virajshah · August 26, 2019 01:36 · Sep 18, 2018 · Sep 16, 2018 · Sep 16, 2018 · Sep 16, 2018
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -111,6 +111,8 @@ If there are errors, or if the device is not recognized:
  - Ensure the dongle is secured in the USB port
  - Remove all USB hubs and plug in into the Pi directly
  - Make sure you power your Raspberry Pi with at least a 2.5A power supply
+ - Check the device using `lsusb` command. You should see `ID 0bda:2838 Realtek Semiconductor Corp. RTL2838` or something of the like listed there. If not, try the previous steps.
+ - Run `dmesg` and check for errors such as `error -71` related to the USB device. This may mean that your RTL-SDR receiver might be broken. This happened to me, so I ordered another one, which ran fine.  
 
 #### 5. Install [`goestools`](https://github.com/pietern/goestools.git)
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -184,9 +184,11 @@ The `vit(avg)` stat shows the average [viterbi error rate](https://en.wikipedia.
 
 If there's no signal, the `vit` value should be over 2000. When signal is stronger it should decrease. 
 
-This should help you point the antenna correctly. Slightly rotate the dish right or left and note whether the `vit` errors are increasing or decreasing. Once you're at the local error minimum, adjust the vertical angle, and do the same. 
+This should help you point the antenna correctly. Slightly rotate the dish right or left and note whether the `vit` errors are increasing or decreasing. 
 
-Once the `vit` errors are at their lowest, you've pointed the antenna! Double check the antenna position again. GOES-17 and GOES-16 are only about 15 degrees from each other in the sky.
+Once you're at the local error minimum, perform the same process to find the minimum error rate while slightly adjusting the vertical angle. 
+
+When the `vit` errors are at their lowest, you've pointed the antenna. Double check the antenna position again with a compass to make sure you're pointed at the intended satellite; GOES-17 and GOES-16 are only about 15 degrees from each other in the sky.
 
 #### 9. Restart `goesrecv` and play around with the config parameters.
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -204,6 +204,8 @@ Once you decreased the error rates, but your `vit` is still over 400, try making
 
 #### 10. Process packets into images
 
+While goesrecv is running, in a separate session, run:
+
 ```bash
 goesproc -c /usr/share/goestools/goesproc-goesr.conf -m packet  --subscribe tcp://127.0.0.1:5004
 ```

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -198,7 +198,7 @@ If the average errors are at around 1500-1800, try the following:
 
  - Cool the Raspberry Pi and the RTL-SDR dongle. I've noticed that temperature might significantly affect reception quality.
 
- - Play around with `goesproc.conf` parameters. Try adjusting the `gain` and `sample_rate`. For the NooElec XTR or other E4000 tuners, you might need to set your gain to `10` or below. 
+ - Play around with `goesrecv.conf` parameters. Try adjusting the `gain` and `sample_rate`. For the NooElec XTR or other E4000 tuners, you might need to set your gain to `10` or below. 
 
 Once you decreased the error rates, but your `vit` is still over 400, try making very slight adjustments to the antenna again.
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -107,7 +107,7 @@ If it hangs, just press `crtl-c` to exit. It doesn't have to finish.
 
 If there are errors, or if the device is not recognized:
 
- - Reinstall the driver from Step 3 driver
+ - Reinstall the driver from Step 3
  - Ensure the dongle is secured in the USB port
  - Remove all USB hubs and plug in into the Pi directly
  - Make sure you power your Raspberry Pi with at least a 2.5A power supply

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -200,7 +200,7 @@ If the average errors are at around 1500-1800, try the following:
 
  - Play around with `goesproc.conf` parameters. Try adjusting the `gain` and `sample_rate`. For the NooElec XTR or other E4000 tuners, you might need to set your gain to `10` or below. 
 
-Once you decreased the error rates, but your `vit` is still over 400, try making cery slight adjustments to the antenna again.
+Once you decreased the error rates, but your `vit` is still over 400, try making very slight adjustments to the antenna again.
 
