John,
Did you notice that your Preamp goes from 0 on 2 meters to +20 on 10 meters?
Does that make a difference?
Jim KJ2P
-----Original Message-----
From: Maetta, John
Sent: Thursday, March 03, 2011 11:37 AM
To: [email protected]
Subject: [Flexradio] Flex-1500 HF IF vs XVTR IF Noise Level
Gentlemen,
After extensive playing with 2.0.19RC1 using my Flex-1500 and DEMI 144-28
tranverter, I noted an anomaly. The tranverter uses 28MHz as an IF source,
which is very common.
It appears the noise floor raises 20dBm when switching from the HF band
28MHz to the PSDR XVTR in the VHF 2 setup.
If we are still using the same 28MHz band and just 'fooling' the operator by
displaying the 2 meter XVTR frequencies offsets on PSDR, then why is the
noise floor higher?
See the video below. It will show you what I am experiencing. Both the HF
28Mhz and XVTR setups are using the same antenna, the XVRX and XVTX/COM.
No tranverter is connected during this test and 50 loads are installed on
all Flex-1500 antenna jacks.
http://www.n6vmo.com/Flex-1500/XVTR_vs_HF_Noise_Level.avi
73
John
N6VMO
This message is intended only for the use of the intended recipient. If you
are not an intended recipient, you are hereby notified that any use,
dissemination, disclosure or copying of this communication is strictly
prohibited. If you have received this communication in error please destroy
all copies of this message and its attachments and notify the sender
immediately.
_______________________________________________
FlexRadio Systems Mailing List
[email protected]
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flexradio.com/ Homepage:
http://www.flexradio.com/
_______________________________________________
FlexRadio Systems Mailing List
[email protected]
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
