Date
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Hermes Board temperature
sm6fhz
Hi.
It seems that the Hermes Board is sensitive to heat and requires some kind of cooling. I am presently working on a solution.
Is there a way to read the temperature on the Hermes Board via SDR-Console?
I saw in another thread that it was possible to read the temperature from the Hermes Lite via SDRC, so I thought it might be possible on the Hermes Board as well.
I have been searching in the menus of SDRC with the Hermes Board running but nothing found.
Any information on this ?
73 / Ingolf, SM6FHZ
It seems that the Hermes Board is sensitive to heat and requires some kind of cooling. I am presently working on a solution.
Is there a way to read the temperature on the Hermes Board via SDR-Console?
I saw in another thread that it was possible to read the temperature from the Hermes Lite via SDRC, so I thought it might be possible on the Hermes Board as well.
I have been searching in the menus of SDRC with the Hermes Board running but nothing found.
Any information on this ?
73 / Ingolf, SM6FHZ
So,
- Put heatsinks on the FPGA and ADC and DAC.
- Add a small fan.
- Don't remember about the temperature - show me a screenshot with the Receiver DSP's Radio panel visible.
- Hermes Lite and Hermes are two very different beasts.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of sm6fhz via groups.io <ingolf.fhz@...>
Sent: 04 January 2023 13:00
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: [SDR-Radio] Hermes Board temperature
Sent: 04 January 2023 13:00
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: [SDR-Radio] Hermes Board temperature
Hi.
It seems that the Hermes Board is sensitive to heat and requires some kind of cooling. I am presently working on a solution.
Is there a way to read the temperature on the Hermes Board via SDR-Console?
I saw in another thread that it was possible to read the temperature from the Hermes Lite via SDRC, so I thought it might be possible on the Hermes Board as well.
I have been searching in the menus of SDRC with the Hermes Board running but nothing found.
Any information on this ?
73 / Ingolf, SM6FHZ
It seems that the Hermes Board is sensitive to heat and requires some kind of cooling. I am presently working on a solution.
Is there a way to read the temperature on the Hermes Board via SDR-Console?
I saw in another thread that it was possible to read the temperature from the Hermes Lite via SDRC, so I thought it might be possible on the Hermes Board as well.
I have been searching in the menus of SDRC with the Hermes Board running but nothing found.
Any information on this ?
73 / Ingolf, SM6FHZ
--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
sm6fhz
QSL Simon.
I have put heatsinks on the FPGA and the Ethernet interface IC. Have not yet got that far as I have on the ADC / DAC as well.
I have a small (40x40mm) 12 V fan running at ~6V atm. Will optimize the voltage for cooling vs. fan noise.
What I have seen is that the Ethernet communication halts / stops when it's getting too warm. Worse on 1536 kHz and 768 kHz BW compared to lower BW's.
Cooling helps there. With good cooling it is stable at 1536 kHz BW.
I enclose a screenshot including the DSP-panel for possible temperature readings.
There is a possibility to define the status of 7 pins as function of frequency in the "Radio configuration" window. Do they refer to the "User Open-Collector Output" pins 1 to 7 of J16?
See attached screenshot.
BTW how are you progressing with your Hermes board?
73 / Ingolf, SM6FHZ
I have put heatsinks on the FPGA and the Ethernet interface IC. Have not yet got that far as I have on the ADC / DAC as well.
I have a small (40x40mm) 12 V fan running at ~6V atm. Will optimize the voltage for cooling vs. fan noise.
What I have seen is that the Ethernet communication halts / stops when it's getting too warm. Worse on 1536 kHz and 768 kHz BW compared to lower BW's.
Cooling helps there. With good cooling it is stable at 1536 kHz BW.
I enclose a screenshot including the DSP-panel for possible temperature readings.
There is a possibility to define the status of 7 pins as function of frequency in the "Radio configuration" window. Do they refer to the "User Open-Collector Output" pins 1 to 7 of J16?
See attached screenshot.
BTW how are you progressing with your Hermes board?
73 / Ingolf, SM6FHZ
Siegfried Jackstien
if you add a blower you maybe should stick an ISOLATION CAP OVER THE CLOCK ... tcxo (and other clocks) do not like airflow
just thinking (i found similar things when modding pluto)
dg9bfc sigi
Am 04.01.2023 um 14:46 schrieb Simon
Brown:
So,
- Put heatsinks on the FPGA and ADC and DAC.
- Add a small fan.
- Don't remember about the temperature - show me a screenshot with the Receiver DSP's Radio panel visible.
