User's Manual Part 3

Setup & Detailed Alignment Procedures - 146 -

Affinity® LBD-200C-N1 Transmitter

Product Manual

4. Using NORM DEBUG MODE 1, read the values displayed in the second row. Multiply

the value in the cell titled LOW by 256 and add this to the value in the cell titled HIGH.

Record the total value.

5. Locate the correct setting partition, you should see two fields: one labeled address, and

the other labeled Data. Enter 65 into the address field.

6. Enter the recorded value from the step above into data and click send. At this point, the

scale factor will be incorporated into the meter system.

7. Confirm that 25% is displayed on the front panel meter under SYSTEM FORWARD

POWER.

8. Now close EMSET 4.1, and reopen EMSET 5. Connect as before.

9. Raise ALC AUTO REF until system reaches nominal power and 100% on the front panel

meter.

10. This completes the forward power meter calibration.

11. Set HEALTH SNAPSHOT 65535 to clear any faults.

22.3 Automatic Level Control

1. Using EMSET, Place system back to auto ALC mode by setting ALC MODE SELECT =

2. Lower ALC AUTO REF until system reaches nominal power.

3. Perform linear and non-linear pre-correction of transmitter using the front panel menu via

the Exciter (see below). After correction, the exciter output level should still be at -

18dBm. If not, readjust output back to this nominal level.

4. With the exciter now at -18dBm, If necessary, go back to refine ALC AUTO

REFERENCE to nominal power after correction.

5. Set HEALTH SNAPSHOT 65535 to clear any faults.

22.4 Upconverter Power Meter Calibration

1. Refresh the monitored variables under normal debug mode 1.

2. Under the monitored variables frame, read values displayed in the eighth row. The value

in the cell titled LOW is first multiplied by 256 then added to the value in the cell titled

HIGH. The resulting value from this operation is now entered into UPCONVERTER

FORWARD POWER REFERENCE parameter. This completes the preamplifier meter

calibration.

3. Set HEALTH SNAPSHOT 65535 to clear any faults

22.5 Reverse Power Calibration

1. Verify the level at the TRU-RMS Detector is +5dBm +/- 2dbm. If not, troubleshoot. (The

level is determined by a fixed coupling factor and fixed attenuation values based on

transmitter output power rating; if the level is out of tolerance, something is wrong in the

RF chain.)