The Radio Shack unit has ONE LED per line,
and has a MULTI COLOR function
Green is HIGH - Red is LOW
TWO LEDS PER LINE testers WORK the” same”,
Except that the two LED's colors are reversed.
Green is LOW - Red is HIGH
These pictures are 'shrunk' to fit the browser screen,
but They are really much larger!
RIGHT CLICK on the above Graphics files
Choose ''Save Image'' to download to your computer.
Choose ''View Image'' to see it FULL sized .
TD Transmit Data from computer to RADIO RD Receive Data from RADIO to computer RTS Ready to Send CTS Clear to Send DSR Data Set Ready DCD Data Carrier Detect DTR Data Terminal Ready
AT MAIN MENU (Not Scanning)
IF your commport is correct:
“X” means “usually the case ”, but not “always”
. DTR should be LOW . CTS should be LOW X . RTS should be LOW X . TD should be LOW X . RD should be LOW
AT SCANNING MODULE (While Scanning). DTR should be HIGH ALWAYS HIGH or self powered interfaces will not get power (won’t work) . CTS Flickers between red and green OR stays HIGH . RTS Flickers between red and green OR stays HIGH . TD HIGH Should FLICKER, but only HIGH when data flowing (scanning) . RD should be LOW Depends, but with AR8000 and most modern radios, Flickers HIGH but with ‘delayed sync’ with TD
IF you are scanning, mainly TD and RD will flicker so fast they appear as one color (HIGH), BUT, if you click on pause, while the ‘rate of flow’ changes to about 2 times a second, the signal strength ‘polling’ should show activity. RETURNING to main menu should then again show settings as above. IF the DTR does not change status, this ESPECIALLY means the wrong comm port is chosen OR Windows is using it for some other ‘device’. You will have to resolve THAT issue before progressing further.