4. LED’s
48
Lock/Tune:
In unconnected/STBY state (e. g. while receiving RTTY, PACTOR Unproto, etc.):
Forms a 2-LED tuning indicator together with the
QUAL
LED. Bright green indicates best
tuning of the RX signal, very dim red or un-lit LED indicates poorest frequency tuning of the
RX signal. If
QUAL
indicates better tuning than
Lock/Tune
, the frequency of the RX signal is
too low, and vice versa. With some practice, the 2-LED tuning indicator allows a tuning
accuracy of at least +-10 Hz.
In connected State (PACTOR):
Tune
flashes red while the unit is in progress with automatic frequency and phase correction.
Lock is lit green when the tune process is successfully terminated, the frequency deviation is
compensated and the phase is stable.
CON/ISS
CONnected
is permanently lit green in connected condition (AMTOR, PACTOR, Packet-
Radio) permanently. In STBY condition it blinks in one-second-intervals when an unread mail
for the own address (= MYcall) is contained in the PTC-mailbox. It flashes fast if the modem
waits for a Bluetooth connection (USB not connected and Bluetooth option installed).
ISS is lit red in connected condition, when the unit is the
i
nformation-
s
ending-
s
tation (has “the
keys”).
ON/STBY:
ON is lit green when the unit is switched on and operating. STBY is lit red when the unit is in
“stand by” mode, which means switched off but with external power applied to it. In this
condition the unit can be switched on by touching the front panel sensor switch. Doing this, the
LED will swap from red to green.
Miscellaneous:
Loading:
At startup, the firmware must be loaded from the Flash-ROM into the 32 bit static RAM. This
is indicated by the 5 status LED’s in the middle, where every second one will lit:
O
P
O
P
O
Update:
When the firmware or the BIOS are updated, then the 5 status LED’s in the middle show an
illuminated dot running from left to right.
