
Tone B is tone number 4. Refer to the following examples for
additional information.
EXAMPLE 1 - Code 098:
The "0" in Table 4 (First Digit of Code) shows that Tone A
is Tone Group 4 and Tone B is Tone Group 2 (See Table 5).
Tone number 9 in Tone Group 4 is 524.6 Hz
Tone number 8 in Tone Group 2 is 879.0 Hz
EXAMPLE 2 - Code 265:
The digit "2" in Table 5 shows that both Tone A and Tone B
are both in Tone Group 2.
Tone number 6 is 788.5 Hz
Tone number 5 is 746.8 Hz
Advertisement
Table of Contents
