User's Manual

ACT-VHF-I-500PA User Manual
ACT-VHF-I-500PA-USR-DOC-V1.1, 07/02/2019 Page 8 of 31
1.2 Back Panel
 RF IN
 Connector: N
 Impedance: 50 Ω
 Note: If input power from RF_IN is lower than rated input value, the output power will be lower
than rated output power accordingly. This is because the PA has a fixed gain. If the input level
from RF_IN is higher than the rated value, it will result in RF output distortion and performance
deterioration. If the input level is more than 1 dB higher than the rated value or the output power
is higher than preset FWD threshold, it may trigger the current-limiting function. The PA will
enter the auto-protection mode, and there will be reduced RF output or even no RF output.
 RF_OUT
 Connector: 7/16 DIN
 Impedance: 50 Ω
 Note: RF_OUT must be connected with a load, otherwise the PA will enter the auto-protection
mode and there will be in no RF output.
 RS485
 Connector: DB9-M
 Note: Connected to REMOTE (PRS-485-1) port of Controller, which is
used for control and communication between the Controller and
the PA.
 AC INPUT: 176~300VAC, 47~63Hz, 16A/220VAC (single-phase, 3-wire – L1, L2, GND)
 AC Power Breaker: ON/OFF