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TN-1114-AN

Page 7 of 10

© Tait Electronics Limited 21 December 2005

6

Configuring the Base Station

Extended bypass is configured in the channel profile assigned to the 
operating channel.  If a different operating channel is selected, the signal 
path configured for that channel will take effect.  

Important

Selecting this function bypasses the limiter.  This may allow 
overdeviation and cause the equipment to become non-
compliant.  It should be selected only when the TB8100 is 
connected to approved level-controlled devices (modems, 
trunking controllers, etc.).

Important

With extended bypass you cannot use the balanced line or 
internal talk-through repeater connections from receiver to 
transmitter.

To configure the signal path for extended bypass.

1.

Run the Service Kit and open the Add or Edit Channel Profile dia-
logue box for the appropriate profile.

2.

Select the Signal Path tab.

3.

Select the 

Bypass

 check boxes for Path B (both transmit and receive). 

Extended bypass

 check boxes appear alongside the 

Bypass

 check 

boxes.

Содержание TB8100

Страница 1: ...TB8100 base station Using a TB8100 with an External Modem Application Note TN 1114 AN 21 December 2005...

Страница 2: ...5 Connecting the TB8100 to an External Modem 5 6 Configuring the Base Station 7 7 Performance Specifications 8 8 Frequency Response Graphs 9 Associated Documentation TB8100 Installation and Operation...

Страница 3: ...performance has been tested using only the unbalanced line interface on an isolated system interface board TBA10B0 Note The TB8100 does not check the extended bypass functionality against the hardware...

Страница 4: ...ve audio bypass path received audio from the FM demodulator is decimated from 50kHz to 25kHz It is then directly converted to the analogue unbalanced line output with no further filtering Extended Byp...

Страница 5: ...system interface board the transmit path is DC coupled with a bias of 2 5V and the receive path is AC coupled We recommend that you enable the high pass filter in the Signal Path tab of the channel pr...

Страница 6: ...em to cope with the timing sequence of audio presented from the unbalanced line Refer to the TB8100 Specifications Manual for gating response times Tx Key If you do not require continuous transmission...

Страница 7: ...come non compliant It should be selected only when the TB8100 is connected to approved level controlled devices modems trunking controllers etc Important With extended bypass you cannot use the balanc...

Страница 8: ...system will depend on the specific external modem used and the interface levels into the TB8100 narrow bandwidth C4FM 9600bps external modem based on a CML FX919 chipset narrow bandwidth GMSK BT 0 5 4...

Страница 9: ...y Publication History Amendment Record Tait Contact Information Corporate Head Office New Zealand Tait Electronics Limited P O Box 1645 Christchurch New Zealand E mail Marketing taitnet taitworld com...

Страница 10: ...Page 10 of 10 TN 1114 AN Tait Electronics Limited 21 December 2005...

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