July 16, 2004 6881094C28-D
6-8 Radio Alignment Procedures: Transmit Deviation Balance Alignment
-Press the SPF key on the R-2670 to display the “SPECIAL FUNCTIONS MENU.” Move the
cursor to “High Pass,” and select 5 Hz on the soft key menu. Select 20 kHz for the “Low
Pass” setting.
- In the “RF Control” section of the R-2670, enter the frequency displayed on the RSS
screen. Move the cursor to the “B/W” setting and select “WIDE +/- 100 kHz” on the soft key
menu.
- Place the R-2670 cursor in the “Display” zone. Select “AC VOLTS” on the soft key menu.
Move the cursor to the “Range” setting and select “AUTO.”
2. Initial setup using the 8901_ Series Modulation Analyzer:
-Press the FM MEASUREMENT button. (The “Error 03-input level too low” indication is
normal until an input signal is applied.)
- Simultaneously press the Peak – and Peak + buttons. Both LEDs on the buttons should
light.
- Press the 15 kHz LP filter key.
3. Select the TX Deviation Balance alignment screen. The screen indicates the transmit
frequencies to be used. See Figure 6-7 on page 6-8.
4. Left-click the desired frequency field (starting with the highest frequency shown).
5. Left-click the PTT Toggle button on the screen to make the radio transmit. The screen
indicates whether the radio is transmitting.
Figure 6-7. Transmit Deviation Balance Alignment Screen
6. Left-click the PTT Tone: Low button.
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