1. Press the Menu key then select the dPMR Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight dPMR 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 high output power devices.
2. Connect the transmitter to the RF In50 Ohm connector on the LMR Master using a coupler or attenuator.
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. The Setup main menu key shows the modulation bandwidth and allows setup of the squelch level and averaging.
5. Press the Amplitude main menu key, then the Rx PowerOffset submenu key to set the receiver attenuation (or gain). Use the arrow keys, rotary knob or the numeric keypad to enter the adjustment value, up to 100 dB. The offset will be applied to the Received Power value in the Summary graph. For instance, if the transmitter under test is emitting 50 watts (+47 dBm) of power, and the External Attenuation value is 40 dB (such as from a 40 dB directional coupler) the Received Power displayed will be +7 dBm.
6. Press the Measurement key, then the dPMR Analyzer submenu key. Select the Graph types to view with the Graph Type submenu key. The Symbol Span submenu is used to adjust the number of “eyes” displayed across the screen in the Eye Diagram graph. Refer to dPMR Analyzer Graphs for the available graph types.
Over the Air (OTA) Analysis Setup
1. Press the Menu key and then select the dPMR Analyzer icon, or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight dPMR 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 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 Amplitude main menu key and insure the Rx PowerOffset is set 0.0 dB, then set the Auto Rx Range to On.
5. Press the Measurement key, then the dPMR Analyzer submenu key. Select the Graph types to view with the Graph Type submenu key. The Symbol Span submenu is used to adjust the number of “eyes” displayed across the screen in the Eye Diagram graph. Refer to dPMR Analyzer Graphs for the available graph types.