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LBI-38953
Push-To-Push (PTT)
When the Push-To-Talk button on the side of the handset
is pressed a serial character is sent to the radio. The handset
reports when PTT has been pushed and also when PTT has
been released. PTT keys the radio.
THREE KEY FUNCTION TESTS
The following tests require that a three key format be
entered.
Transmitter On (FCN 0 1)
The FCN 0 1 function checks the lock detect line of the
synthesizer and displays [UNLOCK] if the synthesizer is out
of lock. Otherwise the radio displays [XMITON]. The trans-
mitter is keyed at the specific frequency or channel regard-
less of whether the radio is in the "locked" condition. The
transmitter will remainkeyed and the IN USE status indicator
displayed until any key is pressed. This function allows the
user to not have to press the PTT button continuously during
testing.
During normal operation an UNLOCK condition
prohibits the transmitter from being keyed.
Receive Audio On (FCN 0 2)
The FCN 0 2 function displays [RXAUDON] and turns
the received audio on regardless of the carrier tone detect
status.
Receive Audio Off (FCN 0 3)
The FCN 0 3 function displays [RXAUDOF] and turns
the received audio off regardless of the carrier tone detect
status.
Microphone Audio On (FCN 0 4)
The FCN 0 4 function displays [MICAUDON] and
transmits the signal present on the mic audio path during
transmit.
12
NOTE
Microphone Audio Off (FCN 0 5)
The FCN 0 5 function displays [MICAUDOF] and
disables the mic audio path during transmit.
Transmit Standard Busy Tone (FCN 0 6)
The FCN 0 6 function checks the lock detect line of the
synthesizer and displays [UNLOCK] if the sytnesizer is out
of lock. Otherwise the radio will display [STDBSYON]. The
transmitter is keyed regardless of an "unlock" condition and
continuously transmits the 3051.6 HZ standard busy tone.
Pressing any key unkeys the transmitter.
Transmit Alternate Busy Tone (FCN 0 7)
The FCN 0 7 function checks the lock detect line of the
synthesizer and displays [UNLOCK] if the sytnesizer is out
of lock. Otherwise the radio displays [ALTBSYON]. The
transmitter is keyed regardless of an "unlock" condition and
transmits the 2918.7 HZ alternate busy tone. