3-6 NBFM Analyzer Quick Start Guide
3-14 PN: 10580-00318 Rev. P S412E UG
3-6 NBFM Analyzer
Set the instrument to NBFM Analyzer mode as described in Section 3-2 “Measurement Mode
Selection” on page 3-1.
Set the Receiver (Rx) Frequency
1. Press the Freq main menu key.
2. Press the Rx Freq submenu key.
3. Enter the desired center frequency using the keypad, the arrow keys, or the rotary knob.
When entering a frequency using the keypad, the submenu key labels change to GHz,
MHz, kHz, and Hz. Press the appropriate unit key. Pressing the Enter key has the same
affect as pressing the MHz submenu key. The center frequency and span is shown at the
bottom of the spectrum display. Press the Span submenu key to adjust the
measurement span.
4. Press Setup main key. Use the submenu keys to select the Tone Type.
5. Under the Amplitude main menu, the Auto Rx Range default will adjust the reference
level to display the received signal. To adjust the settings, press Adjust Rx Range then
set the Ref Level and Scale.
Set the Signal Source Transmit (Tx) Frequency
The LMR Master contains a signal generator and test patterns for analog FM land mobile
radios. The maximum output power is 1.0 milliwatt.
1. Press the Freq main menu key.
2. Press the Tx Freq submenu key.
3. Enter the desired frequency using the keypad, the arrow keys, or the rotary knob. When
entering a frequency using the keypad, the submenu key labels change to GHz, MHz,
kHz, and Hz. Press the appropriate unit key. Pressing the Enter key has the same affect
as pressing the MHz submenu key.
4. Press Setup main key and use the Tx pattern submenu key to set the transmit pattern.
Press Enter after selecting a pattern. Based on the pattern selected, set the
AM Percentage or the FM Deviation and Tone Deviation (under the More menu).
Note
The following Quick Start instructions apply to the NBFM mode. For detailed
measurement instructions, refer to the Land Mobile Measurement Guide
P/N 10580-00243, listed in Appendix A.
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.
Note
Bind the transmit frequency to receive frequency using the Rx/Tx Coupling and
Coupling offset submenus under the Frequency menu.
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