78
Hard Reset
A hard reset process is provided, although you will rarely need to perform this step. A hard reset
will completely erase the memory of your KAM Plus, test some internal hardware, and re-initialize
all parameters to the factory Default values.
When performing a hard reset, you should connect your terminal to the serial port of the KAM Plus
and set your terminal for 1200 baud operation. This allows you to see the messages reported by
the KAM Plus during the resetting process. We recommend using the Pacterm program (provided)
for this. Host mode programs will not display the messages shown.
1. Remove the PC board from the case as detailed in the Assembly and Disassembly section,
above.
2. Connect the serial cable to your KAM Plus and start the Pacterm program.
3. Locate Jumper K6 on the PC board and place the jumper on the both posts.
4. Apply power to the KAM Plus. You should see the following messages displayed on your termi-
nal: CHECKSUM OK ....RAM OK 128K BYTES REPLACE TEST JUMPER
5. Turn the power off and disconnect all cables from the KAM Plus.
6. Place jumper K6 on one post only to re-enable normal Operation.
7. Reassemble the KAM Plus and re-install it in your station. Be sure to re-connect all cables.
If you do not see the message indicated in step 4 above, your KAM Plus has developed a problem.
You should contact Kantronics Service department and discuss the problem with the Service tech-
nician.
Calibration/Equalization
The CALIBRAT command is used to assist the KAM Plus operator in determining the need for
equalization of a received signal. Since this feature is unique to Kantronics TNCs, two stations us-
ing Kantronics TNCs are necessary to utilize this command.
You must have your current I/O stream on the VHF radio port. Once the CALIBRAT command is
given, three options will appear on the terminal screen:
Calibrate Mode Press M.R.S.T, or X
Pressing M will transmit a constant Mark.
Pressing R will measure a square wave received.
Pressing S will transmit a constant Space.
Pressing T will transmit a square wave (space/mark) at the selected tones until a key is pressed.
Pressing X will return the TNC to the Command Mode.
One Station should be used to transmit the square wave, while the receiving station should meas-
ure and compare the space/mark square wave. The transmitting station should set the microphone
level in the mid range.
Once the receiving KAM Plus is placed in the CALIBRATE receive mode, two numbers will appear
on the screen. The KAM Plus is measuring the space/mark square wave generated by the transmit-
ting Station. For the best calibration of the receiving transceiver, set the radio tone controls so that
the two given values are as close to equal as possible.
In most instances when the ratio of the numbers is within a 40/60 or 60/40 range, the PACKET
Station will function normally. A larger disparity in the tones may cause additional retries during
PACKET operation. This ratio may be determined by the following formula:
To Next Page
Loading...
