field programming a tk-270?

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dirtslinger
Posts: 55
Joined: Sat May 20, 2006 12:09 am
Location: Sumner Iowa

field programming a tk-270?

Post by dirtslinger »

Does anyone now how to enable field programming on a tk-270 DTMF?
n5tbu
Posts: 413
Joined: Fri Aug 30, 2002 7:20 am
Location: Opelousas,La.

Re: field programming a tk-270?

Post by n5tbu »

To place unit in programming mode: With power OFF, hold down the ! button (upper side button above PTT (Push-To-Talk) key with a square molded on it) with left index finger and the DIAL button with left thumb. Turn on unit. Hold buttons down until SEL appears on the display. Release buttons. Press TA button. CH 1 will appear in display. Unit is now in programming mode.

To program (change) frequencies in any of the 32 channel positions: Use the rotary channel selector knob to scroll to the desired channel position (CH 1 through CH 32). Press the PTT key on the left side of the unit. The channel's receive frequency will be displayed. To change the frequency in small increments: use the rotary channel selector knob to move up or down.
To change the frequency in 1 MHz (large) increments, press and hold the ! button and use the rotary channel selector knob to scroll up or down in 1 MHz increments. The same method is used to alter transmit frequencies.

Programming sequence 'positions' for each channel (controlled by pressing the PTT key while in programming mode and on the desired channel). Repeated PTT pressing is known as scrolling.
1st - press of the PTT key - Receive frequency,
2nd - Receive tone,
3rd - Transmit frequency, 4th - Transmit tone,
5th - (off),
6th - (off),
7th - Channel in/out of scan list (Add or dEL),
8th - (off),
9th - (off),
10th - Transmit power (H) = high.

Tones - sub-audible tones are used to eliminate the reception of undesired signals or to allow access to specific repeater sites (tones 1 through 8, listed on channel card). Displayed numbers are the tone frequency, in Hz (cycles per second).

To program/modify tones: while tone status is displayed (by scrolling to position 2 for receive tone or 4 for transmit tone) in the programming sequence, either rotate the channel selector knob until the desired tone is displayed or use the LO key to turn the tone function OFF or enable the programming of the tone function (display the tone) from OFF. Note: The display of 023 is not a valid tone and should be scrolled past and not be used.

To leave programming mode, use the PTT key to scroll until CH 1 through CH 32 or OFF is displayed. Turn radio off. Unit is ready to be used when it is turned on again.

Non-Programming mode Functions

To add or delete a channel from the scan list: scroll to the desired channel (using the rotary channel knob). Press and hold the lower side button (below the ! button) and press the SCN button. Release the buttons. A small "A" displayed above the channel number indicates that the channel is in (added) to the scan list.

Squelch adjustment: To increase the squelch level (to eliminate interference) or lower the squelch level (to receive weak transmissions), first ensure that the .scan mode is off. Press and hold down the lower side button (below the ! button) and then press the LO button. Release the side button. Unit is now in squelch adjustment mode (with SqL displayed). Squelch level is from 0 (unsquelched) to 9 (full squelch). 4 to 6 is normal range. Use rotary channel selector knob to scroll to desired setting. Pressing the LO key will exit the squelch adjustment mode.

To enter the 'car-to-car' (direct/talk-around/non-repeater) mode, press the TA button. tA (and the channel number) will be displayed. To exit, press the TA button again.

To illuminate the display window: press the ! button. Press the button again to turn the lamp off.

mod
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