Do you have API available for D4000?
As of July 2020, we only have SCPI available for D4000. We are planning to provide Python API support for D4000 in the near future.  Users can alway...
Fri, Jul 10, 2020 at 6:12 PM
What are the pre-select filers for D4000?
There are 8 pre-select filters in total. they are: Filter 1: 38 - 41 GHz Filter 2: 36 - 39 GHz Filter 3: 34- 37 GHz Filter 4: 32 - 35 GHz Filt...
Fri, Sep 18, 2020 at 12:29 PM
What does CTRL port do on the D4000?
That's for connecting it to other future external modules and have an external unit to control it.  
Thu, Jul 2, 2020 at 2:58 PM
What is the front-end attenuation range on the D4000?
The front-end attenuator or user control attenuator range is from 0 dB to 31.5 dB with 0.5 dB step size. 
Fri, Sep 18, 2020 at 12:35 PM
Is IF output from ThinkRF D4000 spectrum inverted?
No. The IF OUT of D4000 has always spectrum non-inverted. 
Thu, Dec 10, 2020 at 4:58 PM
Does D400 support IP address autodetect?
The default IP setting for D4000 is on the Static IP address. It can be switched to a Dynamic IP address however D4000's firmware doesn't support de...
Tue, Sep 14, 2021 at 10:53 AM
Why is the D4000 slow to tune at certain frequencies?
This is due to a known issue where a PLL within the downconverter takes about 20 ms to change bands. Due to the frequency plan used in the unit, this occurs...
Fri, Feb 4, 2022 at 4:28 PM
thinkRF D4000 Demo video
Tue, Jan 10, 2023 at 4:08 PM
How coupling works in the D4000?
The input of the D4000 is AC couples only and it can not be configured.  The coupling SCPI command is for querying only.
Tue, Jan 10, 2023 at 4:14 PM