Welcome, Guest
Username: Password: Remember me
*****PLEASE, CHECK ALL PREVIOUS TOPICS, BEFORE CREATING A NEW ONE! DUPLICATED TOPICS WILL BE DELETED!*****

TOPIC: sunsdr2 pro, intermodulation on 15 m

sunsdr2 pro, intermodulation on 15 m 17 Jan 2022 16:04 #1

  • SM2UHF
  • SM2UHF's Avatar
  • OFFLINE
  • Posts: 11
  • Thank you received: 1
Hi

I have an SUNSDR2 PRO and this unit have started to develop strange behavior, on 15 m, only 15 m, the signals get distorted and the noise floor rise like 30-40 db then you apply a signal, tested with SSG at -80 dbm same thing, on all other bands it is clean.
Attachments:
The administrator has disabled public write access.

sunsdr2 pro, intermodulation on 15 m 18 Jan 2022 07:16 #2

  • HB9JND
  • HB9JND's Avatar
  • OFFLINE
  • Posts: 27
  • Thank you received: 12
Try again, but with NB off.

vy 73, Hubert
The administrator has disabled public write access.

sunsdr2 pro, intermodulation on 15 m 18 Jan 2022 10:56 #3

  • SM2UHF
  • SM2UHF's Avatar
  • OFFLINE
  • Posts: 11
  • Thank you received: 1
same thing, also done total reset and same thing

73
Lars
The administrator has disabled public write access.

sunsdr2 pro, intermodulation on 15 m 18 Jan 2022 11:33 #4

  • HB9JND
  • HB9JND's Avatar
  • OFFLINE
  • Posts: 27
  • Thank you received: 12
Lars,

does it make a difference if the bandpass filter is on or off?

73, Hubert
The administrator has disabled public write access.

sunsdr2 pro, intermodulation on 15 m 18 Jan 2022 12:00 #5

  • SM2UHF
  • SM2UHF's Avatar
  • OFFLINE
  • Posts: 11
  • Thank you received: 1
Hi

no :( I have try everything same thing on only 15 m, also you can hear the FT8 signals gets distorted and if i inject a CW carrier and listen in CW or SSB mode it is also distorted in the beat tone and only on 15 m

73
LArs
The administrator has disabled public write access.

sunsdr2 pro, intermodulation on 15 m 18 Jan 2022 17:08 #6

  • iw7dmh
  • iw7dmh's Avatar
  • OFFLINE
  • Posts: 250
  • Thank you received: 116
Did you checked the "Use wide RX filter". If it is try to uncheck it.

73' iw7dmh
The administrator has disabled public write access.
Time to create page: 0.083 seconds