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  #41 (permalink)  
Old 06-29-2018, 1:34 PM
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New release firmware is out for the SDS100.
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Old 07-02-2018, 9:40 AM
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Moved the radio to a spot on my desk where reception for the NC VIPER sites was improved - still only seeing about -105 dBm.... Then, decided to plug it in before the battery dies.... immediately get the LOW USB BUS VOLTAGE error ... I just can't seem to win with this thing.

Switched from a hub to a direct laptop port (same cable) - so far, so good on power but since "touching" the radio (while trying to maintain position), reception dropped off again.... even back onto battery power.... very finicky.

EDIT: after listening a bit on battery, I carefully plugged in the USB cable (without moving the radio) - lost reception again. Noise values in the 5 digits range... remove the USB cable from the radio - noise values in 3 digit and reception returns.
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Old 07-02-2018, 10:21 AM
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sounds like you've got a noisy USB power source
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Old 07-02-2018, 10:26 AM
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Quote:
Originally Posted by troymail View Post
Moved the radio to a spot on my desk where reception for the NC VIPER sites was improved - still only seeing about -105 dBm.... Then, decided to plug it in before the battery dies.... immediately get the LOW USB BUS VOLTAGE error ... I just can't seem to win with this thing.

Switched from a hub to a direct laptop port (same cable) - so far, so good on power but since "touching" the radio (while trying to maintain position), reception dropped off again.... even back onto battery power.... very finicky.

EDIT: after listening a bit on battery, I carefully plugged in the USB cable (without moving the radio) - lost reception again. Noise values in the 5 digits range... remove the USB cable from the radio - noise values in 3 digit and reception returns.
Your "hub" probably can't supply the necessary current and I agree on the noisy power source.
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Old 07-02-2018, 10:33 AM
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EDIT: after listening a bit on battery, I carefully plugged in the USB cable (without moving the radio) - lost reception again. Noise values in the 5 digits range... remove the USB cable from the radio - noise values in 3 digit and reception returns.
Your USB hub and laptop can't handle the current required, and are generating enough RFI to make you lose signal. RFI increases when you overload a switching power supply.

Try an AC extension cord, and the factory USB adapter and cable.
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Old 07-03-2018, 7:53 AM
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Doing some testing with the SDS-100 connected to the same outdoor antenna my 536 is usually connected to ...

The 536 - using that same antenna - does pretty well receiving VIPER.....

The SDS-100 - not so much... seeing lots of initially clipped transmissions and at times, hearing transmissions on other radios, the SDS is silent (occasionally showing it stopped on the talkgroup but with no audio - even during longer transmissions).
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