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6600 XVRT drive level
Marc Lalonde
Member ✭✭
put radio on test since i unpack it for make sure all is ok before put on remote site
have try very hard to find flay but ,so far only 2 point
but i found that 2 point
1-) XVRT drive level is not as specified ,set it for +15dbm and radio output +11.2dbm
test is done @ 28.2Mhz this may a doc issue ??
2-) 6m IMD , not want to put number here but seem very variable whit different drive level.
full power is good but around 50% is not so good ,please note that test is make @12.0V
but i agree that "ALL HF" radio barely make IMD limit on 50Mhz ..
i take the opportunity of the -20 Celsius outdoor temp to test the 6600 in the cold ,it worked flawless ;-) , but sill put it on heated box for run it on specification temp range
good job on birdie to i found only 3 strong one ~24,57Mhz and 2 other bellow 160m
absolute noting from 28.0 to 28.5 were all transverter work is usually done ;-)
Marc L.
have try very hard to find flay but ,so far only 2 point
but i found that 2 point
1-) XVRT drive level is not as specified ,set it for +15dbm and radio output +11.2dbm
test is done @ 28.2Mhz this may a doc issue ??
2-) 6m IMD , not want to put number here but seem very variable whit different drive level.
full power is good but around 50% is not so good ,please note that test is make @12.0V
but i agree that "ALL HF" radio barely make IMD limit on 50Mhz ..
i take the opportunity of the -20 Celsius outdoor temp to test the 6600 in the cold ,it worked flawless ;-) , but sill put it on heated box for run it on specification temp range
good job on birdie to i found only 3 strong one ~24,57Mhz and 2 other bellow 160m
absolute noting from 28.0 to 28.5 were all transverter work is usually done ;-)
Marc L.
0
Comments
-
Marc,
We worked on the transverter output levels on the Alpha team and thought we had them solved. I'll check and if it's still a bug I'll submit a bug report.
The radio is recommended to run at 13.8 VDC and if you run it at 14.5 VDC you will have even less IMD. I've checked with the Flex engineers and you'll do zero harm to your radio at 14.5 VDC.
73,
Mack
W4AX
Alpha Team0 -
Hi Mack
i redo the XVRT level test @13.8V and still +11.2dbm ,for now i re-calibrate my amp for match +11.2db
as for IMD ,13.8V hep for sure , will see if i have time to redo test
0 -
Marc,
The 6400/6600 Hardware Reference on page 14 shows a maximum XVTR power of +10 dBm while page 36 mention a maximum of up to +15 dBm. My 6600 produces 10.9 dBm maximum at 28.2 MHz. On 40M the output is about 13.4 dBm. On 160M it's 15.0 dBm. And, on 630M it's 14.8 dBm. A last check on 50.125 shows 10.1 dBm. So, it appears the XVTR output is higher on the lower frequencies but always at 10 dBm and above at 6M and below.
Hope this comparison helps!
---
Chuck, AE4CW
0 -
ok but on setup on XVRT page it "allow" to put it to +15dbm ;-)
but normally the XVRT is leveled ans stable over frequency !
i wait for a updated hardware manual that cover the 6600 / 64000
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