Kantronics KPC-9612 Plus, Руководство пользователя, Страница: 312 / 348

Pin 12: This pin is the receive clock signal. You may use this pin to connect to an
oscilloscope trigger input to observe the eye-pattern of a 9600 baud signal. The
RXA signal (pin 2) would connect to the vertical input to the scope.
Pin 13: When a ground is applied to this pin and the 9612 Plus CD command is
set to EXTERNAL, the 9612 Plus will not transmit packet. This is normally used
as an external means of supplying carrier detect to the 9612 Plus.
Pin 14: This pin is connected to a buffered A/D converter.
Pin 15: This pin is connected to a buffered A/D converter.
Port 2 (High Speed) Transmit level
+ This section has information beyond that covered in the installation chapter,
which documents the basic procedures for controlling transmit level (as well as
receive level) for port 2.
Drive level for this port should be set so that you achieve a deviation of about 3
kHz in your high-speed ready transceiver (radio). If your radio will transmit
properly with jumper J6 on both posts (dc coupling), we recommend this posi-
tion.
As with port 1, drive level for port 2 (the high speed port) is set digitally, using
your keyboard and the transmit level (XMITLVL) or the calibrate (CAL) com-
mand. However, drive level is also affected by jumper J20, establishing two volt-
age ranges as set by either of the commands listed above. Most “data ready”
radios require the HI range, 80 mV to 4V p-p, with jumper J20 set on both pins
(which is the default position).
Note: If your radio requires a lower drive level, place the jumper on just one pin of
J20 and readjust the digital drive Pot, using XMITLVL or CAL commands to set
drive from 2mV p-p to 200 mV p-p.
Appendix A: Advanced Installation Connecting to your Radios
User’s Guide 296 KPC-9612 Plus v 8.2