DRA-100-RJ45-REV2 Jumper Settings:

Header - Jumper Summary - Details below this section.

JU1 - Normally in the "L" position.
JU2 - Normally removed - Install to enable AllStarLink CTCSS
JU3 - Normally removed - Install to enable AllStarLink COS.

JU4 - There is NO JU4.  JU4 is not provided or required on this model.
RX Baud rate is chosen at/by the wiring/module installed in the 16 pin configuration socket.

JU5 - Normally in the "R" position.
JU6 - Normally removed - Install to enable VOX.
JU7 - Normally in the "Solid" position. "Flash" blinks the Power LED when COMM OK.
JU8 - Normally installed. Remove to add attenuation to the RX path.
JU9 - Normally installed. Remove to add attenuation to the TX path.

Detailed explanation of these headers and jumpers:

JU1 - VOX Input Selection - Controls which audio channel drives the VOX input.
Position L = Left channel is sampled to drive the VOX.
Position R = Right channel is sampled to drive the VOX.
Default is "L".
For detailed VOX operation, please see the article on the FAQ page.

JU2 - CTCSS Enable / Disable - AllStar Link
JU2 is placed to enable the CTCSS feature.
JU2 is removed to disable the CTCSS feature.
Default is removed.

JU3 - COS Enable / Disable - AllStar Link
JU3 is placed to enable the COS feature.
JU3 is removed to disable the COS feature.
Default is removed.

JU4 - Header JU4 is not physically present on this model.

JU5 - LEFT or RIGHT TX Audio Output to "MIC" (pin 15) on the configuration socket.
JU5 selects between Left or Right transmit audio channels. L = Left - R = Right.
Default is "R".

JU6 - VOX Enable / Disable
JU6 is placed to enable the VOX PTT feature.
JU6 is removed to disable the VOX PTT feature.
For detailed VOX operation, please see the DRA-100 VOX page.
Default is removed.

JU7 - Operation of the Power / Heart-Beat / COMM OK LED - Solid or Flash.
JU7 changes the operation of the multi-color LED located on the left side of the front panel. This LED 
combines the status of Power, HB and COMM OK into one indicator light. On other DRA's, these are the 
Green and Blue LEDs. Upon powering the board - the Power LED illuminates Amber. When JU7 is set to 
"Solid" the Power LED will turn solid Green when HB is running and you'd expect to see the Blue LED 
solidly lit on any other DRA. When JU7 is set to "Flash" the Power LED alternately flashes between 
Yellow and Green when HB is running and you'd expect to see the Blue LED solidly lit on any other 
DRA. This action is not as "in your face"as a blinking Green LED. Those that already have others DRAs 
may want to see the flashing light, while others may prefer less distraction.
Default is "Solid"

JU8 - RX Audio level attenuator:
JU8 is for the receive (RX) path.
JU8 - Normally installed. Remove to add attenuation to the RX path.  When a jumper are placed on this 
header, the audio level is not reduced. It is the same as other DRA.  When removed, the receive level 
is reduced by 20 dB.

JU9 - TX Audio level attenuator:
JU9 is for the RIGHT channel transmit (TX) path (front panel TX control only). When a jumper are placed 
on this header, the audio level is not reduced. It is the same as other amplified DRAs.  When removed, 
the transmit level is reduced by 20 dB.
JU9 - Normally installed. Remove to add attenuation to the right channel TX path.

NOTE: There is no selectable attenuation jumper for the left channel which is normally used for VOX 
operation.  Only the internal blue pot R16 is used to physically adjust the level of the left channel. 
Normally R16 is set to mid rotation, or a little higher for proper VOX drive.

By default, we recommend NOT installing the jumper shorting bar on JU2, JU3 and JU6 for VARA FM, 
VARA HF, SoundModem, fldigi, and DireWolf.