- 14 -
Bias "T" Connections
Refer to the MFJ-927 manual for details on the Bias "T". The Bias "T" supplies the DC power
required in the remote tuner using the coaxial cable that goes from the Bias "T" to the remote tuner.
The Bias "T" is usually located in the radio room and has +12 VDC connected to it. Make certain
the coaxial cables are properly connected to the Bias "T" as shown in
Figure 18
. Ensure the
ON/OFF switch on the Bias "T" is turned ON when using the system.
Figure 18
The customer supplied coaxial cable from the Bias "T" (located in the radio room) is connected to
the MFJ tuner SO-239 labeled "TRANSMITTER" using the right angle UHF adapter (included) as
shown in
Figure 19
.
Figure 19
Using the MFJ-927 Auto-Tuner
When using the tuner, refer to the MFJ-927 manual for details. If you try tuning and it seems that
the tuner will not tune up as it should, try 'band switching'. Band switching for this means going up
or down one band, re-tune, and then go back to the desired band and re-tune again. Another option
is to disable memory storage of tuning solutions. This would force the MFJ-927 tuner to re-tune
every time it is used on a different band or frequency. Refer to the MFJ-927 manual for details.
Grounding at the unit is important. Ensure you have a good ground at the tuning unit.
