User's Manual Part 3

Setup & Detailed Alignment Procedures - 145 -
Affinity® LBD-200C-N1 Transmitter
Product Manual
22 Setup and Detailed Alignment Procedures
The normal start-up procedure for installation and operation of the Thales transmitter is found in
the Affinity® Quick Start Procedure outlined in the previous section. In most cases, detailed
maintenance calibration may be achieved by running the “Affinity Control GUI” software tool,
which is typically loaded on a laptop computer.
NOTE: The user should be familiar with this software prior to attempting any calibrations. Refer
to the Affinity Control User’s Guide document number # 47267151-108 for a detailed description
of software operation.
Manual Alignment Process
22.1 Power Limiter & Manual Gain Calibration
1. Using the front panel key switches, place the PA modules to the OFF/UNLOCKED
position.
2. Using EMSET, Set ALC MODE SELECT = 0.
3. Connect a cable to the RF Sample Output located on the preamplifier front panel.
4. Set POWER LIMITER value to zero. At this point, maximum output power should be
+9dBm from the preamplifier direct output. Measured at front panel, sample would be -
21dBm max.).
5. Set ALC MODE SELECT = 1.
6. Set ALC AUTO REF to 4095.
7. Using the front panel key switches, place the PA modules to the ON/LOCKED position.
8. Raise the POWER LIMITER value until power is 1db above the nominal power.
9. Set ALC MODE SELECT back to 0.
10. Raise ALC MANUAL REF from parameter value of zero until nominal power is achieved.
11. Set HEALTH SNAPSHOT 65535 to clear any faults.
22.2 Forward Power Calibration
1. Using EMSET, Refresh the monitored variables under normal debug mode 1.
2. Under monitored variables frame, read values displayed in the second row. The value in
the cell titled LOW is multiplied by 256 and added to the value in the cell titled HIGH.
The resulting value from this operation is now entered into the SYSTEM FORWARD
POWER REFERENCE parameter.
3. Use EMSET to set ALC AUTO REF until the transmitter output power is 6dB +/- 0.1dB
lower than nominal output power. This -6dB setting is critical for the accuracy of the front
panel display.