Anywave Marble Series, User Manual

Page: 7 / 33

PA-U8D-C-FA User Manual
ACT-PAU8D-USR-DOC-V2.0, 05/20/2022 Page 7 of 33
1.2 Back Panel

PRE PA—RF IN1/RF IN2

Connector: SMA

Impedance: 50 Ω

Note: This is the input of the pre-amp section and should be connected to the output of the
exciter(s). If input power from RF_IN1/2 is lower than the rated input value, the output power
will be lower than the rated output power accordingly. If the input level from RF_IN1/2 is higher
than the recommended value, it will result in RF output distortion and performance deterioration.
If the output power is higher than the 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.

PRE PA—PA OUT

Connector: SMA

Impedance: 50 Ω

Note: This is the output of the pre-amp section and should be connected to PA-RF-IN (the input
of the final stage). IMPORTANT : A SMA-to-SMA jumper is provided with the unit and has to
be connected between PRE-PA-OUT to PA-RF-IN (as shown above in the red rectangle).
Otherwise, there is no drive to the final stage of the PA and there is no output power.

RF_OUT

Connector: 7/16

Impedance: 50 Ω

Note: RF_OUT must be connected with a load with proper impedance, otherwise the PA may be
damaged.

REMOTE

Connector: DB9-M

Note: Connected to the REMOTE (RS232) port of exciter A/B (with an
RS232-to-485 adapter), which is used for control and
communication between the PA and the exciter A/B.