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Dave
ROS is MFSK and requires audio to
rf translation , there is support for
SDR's , these are listed in the software ,
modulation is phase continuous , suitable for
class e/d ..no stability requirements as
system has afc ..if there is 'no' rx
audio , the CQ beacon timer will not
countdown as it monitors the channel
for activity to prevent collisions , needs 3 minutes of silence
before transmitting.
The full Opera system requires
audio to rf translation as the carrier
is placed in the lowest s/n slot
at each rx/tx changeover , the
provision of a com-port CW drive allows
access via 'cw only' systems .....
PIC stand alone TX only beacons may
also be used
ROS / Opera are free running ,
with no time lock or high stability
requirements
73-G,
You will find the Ros and
Opera 'dial set usb' qrg's listed in
the software and cat linked to the
tx/rx if applicable
ROS MF , 467.000 USB and
136.000 USB
ROS-MF 2/7 share the same audio
frequency of 1500 Hz centre tone ,
modulation is +/- 50 Hz [ may be 49 to
fit the as was 100 Hz b/w limit ]
software can auto detect 2 /
7
[ NB , ROS-MF supports only
1 qso per 100 Hz channel , ROS-HF supports multiple
access to 1 channel ]
Opera Dial set 136.000
USB and 477.000 USB
B/W approx 2 Hz
Decoder pass bands
477KHz OP4 RF
= 478.6<>478.8 KHz
477KHz OP8 RF
= 478.5 <> 478.6 KHz
136 Op32 = 137.500 <>
137.600 KHz
136 OP8 137.6 <>
137.7 KHz
Down load from :-
Support groups etc
Sent: Monday, February 24, 2014 11:45 AM
Subject: LF: 472kHz help
Dear all
I'd like to try, JT9, WSQ, ROS, Opera etc but I can't
seem to find a definitive list of dial frequencies / actual frequencies for all
the modes in use. Has anyone put such a list together? If not I'll
assemble one from information received. Thanks Dave
G3YXM
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