 #### 10. Process packets into images
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -219,6 +219,7 @@ Writing: ./goes16/m1/ch07/2018-09-15/GOES16_M1_CH07_20180915T231820Z.jpg
 ...
 ```
 
+
 ![](https://goesdata.lxe.co/goes16/fd/fc/2018-09-15/GOES16_FD_FC_20180915T213030Z.jpg)
 
 #### 11. TODO: Automatically restart goesrecv, store images on S3, send metrics to statsd and Grafana, and make videos!

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -210,7 +210,17 @@ goesproc -c /usr/share/goestools/goesproc-goesr.conf -m packet  --subscribe tcp:
 
 Once `goesproc` receives enough packets, it will start writing images and text to the locations described in `/usr/share/goestools/goesproc-goesr.conf`.
 
+```
+Writing: ./goes16/m2/ch13/2018-09-15/GOES16_M2_CH13_20180915T231750Z.jpg
+Writing: ./goes16/m2/ch13_enhanced/2018-09-15/GOES16_M2_CH13_enhanced_20180915T231750Z.jpg
+Writing: ./goes16/m2/ch02/2018-09-15/GOES16_M2_CH02_20180915T231750Z.jpg
+Writing: ./goes16/m2/fc/2018-09-15/GOES16_M2_FC_20180915T231750Z.jpg
+Writing: ./goes16/m1/ch07/2018-09-15/GOES16_M1_CH07_20180915T231820Z.jpg
+...
+```
+
+![](https://goesdata.lxe.co/goes16/fd/fc/2018-09-15/GOES16_FD_FC_20180915T213030Z.jpg)
 
-#### 11. TODO: Automatically restart goesrecv, store images on S3, and send metrics to statsd and Grafana
+#### 11. TODO: Automatically restart goesrecv, store images on S3, send metrics to statsd and Grafana, and make videos!
 
 Stay tuned!
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -211,4 +211,6 @@ goesproc -c /usr/share/goestools/goesproc-goesr.conf -m packet  --subscribe tcp:
 Once `goesproc` receives enough packets, it will start writing images and text to the locations described in `/usr/share/goestools/goesproc-goesr.conf`.
 
 
+#### 11. TODO: Automatically restart goesrecv, store images on S3, and send metrics to statsd and Grafana
 
+Stay tuned!
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -157,7 +157,7 @@ If you're using a NooElec SmarTee dongle with an always-on bias tee, or if you'r
 
 If you're using RTL-SDR.com dongle, set `bias_tee = true` to power the SAWBird board. 
 
-#### 7. Roughly point your antenna at the satellite.
+#### 7. Roughly point your antenna at the satellite
 
 Find where the GOES-16 or GOES-17 satellites are in the sky at your location using [agsattrack.com](http://www.agsattrack.com/). 
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -30,7 +30,7 @@ Assembly:
 [Antenna] --- [Adapter] --- [(input) SAWBird+ (output)] --- RTL-SDR (with Bias Tee)] --- [Raspberry Pi]
 ```
 
-
+![](https://i.imgur.com/G8BfPP6.jpg)
 
 
 ## Software

diff --git a/connections.jpg b/connections.jpg
diff --git a/connections.jpg b/connections.jpg
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -27,9 +27,12 @@ Total: **~$185**
 Assembly:
 
 ```
-[Antenna] --- [Adapter] --- [(input) SAWBird+ (output)] --- cable --- [RTL-SDR] --- usb --- [Raspberry Pi]
+[Antenna] --- [Adapter] --- [(input) SAWBird+ (output)] --- RTL-SDR (with Bias Tee)] --- [Raspberry Pi]
 ```
 
+
+
+
 ## Software
 
 Prep your Raspberry Pi and install necessary drivers and software.

