[Elecraft] Planning the next filters

[Joe Subich, W4TV]

> Probably the biggest problem with the Signalink USB is not the 
> interface itself, but the Windows builtin drivers for the ADC. It 
> thinks the ADC is a microphone and add +30 dB of gain in software.
That issue is not with Windows ... it is with the device maker who
has selected a device that identifies as microphone level.  Using
the proper device/device ID will cause Windows to see it as a line
level input and set the drivers correctly.

73,

    ... Joe, W4TV


On 3/9/2018 10:05 AM, Johan Ymerson wrote:
> Yes, the Signalink USB is 16-bit from what I remember. But on the other hand
> alost all rigs have a 16-bit audio DAC so that will be the limiting factor
> anyway (with K3 being the exception with a 24-bit DAC).
>   
> Probably the biggest problem with the Signalink USB is not the interface
> itself, but the Windows builtin drivers for the ADC. It thinks the ADC is a
> microphone and add +30 dB of gain in software. So those 16 bit's are quickly
> reduced to 6 bits if you are not careful. There are some descriptions (it
> isn't obvious, it is not visible in the normal mixer controls) on the net how
> to set the gain to (almost) 0 dB, but I use Linux so I haven't tried.
> 
> /Johan
> 
> On Friday, 9 March 2018 15:18:09 CET Raymond Sills wrote:
>> And.... isn't it the case that the SignaLink is a 16 bit device?  That
>> Tascam US 100 is also 16 bits, but it has been replaced by a model that has
>> 24 bit/96 KHz sampling.. indicating a high quality interface.
>>
>> 73 de Ray
>> K2ULR
>> KX3 #211
>>
>>
>>
>> -----Original Message-----
>> From: Jim Brown <jim at audiosystemsgroup.com>
>> To: elecraft <elecraft at mailman.qth.net>
>> Sent: Fri, Mar 9, 2018 1:41 am
>> Subject: Re: [Elecraft] Planning the next filters
>>
>> On 3/8/2018 10:18 PM, Bill Frantz wrote:
>>> This problem occurred with a SignaLink.
>>
>> That's not a very good interface. It helps to have an clip light or
>> other digital level indicator on the interface for the received signal.
>> My Tascam US100 has a green signal presence light and a red one for
>> clip, which makes it easy to stay out of trouble.
>>
>> 73, Jim K9YC
>>
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> 
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