Specifications

fixed and not changed. The values read by TRX-Meter are affected by this correction.
From TRX-Meter press the CAL. button. Calibration must be done for each S unit (from S1
to S9 and +10 to +60). For each button, set your RF generator according to the
corresponding signal strength (value is indicated in µV), then press the button to poll your
transceiver; the program is calculating an adjustment factor which will be applied to the read
values.
You have to perform this calibration for each button; when you press OK, the program saves
all the calculated factors as default values.
Please note that for a given transceiver, adjustment factors may be different according to the
band, the pre-amplifier etc... It is useful to save these factors in separate calibration files (
.cal as extension).
Directive patterns
From TRX-Meter, press Plot. The directive pattern of an antenna is drawn from different
measurements of the signal strength done by step of 10 ° in azimuth. For each azimuth, set
your rotator very precisely and press the corresponding button to make a measurement.
If your rotator is under the control of TRX-Manager, this process may be fully automated:
press the Rotor button in order to control your rotator and press Auto to automate the
measurements. After each rotation of the rotor, the program waits the specified delay and
performs the measurement. The program does a full clockwise rotation (360 °) from any
azimuth, it is important to set the rotator fully counterclockwise before beginning the
process.
It should be noted that, because of inaccuracy of the remote control of the rotator, manual
control gives more precise plots.
The measurements may be saved as ASCII files (.plo as extension) ; the directive patterns
may be saved on BMP files.
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