11
HE-12/HE-4
Instruction Manual
Operating Mode Selection
The unit has 4 valid operating modes: STD CATV, IRC, HRC & broadcast UHF/VHF. The AMCM unit comes factory set to operate in
the Standard CATV mode. To change the operating mode:
1. Simultaneously depress
p
UP and
q
DN for approximately 5 seconds.
2. The Channel LED display will switch to the operating mode selection.
3. Use
p
UP or
q
DN to select the desired mode:
a. C = STD CATV
b. H = HRC
c. I = IRC
d. U = broadcast (VHF/UHF)
4. After selecting the desired mode depress
ENTER
to set the mode.
5. The unit will return to the channel display mode.
a. Programming will reflect the mode chosen – See Appendix A for a detailed frequency plan.
b. The programming mode will also flash continuously during the programming process. The LED display will
continue to flash for 30 seconds if
ENTER
is not depressed and then will return to the display of the previously
programming channel and mode entry setting.
Troubleshooting - AMCM-860
A continuous flashing CH Display indicates a Error Condition detected by the unit microcontroller. Sample conditions include:
• Channel Selector Entry does not match the channel number on which the modulator is operating, the display will flash for 30
seconds and then revert back to the previous CH entry.
• E1 is displayed if the Input & VCO is Not Locked
• E2 is displayed if the Output VCO is Not Locked
Possible Error Condition Scenarios
1. An Error Condition may occur when a channel number was accidentally altered by changing the push button switch to a
number that is different from the output channel set in memory, or if there was a switch malfunction.
2. An Error Condition may occur when a user sets a new mode and the previously programmed channel is not in the new
mode’s channel range.
Correction Suggestions
The User should perform the following steps to correct an Error Condition:
1. Check that the Channel Display is set to the desired channel and reset as appropriate
2. Check that the unit is set to the appropriate desired operating mode
3. Verify the unit output on a spectrum analyzer
4. Disconnect and reconnect power to the unit
If an error condition continues to be displayed, unit should be replaced and serviced.
SEE APPENDIX A FOR A COMPLETE LIST OF AVAILABLE CHANNELS.
STD CATV; IRC & HRC 1-135 AND BROADCAST 2-69
Jumper 7
Pin
1 2 3
1
2
3
3 2 1
Jumper 6
Jumpers 9, 11 & 10
Jumper 2
Ö
Stereo PCB
jUMPER SETTINGS
MONO
STEREO
Stock No. 7766B
Stock No. 7766S
J2 - PIN 2-3
J2 - PIN 1-2
J6 - PIN 2-3
J6 - PIN 1-2
J7 - PIN 2-3
J7 - PIN 1-2
Internal jumper Settings - AMCM-860B
