User's Manual

MHPTV TX User Manual
MHPTV-USR-DOC-V3.0, 10/18/2019 Page 62 of 148
2.1.2 Control Unit（CTL-M）
For 4 to 8 PA configurations, the TX Control Unit CTL-M consists of a pre-amp,
an N-way splitter with “Optitune” (phase/gain adjustment) circuit, and a powerful
control system. It receives the RF input(s) from the exciter(s), performs the pre-
amplification, and sends RF output to an N-way splitter with phase/gain adjustment
circuit, finally to feed 4, 5, 6 or 8 PAs. The CTL-M communicates over an RS-485
serial bus to the PAs and Exciter(s) installed in the system and monitors system
Forward, Reflected, and Reject load power.
Front panel
The front panel of the Control Unit is shown below.
 Color touch screen
 LED_OK
 If the green light is ON, then the transmitter is working in OK mode.
 LED_ALARM
 If there is an alarm, the red light is ON, and the transmitter will shut down its
output. The most common alarms include Over-drive/over-current of PA
modules or Preamp, high reflected power of PA modules or Preamp, high
absorbed power, over temperature of PA modules or Preamp, etc. Please refer
to Status Bar and LOG from the touch screen of Control Unit for details.
 RESET (reserved)