9/15/06 888-2586-001 5-19
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignment
Platinum Z16HD+
STEP 3 On the Diagnostics Display, check the VSWR fault and foldback
settings. Press [HOME, MORE, CONFIGURATION, B, A, D, C]. If
necessary, set it to 1.70. Press [BACK] to update the information.
STEP 4 Press [D], to go to the VSWR Foldback screen. Set the VSWR
FOLDBACK to 1.50. Press [BACK] to save the settings.
STEP 5 Press [HOME, MORE, CONFIGURATION, C, A, C]. This should take
you to the screen in Figure 5-7. Set the value of “REFLECT FACTOR”
to 0.000613. To access the edit controls for the screen press and hold the
[D] button and then press the [C] button. Press [BACK] to update the
information.
Figure 5-7 Reflected Calibration Factor Screen
[HOME, MORE, CONFIGURATION, C, A, C]
STEP 6 Open the back of the transmitter and locate the Reflected power
directional coupler (it should be the one on the left side). It is marked
with a small tag. If necessary trace the wire numbers to determine the
correct coupler. Be very careful to keep track of the top-to-bottom
orientation. Loosen the 2 clamps until the Reflected Coupler can be
taken off. Now rotate the coupler 180
o
and re-install it. This lets the
coupler sense forward power. Be sure to push the clamps as far toward
the outside edge as possible and do not over-tighten. Also make sure the
BNC cable is attached.
STEP 7 Set the Transmitter LCD meter (the right-hand display) to read RFL
PWR in kW. If it reads VSWR press and hold the RFL PWR button for
about 5 seconds and the reading will change to kW.
NOTE:
If Forward Power is not yet calibrated, then an external meter will have to be
used for the next step.
STEP 8 Press the RAISE button to bring up the transmitter power very slowly
until the Forward Power meter reading is the correct level, based on the
calculation below:
Use the following formula, based on your desired TPO for your
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