Introducing a New Product - American Radio Relay League

High-speed multi P

© 2013 Harry Bloomberg W3YJ 2

PSKR modes

26 March 2013 http://wpaares.org

High-speed Thor m

© 2013 Harry Bloomberg W3YJ 2

modes

26 March 2013 http://wpaares.org

PSK tips

Fldigi has checkbox for
Automatic Frequency C

Can be used to track PS
But...can lead to wander
Could lead into QRM
So, for PSK, try either o

Disable PSK (uncheck
Enable PSK, but lock t
AFC at lower right cor
Lk button on lower rig

© 2013 Harry Bloomberg W3YJ 2

AFC
Control
SK signals
ring off freq
one of the following:
k AFC checkbox) or
transmit (click Lk button)
rner
ght below waterfall

26 March 2013 http://wpaares.org

PSK R modes vs M

PSK-500R is faster than
Why do we continue to

MT63 tolerates tuning
MT63 audio levels can
MT63 works well with
MT63-2000 audio offs
possible to change by a
MT63 is much more ro
We think best use of PS
VHF/UHF FM with flar

© 2013 Harry Bloomberg W3YJ 2

MT63

n MT63, PSK-250R as fast
use MT63?
errors
n vary widely
h acoustical coupling
set fixed at 1500 Hz, not
accident
obust and forgiving
SK R modes is on HF or on
rq

26 March 2013 http://wpaares.org

Data compression

Flmsg can compute a fil
encapsulate file with [w
Can also compress files!

© 2013 Harry Bloomberg W3YJ 2

n with Flmsg

le checksum and
wrap] identifiers.

!

26 March 2013 http://wpaares.org

Compressing files

© 2013 Harry Bloomberg W3YJ 2

s with Flmsg

26 March 2013 http://wpaares.org

Sending Spreadsh

Two choices in sending
Native format, usually E
Exported as Comma Sep
Try to send as CSV...it's
Transmit in Excel forma

Served Agency insists up
Spreadsheet contains for

When sending Excel, be
transmission time.

© 2013 Harry Bloomberg W3YJ 2

heets

spreadsheets.
Excel format or...
parated Value (CSV).
s much more efficient.
at only when

pon it.
rmula

e careful of file size and

26 March 2013 http://wpaares.org

Transfer Form in F

© 2013 Harry Bloomberg W3YJ 2

Flmsg

26 March 2013 http://wpaares.org

Transferring Binar

Use fastest mode that w
Don't time out the repea
Can be used to transfer a
Due to size, sending a u
impractical, even with v
Use only when necessar

© 2013 Harry Bloomberg W3YJ 2

ry Files

will work for conditions
ater!
any kind of file but...
useful image is still
very fast modes.
ry.

26 March 2013 http://wpaares.org

Advanced file tran

Fast Light Automatic Re
Allows reliable file trans
Two stations connect
Data is sent in blocks
An ack is sent after each
succesful receipt of bloc
Continues until file trans

© 2013 Harry Bloomberg W3YJ 2

nsfer with Flarq

eQuest (Flarq)
sfer with handshaking
h block to indicate
ck
sfer is complete

26 March 2013 http://wpaares.org

Using Flarq

Two stations establish a
Station A transmits a be
Station B responds to th
A and B establish a conn
Either station starts a fil
File transfer either conti
completion or fails
Another file can then be
broken

© 2013 Harry Bloomberg W3YJ 2

a connection
eacon
he beacon
nection
le transfer
inues successfully to
e transferred, or connection

26 March 2013 http://wpaares.org

Important paramet

Flarq breaks up files into
One block sent at a time
You can configure the s
Bigger blocksize allows
If there's a retry, entire l
retransmitted
Use large block size wit
Small block size with po
In general, use largest p
block size is a performa

© 2013 Harry Bloomberg W3YJ 2

ter: Block Size

o blocks
e between acks
size of a block
s faster file transfer but...
large block must be
th good conditions
oor conditions
possible block size, small
ance killer

26 March 2013 http://wpaares.org

Configuring Flarq

Go to Configure menu
Fill in My Call, Beacon
Change Block Size as ne

© 2013 Harry Bloomberg W3YJ 2

Text
eeded

26 March 2013 http://wpaares.org

Example of Flarq i

W3YJ initiates a beacon
W3YI responds to beaco
Stations establish conne
W3YJ send a file to W3
Two stations handshake

© 2013 Harry Bloomberg W3YJ 2

in use

n
on
ection
3YI
e until transfer is completed

26 March 2013 http://wpaares.org

Start Beacon - W3

© 2013 Harry Bloomberg W3YJ 2

3YJ

26 March 2013 http://wpaares.org

Respond to beaco

© 2013 Harry Bloomberg W3YJ 2

on - W3YI

26 March 2013 http://wpaares.org

Wait for connectio

© 2013 Harry Bloomberg W3YJ 2

on

26 March 2013 http://wpaares.org

Initiate file transfe

© 2013 Harry Bloomberg W3YJ 2

er – W3YJ sender

26 March 2013 http://wpaares.org

File Transfer – sen

© 2013 Harry Bloomberg W3YJ 2

nder viewpoint

26 March 2013 http://wpaares.org

File Transfer – rec

© 2013 Harry Bloomberg W3YJ 2

ceiver viewpoint

26 March 2013 http://wpaares.org

File Transfer comp

© 2013 Harry Bloomberg W3YJ 2

plete - sender

26 March 2013 http://wpaares.org

File Transfer comp

© 2013 Harry Bloomberg W3YJ 2

plete - receiver

26 March 2013 http://wpaares.org

Flarq guidelines -

Can transfer very long f
Possible to change trans
courtesy beeps on repea
Great for one-to-one file
Lots of flexibility with b
modes

© 2013 Harry Bloomberg W3YJ 2

pros

files
smit delay to allow
aters
e transfers
block sizes and different

26 March 2013 http://wpaares.org

Flarq tradeoffs - co

Must have hard-wired in
Cannot do broadcasts to
one transmissions
At least 30% performan
possible block size
With small block size, v
times
Much more complex tha
MT63 and Olivia do not
ARQ works poorly unde

© 2013 Harry Bloomberg W3YJ 2

ons

nterface
o many, can only do one-to-
nce penalty with largest
very long transmission
an flwrap
t work with flarq
er noisy conditions

26 March 2013 http://wpaares.org

Flarq recommenda

We think Flarq should b
transfers or binary files
Should be very rare for
Use PSK-125R, PSK-25
overcome performance i
Train extensively...more
Flwrap
Be prepared to change m

© 2013 Harry Bloomberg W3YJ 2

ations

be reserved for large file
us to send a binary file
50R, and PSK-500R to
issues
e difficult to learn than
modes and block sizes

26 March 2013 http://wpaares.org