4. LED’s
Connected / Send/PTT:
Connected lits in connected condition (AMTOR, PACTOR) permanently. In STBY condition
it blinks in 1 second tick when an unread mail for the own address (= MYcall) is contained in
the PTC-mailbox.
Send/PTT lights when the PTC is actually the information sending station.
In Packet-Radio mode Send/PTT lits when the PTT is keyed and the transceiver is transmitting.
DQPSK / DBPSK:
Is active when receiving or sending a DQPSK or DBPSK modulated packet in PACTOR-II
mode. Also operates in Listen and Unproto.
MaxSpeed/HiSpeed:
MaxSpeed lits during 16-DPSK packets (also with Unproto and Listen modes). HiSpeed lits
during PACTOR-I packets which are 200 baud (also with Unproto and Listen), and when
PACTOR-II packets using 8-DPSK are being used.
Traffic/CD / Error/Rq:
When Traffic/CD lits the system transfers data and the channel is in good condition.
In STBY condition (but not in Listen mode) it serves as channel busy indication and lits when
the channel is occupied.
In Packet-Radio it serves as Carrier-Detect (CD) indication.
When Error/Rq lits, a data or control packet contains corrupted data and cannot be decoded
correctly
Tune:
Under optimum conditions, only the two outermost LED´s of the tuning indicator are lit. With
PACTOR-II the frequency offset is additionally displayed (center display LED) in red. In this
case the middle of the tuning indicator is corresponding to the own frequency and the LED in
the middle represents the frequency of the distant station. If the middle indicator drifts to the
left, the frequency of the distant station is too low. If the middle indicator drifts to the right, the
frequency of the distant station is too high.
Miscelaneous
The tuning display is also used to indicate several system conditions:
Autobaud:
After power-up the PTC-IIex tries to detect the baudrate of the terminal connected to. It
indicates this with a LED bouncing between the right and the left corner.
Loading:
After a firmware update the firmware needs to be copied to the 32 bit wide SRAM (loading).
This condition is indicated with each second LED being on and off:
Update:
When the firmware or the BIOS are updated then the tuning-display shows an illuminated dot
running from left to right.
48
To Next Page
Loading...
