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LBI-39014B
The Public Address microphone audio normally feeds an external speaker. An ON/OFF switch, which is mounted on or near the radio, allows selecting either the internal or external speaker for the receiver audio. The ON/OFF switch turns the receiver audio on or off to the external speaker.
This switch still functions for the receiver audio with the PA option disabled.
GE tone system or Quick-Call (In Motorola tone systems) allows communication between all radios in a system.
ERICSSON GE TYPE 99 FORMAT
Tone frequencies in the Ericsson GE tone system fall within the range of 517.5 to 997.5 Hz.
TYPE 99 OPTION OPERATION
If the Type 99 option is present, selective calling is possible. Press the programmed flex key or scroll through the menu to select the T99 decoder option (Scan must be off).
The LED display will show "T99 ON" or "T99 OFF" for 2 seconds (PC programmable). During that time subsequent pressing of the flex key or Group/SEL buttons will toggle the T99 state between OFF and ON.
When a T99 call is received, the entire display will alternate between "T99" and the normal channel display and an alert tone will sound. If a call has been received and the display is flashing, CLR must be pressed before the T99 option can be turned off.
DETAILED TYPE 99 OPERATION
AND PROGRAMMING
The optional Type 99 Control Panel provides individual, group and super group call decode. The Motorola Formatted two-tone sequential signaling schemes can also be decode.
In Type 99 Tone systems, calls will not be heard from the receiver until the proper two tones are detected. When the second tone is decoded and recognized as correct, an alert tone sounds during the remaining portion of the second tone.
The receiver audio path opens and remains open to receive messages until the decoder is reset. The display will also flash to show a call has been received.
The MDX radio can be PC programmed with up to three separate tables of tones. Either the Ericsson GE Type 99 format or the Motorola format can be assigned to each tone table. The tone decoder can be enabled individually for each channel. Once enabled, one of the three tone tables can be selected for each channel. After choosing a tone table, the call formats must be specified: Individual, Group and Super
Group for the Ericsson GE format or Individual, Group and
Quick-Call for the Motorola format.
The Group Call format allows communications with all radios within a subgroup. The Super Group call (in Ericsson
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 tables.
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---->
±
20%
<----200 MS---->
±
25%
<----1.0 SEC---->
+300% -0%
TONE A GAP TONE B
GROUP CALL FORMAT
<----1.0 SEC---->
±
20%
<----200 MS---->
±
25%
<----1.0 SEC---->
+300% -0%
TONE A GAP TONE D
SUPER GROUP CALL FORMAT
<----1.0 SEC---->
±
20%
<----200 MS---->
±
25%
<----1.0 SEC---->
+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
5
6
7
8
9
0
1
2
3
4 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 column labeled "Tone Designator" to find B2. Read horizontally 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 systems 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
For 1st Tone
A
B
B
A
C
C
C
A
B
Not Used
1’s DIGIT
For 2nd Tone
A
A
B
B
C
A
B
C
C
Table 4 - Tone Generator Frequencies
TONE
GROUP
A
B
C
Diagonal Tone
TONE
DESIGNATOR
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
B4
B5
B6
B7
B8
B9
B0
B1
B2
B3
A4
A5
A6
A7
A0
A1
A2
A3
A8
A9
TONE
FREQUENCIES
682.5 Hz
592.5 Hz
757.5 Hz
802.5 Hz
847.5 Hz
892.5 Hz
937.5 Hz
547.5 Hz
727.5 Hz
637.5 Hz
652.5 Hz
607.5 Hz
787.5 Hz
823.5 Hz
877.5 Hz
922.5 Hz
967.5 Hz
517.5 Hz
562.5 Hz
697.5 Hz
667.5 Hz
712.5 Hz
772.5 Hz
817.5 Hz
862.5 Hz
907.5 Hz
952.5 Hz
532.5 Hz
577.5 Hz
622.5 Hz
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 below 1000 Hz. These errors will not cause any decoding problems.
8
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 B TONE A
GROUP CALL FORMAT
GAP
<-1.0 SEC MIN-> <----NONE----> <--3 SEC MIN-->
TONE C
QUICK CALL FORMAT
GAP TONE B
<-------------------------------8 SEC------------------------------->
TONEB
INDIVIDUAL CALL
Tables 4 & 5 may also be used to determine the tone frequencies. The first digit of the code determines the tone groups used in the code (See Table 4). Then Table 5 is used to determine 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
Table 5 - Motorola Type Coder Numbers
First Digit of
Code
7
8
5
6
3
4
1
2
9
0
A
Group From Which
Tone A Is Selected
4
5
5
2
1
4
1
2
2
4
3
Group From Which
Tone B Is Selected
5
4
5
1
2
4
1
2
4
2
3
GROUP CALL (Quick-Call Format)
In Group Call application, the Tone Group is determined by
Table 7, while the frequency is determined by Table 6. Refer to the following examples.
NOTE
Group Call code numbers range from 00 to 99. However, there are several group calls with the same Tone
B frequency. This limits the total number of groups called to 40.
EXAMPLE 1 - Group Call Code 07 (also code 27 and 37):
The digit "0" in Table 7 shows the Tone B is in Tone Group
2 (TG2) along with 20 to 29 and 30 to 39. Tone number 7 in
Tone Group 2 is 832.5 Hz (See Table 6).
EXAMPLE 2 - Group Call Code 98 (also code 48 and 88):
The digit "9" in Table 7 shows that Tone B is in Tone Group
(TG4) along with 40 to 49 and 80 to 89. Tone number 8 in
Tone Group 4 is 496.8 Hz.
Tone
No.
7
8
5
6
9
0
3
4
1
2
Tone
Group 1
349.0 Hz
368.5 Hz
389.0 Hz
410.8 Hz
433.7 Hz
457.9 Hz
483.5 Hz
510.5 Hz
539.0 Hz
330.5 Hz
LBI-39014B
Table 6 - Motorola Tone Frequencies and Groups
Tone
Group 2
600.9 Hz
634.5 Hz
669.9 Hz
707.3 Hz
746.8 Hz
788.5 Hz
832.5 Hz
879.0 Hz
928.1 Hz
569.1 Hz
Tone
Group 3
288.5 Hz
296.5 Hz
305.7 Hz
313.0 Hz
953.7 Hz
979.9 Hz
1006.9 Hz
1034.7 Hz
1063.2 Hz
1092.4 Hz
Tone
Group 4
339.6 Hz
358.6 Hz
378.6 Hz
399.8 Hz
422.1 Hz
445.7 Hz
470.5 Hz
496.8 Hz
524.6 Hz
321.7 Hz
Tone
Group 5
584.8 Hz
617.4 Hz
651.9 Hz
688.3 Hz
726.8 Hz
767.4 Hz
810.2 Hz
855.5 Hz
903.2 Hz
553.9 Hz
Table 7 - Motorola Group Call Tone Groups (TG)
Tone Number Tone Group
00-09
10-19
20-29
30-39
40-49
50-59
60-69
70-79
80-89
90-99
TG2
TG1
TG2
TG2
TG4
TG5
TG1
TG5
TG4
TG4
Tone
Group 6
1153.4 Hz
1185.2 Hz
1217.8 Hz
1251.4 Hz
1285.8 Hz
1321.2 Hz
1357.6 Hz
1395.0 Hz
1433.4 Hz
1122.5 Hz
9
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