Glenayre Electronics Inc. GL-T8600-CN Manual Do Utilizador
Glenayre Document Number: 9110.00172
DSP Exciter
Issue 1, Rev. I: 01/15/97
MAINTENANCE
Print Date: 02/19/97
Copyright © 1997 Glenayre
Page: 7-3
sec_
7
deviation and offset. By changing channels, the deviation requirements of the paging
formats were met. However, a channel change requires that the transmitter be unkeyed to
allow time for PLL lock-up, which is a loss of air time.
formats were met. However, a channel change requires that the transmitter be unkeyed to
allow time for PLL lock-up, which is a loss of air time.
The on-the-fly feature allows the following:
•
Each channel can be programmed for four different digital modes (A, B, C, D)
•
Each mode allows different digital deviation and offsets to be programmed
During normal paging operation, the C-2000 controller sends information to the transmitter
telling it what channel to operate on and which one of the four digital modes to use. The
four different digital modes of operation are controlled by the data 2 and data 3 lines into
the C-2000 interface board on the DSP exciter. If the paging data requires a different devi-
ation, the C-2000 transmitter controller can change the mode without having to change the
channel. This allows the DSP exciter to accommodate different paging format requirements
without unkeying the transmitter to change channels.
telling it what channel to operate on and which one of the four digital modes to use. The
four different digital modes of operation are controlled by the data 2 and data 3 lines into
the C-2000 interface board on the DSP exciter. If the paging data requires a different devi-
ation, the C-2000 transmitter controller can change the mode without having to change the
channel. This allows the DSP exciter to accommodate different paging format requirements
without unkeying the transmitter to change channels.
7.5.1
Programming Example
To set up the exciter for the proper digital deviation and offset programming, make up a
table similar to the one shown below. Next, access Digital Mode Setup menu and select
View Channel Frequencies submenu.
table similar to the one shown below. Next, access Digital Mode Setup menu and select
View Channel Frequencies submenu.
Note
Initial release has setup similar to above table. Subsequent releases may
have more programming variations
have more programming variations
Table 7-1 Deviation and Offset Programming
Channel
1&9
2&10
3&11
4&12
5&13
6&14
7&15
8&16
Mode/Dev.A
4500
4500
4500
4500
4500
4500
4500
4500
Mode/Offset A
0
+400
-400
+300
0
-300
0
0
Mode/Dev.B
4800
4800
4800
4800
4800
4800
4800
4800
Mode/Offset B
0
+200
-200
+400
0
+400
-400
0
Mode/Dev.C
2400
4200
4200
2400
2400
4200
2400
4200
Mode/Offset C
0
0
0
0
0
0
0
0
Mode/Dev.D
4200
2400
4200
2400
2400
2400
4200
2400
Mode/Offset D
0
0
+400
-400
0
0
0
0