System information

The AXT600 Spectrum Manager is a unique, 8-band, parallel-processed receiver with three selectable detector bandwidths

and an FM-demodulated audio headphone output for quick monitoring.

Functions

The Spectrum Manager is capable of executing one of four distinct, but independent functions at any time:

It is very important to remember that the functions of the Spectrum Manager operate independently of each other and only

one function can be operated at a time. For example, if you are using the Spectrum Manager as a continuous scanning

receiver with Wireless Workbench, the backup frequency monitoring process is not operating. Similarly, if you’re using the

audio listen monitoring, the backup frequency monitoring process is not operating.

Frequency Scanning and Display

The frequency scanning and display function gathers frequency data as input to the frequency calculator inside the

Spectrum Manager. After the scan is completed, you can view the RF frequency data from the front panel LCD interface

and use the control wheel to zoom into areas of interest. You can also save the scan data into internal memory for later

recall from Wireless Workbench. This function can also be accessed from WWB6, offering additional options for setting

scanning range, step size, and bandwidth resolution.

Frequency Calculation and Deployment

The Spectrum Manager uses the scanned frequency data to calculate a compatible frequency list (CFL). Using its on-

board calculation engine, the Spectrum Manager runs several thousand iterations to find the maximum and optimal set of

frequencies, including backup frequencies. The calculator will run until the number of new frequencies found per second

goes below a preset threshold. User-defined exclusions prevent restricted frequencies from being included in the CFL.

Once the CFL calculation is complete, the frequencies are deployed to devices on the network.

Backup Frequency Monitoring

After frequency deployment, the Spectrum Manager continuously monitors all backup frequencies. The energy level of

each frequency within the CFL is checked against the threshold. Frequencies with energy levels exceeding the threshold

are given a status of Degraded and will not be deployed to receivers. Once a frequency is Degraded, it must measure

below the threshold for more than 30 seconds before it can be upgraded to Ready status and re-included into the list of

assignable frequencies within the CFL.

Audio Listen Monitoring

Audio listen monitoring allows you to tune the Spectrum Manager to any frequency and monitor the FM-demodulated

audio at the monitor output. While Listen mode is active, you will see a real-time RF signal strength display on the left side

of the LCD in addition to the selected frequency and antenna.

Frequency

scanning and

display

Frequency

calculation and

deployment

Backup

frequency

monitoring

Audio

listen

monitoring

AXT600 Spectrum Manager Design

Note: The audio listen circuit is designed to emulate the Axient receiver Audio Reference Companding expander.

Part 3: System Operation