Specifications

3-26 888-2857-001 5/9/13
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation
Platinum VAX-C Series
3.4.2.1 Storing an RTAC Correction Set
From the Stored Correction Sets sub window, up to four RTAC correction setups can be
saved in Set 1 through Set 4. There is an option to rename each stored setup. The setup
can be stored for many reasons, such as when the transmitter was first installed, or after
transmitter maintenance. This feature is also useful in comparative testing.
Follow the procedure below to save an RTAC Correction setup.
STEP 1 The transmitter should be operating properly at 100% power.
STEP 2 Refer to RTAC Setup Page 1 on left Figure 3-16 on page 3-24. Set the
Linear and Nonlinear RTAC corrections to Adapt.
STEP 3 After a short time, the number of successes and attempts will increment
above the RTAC Linear and Nonlinear Bypass selection soft keys. Both
the Linear and Nonlinear correctors should show one or more successful
corrections. Verify that the measured performance of the signal is
adequate using appropriate test equipment. LSB and USB shoulders are
found in the Exciter Home Performance sub window Figure 3-12 on
page 3-17. These parameters are discussed in Table 3-9 on page 3-17,
Performance sub window.
STEP 4 After the RTAC adaption has been successful, press the RTAC Linear
and Nonlinear Hold soft keys to hold the adaptive process steady.
STEP 5 By selecting Next soft key, go to RTAC Setup Page 2. Select a correction
set. The title of the selected set may be changed by clicking in the white
box of the desired set. Press ‘Save’ to store the RTAC setup.
3.4.2.2 Operate RTAC from a Stored Filter Set
To operate RTAC from a Stored set, follow the procedure below.
STEP 1 In the Stored Correction Sets sub window of the RTAC Setup Screen 2
(on right Figure 3-16 on page 3-24) press the Select soft key to the left
of the desired correction set. The Select button will turn Green. Select
Prev soft key to return to RTAC Page 1.
STEP 2 On the RTAC Setup Page 1 (on left Figure 3-16 on page 3-24) set Linear
and Nonlinear to Stored for operation with the selected stored set.