apache-labs.com

Hello,

I used an Orion MK2 board for some time.

A nice evolution of apache labs.

I found two bugs on my board and a 7000DLE at the moment.
First: 384000Khz sampling rate with activated PD results in unclean spectrum and audio

Second:
RF power meter without Alex shows a maximum of 760mW, while at the output of U4 (FWD Power OPA) is about 3V to measure, so the OPA is overdriven. To solve the problem, I have replaced my Orion MK2 R16 (original 1k as Hermes) against a 2.2k resistor, which gives roughly a division factor of 4, now are 2W RF out according to the display around 500mW

best regards René

The 384KHz issue is not a bug. At 384KHz there is generally insufficient bandwidth on a 100Mbit/s Ethernet connection to run PureSignal. That is also why stitched receivers cannot be used with PureSignal.

This limitation will be removed when Protocol 2 firmware is release. Since that runs on Gigabit Ethernet (only--the radio PHY will be fixed at GiGe speed), as long as you have a GigE connection all the way to your PC you will be able to run any bandwidth available with or without PureSignal.

It should be mentioned that currently PureSignal is optimized for 192KHz. While it will work at other sample rates under Protocol 2, its performance is diminished somewhat, but still very respectable.

73,

Scott

Hello Scott,

With Hermes the 384khz problem does not exist.
Unfortunately, Thetis is still early beta.

Best regards René

dj1yr wrote:Hello Scott,

With Hermes the 384khz problem does not exist.

With PureSignal activated?

Hello,

yes, of course, with activated PureSignal.


regards René

Hello René,

having problems with poor IMD (gain nonlinearity) on two bands (7000DLE) I would like to ask whether you are able to get full power after your mod.

HW?

TNX

Volker

DL4ZBG