Re: VARA HF Modem Speeds


Graham
 

Rick 

I , just noticed the  P4  and V4 speeds , had , in effect  reversed, where as the  other  modes , look to be similar ,

interesting  would be  comparison of  OLIVIA  and  ROS-HF-4  modes 

P4 is  used on HF out side the  part97  regulatory area , various on air comparisons  , have been  made , one  ive posted below 
Test via HB9AVK
   592 km  7.050  , shows a  11:7   compound advantage , test '2' shows  P4  advantage , 10 seconds in  120 
link survival, V4  appears also to offer advantage ?

In the  simulation, the  audio is presented  directly ? ,  Vara has been  developed  using live  links, 
notably , recent versions are  bandwidth  tailored to maximise  use of available bandwidth , peak ratios also have been  
dynamically matched .. all these contribute to  optimisation 


73 -Graham
g0nbd




COMPARE VARA and PACTOR4  upload via Gateway HB9AK

 

Test via HB9AVK   592 km  7,050 MHz DIAL

 

 

Term 1

 

*** Completed send of VARA message JE2O4B0QBRP2

*** Sent 1 message.  Bytes: 20230,  Time: 01:03,  bytes/minute: 19030

 

*** Completed send of Pactor message MATG09PBPW98

*** Sent 1 message.  Bytes: 20218,  Time: 03:11,  bytes/minute: 6332

 

Term 2

 

*** Completed send of VARA message 6Z4SZQFPRIJL

*** Sent 1 message.  Bytes: 20213,  Time: 02:16,  bytes/minute: 8870

 

*** Completed send of Pactor message 2XWY9G2MCS0N

*** Sent 1 message.  Bytes: 20219,  Time: 02:07,  bytes/minute: 9517

 

Term 3

 

*** Completed send of VARA message TC67GB6RLZ1S

*** Sent 1 message.  Bytes: 20213,  Time: 02:46,  bytes/minute: 7301

 

*** Completed send of Pactor message Z6PSHUFB8HZ3

*** Sent 1 message.  Bytes: 20217,  Time: 02:21,  bytes/minute: 8573

 

Term 4

 

*** Completed send of VARA message K9K11XBW9D3F Vara WL2K

*** Sent 1 message.  Bytes: 20215,  Time: 02:37,  bytes/minute: 7692

 

*** Completed send of Pactor message 58KVLSL4OUSX    fast QRM Disconnecting Timeout

*** Sent 1 message.  Bytes: 20219,  Time: 05:24,  bytes/minute: 3740

 

Result:

 

Term

MODE

Total bytes sent

Time

bytes/minute

Message ID

 

1

VARA

20230

01:03

19030

JE2O4B0QBRP2

 

 

P4

20218

03:11

6332

MATG09PBPW98

 

 

 

 

 

 

 

 

2

VARA

20213

02:16

8870

6Z4SZQFPRIJL

 

 

P4

20219

02:07

9517

2XWY9G2MCS0N

 

 

 

 

 

 

 

 

3

VARA

20213

02:46

7301

Z6PSHUFB8HZ3

 

 

P4

20217

02:21

8573

 

 

 

 

 

 

 

 

 

4

VARA

20215

02:37

7692

K9K11XBW9D3F

 

 

P4

20219

05:24

3740

58KVLSL4OUSX

 

 

 

 

 

 

 

 

 

 

 

 

VARA Mean Value:  10723

P4 Mean Value:       7040

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