Kantronics KPC-9612 Plus, Руководство пользователя, Страница: 75 / 348

Pin 11 Ground. This pin connects to the ground of your radio. (NOTE: Pins 9
and 10 are also grounded.)
Adjusting High Speed Transmit Drive Level
As with port 1, drive level for port 2 (the high speed port) is set digitally, using
your keyboard and the transmit level command (XMITLVL).
Note: Jumper J20 also affects the drive level. Most “data ready” radios will require
that the jumper be on both pins of J20, which is the “high level” default position as
shipped from the factory. If your radio requires a lower drive level, place the jumper
on just one pin of J20 and readjust the digital drive pot using the XMITLVL com-
mand. For more details, see the hardware section of this manual.
Typically, the proper deviation for 9600 baud operation is about 3 kHz. If you
don’t have a deviation meter, you may have a difficult time in adjusting the level
properly. However, start by setting the drive level as recommended for your radio
(see your radio manual). You may then have to adjust the level using the
XMITLVL command until you achieve acceptable performance.
+ HINT: If you have an existing 9600 baud node or other station operating in your
area that allows digipeating, we suggest you attempt to digipeat through that sta-
tion (see the UNPROTO command) while making this adjustment.
Adjusting High Speed Receive Circuits
As shipped from the factory, the 9612 Plus is set for proper reception with many
of the “data ready” radios on the market. Should you find that your unit is not re-
ceiving well, or if you want to fine-tune it for your specific radio, again, you may
do so digitally, using your keyboard and the EQUALIZE command.
Note: Jumper J16 also affects receive performance. Most “data ready” radios will
provide the 9612 Plus with a high drive, and this is accommodated with a jumper
placed on only one of the pins of J16, which is the “high level” default position
shipped from the factory. If your radio provides lower audio drive, then place the
jumper on both pins of J16.
Port 2: Connecting to a “High Speed” Radio Installing Your KPC-9612 Plus
KPC-9612 Plus v 8.2 59 User’s Guide