XIEGU COMMUNICATIONS
3.1.3 Connection method between XPA125B and other QRP radio
If you want to start the XPA125B 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 XPA125B
[ACC-PTT] port.
Note: If a voltage of
≥
3.2V is applied to the PTT port of the XPA125B, the internal
processor will be permanently damaged!
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. XPA125B band control voltage information is as follows.
BAND
LEVEL(mV)
230
460
690
920
BAND
LEVEL(mV)
1380
1610
1840
2070
BAND
50.0 MHz
----
----
----
LEVEL(mV)
2530
----
----
----
1.8 MHz
3.8 MHz
5.0 MHz
7.0 MHz
10.0 MHz
14.0 MHz
18.0 MHz
21.0 MHz
24.0 MHz
28.0 MHz
1150
2300
----
----
3.2 Procedure:
3.2.1 Using the power amplifier unit [PA unit]
(ATU unit is set to OFF)
-
-
Press the PA key,so that the state of the amplifier is
[ON].
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 XPA125B amplifier will be activated
.
The output power of the XPA125B can be adjusted by adjusting
The output power of
the connected transceiver.
-
-
-
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