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5.10 RF INPUT AND OUTPUT MONITOR PORTS
The input and output monitor ports on the front panel provide a means to measure input and
output signals (in dBm) using appropriate test equipment. The coupling loss normally associated
with RF sample, must be added to the power level measured at the sample port in order to obtain
the proper value for input or output power level.
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.
5.10.1 M
C
ONITOR
ALIBRATION
1. To view the monitor calibration chart for the RF sample port on an amplifier, use the [ ] and
[ ] 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. The display is capable of
showing one line of the calibration chart at a time. Use the [
chart in order to obtain the coupling loss associated with specific frequencies.
3. Example: IF CALFACT for output monitor at 6.150 GHz = 40.2 dB, External Power Meter
measurement shows
Pm = +6.8 dBm, SSPA output power will be calculated as follow:
P
= Pm + |C| = 6.8 dBm + 40.2 dB = 47 dBm.
out
C
HART
STATUS: ____
MONITOR CALIBRATION
STATUS: ____
MONITOR CALIBRATION
ARMA-C250-CRM
] and [
] keys to scan the
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