NGT—Channel additions
130 NGT Transceiver System Technical Service Manual
General
If you are operating your transceiver in a country that has stringent licensing regulations,
you may not be permitted to program channel transmit frequencies. Instead, the preferred
option may be option TxD (programming of transmit frequencies is disabled).
If you are permitted to program channel transmit frequencies, you can do this via the
RS232 socket of the handset using a PC, or via the keypad on the handset.
Details on how to program channels using a PC can be found in the NGT System
Programmer Help.
Options
Options TxD, TxE and TxP are preset in the factory. Options TxE and TxD are enabled
and disabled by fitting a TPE link on:
• Lk 6 on the Microprocessor PCB inside the junction box (see Figure 22 on
page 131), or
• Link B on the Application Processor Handset I/F 3 V PCB inside the 2011 (see
Figure 23 on page 131), or
• Link B on the Application Processor Handset & Data I/F PCB inside the 2012 (see
Figure 24 on page 132)
The transceivers are delivered from the factory without the TPE link fitted. Fitting the
TPE link in TxE mode disables programming of transmit frequencies. Fitting the TPE
link in TxD mode enables programming of transmit frequencies (see Table 33).
Table 33: Transmit disable, transmit enable and transmit prohibited options
Status of TPE link TxD TxE TxP
TPE link fitted Tx & Rx program
enabled
Normal operation
disabled
Tx & Rx program
disabled
Normal operation
enabled
Tx & Rx program
disabled
Normal operation
enabled
TPE link not fitted Tx & Rx program
disabled
Normal operation
enabled
Tx & Rx program
enabled
Normal operation
enabled
Tx & Rx program
disabled
Normal operation
enabled
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