Specifications

5/9/13 888-2857-001 5-11
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Platinum VAX-C Series
Figure 5-5 on left - System Calibration on right - System Calibration options
The procedures described below assume use of the VAX-C LCD menus screens. Power
calibrations include:
• Factory Fwd/Rfld - System forward and reflected power at output of
transmitter before band pass filter (BPF). Typically performed at 205 MHz.
• Field Fwd/Rfld - System forward power at output of transmitter before BPF.
Typically performed at operating frequency for maximum accuracy.
Equipment Used:
• An averaging power meter (with probe) similar to the Agilent E4418B with appropri-
ate adapters. Meter should be capable of displaying measured values in Watts or in
dBm.
• Precision directional coupler (precision meaning the coupling value have been mea-
sured for the operating frequency of 205 MHz).
NOTE:
Read and understand the applicable power calibration procedure before begin-
ning. The procedures below assume use of the LCD display and the control but-
tons on the front of the VAX-C. The procedure can also be performed using web
browser screens. Web browser calibration screens are shown in Figure 5-5.