Figure 6-26. Transmit Deviation Balance Alignment Screen (Vhf And 700-800 Mhz) - ASTRO APX 7000 Basic Service Manual

Radio Alignment Procedures: Transmitter Alignments
- 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
4. In the "RF Control" section of the R2670, set the service monitor to the desired frequency (as
shown in the frequency list in the TX Deviation Balance alignment screen).
5. Left-click the PTT Tone: Low button.
6. Left-click the slider of the frequency selected (should be the same frequency as step 4).
7. Left-click the PTT Toggle button on the screen to make the radio transmit. The screen
indicates whether the radio is transmitting.
8. Measure and Record the Low Tone Tx Deviation value from the 8901_ Series Analyzer or the
AC voltage value from the R2670.
Figure 6-26. Transmit Deviation Balance Alignment Screen (VHF and 700–800 MHz)
Figure 6-26 to Figure 6-31.
Sec 1: 6-19