I might be interesting to repeat the Tune power test with the Drive set
to 50 instead of 100..
( Different PA linearity curves on different bands ??? )
AL, K0VM
On 1/9/2012 12:00 PM, flexradio-requ...@flex-radio.biz wrote:
Date: Mon, 9 Jan 2012 07:23:12 -0800 (PST)
From: Ed Wilson<ed.wil...@ymail.com>
To:"flexradio@flex-radio.biz" <flexradio@flex-radio.biz>
Subject: [Flexradio] Flex-5000 Power Output
Message-ID:
<1326122592.59107.yahoomail...@web162205.mail.bf1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Colleagues,
I took some measurements on my Flex-5000A this morning using a dummy load. The
measurements are as follows:
Band??? ??? Tune Power (CWU)??? VSWR??? ??? RTTY (-1 dB, DIGU)??? ??? PSK-31
(-1dB, DIGU)
160??????????? 100??? ??? ??? ??? ??? ??? 1.6??? ??? ??? ??? ??? 44??? ??? ???
??? ??? ??? ??? ??? 51
80??????????????? 98??? ??? ??? ??? ??? ??? 1.4??? ??? ??? ??? ??? 47??? ???
??? ??? ??? ??? ??? ??? 56
40??????????????? 93??????????????????? ??? 1.3??? ??? ??? ??? ??? 44??? ???
??? ??? ??? ??? ??? ??? 51
30??????????????? 96??????????????????? ??? 1.2??? ??? ??? ??? ??? 50??? ???
??? ??? ??? ??? ??? ??? 45
20??????????????? 95??????????????????? ??? 1.2??? ??? ??? ??? ??? 60??? ???
??? ??? ??? ??? ??? ??? 68
17??????????????? 96??????????????????? ??? 1.1??? ??? ??? ??? ??? 55??? ???
??? ??? ??? ??? ??? ??? 61
15??????????????? 100????????????????? ??? 1.1??? ??? ??? ??? ??? 75??? ??? ???
??? ??? ??? ??? ??? 77
12??????????????? 93??????????????????? ??? 1.2??? ??? ??? ??? ??? 81??? ???
??? ??? ??? ??? ??? ??? 79
10??????????????? 101????????????????? ??? 1.2??? ??? ??? ??? ??? 87??? ??? ???
??? ??? ??? ??? ??? 89
6????????????????? 89??????????????????? ??? 1.4??????????????? ???
60???????????????????????????????68
I generated the RTTY and PSK-31 signals with DM-780 v 5.0 and adjusted for an
ALC value of -1 dB. My question is why does my power output almost double from
the lower bands to the upper bands (except for 6 meters) when using the digital
modes and conversely why are the power outputs lower on the lower frequency
bands while the tune power remains fairly constant? I am using PowerSDR 2.2.3
and VAC.
I apologize in advance if the formatting does not reproduce well on your
browser. I used tabs, but it appears that they just translate to spaces.
Ed, K0KC
_______________________________________________
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
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/
