XIEGU COMMUNICATIONS
9
3.1.4
Connection method between XPA125 and other QRP radio
If you want to start the XPA125 power amplifier and put it into the transmit
mode, you need to set the PTT port to a low level [level≤0.1V].
If the PTT output signal of the transceiver is at high level, the high level
needs to be converted into a low level, and then input to the XPA125
[ACC-PTT] port.
Pin 2 of the XPA125 ACC port is the PTT input port
In order to achieve automatic band switching, the corresponding band voltage
is needed. XPA125 band control voltage information is as follows.
BAND
LEVEL(mV)
BAND
LEVEL(mV)
BAND
LEVEL(mV)
1.8 MHz
230
14.0 MHz
1380
50.0 MHz
2530
3.8 MHz
460
18.0 MHz
1610
----
----
5.0 MHz
690
21.0 MHz
1840
----
----
7.0 MHz
920
24.0 MHz
2070
----
----
10.0 MHz
1150
28.0 MHz
2300
----
----
3.2
Procedure:
3.2.1
Using the power amplifier unit [PA unit] (ATU unit is set to BYPS)
-
Press the PA key, so that the state of the amplifier is [INUSE].
-
If your connected transceiver is an X108G or X5105, please set
the output power to 5 W.
-
If you are using any other QRP transceiver, please set the output
power to 1 W.
-
Set your transceiver to CW mode, press the CW key to
transmit, and the XPA125 amplifier will be activated.
-
The output power of the XPA125 can be adjusted by adjusting
the output power of the connected transceiver.
