APEX
™
Exciter Incorporating FLO
™
Technology
Exciter Maintenance
Maintenance and Troubleshooting
26
04s50
0.fm
03/08/07
888-2604-001
Page: 5-7
WARNING: Disconnect primary power prior to servicing.
A
Set the serial port parameters to match the exciter RS232 parameters for the
exciter port which is connected to the computer. This information can be
found at Setup > Serial I/O > Serial Setup 1/3 RS-232 screen on the exciter
GUI screen.
B
Hit OK to accept the setup.
7
Press Enter twice in rapid succession to access the exciter. If connection is successful,
a blank screen will appear.
A
The blank screen is on page 7 of 7 when viewed on the computer. To verify
a successful connection, press the left or right arrow key to change to the
page. Pages 1 through 6 will contain written information. When a successful
connection is established, use the left or right arrow key to access page 7, the
blank page.
8
Enter the following commands to turn off modulation and produce single center chan-
nel carrier.
A
Press o (lower case letter, not zero).
B
Press the space key.
C
Press 40000c8 (this is a hex number).
D
Press the space key.
E
Press 7.
F
Press the enter key.
9
The exciter should now have a single center channel carrier at its output.
10 Measure and record the carrier frequency.
11 To turn the modulation on and resume normal exciter operation, perform the follow-
ing.
A
Press o (lower case letter, not zero).
B
Press the space key.
C
Press 40000c8 (this is a hex number).
D
Press the space key.
E
Press 0.
F
Press the enter key.
12 The normal spectrum should be present at the exciter output.
13 Power down the transmitter, remove the padding added in step 3, and reconnect the ex-
citer drive to the transmitter.
