# GeoMax Zenith60 / Zenith40

The GeoMax Zenith60 and Zenith40 are professional survey-grade GNSS receivers by GeoMax (Hexagon). The Zenith60 is the flagship model featuring IMU-based tilt compensation, an integrated 4G LTE modem, and optional UHF radio. The Zenith40 is a mid-range model with similar NTRIP capabilities. Both receivers are configured through **X-PAD Ultimate Survey** software running on an Android controller or tablet, or alternatively via the **Zenith Manager** web interface.

## Requirements

* **GeoMax Zenith60 or Zenith40** powered on with clear sky visibility
* **X-PAD Ultimate Survey** on an Android controller or tablet (Android 8.0+)
* **Internet connection** via the receiver's built-in 4G modem (SIM card inserted), phone hotspot over Wi-Fi, or controller mobile data
* **RTKdata.com account** with active RTK credentials (username starting with `rtk` and password from your RTK dashboard)
* **Survey pole** with GeoMax adapter

{% hint style="info" %}
Don't have an RTKdata.com account yet? [Start 30-day Free Trial](https://rtkdata.com/try-rtk-corrections-free-for-30-days/) or [View Pricing](https://rtkdata.com/pricing/)
{% endhint %}

## Step-by-step setup via X-PAD Ultimate Survey

{% stepper %}
{% step %}

#### Connect to the receiver

1. Power on your Zenith60 or Zenith40 and wait for satellite tracking to begin (LED indicators will show satellite lock).
2. Open **X-PAD Ultimate Survey** on your controller.
3. Go to **Tool** menu and select **Connect** (or tap the receiver connection icon).
4. Select your Zenith receiver from the Bluetooth device list and pair it.
5. Once connected, X-PAD will display the receiver model and status.
   {% endstep %}

{% step %}

#### Set up internet connection

1. If using the **receiver's built-in 4G modem** (Zenith60): insert a SIM card into the receiver's SIM slot. The receiver handles the internet connection internally.
2. If using **controller internet**: ensure your Android device has mobile data or is connected to a phone hotspot.
3. In X-PAD, go to **Tool** > **GNSS Configuration** > **Internet** and verify the connection type matches your setup (Receiver Network for internal SIM, PDA Network for controller internet).

{% hint style="warning" %}
The Zenith60's built-in 4G LTE modem (Quectel EG25-G) supports LTE FDD, TDD, UMTS, and GSM bands. If using the internal modem, you may need to configure the APN for your mobile carrier under the receiver's network settings.
{% endhint %}
{% endstep %}

{% step %}

#### Create an NTRIP rover profile

1. In X-PAD Ultimate, go to **Tool** > **GNSS Configuration** > **Working Mode**.
2. Select **Rover** as the working mode.
3. Under **Connection Mode** or **Data Link**, select **Network** (NTRIP).
4. Tap **New** or **Edit** to configure the NTRIP server profile.
5. Name it **RTKdata**.
   {% endstep %}

{% step %}

#### Enter RTKdata.com NTRIP settings

Fill in the NTRIP connection fields. Select the tab for your region:

{% tabs %}
{% tab title="North America" %}

* **Host (domain):** `rtk.rtkdata.com`
* **Host (IP fallback):** `13.56.117.10`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}

{% tab title="Europe" %}

* **Host (domain):** `eu.rtkdata.com`
* **Host (IP fallback):** `3.73.41.96`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}

{% tab title="Australia" %}

* **Host (domain):** `aus.rtkdata.com`
* **Host (IP fallback):** `54.206.56.130`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}
  {% endtabs %}

{% hint style="warning" %}
Type `AUTO` manually in all capital letters. Do not browse the mountpoint table — X-PAD may time out or return an empty list if the source table is large.
{% endhint %}
{% endstep %}

{% step %}

#### Enable GGA position sending

1. In the NTRIP profile settings, ensure **Send GGA** (or **Send NMEA GGA to caster**) is set to **On** or **Automatic**.
2. This sends your approximate position to RTKdata so the correct nearest base station corrections are generated for your location.

