Hi John
Followed your instructions! Heard a tone regardless if "Enable TX
Image
etc," was pressed or not. It was about 2 kHz below the marked (14.200)
frequency.
Note: no power is indicated in the external power meter ( I get .33
watts
when hitting the "TUN" button).
Switching to LSB (14.200). Nothing is heard or seen on the S meter.
Tuning to 2KHZ down, it is S9+10. Again no change with "EnTxImTo" in or out!
Also no change when exercising the Amplitude and Phase controls.
Tried using the "TUN". Looked for the signal on LSB, virtually NADA
ditto
22kHZ below.
When using the MOX the panadapter shows the typical (for me) pedestal
determined by my xmit pass band selection. No change in the display when
pressing or releasing the "Enable TX Image" control. Looks like, based on
this and the external receiver reaction, is that no signal is being produced.
Where should the image appear when using the "TUN" control?
Working condx:
RunningXP at 1.4 GigHz & PowerSDR SVN838. Sound card D-44 with SDR1K with
PA. Signal taken from the PA output to a Tribander.
External Rcvr is: Yeasu MK-V with 5kHz roofing filter looking into a
dummy load.
Help!! de Jerry
At 02:06 PM 1/25/2007 -0600, you wrote:
>Jerry, here's how you can do an transmit image calibration if you have
>another receiver
>
>Set your transmitter to 14200 in USB
>
>Go to Transmit Rejection panel
>
>Activate Enable TX Image tone
>
>Set Drive power to 1
>
>Click MOX -you should hear a tone in your second receiver
>
>Place second receiver in FAST AGC mode
>
>Note the signal strength of signal on the S-meter
>
>Switch your second receiver to LSB
>
>Note the signal strength
>
>Move the Phase and Gain sliders very slowly until you find the point where
>the signal decreases. Do this several times alternating between Phase and
>Gain.
>
>Once you get the lowest signal with the sliders, do the same with the
>up/down buttons to get even better suppression.
>
>You should get 30dB or more of rejection.
>
>Good luck.
>
>John P. Basilotto
>W5GI
>Marketing and Product Manager
>FlexRadio Systems
>Office 512-535-5266
>Mobile 512-608-6727
>
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Jerry
>Sent: Thursday, January 25, 2007 1:12 PM
>To: FlexRadio@flex-radio.biz
>Subject: Re: [Flexradio] New File Download Capabilities added to the Web
>Page
>
>Hi All
>
> Well I still cant find out "How to adjust the transmit image
>rejection".
>Read the manual, scanned above and below the "TUN" frequency etc. I can
>hear lots of birdies but none change amplitude with the image rejection
>sliders.
>
> The manual is unclear as to where to listen for the image produced
>by
>PowerSDR and the SDR-1000. Been scratching my head for months with this
>subject. I run power during RTTY contests and worry that my image is QRMing
>stations, or worse they are trying to answer my image and not me!
>
> So, since I can not find the answer in the documentation, where is
>the
>image (Frequency) when I am in the Digl/CW low mode? Second what happens
>when one "Enables TX Image Tone"? Should one use the LSB/USB mode. If so
>is the signal path different from DIGL or CW thus requiring different
>adjustment?
>
> yours in confusion Jerry NO2T
>
>
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>
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>
>
>
>--
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4:46 PM
>
>
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