User Manual

SGD-SB2025NT-TUM, Part 1
Jan 12 Page 39 ALIGNMENT & TESTING
6.1.2 Sending Configuration Information
Firstly, the configuration file for the radio needs to be setup. Using MxTools the configuration
information needs to be entered on the Configuration Screen. This information needs to be saved
to a configuration file. If an existing radio already contains the desired configuration, this
configuration can be downloaded and saved. This configuration information then needs to be ‘Sent
to the SB2025’. A warning message will appear that indicates that the SB2025 Base Station has
not yet been calibrated, this may be ignored.
Once the configuration information has been sent, all of the programmable parameters within the
SB2025 Base Station are initialised.
6.1.3 Sending Channel Information
The channel information setup is similar to that of the configuration. The channel frequencies, sub-
tones and other parameters are setup in the Channel Screen in MxTools. At this stage, it is not
necessary to set the values of the digital potentiometers. This will be done in the following
procedures. After entering in the channel details, the information needs to be saved to a file. If
another radio already contains the desired frequencies, these can be downloaded from that radio
and saved to a file. The digital potentiometer values from one radio to the next will differ, therefore,
it is advisable to save the information in a new channel file and not save over the top of any backup
copies of existing radios. The saved channel information is then sent to the SB2025NT.
After sending the configuration and channel information, the SB2025NT is fully programmed and
will now operate. The radio will not function without sending both the configuration and channel
information and, therefore, the following procedures will be unable to be completed.
Note.
The buttons for sending and loading the channel information may be disabled if
MxTools did not successfully ‘Connect to SB2025’. If this is the case, simply choose
to ‘Connect to the Radio’ after the configuration information is sent.
6.1.4 Setting Alignment Channel
When setting up the radio, it is recommended that all measurements and adjustments are done on
a channel that is in the centre of the frequency spread of the channels. This minimises any errors
due to frequency changing. Alternatively, if the frequency spread of the channels is too large, you
may wish to calibrate and align every channel. (In most cases this will not be necessary.) Both
individual and group alignment will be covered.
The channel may be selected either via the Channel Screen in MxTools using the software channel
select or in hardware via the internal channel DIP switch. (Refer to Section 3.2.2.3 for additional
help.) This channel will then be used when performing the following procedures.
6.1.5 Power Calibration
This procedure must NOT be used to set the Tx Output Power. For the Tx Power
Adjustment procedure, refer to Section 6.1.8.
Power calibration affects the forward and reflected power meters on the Diagnostics Screen, as
well as the low forward power trip point for the SB2025NT. This procedure requires a RF Power
Meter and the relevant leads to connect the Tx output to the meter. Power calibration is done
using MxTools via the Calibration Screen.
To complete the power calibration, carry out the following:
1. On the MxTools main screen, on the tool bar, select the ‘Calibration’ icon. The calibration
screen will be displayed.