Using YCCC MOAS II

SkookumLogger communicates directly with a YCCC relay switching controller. The technical documentation is the MOAS II Programming manual V1.0 linked at the end of the Downloads section at the MOAS II site. You may want to skim this document to learn about capabilities and terminology.

To set up your MOAS, connect the MOAS USB port to your computer, connect the MOAS TX port 1 to you transceiver key line (this prevents hot-switching), and connect the MOAS POWER port to a suitable power supply.

The Antennas window in SkookumLogger describes each of your antennas. The Command column in Antennas table defines which MOAS relay drivers are activated when you choose an antenna in SkookumLogger. SkookumLogger supports two kinds of antennas, transmit-receive and receive-only. Only one antenna of each kind can be active, but changing the choice for one kind doesn’t affect the other kind.

For transmit-receive antennas, the command is !1Bx followed by a list of the relay drivers to be activated, followed by a semicolon. For example, !1B20IP; activates antenna 2, and relay drivers 0, I, and P. The antenna number (x) and the relay drivers are single characters expressing one of 64 possible values using the “sixbit” code describe on page 9 of the manual.

For receive only antennas, the command is !0Xx followed by a list of the relay drivers to be activated, followed by a semicolon. For example, !0X0Za; activates antenna 0 and relay drivers Z and a, again using the sixbit representation.

MOAS can support up to 64 antennas. The antennas can distributed among up to 6 stations, but the antenna selection UI in SkookumLogger will need to be modified to handle more than one station.