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -1,4 +1,4 @@
-# A guide on how to receive GOES-16 and GOES-17 images using an RTL-SDR dongle.
+# Receive GOES-16 and GOES-17 Images with a Raspberry Pi and RTL-SDR dongle
 
 Also see the [original Pieter Noordhuis's guide](https://pietern.github.io/goestools/guides/minimal_receiver.html#minimal-receiver)
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -127,7 +127,7 @@ sudo make -j2 install
 #### 6. Create `goesrecv.conf` config
 
 ```bash
-cat <<EOF > ~/.goesrecv.conf
+cat <<EOF > ~/goesrecv.conf
 [demodulator]
 mode = "hrit"
 source = "rtlsdr"

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -160,7 +160,7 @@ Find where the GOES-16 or GOES-17 satellites are in the sky at your location usi
 
 Note the **azimuth** and **elevation**.
 
-Use an **actual real compass** to point your dish at the azimuth. I've been using the iPhone phone compass, which has a 20-30 degree error, which renders it practically useless. 
+Use an **actual real compass** to point your dish at the azimuth. I've been using the iPhone phone compass, which has a 20-30 degree error, rendering it practically useless. 
 
 Adjust your dish angle according to the elevation. 
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -92,6 +92,23 @@ sudo reoboot
 rtl_test 
 ```
 
+You should see something like this:
+
+```
+Found 1 device(s):
+  0:  Realtek, RTL2838UHIDIR, SN: 00000001
+...
+```
+
+If it hangs, just press `crtl-c` to exit. It doesn't have to finish. 
+
+If there are errors, or if the device is not recognized:
+
+ - Reinstall the driver from Step 3 driver
+ - Ensure the dongle is secured in the USB port
+ - Remove all USB hubs and plug in into the Pi directly
+ - Make sure you power your Raspberry Pi with at least a 2.5A power supply
+
 #### 5. Install [`goestools`](https://github.com/pietern/goestools.git)
 
 ```bash

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -34,8 +34,21 @@ Assembly:
 
 Prep your Raspberry Pi and install necessary drivers and software.
 
+#### 0. Get your Raspberry Pi ready
+
+ - Download [Raspbian Lite Image](https://www.raspberrypi.org/downloads/raspbian/) and [Etcher](https://etcher.io/)
+ - Use Etcher to write the image to the SD card.
+ - Mount the SD card as a volume on your machine.
+ - Follow [this procedure](https://www.raspberrypi.org/forums/viewtopic.php?t=191252) to configure WiFi and SSH.
+ - Plug the card into your Raspberry Pi and turn it on.
+ - Find the IP address of the Raspberry Pi using your gateway/router administrative interface.
+
+Now you can SSH into your Raspberry PI as `pi` with a default password `raspberry`. 
+
 #### 1. Get everything up to date
 
+From now on all commands should be run on the Raspberry Pi.
+
 ```bash
 sudo apt update
 sudo apt dist-upgrade

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -1,5 +1,7 @@
 # A guide on how to receive GOES-16 and GOES-17 images using an RTL-SDR dongle.
 
+Also see the [original Pieter Noordhuis's guide](https://pietern.github.io/goestools/guides/minimal_receiver.html#minimal-receiver)
+
 ## Hardware
 
 You need:

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -167,4 +167,13 @@ If the average errors are at around 1500-1800, try the following:
 
 Once you decreased the error rates, but your `vit` is still over 400, try making cery slight adjustments to the antenna again.
 
+#### 10. Process packets into images
+
+```bash
+goesproc -c /usr/share/goestools/goesproc-goesr.conf -m packet  --subscribe tcp://127.0.0.1:5004
+```
+
+Once `goesproc` receives enough packets, it will start writing images and text to the locations described in `/usr/share/goestools/goesproc-goesr.conf`.
+
+
 
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -4,7 +4,7 @@
 
 You need:
 
