The video shows how to set the microphone gain, and speech processor compression in SSB. The MIC-EQ feature is a Parametric Equalizer designed to be used with or with the speech processor. The speech processor is design to maximize the output power by increasing the average talk power of you voice and provide most power during voice peaks.
I Also link to another video with more technical background on distortion and overdriving, this video provides a slightly more in-depth look at how USB and Lower Side Band work. These demonstrates the setting the Speech Processor and MIC GAIN with an introduction into the combinations of Processor (PROC) and Parametric Equalizer (MIC EQ) working together.
Part 1
• Video
Part 2
• General SSB Function C...
Adjusting “MIC GAIN” in SSB (MIC-EQ) and (PROC) OFF
1. Adjust the microphone amplifier gain to match the microphone and your voice level by tapping the “METER” on the LCD screen repeatedly until “ALC” is displayed just above the function menu.
2. Place the radio in USB by pressing “MODE” then tapping “USB” on the screen, enter frequency 028.400, by pressing “BAND” and “ENT” then type 028.400 and tap “ENT”
3. In the SSB mode, press the “FM-LIST” and use back forward arrow keys to select and tap “MIC GAIN” while speaking into the microphone adjust the “MULTI” knob so that the “ALC” meter stays within the “ALC” zone of the meter (up to ½ scale deflections) on voice peaks)
Using and Adjusting (SSB) Compression Level “PROC”
1. Tap “METER” and select “COMP” compression meter.
2. Press “FM-LIST” button and use back and forward arrow keys to tap on “PROC” to toggle it on, when on a value from 1-100 will be displayed, turn the “MULTI” function know to verify values change to confirm control.
3. Press the PTT on the microphone and speak into the microphone in a normal voice level while adjusting the “MULTI” knob to set the compression level within the 5dB to 10dB range.
4. Place the radio in USB by pressing “MODE” then tapping “USB” on the screen, enter frequency 028.400, by pressing “BAND” and “ENT” then type 028.400 and tap “ENT”
The Yaesu FT991A has a built in Microphone Parametric Equalizer and a Speech Processor features. These are two separate features however can be coupled to provide wide range of performance.
The below combinations allow using the Parametric Equalizer (active when “MIC-EQ” is on) with or without the Speech Processor “PROC” active.
Combination # 1
“MIC-EQ” Microphone Parametric Equalizer OFF with “PROC” Speech Processor OFF
Combination # 2
“MIC-EQ” Microphone Parametric Equalizer OFF with “PROC” Speech Processor ON
Combination # 3
Below shows the settings for “MENU (SETUP)” options 119-127 with Speech Processor Off
“MIC-EQ” Microphone Parametric Equalizer ON with “PROC” Speech Processor OFF
Microphone Parametric Equalizer Settings 119-127
Menu Label Default Setting Range
119 PRMTRC EQ1 FREQ (Center Freq) OFF 100 - 700 Hz
120 PRMTRC EQ1 LEVEL (Y) 5 (-20 db) to 10 db
121 PRMTRC EQ1 BWTH (Q) 10 1 - 10
122 PRMTRC EQ2 FREQ (Center Freq) OFF 700 - 1500 Hz
123 PRMTRC EQ2 LEVEL (Y) 5 (-20 db) to 10 db
124 PRMTRC EQ2 BWTH (Q) 10 1 - 10
125 PRMTRC EQ3 FREQ (Center Freq) OFF 1500 - 3200 Hz
126 PRMTRC EQ3 LEVEL (Y) 5 (-20 db) to 10 db
127 PRMTRC EQ3 BWTH (Q) 1- 1 - 10
Combination # 4
To configure the Parametric Microphone Equalizer (SSB/AM) with the Speed Processor ON
Below shows the settings for “MENU (SETUP)” options 128-136 with Speech Processor Off
“MIC-EQ” Microphone Parametric Equalizer ON with “PROC” Speech Processor ON
Microphone Parametric Equalizer Settings 128-136
Menu Label Default Setting Range
128 P-PRMTRC EQ1 FREQ (Center Freq) 200 100 - 700 Hz
129 P-PRMTRC EQ1 LEVEL (Y) 0 (-20 db) to 10 db
130 P-PRMTRC EQ1 BWTH (Q) 2 1 - 10
131 P-PRMTRC EQ2 FREQ (Center Freq) 800 700 - 1500 Hz
132 P-PRMTRC EQ2 LEVEL (Y) 0 (-20 db) to 10 db
133 P-PRMTRC EQ2 BWTH (Q) 1 1 - 10
134 P-PRMTRC EQ3 FREQ (Center Freq) 2100 1500 - 3200 Hz
135 P-PRMTRC EQ3 LEVEL (Y) 0 (-20 db) to 10 db
136 P-PRMTRC EQ3 BWTH (Q) 1 1 - 10
More videos to come this is a long topic - still researching
Have a good week from KI5JUF '72
4 окт 2024
