Setting Audio Levels; Configuring Microkeyer For Your Radio - microHAM microKEYER Manual

For optimum operation in Voice and AFSK Digital modes, the audio levels must be set properly. The function of
each control was explained in detail in AUDIO SWITCHING, AUDIO MIXER and DVK TAB sections. Following a
step-by-step approach will help you to set proper levels.
Configuring micro KEYER for your radio:
1. Open microKEYER and check the jumpers for the sound card preamplifier.
The premplifier is used ONLY in the microphone audio feedinng the
sound card ("C" audio settings). This preamplifier makes the relatively
low level output of dynamic microphones, including Heil HC-4 or HC-5
elements and most amateur hand mics, compatible with the mic input
level of most sound cards. By default (factory setting) this preamp is
bypassed.
2. To enable the preamplifier move the two internal jumpers to the positions
marked as (2-2) on board. The preamplifier is powered from the bias
voltage presented at the microphone jack of the sound card.
TIP: Turn on this preamplifier if you are attaching a dynamic
microphone to either the RJ45 or Ext MIC jack.
WARNING: Never mix types of microphone attached to the microKEYER RJ45 and Ext Mic jack.
Plugging a microphone into the Ext Mic jack will automatically disconnect the mic attached to the RJ-45
jack.
NOTE: The microphone is normally connected directly to the transceiver mic input ("A" Audio settings). If
your transceiver uses an electret mic (Icom transceivers), you must use an electret mic with
microKEYER. If your transceiver uses a dynamic mic (all other manufacturers), you must use a dynamic
mic with microKEYER. DO NOT mix microphones or use a microphone with switchable elements where
one element is electret and one is dynamic.
3. Connect the original microphone for your transceiver directly to the RJ-45 jack on microKEYER.
4. Set the microphone trimmer (adjustment hole in the right side of MK) to the midpoint.
5. Set front panel RADIO control to 3 o'clock.
6. On the Audio Switching tab, set VOICE to: ACA.
7. On the PTT tab, set VOICE to: PTT1 (microphone jack).
8. Set your radio for USB or LSB, connect it to a dummy load, turn off any compression and switch to transmit.
With the MIC GAIN control on the radio, set the proper drive level while speaking into the microphone
(this should be your normal operating level).
Do not adjust the Mic Gain again.
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7 - SETTING AUDIO LEVELS

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