Yaesu FT-7800R Technical Supplement

Also see for FT-7800R: Brochure & specs Operating manual

Contents

CTCSS TX Deviation1. Tune the frequency to 440.050 MHz, then activate theCTCSS Encoder with a “100 Hz” tone, and set theTransmit Power Level to “LOW.”2. Press the [BAND(SET)] key while press and holdingthe [ ] key to set the Alignment parameter to “A-5CTC.xxH.”3. Press the PTT switch to activate the transmitter (withno microphone input), and adjust the DIAL knobwhile pressing and holding in the [ ] key, if needed,so that the deviation meter reading is between 0.65kHz and 0.75 kHz.4. Tune the frequency to 146.050 MHz, then activate theCTCSS Encoder with a “100 Hz” tone, and set theTransmit Power Level to “LOW.”5. Press the PTT switch to activate the transmitter (withno microphone input), and adjust the DIAL knob whilepressing and holding in the [ ] key, if needed, so thatthe deviation meter reading is between 0.65 kHz and0.75 kHz.Center Meter Sensitivity1. Tune the frequency to 440.050 MHz.2. Press the [BAND(SET)] key while press and holdingthe [ ] key to set the Alignment parameter to “A-6CNTL/V.”3. Inject a 1 kHz audio tone at a level of +10 dBμ fromthe Audio Generator.4. Press the [LOW(ACC)] key while press and holdingthe [ ] key.S-Meter Sensitivity1. Tune the frequency to 440.050 MHz.2. Press the [BAND(SET)] key while press and holdingthe [ ] key to set the Alignment parameter to “A-7SM L/V.”3. Inject a 440.050 MHz signal at a level of –5 dBμ (with1 kHz modulation @±3.5 kHz deviation) from the RFSignal Generator.4. Press the [LOW(ACC)] key while pressing and hold-ing in the [ ] key.5. Increase the RF Signal Generator output level to +23dBμ.6. Press the [V/M(MW)] key while pressing and holdingin the [ ] key.7. Tune the frequency to 146.050 MHz.8. Inject a 146.050 MHz signal at a level of –5 dBμ (with1 kHz modulation @±3.5 kHz deviation) from the RFSignal Generator.9. Press the [LOW(ACC)] key while pressing and hold-ing in the [ ] key.10. Increase the RF Signal Generator output level to +23dBμ.11. Press the [V/M(MW)] key while pressing and holdingin the [ ] key.12. Tune the frequency to 230.050 MHz.13. Inject a 230.050 MHz signal at a level of –5 dBμ (with1 kHz modulation @±3.5 kHz deviation) from the RFSignal Generator.14. Press the [LOW(ACC)] key while pressing and hold-ing in the [ ] key.15. Increase the RF Signal Generator output level to +23dBμ.16. Press the [V/M(MW)] key while pressing and holdingin the [ ] key.17. Tune the frequency to 850.050 MHz.18. Inject a 850.050 MHz signal at a level of +3 dBμ (with1 kHz modulation @±3.5 kHz deviation) from the RFSignal Generator.19. Press the [LOW(ACC)] key while pressing and hold-ing in the [ ] key.20. Increase the RF Signal Generator output level to +31dBμ.21. Press the [V/M(MW)] key while pressing and holdingin the [ ] key.DC Voltmeter1. Set the power supply voltage to 13.8 VDC.2. Press the [BAND(SET)] key while pressing and hold-ing in the [ ] key to set the Alignment parameter to“A-8 BAT SC.”3. Press the [SCAN(SEL)] key.To close the Alignment mode, just press and hold in thePWR switch for 0.5 seconds (to turn the power off). Thenext time the transceiver is turned on, normal operationmay resume.AlignmentE-4