1. Press the Menu key then select the TETRA Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight TETRA Analyzer and press Enter.
Caution
The maximum input power without damage is 2 watts (+33 dBm) to the RF In 50 Ohm connector. To prevent damage, use a coupler or attenuator to reduce the input power to below this level when measuring nearby high output power devices.
2. Connect an antenna with the appropriate frequency range to the RF In50 Ohm connector on the LMR Master.
3. Press the Frequency main menu key to set the center frequency of the measurement. Use the arrow key, rotary knob or the numeric keypad. When using the keypad, select the appropriate terminator submenu key to set the center frequency.
4. Press the Setup main menu key to select the appropriate numeric squelch level for OTA measurements. TETRA analysis uses a proprietary method to estimate BER from the TETRA base station data stream. Refer to TETRA Analyzer Graphs for the available graph types.
Using the Signal Generator for Receiver or OTA Analysis
1. Press the Menu key then select the TETRA Signal Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight TETRA Analyzer and press Enter.
Caution
The maximum output power from the Signal Generator Out connector is 1 mW (0 dBm) and the frequency range is 500 kHz to 1.6 GHz.
2. Direct connect the LMR Master Signal Generator Out 50 Ohm connector to the repeater/receiver or connect an antenna with the appropriate frequency range to the connector.
3. Press the Frequency main menu key to set the transmit frequency using the Tx Freq key. Use the arrow key, rotary knob or the numeric keypad. When using the keypad, select the appropriate terminator submenu key to set the center frequency.
If testing an TETRA repeater, you can bind the transmit frequency to the receive frequency by setting Rx/Tx Coupling to On and entering the Coupling Offset.
Note
When Rx/Tx Coupling is on, the Tx Freq submenu key is disabled.
4. Press the Amplitude main menu key, then the Tx Output Lvl submenu key to set the output power. Enter any output attenuation or gain using the Tx Power Offset key.
5. Set the bandwidth by pressing the Setup main menu key and then the Mod Bandwidth submenu key. Set the signal generator pattern with the Tx Pattern submenu key. Available patterns are listed on the display and additional patterns can be downloaded via the System > Application Options menu.
6. Press the Turn Sig‑Gen ON main menu key to start the signal generator. Press the key again to turn off the signal generator.