Calibration - Ametek UPLC-II System Manual

Figure 5–14. Example of the Calibrate Page (ON/OFF Mode)
Figure 5–15. Example of the Calibrate Page (FSK Mode)

5.8 Calibration

See Figs. 5–14 & 15. Now that the settings have
been submitted to the UPLC-II™, the transmitter
and receiver levels must be calibrated.
The table in the middle of this web page shows the
values that will be used to calibrate the transmitter
and receiver. In the case shown in the Figures
above, the transmitter will be calibrated to 1 W low
power and 10 W high power. The receiver will be
calibrated for a 10 dB fade alarm and the fade mar-
gin will be set to 15 dB.
You must start by calibrating the transmitters at all
line terminals first. If you have not changed the
default TX power levels of 1W (low)/10W (high),
then you do not need to calibrate the transmitter
because the factory always calibrates at these levels
before shipping. If you need to calibrate the trans-
mitter, you will need a 50/75Ω non-inductive resis-
tor, depending on the TX output impedance setting.
This resistor must be able to handle at least 10 W of
power for a brief period of time. It is suggested to
use a 25 W, 50/75Ω non-inductive resistor. First
turn off the power and then remove the transmitter
January 2016
Chapter 5. installation/Commissioning Procedure
coax from the rear of the chassis. Then connect the
25 W, 50/75Ω non-inductive resistor to the trans-
mitter output coax connector J1. Now turn the
UPLC-II™ power back on. The transmitter may be
calibrated by selecting the "Transmitter" button on
the calibration web page. When you select the
transmitter button the following dialog box will pop
up.
Calibration Instructions Dialog Box
Click the OK button in the dialog box. The trans-
mitter will now be calibrated to the low and high
power settings. The web page and the display on the
front panel will show the calibration progress.
After the transmitter is calibrated, turn off the unit
and remove the load. Then reconnect the coaxial
cable that goes to the line tuner and turn the trans-
mitter power on. The transmitters at all line termi-
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