- Hermes Lite and Hermes are two very different beasts.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of sm6fhz via groups.io <ingolf.fhz@...>
Sent: 04 January 2023 13:00
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: [SDR-Radio] Hermes Board temperatureHi.
It seems that the Hermes Board is sensitive to heat and requires some kind of cooling. I am presently working on a solution.
Is there a way to read the temperature on the Hermes Board via SDR-Console?
I saw in another thread that it was possible to read the temperature from the Hermes Lite via SDRC, so I thought it might be possible on the Hermes Board as well.
I have been searching in the menus of SDRC with the Hermes Board running but nothing found.
Any information on this ?
73 / Ingolf, SM6FHZ
--
- + - + -Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
sm6fhz
Hi.
Looking at the data sheets for the ADC (LTC2208-14) the dissipated power is specified to 1.32 W.
Clearly a heatsink would be beneficial there.
I suppose that the LTC2208-14 samples the full band (up to 55 MHz) regardless of the displayed BW (.....384, 768, 1536 kHz)
The datasheet for the Tx-DAC (AD9744ARU) specifies a dissipated power of 0.135 W.
I am not sure if a heatsink would do much difference.
73 / Ingolf, SM6FHZ
Looking at the data sheets for the ADC (LTC2208-14) the dissipated power is specified to 1.32 W.
Clearly a heatsink would be beneficial there.
I suppose that the LTC2208-14 samples the full band (up to 55 MHz) regardless of the displayed BW (.....384, 768, 1536 kHz)
The datasheet for the Tx-DAC (AD9744ARU) specifies a dissipated power of 0.135 W.
I am not sure if a heatsink would do much difference.
73 / Ingolf, SM6FHZ
Just put heatsinks everywhere and make sure there's a decent airflow.
I'll get on with mine in a couple of weeks I hope.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of sm6fhz via groups.io <ingolf.fhz@...>
Sent: 05 January 2023 15:44
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Hermes Board temperature
Sent: 05 January 2023 15:44
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Hermes Board temperature
Hi.
Looking at the data sheets for the ADC (LTC2208-14) the dissipated power is specified to 1.32 W.
Clearly a heatsink would be beneficial there.
I suppose that the LTC2208-14 samples the full band (up to 55 MHz) regardless of the displayed BW (.....384, 768, 1536 kHz)
The datasheet for the Tx-DAC (AD9744ARU) specifies a dissipated power of 0.135 W.
I am not sure if a heatsink would do much difference.
73 / Ingolf, SM6FHZ
Looking at the data sheets for the ADC (LTC2208-14) the dissipated power is specified to 1.32 W.
Clearly a heatsink would be beneficial there.
I suppose that the LTC2208-14 samples the full band (up to 55 MHz) regardless of the displayed BW (.....384, 768, 1536 kHz)
The datasheet for the Tx-DAC (AD9744ARU) specifies a dissipated power of 0.135 W.
I am not sure if a heatsink would do much difference.
73 / Ingolf, SM6FHZ
--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.
Siegfried Jackstien
add an isolation cap over the main clock ... they do not like airflow
a pluto user with a blower pushing air in his pluto had some "wobbling" in his audio
for a test he switched off the blower >> crystal clear audio
switched back on >> wobbling
after he added the isolation cap over the tcxo the wobbling was gone
you could "hear" each blob of air (each blade from the blower) ..
also mechanical stuff (vibrations) has to be taken care off if you add a blower
i do not own a hermes but tell you my findings around tcxo and how to use them (there is a reason why tcxo manufacturers sell isolation caps)
if you can do passive cooling (no blower) it is a bit better .. added thermal mass helps a lot to lower drift and to suck away the heat from the chips
(just thinking)
greetz sigi dg9bfc
Am 05.01.2023 um 18:02 schrieb Simon
Brown:
Just put heatsinks everywhere and make sure there's a decent airflow.
I'll get on with mine in a couple of weeks I hope.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of sm6fhz via groups.io <ingolf.fhz@...>
Sent: 05 January 2023 15:44
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Hermes Board temperatureHi.
Looking at the data sheets for the ADC (LTC2208-14) the dissipated power is specified to 1.32 W.
Clearly a heatsink would be beneficial there.
I suppose that the LTC2208-14 samples the full band (up to 55 MHz) regardless of the displayed BW (.....384, 768, 1536 kHz)
The datasheet for the Tx-DAC (AD9744ARU) specifies a dissipated power of 0.135 W.
I am not sure if a heatsink would do much difference.
73 / Ingolf, SM6FHZ
--
- + - + -Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.