- 1. [Rasbperry Pi Model B (or B+)](https://www.google.com/search?q=raspberry+pi&tbm=shop) with a MicroSD Card **$35-40**
+ 1. [Raspberry Pi Model B (or B+)](https://www.google.com/search?q=raspberry+pi&tbm=shop) with a MicroSD Card **$35-40**
  2. An [RTL-SDR](https://www.rtl-sdr.com/about-rtl-sdr/) dongle:
     - [RTL-SDR.COM V3](https://www.amazon.com/dp/B0129EBDS2/) **~$25** or
     - [NooElec NESDR SmarTee](https://www.amazon.com/NooElec-NESDR-SMArt-Enclosure-R820T2-Based/dp/B01HA642SW) **~$25** or
@@ -71,7 +71,7 @@ echo 'blacklist dvb_usb_rtl28xxu' | sudo tee --append /etc/modprobe.d/blacklist-
 sudo reoboot
 ```
 
-#### 4. Test youe the RTL-SDR dongle
+#### 4. Test your the RTL-SDR dongle
 
 ```bash
 rtl_test 
@@ -165,6 +165,6 @@ If the average errors are at around 1500-1800, try the following:
 
  - Play around with `goesproc.conf` parameters. Try adjusting the `gain` and `sample_rate`. For the NooElec XTR or other E4000 tuners, you might need to set your gain to `10` or below. 
 
-Once you decresed the error rates, but your `vit` is still over 400, try making cery slight adjustments to the antenna again.
+Once you decreased the error rates, but your `vit` is still over 400, try making cery slight adjustments to the antenna again.
 
 
diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -30,9 +30,9 @@ Assembly:
 
 ## Software
 
-Prep your Raspberry Pi:
+Prep your Raspberry Pi and install necessary drivers and software.
 
-1. Get everything up to date
+#### 1. Get everything up to date
 
 ```bash
 sudo apt update
@@ -42,14 +42,14 @@ sudo apt dist-upgrade
 sudo reboot
 ```
 
-2. Install dependencies
+#### 2. Install dependencies
 
 ```bash
 # get the packages necessary to build and run goestools
 sudo apt install git build-essential cmake libusb-1.0 libopencv-dev libproj-dev
 ```
 
-3. Install `librtlsdr`
+#### 3. Install `librtlsdr`
 
 Grab the latest [librtlsdr](https://github.com/steve-m/librtlsdr.git) source, compile it, and install the shared libraries/includes. 
 
@@ -71,13 +71,13 @@ echo 'blacklist dvb_usb_rtl28xxu' | sudo tee --append /etc/modprobe.d/blacklist-
 sudo reoboot
 ```
 
-4. Test youe the RTL-SDR dongle
+#### 4. Test youe the RTL-SDR dongle
 
 ```bash
 rtl_test 
 ```
 
-5. Install [`goestools`](https://github.com/pietern/goestools.git)
+#### 5. Install [`goestools`](https://github.com/pietern/goestools.git)
 
 ```bash
 git clone https://github.com/pietern/goestools.git
@@ -92,7 +92,7 @@ cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
 sudo make -j2 install 
 ```
 
-6. Create `goesrecv.conf` config
+#### 6. Create `goesrecv.conf` config
 
 ```bash
 cat <<EOF > ~/.goesrecv.conf
@@ -122,7 +122,7 @@ If you're using a NooElec SmarTee dongle with an always-on bias tee, or if you'r
 
 If you're using RTL-SDR.com dongle, set `bias_tee = true` to power the SAWBird board. 
 
-7. Roughly point your antenna at the satellite.
+#### 7. Roughly point your antenna at the satellite.
 
 Find where the GOES-16 or GOES-17 satellites are in the sky at your location using [agsattrack.com](http://www.agsattrack.com/). 
 
@@ -132,7 +132,7 @@ Use an **actual real compass** to point your dish at the azimuth. I've been usin
 
 Adjust your dish angle according to the elevation. 
 
