3-8
(2)
Hold the microphone in one hand, with the upper edge of the microphone as close as
Possible to the upper lip.
NOTE
This technique activates the noise cancelling feature of
the microphone. The microphone is most effective
when sound is ½ inch (12.7 mm) or more away from
the microphone.
(3)
Press and hold the PRESS-TO-TALK switch of the microphone during transmission.
(4)
Ensure that the Tx ON amber LED is ON.
(5)
Speak slowly and distinctly into the microphone using specified operating procedures
during transmission.
(6)
When message is ended, release the PRESS-TO-TALK switch of the microphone.
(7)
The transceiver is now operating in the receive mode.
(8)
Verify that the Tx ON amber LED is OFF.
(9)
Refer to paragraph 3.4 for Front Panel Keypad Operation and additional Operating
modes.
3.3.3 Receiver Operation
To operate the transceiver in the receive mode, proceed as follows:
(1)
Ensure that the PRESS-TO-TALK switch on the microphone is NOT depressed, and
verify that the Tx ON amber LED is OFF.
(2)
Verify that the correct operating frequency is displayed on the liquid crystal display
(LCD). Refer to Front Panel Keypad Operation, paragraph 3.4 for Channel/Frequency
selection.
(3)
Adjust the SQUELCH control to suit local reception conditions. When the SQUELCH
control is rotated in the counter-clockwise direction, the SQUELCH indicator green LED
will switch to ON, indicating that the squelch circuit is connecting the demodulated
audio output to the VOLUME control.
Further adjustment of the SQUELCH control determines the squelch setting.
IMPORTANT NOTE
The dual conversion receiver’s squelch knob must be rotated significantly more
clockwise (4 o’clock position) to obtain the same squelch setting (3uV) as a single
conversion receiver’s squelch knob set to the 12 o’clock (straight up) position.
If the dual conversion receiver’s squelch knob is set to the 12 o’clock position, signals
with a level greater than 0.5uV will open the squelch. At most airports this will not be
an adequate level of squelch.
Summary of Contents for TiL-91-DE/S
Page 6: ...1 2 Figure 1 1 TPS 250 Portable Transceiver General View Closed Open View...
Page 7: ...1 3 Figure 1 2 Transceiver Front Cover Assembly...
Page 14: ...2 2 Figure 2 1 Battery Installation and Removal...
Page 18: ...2 6 Figure 2 2 Fixed Channel Jumper Locations...
Page 20: ...2 8 Figure 2 3 Remote Operation Jumper Locations...
Page 25: ...3 2 Figure 3 2 Transceiver Front and Rear Panel Layout...
