A Beltpack needs to be configured only once (as long as the Settings in Site Surveyor are not changed). Once the Beltpack is configured, the 'Site Survey' mode can be re-entered by pressing the Down/Left key while powering up (press power key at the bottom for 3 seconds). The Beltpack will now continuously provide a readout of carrier and timeslot in use, the RFPI of the Active Antenna connected to and the Received Signal Strength Indication (RSSI).
The Beltpack tab of the Site Surveyor software is shown below. Configure the Beltpack as follows.

Site Surveyor Beltpack Tab
Connect a serial cable between the Beltpack and a COM port on the PC using the Serial Cable.
Ensure that the correct serial COM port is selected (displayed on the far right of the status bar). To select a different COM port, see Changing the COM Port.
Click on the Beltpack tab. If you have more than one Active Antenna setup on site and wish to force connection to a specific Active Antenna, then check the 'Specify Active Antenna To Connect To...' check box. A text box will appear so you can specify the RPN of the Active Antenna to connect to.
Power up the Beltpack in Site Survey Mode.
Click the 'Configure Beltpack' button. An information dialog box should appear after a second or so, saying that the 'Beltpack has been started successfully'. If an Active Antenna is running, then a connection should be shown on the display within a couple of seconds.
The serial cable can now be removed from the BP and it can be powered up and down as required without the need to re-connect to the laptop (unless the system ID or RF carrier settings are changed).