Monitor Calibration Charts - Advantech ARMA-C125-CRM Installation And Operating Manual

The coupling loss may vary with frequency and the specific characteristics of the RF circuit.
Accordingly, a calibration chart is provided via the front panel display for each sample port. The
calibration chart for the port identifies the coupling loss at a number of frequencies across the
operating range of the amplifier. The loss associated with intermediate frequencies can be
obtained by interpolation.
7.10.1 M C
ONITOR ALIBRATION
1. To view the monitor calibration chart for the RF sample port on an amplifier, use the [é é ] and
[ê ê ] keys on the front panel of the amplifier to access the Monitor Calibration sub-menu.
2. Press [Enter] once to view the Output Monitor calibration chart followed by the input
monitor calibration chart. The display is capable of showing one line of the calibration chart
at a time. Use the [è
associated with specific frequencies for each coupling port.
Example: If the calibration factor CALFACT for the output monitor at 6.150 GHz = - 40.2 dB
and the external Power Meter measurement shows Pm = +6.8 dBm, then the SSPA output
power will be calculated as following:
C
HARTS
STATUS: ____
MONITOR CALIBRATION
è ] and [ç ç ] keys to scan the chart in order to obtain the coupling loss
P = Pm + |C| = 6.8 dBm + 40.2 dB = 47 dBm.
out
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