User's Manual

Page 38

M Series Data Radio – User Manual

Part G – Maintenance

Routine Maintenance

Considerations

The M Series hardware itself does not require routine maintenance.

However all radio products contain crystal frequency references, and

the stability of these crystals change with time. The effect of this is that

the product will slowly drift off frequency, and eventually it will require

re-calibration. M Series radios are designed with high quality, low drift

specification references, to ensure a long maintenance free lifespan.

The length of this lifespan will depend on the severity of temperature

extremes in the operating environment, but is normally 3–5 years.

Extended frequency drift can be detected using TVIEW+ Diagnostics

“Freq error” parameter.

Re-calibration is achieved by replacing the radio in the field with a

spare, and returning the radio to a service centre for re-calibration and

specification testing at moderate cost.

Routine maintenance should be performed on external equipment

subject to greater environmental stresses including antennas, RF

feeder cables, backup batteries and cooling fans (if required). This

maintenance should include testing of site commissioning figures such

as received signal strength, VSWR, P/S voltage etc.

Part G – Maintenance