PSK31 50 watts into a vertical, 28120 kHz, sending at 1200 Hz tone. Nothing heard on 435.350 or +/- 5 Khz.
Mark Lunday, WD4ELG Greensboro, NC FM06be [email protected] http://wd4elg.blogspot.com
If I remember correctly dont you not have to send PSK-31 tones for it to activate? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 12/11/2015 4:05 PM, Mark Lunday wrote:
PSK31 50 watts into a vertical, 28120 kHz, sending at 1200 Hz tone. Nothing heard on 435.350 or +/- 5 Khz.
Mark Lunday, WD4ELG Greensboro, NC FM06be [email protected] http://wd4elg.blogspot.com
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Yes, you need to send a PSK31 signal to turn on the NO-84 70cm downlink. The standard PSK31 idle signal should work, but an unmodulated carrier won't. There is a detector circuit that looks for a 31.25 HZ spectral component in the baseband uplink spectrum and that enables the transmitter:
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%...
I guess the design assumption is that your typical PSK31 message has enough 31Hz AM energy to trigger the detector, as two phase transitions (sequence 00 in Differential BPSK) is the "stop bit" between symbols.
Andy K0SM/2
On Dec 11, 2015, at 5:17 PM, Joe [email protected] wrote:
If I remember correctly dont you not have to send PSK-31 tones for it to activate? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com
On 12/11/2015 4:05 PM, Mark Lunday wrote: PSK31 50 watts into a vertical, 28120 kHz, sending at 1200 Hz tone. Nothing heard on 435.350 or +/- 5 Khz.
Mark Lunday, WD4ELG Greensboro, NC FM06be [email protected] http://wd4elg.blogspot.com
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Mark, et al
It sure is lonely when you are the only signal on the bird. My 80 watts uplink into crossed dipoles in attic most of the time will bring up the downlink. But I have noticed lots of flutter on the bird today and yesterday - from spin?
KC4LE and I have made daily contacts but I am not hearing others.
Is any one else trying to get setup beside Mark? Or are we all just busy?
Maybe we could post passes we plan to transmit on. For example, I will try to be on the 13:00Z and 19:40Z NO-84 passes across Virginia Sunday,the 13th.
Jerry, W6IHG
On 12/11/2015 10:05 PM, Mark Lunday wrote:
PSK31 50 watts into a vertical, 28120 kHz, sending at 1200 Hz tone. Nothing heard on 435.350 or +/- 5 Khz.
Mark Lunday, WD4ELG Greensboro, NC FM06be [email protected] http://wd4elg.blogspot.com
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
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Andrew Flowers -
Jerry Pixton -
Joe -
Mark Lunday