10/6/10
888-2629-200
5-15
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Maxiva ULX COFDM Series
•
0.875V ---- 50V
5.8
Power Calibrations
Other than system forward & reflected calibirations during installation, power
calibration should be required only if the down converter board (used in analog
systems), the RF detector board (in TCU), or if a directional coupler or signal cable is
replaced. However, calibration is simple and can be done whenever it is deemed
necessary. The only required power calibrations are:
a.
Total System Forward Power (after filters)
b.
PA Cabinet Forward Power (before filters)
c.
Total System Reflected Power (after filters)
d.
PA Cabinet Reflected Power (before filters)
e.
Exciter Forward Power
f.
PDU Forward Power
NOTE:
Forward and Reflected power calibrations should only be done while operating
the transmitter into a known good load or a low VSWR antenna system.
5.8.1
Forward Power Calibration
Equipment Used:
•
Maxiva Series precision directional couplers (precision meaning that the
coupling ratio has been measured at the exact operating frequency)
•
Averaging power meter with power probe
NOTE:
Power calibrations must be performed using the local GUI screen. In order to
change calibration settings the user must supply a login and a password at the
admin level. When the transmitter ships from the factory the local GUI default
login is "admin" and the default password is "harris" (do not include quotation
marks in login or password). If you change passwords be sure to retain them in a
secure location. You will not be able to regain access without the password.
Summary of Contents for Maxiva ULX
Page 2: ...ii 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 4: ...iv 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 6: ...MRH 2 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 8: ...viii 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 9: ...10 6 10 888 2629 200 ix WARNING Disconnect primary power prior to servicing ...
Page 10: ...x 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 12: ...xii 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 14: ...xiv 888 2629 200 10 6 10 WARNING Disconnect primary power prior to servicing ...
Page 18: ...Table of Contents Continued 4 ...