-8. Run goesrecv and perform fine antenna adjustments
+#### 8. Run goesrecv and perform fine antenna adjustments
 
 ```bash
 goesrecv -v -i 1 -c ~/goesrecv.conf
@@ -153,7 +153,7 @@ This should help you point the antenna correctly. Slightly rotate the dish right
 
 Once the `vit` errors are at their lowest, you've pointed the antenna! Double check the antenna position again. GOES-17 and GOES-16 are only about 15 degrees from each other in the sky.
 
-9. Restart `goesrecv` and play around with the config parameters.
+#### 9. Restart `goesrecv` and play around with the config parameters.
 
 If your `vit` errors are under 400, and you're observing no packet drops, you're all set!
 

diff --git a/goes16-rtlsdr.md b/goes16-rtlsdr.md
@@ -0,0 +1,170 @@
+# A guide on how to receive GOES-16 and GOES-17 images using an RTL-SDR dongle.
+
+## Hardware
+
+You need:
+
+ 1. [Rasbperry Pi Model B (or B+)](https://www.google.com/search?q=raspberry+pi&tbm=shop) with a MicroSD Card **$35-40**
+ 2. An [RTL-SDR](https://www.rtl-sdr.com/about-rtl-sdr/) dongle:
+    - [RTL-SDR.COM V3](https://www.amazon.com/dp/B0129EBDS2/) **~$25** or
+    - [NooElec NESDR SmarTee](https://www.amazon.com/NooElec-NESDR-SMArt-Enclosure-R820T2-Based/dp/B01HA642SW) **~$25** or
+    - *[NooElec NESDR SmarTee XTR](https://www.amazon.com/NooElec-NESDR-SMArTee-XTR-SDR/dp/B06Y1D7P48)* **~$40**
+ 3. [LNA](https://en.wikipedia.org/wiki/Low-noise_amplifier) and [SAW filter](https://en.wikipedia.org/wiki/Surface_acoustic_wave#Application_in_electronic_components) for around 1.69GHz
+    - [NooElec SAWBird+ GOES](http://www.nooelec.com/store/sawbird-plus-goes.html) **~$35**
+ 4. A 1.6 - 1.9 GHz parabolic grid antenna
+    - *[ZDAGP1900-20-15----1850-1990MHz 20dBi](https://www.excel-wireless.com/1900-mhz-grid-parabolic-antenna/1850-1990-mhz-grid-parabolic-antenna-20-dbi)* **~$100** or
+    - [More dBi Options](http://www.zdacomm.com/1900-mhz-grid-paraboilc-dish-antenna-series.html)
+    - Or use a [Modified 2.4 GHz WiFi grid antenna](https://www.reddit.com/r/RTLSDR/comments/9ahdzc/modification_of_wifi_grid_antenna_to_make_it_work/) **~$60**
+ 5. Adapter (depending on the antenna terminal):
+    - [N-Male to SMA Male](https://www.amazon.com/gp/product/B01MFHRW4N/) **$5-10** 
+ 6. Cable(s)
+    - [SMA Male to Male](https://www.amazon.com/s/ref=nb_sb_ss_c_1_4?url=search-alias%3Delectronics&field-keywords=sma+male+to+sma+male) **$5-10** 
+
+Total: **~$185**
+
+Assembly:
+
+```
+[Antenna] --- [Adapter] --- [(input) SAWBird+ (output)] --- cable --- [RTL-SDR] --- usb --- [Raspberry Pi]
+```
+
+## Software
+
+Prep your Raspberry Pi:
+
+1. Get everything up to date
+
+```bash
+sudo apt update
+sudo apt dist-upgrade
+
+# reboot the device
+sudo reboot
+```
+
+2. Install dependencies
+
+```bash
+# get the packages necessary to build and run goestools
+sudo apt install git build-essential cmake libusb-1.0 libopencv-dev libproj-dev
+```
+
+3. Install `librtlsdr`
+
+Grab the latest [librtlsdr](https://github.com/steve-m/librtlsdr.git) source, compile it, and install the shared libraries/includes. 
+
+```bash
+# download, compile, and install librtlsdr
+git clone https://github.com/steve-m/librtlsdr.git
+cd librtlsdr
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DINSTALL_UDEV_RULES=ON ..
+sudo make -j2 install
+
+# load udev rules and blacklist the DVB driver shipped with the OS
+sudo cp ../rtl-sdr.rules /etc/udev/rules.d/
+sudo ldconfig
