Table of Contents
FlexRadio Flex-6xxx
A series of high-performance 100W HF/6m SDR transceivers. Driven using SmartSDR software or the Maestro standalone control head (actually a Windows tablet in a box).
Models
| Model | Current | SCUs | Max rcvrs | Max b/w | ATU | RX-only inputs | Diversity RX | Integrated display | 2m |
| 6300 | no | 1 | 2 | 7 MHz | optional | 1 | no | no | no |
| 6500 | no | 1 | 4 | 14 MHz | optional | 2 | no | no | no |
| 6400 | yes | 1 | 2 | 7 MHz | optional | 2 | no | no | no |
| 6400M | yes | 1 | 2 | 7 MHz | optional | 2 | no | yes | no |
| 6600 | yes | 2 | 4 | 14 MHz | yes | 4 | yes | no | no |
| 6600M | yes | 2 | 4 | 14 MHz | yes | 4 | yes | yes | no |
| 6700 | no | 2 | 8 | 14 MHz | yes | 3 | yes | no | yes |
An SCU is a Spectral Capture Unit.
The 6300, 6400(M), and 6500 have 1 Spectral capture unit that sample the entire HF spectrum from 30Khz to 54Mhz all the time.
You can use 2 slices or receivers on a single SCU radio on any part of the HF spectrum you wish. The only limitation is that you have to use the same antenna to do that.
If you have a 160M to 6M multiband antenna, you can receive 160M and 6M at that same time.
If you go to a 2 SCU radio then you can use 2 different antennas at the same time. They are independent of each other.
Resources
http://nn4zz.com/FLEX6700.htm - some hints and general unstructured information
https://k9dur.us/smartsdr_utilities.php - SmartSDR Utilities