CS2389 4G Signal Tester – CSL Signal Analyser 3G/4G/WiFi


CSL Signal Analyser CS2389 4G Signal Tester provides a quick site scan to show available 2G, 3G and 4G mobile phone networks with basestation details and signal strengths to aid with the choice of 3G or 4G SIM Card provider for use in your 4G router and to aid in the positioning for your 4G antenna.

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CS2389 4G Signal Tester

The CS2389 CSL Signal Analyser is a great tool for installers of 4G routers and 4G Antennas.  This 4G Signal Analyser shows the available mobile phone networks in the location of the tester, along with base station information and signal strength.  This 4G Signal tester will provide the information for the choice of 4G SIM card / Mobile network operator has the best service signal strength for use with your 4G router or for the best installation location for your 4G antenna if using an external 4G antenna with your 4G router.

The CS2389 signal analyser is quick and easy to use and can do a quick network scan with the touch of a single button via the colour touch screen display.  All the network scans are stored in the memory of the CS2389 tester so you can connect it to your PC via USB and download the scan data to your PC or laptop.

CS2389 Network Compatibility

The CSL 4G signal tester works for all UK 2G, 3G and 4G mobile phone networks but does not currently support the newer 5G mobile network frequency bands.  CSL will probably launch a new 5G signal tester in 2021 but until then the CSL signal analyser will support the installer for the majority of installs as the roll out of 5G networks and associated 5G routers and 5G Fixed IP SIM cards is still quite small and many M2M installers are still using 4G routers, 4G antennas and 4G Fixed IP SIM cards for their remote monitoring and management solutions.

Using the CS2389 Signal Analyser.

CSL Signal Analyser is intended to be used to identify the optimum location for your connected device prior to installation. Designed to relay accurate and essential data, to ensure the best installation every time. It measures and displays radio signal strength and is available in 2G and 4G versions.

Information is fed back to the device, including the network provider, radio technology, signal quality and signal strength. No SIM is required to perform network surveys which you can also save for future reference.

CSL Signal Analyser is ideal to use for alarm signalling, 4G routers, deploying parking meters/smart meters, telehealth products and more.

Key Features and Benefits for installers:

– New colour touch screen with a handy dashboard menu
– Quick Survey Button to run a survey in just one click
– Fully visual monitor mode
– Up to 20-hour battery life
– Memory space holds survey results for up to 250 tests
– Available in 10 different languages
– USB firmware upgrades
– CS2389 4G variant can be used for 2G/3G/4G surveys

The CS2389 Signal tester is supplied as standard with the rubber protective boot / cover, and comes with a stylus, world charger, USB cable and SIM adapters.

CS2389 4G Signal Tester – Frequently Asked Questions

Do I need to use a SIM?
A SIM is not needed for surveys it is only required when using monitor mode. The SIM used must be at least the same RAT (ie 2G/3G/4G) that you are looking to monitor, however it does not need to be on the same network.

Can I use my own SIM?
Yes, any SIM can be used as long as the pin code function has been removed. If you wish to use a micro or nano SIM, the SIM carrier provided must be used to make it the required size and ensure it fits into the device correctly.

I am running a survey but want to cancel?
While a survey is running you cannot cancel or complete any other actions, you must wait for the survey to complete or power off the device.

What is the difference between battery saver and auto turn off?
Battery saver puts the radio module into sleep mode and dims the brightness off the screen to save battery power. Auto turn off enables you to select a time that if the unit is not in use it will automatically power off to conserve battery power (as standard this is set to 5 minutes).

Why can’t I see all the networks? (in single network or monitor mode)
If you can’t see your preferred network try refreshing the network. After this refresh the networks available in your location will be displayed, if you still can’t see your chosen network it may be that it is not available in that area.

What do the icons mean?
If you are unsure what the function of an icon is you can use the self help function to display a description (press and hold the icon for 3 seconds).


To ensure that a consistent approach is used to all Radio Access Technologies (RAT) – such as 2G, 3G and 4G – a new, more accurate method for calculating percentage of the signal strength has been introduced. The RSSL is not based on CSQ readings alone provided by the radio module, but is calculated from the raw data received from the network readings. The value is mapped through the whole range and is independent for each RAT. The value calculation includes both signal strength and signal quality measurements.

The example of such mapping for a 3G cell is:

RSCP: -80 dBm
RSRQ: -4 dB
CSQ: 19
RSSL: 67%

List Of Supported Languages





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