+echo 'blacklist dvb_usb_rtl28xxu' | sudo tee --append /etc/modprobe.d/blacklist-dvb_usb_rtl28xxu.conf
+
+# reboot the device
+sudo reoboot
+```
+
+4. Test youe the RTL-SDR dongle
+
+```bash
+rtl_test 
+```
+
+5. Install [`goestools`](https://github.com/pietern/goestools.git)
+
+```bash
+git clone https://github.com/pietern/goestools.git
+cd goestools
+git submodule init
+git submodule update --recursive
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
+
+# this will take a while on a raspberry pi
+sudo make -j2 install 
+```
+
+6. Create `goesrecv.conf` config
+
+```bash
+cat <<EOF > ~/.goesrecv.conf
+[demodulator]
+mode = "hrit"
+source = "rtlsdr"
+
+[rtlsdr]
+frequency = 1694100000
+sample_rate = 2400000
+gain = 5
+bias_tee = false
+
+[costas]
+max_deviation = 200e3
+
+[decoder.packet_publisher]
+bind = "tcp://0.0.0.0:5004"
+send_buffer = 1048576
+
+[monitor]
+statsd_address = "udp4://localhost:8125"
+EOF
+```
+
+If you're using a NooElec SmarTee dongle with an always-on bias tee, or if you're powering your SAWBird through the micro USB port, set `bias_tee = false` under `[rtlsdr]`. 
+
+If you're using RTL-SDR.com dongle, set `bias_tee = true` to power the SAWBird board. 
+
+7. Roughly point your antenna at the satellite.
+
+Find where the GOES-16 or GOES-17 satellites are in the sky at your location using [agsattrack.com](http://www.agsattrack.com/). 
+
+Note the **azimuth** and **elevation**.
+
+Use an **actual real compass** to point your dish at the azimuth. I've been using the iPhone phone compass, which has a 20-30 degree error, which renders it practically useless. 
+
+Adjust your dish angle according to the elevation. 
+
+8. Run goesrecv and perform fine antenna adjustments
+
+```bash
+goesrecv -v -i 1 -c ~/goesrecv.conf
+```
+
+This will show output every second that looks something like this:
+
+```
+...
+2018-09-15T21:52:03Z [monitor] gain:  8.44, freq: -2121.4, omega: 2.589, vit(avg):  2400, rs(sum):  0, packets: 0, drops:  55
+```
+
+The `vit(avg)` stat shows the average [viterbi error rate](https://en.wikipedia.org/wiki/Viterbi_error_rate) over 1 second interval (if running with `-i 1`). 
+
+If there's no signal, the `vit` value should be over 2000. When signal is stronger it should decrease. 
+
+This should help you point the antenna correctly. Slightly rotate the dish right or left and note whether the `vit` errors are increasing or decreasing. Once you're at the local error minimum, adjust the vertical angle, and do the same. 
+
+Once the `vit` errors are at their lowest, you've pointed the antenna! Double check the antenna position again. GOES-17 and GOES-16 are only about 15 degrees from each other in the sky.
+
+9. Restart `goesrecv` and play around with the config parameters.
+
+If your `vit` errors are under 400, and you're observing no packet drops, you're all set!
+
+If the average errors are at around 1500-1800, try the following:
+
+ - Terminate and restart `goesrecv`. This should allow it to readjust the gain and frequency offset to get a better read on the signal.
+
+ - Cool the Raspberry Pi and the RTL-SDR dongle. I've noticed that temperature might significantly affect reception quality.
+
+ - Play around with `goesproc.conf` parameters. Try adjusting the `gain` and `sample_rate`. For the NooElec XTR or other E4000 tuners, you might need to set your gain to `10` or below. 
+
+Once you decresed the error rates, but your `vit` is still over 400, try making cery slight adjustments to the antenna again.
+
+