---

TNC SETUP - CALIBRATION MODE: USING A SERVICE MONITOR

TNC Setup spec's

Serial port speed - 9600

Air data rate  - 1200

Nominal current draw @ 15 mA

Capable of only 8.5 mA draw

(Leds off and jumper set to 3.3 V)

Firmware 8.3  KA Node (personal)

Firmware  9.1 - K-Net Node (network)

Checking deviation level should be done with a calabrated communications service monitor.

Using the simple terminal to access the command prompt. (Help\Simple terminal)

Note: Testing in our terrain the best overall deviation level appears to be 2.75 kHz

The calibration command is "CAL"

CALIBRATE MODE:

M - Sends mark tone

R - Receive

S Send space tone

T Sends square wave tone

- + Adjust XMITL while transmitting

X exit

Enter T and adjust -+ to acheive 2.75 Khz and X to exit.

At the CMD: type XMITL enter and it will show CMD: XMITL ???

---

SETTING THE DEVIATION LEVEL IN RMS EXPRESS

Once you have the deviation level for your Radio/TNC combination

you need to enter the XMITL ??? into the Transmit Level box (highlighted below)

After you set the Transmit level  

Tick the box "Disable the Xmt Level Adjust".