[hpsdr] Further Information: Help Needed: PowerSDR TX FrequencyInaccuracy

[Tokio Endo]

Hi All,

It's very strange. Even with Penny and Metis, when I transmit 3.530 000, the
TX frequency is 3.529 9989, 1.1Hz down from the displayed frequency.
In other frequency the measured one may be correct in the transmission.
In the firmware of Penny there might be some error, or frequency data to
Penny.
It is very very fundamental issue.
Is there any comments on that?

73
Tokio Endo
JA1CCA

  -----Original Message-----
  From: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org]On Behalf Of Tokio Endo
  Sent: Saturday, January 12, 2013 10:49 AM
  To: hpsdr at lists.openhpsdr.org
  Subject: [hpsdr] Further Information: Help Needed: PowerSDR TX
FrequencyInaccuracy


  Hi All,

  I changed the board: from Hermes to Penny, Mercury, Metis, and OCXO
  I measured TX frequency of PowerSDR in the same manner as the case of
Hermes.
  The measured transmitted frequency is correct, 3.559 9999: the difference
is 0.1Hz.

  Penny V1.7, Metis V2.3, Mercury 3.3, 10MHz Clock is Atlas bus, 122.88Mhz
from Mercury.
  PowerSDR is V2.2(11/24/12), firmware check bypassed.

  Therefore the problem might be Hermes for my case.
  It is very much appreciated If someone can measure the transmitted
frequency of Hermes, and let us know the result.

  73
  Tokio Endo
  JA1CCA

    -----Original Message-----
    From: Tokio Endo [mailto:rfcgf600 at ybb.ne.jp]
    Sent: Saturday, January 12, 2013 9:31 AM
    To: Tokio Endo; hpsdr at lists.openhpsdr.org
    Subject: RE: [hpsdr] Help Needed: PowerSDR TX Frequency Inaccuracy


    Hi All,

    I mistyped.
    Frequncy set to 3.560 000 in CW on the display, not 3.650 000.

    Tokio

      -----Original Message-----
      From: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org]On Behalf Of Tokio Endo
      Sent: Saturday, January 12, 2013 9:20 AM
      To: hpsdr at lists.openhpsdr.org
      Subject: [hpsdr] Help Needed: PowerSDR TX Frequency Inaccuracy


      Hi All,

      I measured TX frequncy of PowerSDR.
      Frequency set to 3.650 000 in CW on the display.
      However the measured frequency in transmission is 3.559 9715.
      About 28 Hz down. Receiving is quite normal, e.g. in the reception of
strong AM broadcasting station by tuning in the excat frequncy display, LSB
or USB is the same sound. If there is a 28Hz difference we can easily
identify the frequency difference listening music in LSB or USB.

      The above is the result of newlly installed PowerSDR V2.2 (11/24/12).
The board is Hermes V2.1. External 10MHz OCXO is used, its accuracy is
confimred after the above measurement.

      The infomration about the above is very much appreciated. So far I've
transmitted in the wrong frequncy.

      73
      Tokio Endo
      JA1CCA
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