XPT/R2G
Pag.
15
In the similar way the transmitter XPT-2G is delivered working on the assigned frequency band,
which can be 30 – 50 Mhz wide .
The value of the required frequency range can be found on the label on the rear panel.
XPT-2G transmitter include in their output a band-passfilter , so as to work properly without spur and
harmonics in antenna. Intermodulation with other transmitters is reduced ; for incresed this last parameter
can be putted an insulator
(option D
) before the output filter .
Within the assigned band, such filter needs to be tuned through a network- or spectrum-analyzer (the
latter must also include a tracking-generator). Please be careful when turning the screw of the filter.
Here below are two curves of the transmitter’s filter, based on the first and last available bands (1600 and
2400 Mhz).
Insertion loss is below 1.0 dB and input return loss is better than -15 dB.