{% hint style="danger" %}
RTKdata will not send corrections unless it receives your rover's GGA position. If GGA sending is disabled, the connection will appear successful but no corrections will arrive.
{% endhint %}
{% endstep %}

{% step %}

#### Start the RTK survey

1. Tap **Apply** or **OK** to save the rover configuration.
2. Return to the main survey screen and start a new survey or continue an existing project.
3. X-PAD connects to the internet, then to the RTKdata NTRIP caster.
4. Watch the solution status: **Autonomous** > **Float** > **Fixed**.
5. Once Fixed, you are ready to collect points, stake out, or run your survey workflow.
   {% endstep %}
   {% endstepper %}

## Alternative: Setup via Zenith Manager (Web Interface)

The Zenith60 and Zenith40 also expose a web-based configuration interface called **Zenith Manager** when connected via Wi-Fi or USB:

1. Connect your phone or laptop to the receiver's Wi-Fi hotspot.
2. Open a browser and navigate to the receiver's IP address (typically shown on the receiver display or in its documentation).
3. In Zenith Manager, go to **Configure** > **Rover** > **Network**.
4. Enter the NTRIP caster details (host, port, mountpoint, username, password) as listed above.
5. Select **Connect GPRS** in the status panel to start receiving corrections.

This method is useful for quick testing or when X-PAD is not available.

## Zenith60 tilt compensation

The Zenith60 features IMU-based tilt compensation. Once RTK Fix is achieved, tilt compensation activates — you can measure with the pole tilted without leveling. The Cube-a or X-PAD software will prompt you to initialize the IMU sensor if needed (walk a few steps). Initialization typically takes only a few seconds.

## Vertical reference (heights)

{% hint style="info" %}
Heights from RTKdata.com are **ellipsoidal**, not orthometric (mean sea level). Configure a geoid model in X-PAD under your project coordinate system settings if your project requires orthometric heights.
{% endhint %}

## Troubleshooting

| Problem                      | Cause                                          | Fix                                                                                                              |
| ---------------------------- | ---------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| No internet connection       | SIM card not active or APN not configured      | Check that the SIM card has data. Configure the correct APN for your carrier in the receiver's network settings. |
| Empty mountpoint list        | Source table timeout or wrong host             | Do not browse — type `AUTO` manually in all caps. Verify the host address.                                       |
| No corrections received      | GGA sending disabled                           | Enable **Send GGA** in the NTRIP profile settings. RTKdata requires GGA to select the nearest base.              |
| Stuck on Float               | Poor sky conditions or far from base           | Move to open sky. Check RTKdata base coverage at [rtkdata.com](https://rtkdata.com).                             |
| Credentials rejected         | Using website login instead of RTK credentials | Use the username (starting with `rtk`) and password from your RTK dashboard, not your website account.           |
| "Connection failed" in X-PAD | Wrong network type selected                    | Ensure you selected **Network** (not UHF or Bluetooth) as the data link for NTRIP.                               |

## Tips and tricks

* **The Zenith60's built-in 4G modem** eliminates the need for a phone hotspot — insert a SIM card and the receiver handles internet connectivity independently.
* **Save the NTRIP profile** so your entire crew can load it on their controllers without re-entering settings.
* **Zenith40 users** without a built-in modem should use the controller's internet (PDA Network) or pair a phone hotspot.
* **Check "Correction age"** on the X-PAD status bar. Values above 5 seconds indicate an unstable internet link.
* **Keep firmware updated** via GeoMax's firmware update tools to benefit from the latest constellation support and RTK improvements.
* **X-PAD Ultimate is also compatible** with other GeoMax GNSS receivers (Zenith06, Zenith10, Zenith20) using the same NTRIP settings.