User's Manual

NewsCaster VT2 Operation

M17-0002-01A Rev 0.0 64 User Manual

5.4 NEXTEL BAS RELOCATION SETTINGS

For our US clients, the ChannelMaster is designed so that, when properly configured per the

following guidelines, you will only need to change one setting, on one screen when it’s time to

switch over to the “post-Nextel” 2GHz band plan.

To preset the unit to allow a “one setting” switchover, there are two groups of settings that must be

made in advance: “AUDIO SUB-CARRIER FREQUENCY” and “CHANNEL BANDWIDTH &

BAND PLAN”. These are described below.

5.4.1 Audio Sub-Carrier Frequency

In this section you set your “pre-Nextel” and “post-Nextel” Audio Sub-Carrier (ASC) frequencies,

so that when you make the switchover they will be ready to go.

Start the ASC set-up procedure by making the following menu selections:

SETTINGS>MODULATOR/ENCODER>ANALOG>AUDIO

This brings up a screen similar to the one at right, with the

settings and selections as described below:

NOTE: Press “Up” & “Down” to scroll through the ASC’s, and press “Left” & “Right” to scroll

through the available settings. The settings for all ASC’s are modified in the same fashion. ASC#1

is used as the example.

2(17)/7/13 This setting controls the frequency for the selected Sub-Carrier when

operating in the “pre-Nextel” 2 GHz band (USA), and also for all the other

frequency bands (i.e. 7 GHz or 13 GHz). The possible range for this setting is

4.83 MHz to 8.5 MHz.

2(12) 1-7 This setting controls the frequency for the selected Sub-Carrier when

operating in the “post-Nextel” 2 GHz band (USA

) on channels 1 through 7.

The possible range for this setting is 4.83 MHz to 5.8 MHz

2(12) 8-10 This setting controls the frequency for the selected Sub-Carrier when

operating in the “post-Nextel” 2 GHz band (USA

) on channels 8 through 10.

The possible range for this setting is 4.83 MHz to 8.5 MHz

Nucomm’s default Audio Sub-carrier Frequencies

Band-plan ASC1 ASC2 ASC3* ASC4*

2(17)/7/13 4.83 MHz 6.20 MHz 6.80 MHz 7.50 MHz

2(12) 1-7 4.83 MHz 5.80 MHz 6.80 MHz 7.50 MHz

2(12) 8-10 4.83 MHz 6.20 MHz 6.80 MHz 7.50 MHz

*NOTE: Due to bandwidth limitations, only two ASC’s can be active on the “post-Nextel”

2 GHz band-plan (US), regardless of how the unit is hardware configured.



SC1 Insertion:

(-20 to -40dBc)

2(17)/7/13: 4.83 MHz

2(12) 1-7: 4.83 MHz

2(12) 8

4.83 MHz