Monitoring Van, Base Station - continued

The Radio's used in the Base station van are the UHF 408.0125 for the voice flags.  This radio is wired into the computer from the speaker out jack of the radio.  The software on the PC is a voice activated program that samples audio at 8KHZ resolution, which is plenty for recording audio from this radio. 

As the audio is being recorded it contains specific data on what ground point is being sampled to be compared to the marked data on the GPS.  It is also logged with the voice activated software with a time and date stamp to every audio recording.

The other radio used is a VHF radio that we just used for communication while we were conducting testing.

The van is also equipped with a cellular telephone base unit capable of transmitting 3watts total output power.  The phone is wired to an antenna wired with double shielded LMR 200 times microwave cable to insure clear communications.

This phone is a Motorola telephone with the Motorola telephone/fax interface them emulates a telephone line which is wired into a 28.8 Logicode Data/Fax modem in the PC with cellular protocol.

Testing of this setup for data transfer has enabled us to link up TC/PIP at data rates of 24,000 KBaud compressed over the cellular network.

A location for a secondary computer was also placed in the van for a complete operational backup system.

This computer used was a IBM ThinkPad capable of operating under its own battery supply for a total of two hours in case of failure of main PC.

This computer also is linked via Parallel cable so if it is used in failure of main PC, once the other system is on-line again data can be transferred back to the main storage.

This computer is also removable for any service or setup that needs to be done away from the Base van.