For reference I also have some other settings on my QRZ page for the P- Settings my QRZ page is www.qrz.com/db...
The FT991A has two built in Parametric Equalizers, one is designed to work with a Speech Processor (P-PRMTRC MENU 128-136) and the other without the Speech Processor (PRMTRC MENU 119-127)
This video takes you through my set and how I have been using my Speech Processor with its dedicated Parametric Equalizer.
There are also demos tested through the FT991A sound card connected to my laptop which allows me to sample the audio as it sounds on the air.
The Speech Processor acts like an air compressor, it takes your voice and concentrates the lows and highs to create a higher average audio resulting in more power in USB and LSB peak power applications.
Link to Part 2 of this series
Part 2-R1 FT991A Setting Up Parametric Equalizer and Speech Processor Live on Radio w/ Pre-Post Test
• Part 2-R1 FT991A Setti...
The goal of radio operators is to have the best modulation and clean sounding audio. Radios in non-HAM applications are sometimes modified to allow for more modulation resulting it what appears to be a “very loud” audio, when in fact the audio is often overdriving the system resulting in distortion. This presentation will focus on setting up and configuring your FT991A to have clean distortion free audio on the air.
The below demonstrates two carriers, one is on frequency, the second is an example of overdriving or mis adjustment to the RF amplifiers causing transmissions across many frequencies or splattering. The splattering shows a carrier frequency for example 27.185 MHz and transmissions every 10 KHz up and down.
The common HF modes used on the FT991A are USB Upper Side Band and LSB Lower Side Band. Typical Band Width is 1.1 to 3.0 kHz average is 2.7 kHz, The transmit band pass can be adjusted under the “MENU / SETUP” setting 110 SSB TX BPF adjust the transmit audio, the setting 100-3000 provides the deepest rich audio quality.
The microphone gain can be a tricky setting. The radio has a built ALC (Automatic Limiting Control) circuit that is designed to “throttle back” the audio thus preventing distortion. The general idea is to watch the ALC meter while talking at a normal voice and adjusting the Microphone Gain until the meter reads just below the 50% and no red is showing. What I find useful is re-verifying the ALC after all processor adjustments are completed just to make sure there is no movement in the red portion of the scale. When setting up speech processor it’s recommended to us a 50-ohm dummy load to provide a realistic senecio.
I use the Yaesu M-100 for both Side Band and FM, each have unique settings, the Treble Boost Cowling is critical for good DX performance and voice concentration into the microphone in SSB. For FM operation I remove the Cowling for more deep rich acoustic quality.
The factory the MH-31A8J microphone has two settings, I find setting number 1 is best for SSB operation.
In the video I mention an on-air test of the FT991A factory Microphone and the Yaesu M-100 I use. This is the link for listening to the different microphones.
• Yaesu MH-31A8J (stock)...
Thanks for watching and ’73 from KI5JUF
18 сен 2024
