1. Press the Menu key then select the PTC-ITCR Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight PTC-ITCR 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 receiver center frequency (Rx Freq) 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 choose the Rx and Tx patterns and set the Symbol Rate, Squelch Lvl, and Averaging.
5. Press the Amplitude main menu key, then the Rx Power Offset 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 and select either the Loss or Gain submenu key. The offset will be applied to the Receiver 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 PTC-ITCR 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 PTC-ITCR Analyzer Graphs for information on the available graph types.
Over-the-Air (OTA) Analysis Setup
1. Press the Menu key then select the PTC-ITCR Signal Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight PTC-ITCR 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 using the Rx 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.
4. Press the Setup main menu key, then select the symbol rate of either Half Rate (8 ksps) or Full Rate (16 ksps) by using the Symbol Rate key.
Using the Signal Generator for Receiver or OTA Analysis
1. Press the Menu key then select the PTC-ITCR Signal Analyzer icon or press Shift and then the Mode (9) button to open the Mode Selector dialog box. Highlight PTC-ITCR 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. Directly connect the LMR Master Signal Generator Out50 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 a PTC 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 transmit pattern. Press the Setup main menu and select the Tx Pattern submenu key. The Symbol Rate settings apply to the standard PTC patterns (8 ksps or 16 ksps patterns will be shown, depending on the Symbol Rate setting). 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.