User's Manual

MHPTV TX User Manual
MHPTV-USR-DOC-V3.0, 10/18/2019 Page 74 of 148
2.4 Power Amplifier – PA-8D-C-FA
The MHPTV TX may be fitted with 1, 2, 3, 4, 5, 6, or 8 PA-8D-C-FA PA modules.
Each module consists of a total of 8 BLF888E (Doherty) devices per PA drawer. Each
PA is also fitted with two pluggable 50V power supplies.
Front Panel
The front panel of PA is shown as below. The LED indicators and ports are listed below.
 LAN: 10M/100M Ethernet port for web-based remote control (IP address:
192.168.1.200)
 LED_PWR
 The green light will be on when the DC voltage of the internal power supply
is within the normal range (48 VDC ~ 52 VDC).
 The green light will flash when the DC voltage of the internal power supply
is out of the normal range (48 VDC ~ 52 VDC).
 The green light will be off when the external power supply is turned off, or
the internal power supply module does not work.
 LED_RS485
 The green light will flash once per second when internal communication is
normal.
 The green light will stay constantly on or off when internal communication is
abnormal.
 LED_FWD
 The blue light will be on when the TX power level is stable and higher than
10 W.
 The blue light will flash once per second during the ramp-up process and the
TX power level is higher than 10 W.
 The blue light will be off when the TX power level is less than 10 W, or it’s
turned off by configuration or for protection. There are several situations
which will result in auto-protection mode, such as the input power is too
high, the reflected power is too high, or the temperature is too high. When
the transmitter reboots, the default setting of TX status is OFF.