Picture 4
– Example of optimum tuning at – 115dBm/120dBm
Notes on Tuning
Only use a ceramic tuning tool. A standard screw driver will give poor results due to the magnetism affecting the
capacitance of the trimmer capacitor.
Only use enough pressure on the trimmer caps to hold the ceramic tuning tool in place. Excess pressure will cause
damage to the trimmer and give poor tuning results.
Only turn the trimmer capacitor in small and slow movements, harsh adjustments will cause damage to the trimmer
and give poor tuning results.
When testing the paging device after tuning, it should receive at -120dBm (pocsag - different levels will be indicated
on Flex (talk to WiPath)), however, if the device is set to a frequency that is used locally (i.e. a local
telecommunications provider) you may need to test the device in a shielded environment, if this is not possible a
reasonable pass level is -118dBm although strong local signals may reduce this and it is recommended that it be
tuned at a close but different frequency.