GAI-Tronics ICP9000 Navigator Series Console Installation and Service Manual - Manual (Page 75)

ICP9000 Navigator Installation and Service Manual Paging
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Plectron Paging
The Plectron paging feature requires a 4-digit prefix (capcode). Like 2-Tone paging, the capcode and
code plan determine at what frequency the paging tones are transmitted.
Plectron paging uses the Plectron Code Plan Chart (Table 22) and Plectron Tone Group/Frequency Chart
(Table 23). Refer to the example below and the tables to determine the capcodes you need.
Plectron Paging Example
Suppose the number of Plectron keypad digits accepted from the user on the selected channel is 0 and the
capcode has been programmed to 3456. The A tone length is 1 second and the B tone length is 2 seconds.
If the console operator were to press the TRANSMIT button, the console would send an A tone of 330.5
Hz for 1 second, and then a B tone of 564.7 Hz for 2 seconds.
The frequencies for the A and B tones are determined from the charts, according to the following
procedure:
1. Locate the first two digits of the prefix (3 and 4 in this example) on Table 22.
2. In the column beneath this two digit number, there are two P numbers (P5 and P6 in this example)
that correspond to tone groups on Table 22. Using the P number for the third digit of the prefix,
determine the correct tone group from the Table 23.
3. Find the frequency of A tone (330.5 Hz) by locating the intersection of the tone group row with the
column headed by the third prefix digit (5 in this example).
4. Find the frequency of the B tone is in the same manner by using the tone group for the fourth prefix
digit as listed in Table 22 below.