Commit 5a92b269 authored by Bernd-Christian Renner's avatar Bernd-Christian Renner
Browse files

mc

parent b89830c2
...@@ -334,8 +334,8 @@ The evaluation script will only use 4 fixed gin configurations, the additional o ...@@ -334,8 +334,8 @@ The evaluation script will only use 4 fixed gin configurations, the additional o
|3 | VREF | Reference voltage for op-amps | VANA / 2 => 2.5V | |3 | VREF | Reference voltage for op-amps | VANA / 2 => 2.5V |
|4 | VDD | Supply voltage | ~5.25V when RXEN high | |4 | VDD | Supply voltage | ~5.25V when RXEN high |
|5 | LP | Signal after 8th order bandpass filter | PRE2 * 1.5 (42kHz) | |5 | LP | Signal after 8th order bandpass filter | PRE2 * 1.5 (42kHz) |
|6 | SIG | Amplified signal for ADC | |
|7 | AMP | | LP * Gain (Poti) [1] | |7 | AMP | | LP * Gain (Poti) [1] |
|6 | SIG | ADC input (AMP plus buffer RC) | AMP |
|8 | VANA | Switched supply voltage | 5.0V when VDD power good | |8 | VANA | Switched supply voltage | 5.0V when VDD power good |
[1] Gain in unconfigured state: x3 [1] Gain in unconfigured state: x3
...@@ -345,12 +345,12 @@ If the bandpass filter is not working correctly, further points are available fo ...@@ -345,12 +345,12 @@ If the bandpass filter is not working correctly, further points are available fo
![](/images/hardware_check/testpoints/rx_bp.png) ![](/images/hardware_check/testpoints/rx_bp.png)
|Testpoint | Gain | Source | |Testpoint | Gain | Source |
| ----- | ---- | ---- | | ---- | ---- | ---- |
|TB1 | 1.5 | PRE2 | |TB1 | ca. 1.5 | PRE2 |
|TB2 | 1 | TB1 | |TB2 | ca. 1 | TB1 |
|TB3 | 1 (-5%) | TB2 | |TB3 | ca. 1 (-5%) | TB2 |
|TB4 / LP | 1 (+5%) | TB3 | |TB4 / LP | ca. 1 (+5%) | TB3 |
## MB ## MB
......
...@@ -5,6 +5,22 @@ This is the documentation of the ahoi acoustic modem. It includes a description ...@@ -5,6 +5,22 @@ This is the documentation of the ahoi acoustic modem. It includes a description
The hardware comprises a stack of three boards: a mainboard with a microcontroller (blue), a receiver (green), and a transmitter (red). All boards follow a trade-off between high integration to achieve a small overall footprint and easy assembly by hand. We rely on COTS components exclusively, which were easily sourceable at the time of development. Component lists are provided along with schematics. The hardware comprises a stack of three boards: a mainboard with a microcontroller (blue), a receiver (green), and a transmitter (red). All boards follow a trade-off between high integration to achieve a small overall footprint and easy assembly by hand. We rely on COTS components exclusively, which were easily sourceable at the time of development. Component lists are provided along with schematics.
###General properties ###General properties
<center>
| Property | Value |
| --: | -:- |
| Dimensions (wlh) | 50 mm x 50 mm x 25 mm (stacked PCBs, w/o battery and cables) |
| Weight | 150 g |
| Frequency Band | 24 - 84 kHz (depending on configuration) |
| Bandwidth | 24 - 36 kHz (depending on configuration) |
| Data Rate | 250 - 4500 bit per second |
| Transmit Power | up to 5 W (down to 0.75 W) |
| Receive Power | ca. 260 mW |
| Range | 300 m shown in experiments (potentially more than 1 km) |
| Supply voltage | 12V (3S Li-ion Battery) / max. 13V |
</center>
<!--
<table> <table>
<tbody> <tbody>
<tr> <tr>
...@@ -45,3 +61,4 @@ The hardware comprises a stack of three boards: a mainboard with a microcontroll ...@@ -45,3 +61,4 @@ The hardware comprises a stack of three boards: a mainboard with a microcontroll
</tbody> </tbody>
</table> </table>
<br> <br>
-->
...@@ -12,7 +12,7 @@ on Windows machines or the one that comes with your distribution on Linux. ...@@ -12,7 +12,7 @@ on Windows machines or the one that comes with your distribution on Linux.
For Ubuntu, run For Ubuntu, run
``` ```
sudo apt install python3 sudo apt install python3
sudo apt install python3-pip optional sudo apt install python3-pip # optional
``` ```
For Windows (10), go to [https://www.python.org/downloads/windows/](https://www.python.org/downloads/windows/) and For Windows (10), go to [https://www.python.org/downloads/windows/](https://www.python.org/downloads/windows/) and
download the latest stable release (e.g., Python 3.9.2 from Feb. 19, 2021). download the latest stable release (e.g., Python 3.9.2 from Feb. 19, 2021).
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment