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50    February 2023

   

QST

   www.arrl.org

  

will find VNC software for free on any platform, 
including Windows, macOS, Linux, iOS, and Android, 
so you can remotely control the ARCO on any smart 
device. In my opinion, the VNC solution is the best for 
remote operations, as it doesn’t require any propri-
etary software. Note that all the screen  captures used 
in this review were taken from my MacBook using 
free VNC software. With the VNC software, you see 
the same thing as the ARCO touchscreen simultane-
ously with the unit.

The last tab is 

SYSTEM

, with six sub-tabs. The first 

one is 

SYSTEM

 (see Figure 13), and the five others are 

to set up the optional accessories (not tested in this 
review). In the 

SYSTEM

 sub-tab, you can upgrade the 

ARCO firmware directly if the unit is connected to the 
internet. From there you touch the 

LOAD

 button to see 

if there’s new firmware available. A pop-up screen will 
open and show you the currently running and latest 
available versions. To upgrade, there will be another 

LOAD

 button beside the version. Touching it will auto-

matically download the new version and upgrade the 
device.

Figure 10 

— The ARCO 

GENERAL

 settings menu tab.

Figure 11 

— The ARCO 

APPEARANCE

 settings menu tab.

Before connecting your rotator to the controller, 
ensure you have the correct pinout for your specific 
model. If you’ve just installed a new rotator, you will 
need to do a rotator centering. Everything is well 
explained in the manual. If you’re just swapping a 
controller of an existing rotator, you can skip the cen-
tering procedure. The next step is the calibration pro-
cedure. This is to ensure that the controller knows 
where the limits are for each direction.

After turning on the ARCO, it may take a few moments 
to boot. It’s less than 10 seconds when a rotator is 
connected. At the bottom left of the screen, there’s a 
gear logo that you just touch to enter the settings 
menu. To set up your rotator, you will need to go to the 

ROTATOR

 tab. You can see my settings in Figure 9.

The settings menu has six tabs. The first one 
(

GENERAL

) is for setting up your location with your 

grid square, the distance unit (kilometers or miles), 
time and date, the screensaver, the park position, and 
a few control options (see Figure 10). 

The second tab is 

APPEARANCE

, which has five sub-

tabs (see Figure 11). In the first sub-tab (

GLOBAL

), you 

can set your preferred look of the display. You have a 
day and night brightness adjustment, two background 
settings (light and dark — I prefer the dark look), and 
a few heading settings. The four other sub-tabs are 
for the map customizable presets (more on this later).

In the 

HEADING

 tab, you will find two sub-tabs, one  

for the calibration and the other to define three indi-
vidual antennas installed on the same rotator (see 
Figure 12). You can also set the mounting offset of  
the additional antennas versus the main antenna 
(antenna #1).

The 

LAN

 tab is for setting your IP network. You can 

remotely control this unit via any VNC software. You 

Figure 12 

— The ARCO 

HEADING

 (calibration) settings menu tab.

Summary of Contents for XPA12B

Page 1: ...Product Reviews February 2023 Xiegu XPA125B 1 8 50 MHz 100 W Amplifier...

Page 2: ...80 W on 6 meters typically with less than 5 W of drive Transmit and receive switching is provided by an internal relay There is an amplifier bypass switch and the XPA125B is also bypassed when it is...

Page 3: ...put versus output The XPA125B display power readings are compared to a NIST traceable Array Solutions PowerMaster input and Mini Circuits PWR 6GHS sensor and calibrated attenuators output The first th...

Page 4: ...0 M 1 0 W 0 1 W 68 W 63 W 18 0 dB 6 9 7 2 0 W 0 1 W 86 W 82 W 16 1 dB 8 8 3 0 W 0 2 W 91 W 87 W 14 6 dB 8 5 9 4 0 W 0 3 W 93 W 89 W 13 5 dB 8 8 9 5 0 W 0 4 W 97 W 94 W 12 7 dB 9 1 9 6 M 1 0 W 0 1 W 37...

Page 5: ...throttle the output back from full power to achieve the cleanest signal from the amplifier on any band The amplifier showed another unexpected anomaly The input power was reading significantly low on...

Page 6: ...well by providing keying and auto matic band changing for the XPA125B The XPA125B control interface is a miniDIN6 connector so I built interface cables for the KX3 and the QCX mini using a mini DIN6P...

Page 7: ...CW Hotline has included a trace on the printed circuit board PCB to a jack input for your key There aren t any surface mounted parts which is good for new hobbyists Altogether there are just over Ham...

Page 8: ...center post One nut was below the PCB and one nut was above the PCB followed by a washer on top for grounding I have found this solution to work effi ciently and have yet to feel the need to tighten t...

Page 9: ...practiced sending Morse code between units and noticed a slight delay people discussing the CW Hotline it is usually to practice code over the internet However having the ability to operate CW remotel...

Page 10: ...to improve as I keep practicing and testing myself online against others in the VBand Manufacturer Ham Radio Solutions www hamradio solutions Price kit version 50 each plus shipping assembled version...

Page 11: ...rollers together There s a legacy DB9 SERIAL RS 232 computer control port a LAN Ethernet RJ 45 port to control the unit over IP a USB B port USB for computer control a USB A port FW for keypad connect...

Page 12: ...ell explained in the manual If you re just swapping a controller of an existing rotator you can skip the cen tering procedure The next step is the calibration pro cedure This is to ensure that the con...

Page 13: ...a specific DXCC country or prefix or particular WAZ or ITU zone to turn your antenna in the proper direction Touching the NEW azimuth will toggle between the short and long path bearing It shows that...

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