MFJ-1278 & MFJ-1278T Fast-Start Manual
7
For detail of Operation in each Operation mode, refer to Chapter 4 of the MFJ-12/8 main instruc-
tion manual.
III. TRANSMIT AUDIO LEVEL SETTING
Before you start to use the MFJ-1278, you must set the transmit audio level properly. Radio port 1
and Radio port 2 must be independently set.
A.
VHF Radio Transmit Audio Level Setting:
1. Connect the radio to a dummy load and listen to the transmission with another radio nearby.
2. With the MFJ-1278 in the VHF packet (VP) mode and under the cmd: command prompt, type:
CALIBRA<CR>
3. Type K, then press the space bar for the higher of the two tones transmitted by the MFJ-1278.
Note the MFJ-1278 will unkey itself after a few seconds. Re-key, if needed by pressing the K
again to transmit.
4. The transmit audio level controls are located on the left side of the MFJ-1278. With a small
screw driver turn the transmit control fully counter-clockwise (minimum).
5. Slowly turn it clockwise (increase) until no increase in audio output level is heard at the moni-
toring receiver.
6. Rotate the the control counter clockwise until the audio Signal on the monitoring receiver is re-
duced by half of the maximum level.
7. Type the K key to return to receive mode.
8. Type the Q key to exit the calibration routine.
B.
HF Radio Transmit Audio Setting:
1. Connect the HF radio to a dummy load.
2. Set the HF radio controls as follows:
VOX: OFF
AGC: FAST
Speech Processor: OFF
Mode Selector: LSB
Meter Switch: Power Reading
Speaker Monitor: ON (if available)
Microphone Gain: 1/4 Turn
3. Under the cmd: command prompt, type:
CALIBRA<CR>
4. Type K, then press the space bar for the lower of the two tones transmitted by the MFJ-1278.
Note the MFJ-1278 will unkey itself after a few seconds. Re-key, if needed by pressing the K
again to transmit.