Epson MFJ-1278B manual Real-Time Clock and Time Stamping, WB9FLWN7CL C KV7BN2WX D

MFJ-1278B MULTI-MODE ADVANCED OPERATION

If you want to monitor stations selectively, you can set up a list of up to eight callsigns with the command LCALLS. The callsigns in this list are regarded as "buddies," i.e., the only stations you want to listen to if BUDLIST is ON. Otherwise, the stations in the list will be ignored, and all other stations will be monitored.

You can operate a group conversation with some data integrity by having the stations connect in pairs and setting MALL ON and MCON ON. This does not insure that every packet is received at every station, but it does insure that a packet involved in a collision will be retried. If you have an odd number of stations participating in this sort of conversation, one station can connect to himself via another station as digipeater.

or example, WB6YMH, WD0ETZ, WA0TTW, W1BEL, and K9NG wish to carry on a group conversation. In order to make all the transmissions as reliable as possible, the following connections are made.

WB6YMH connects to W1BEL

WA0TTW connects to K9NG

WD0ETZ connects to WD0ETZ via W1BEL

If each station specifies MCON ON and MALL ON, each station will see the packets sent by all the others.

Ordinarily, only text packets are displayed. If you want to see some of the protocol packets, you can set MCOM ON and connect, disconnect, disconnect acknowledgments, and DM (connect-request rejection) packets will be displayed. For example,

WB9FLW>N7CL <C>

KV7B>N2WX <D>

indicates connect and disconnect packets. Disconnect acknowledgments are designated <UA>, and DM packets are <DM>.

You can cause the MFJ-1278B to "filter" certain characters from monitored packets with the command MFILTER. This allows you to remove, for example, form-feeds, bell characters, or extra <LF>s that may be necessary to the stations involved in a connection, but which may interfere with your display. You can specify up to four characters by giving the ASCII character codes in hex or decimal.

Real-Time Clock and Time Stamping

You can enable the MFJ-1278B's real-time clock by setting the date and time with the command DAYTIME. Once you have set the clock, you can request the time by entering DAYTIME with no parameters. The format of date and time display is controlled by the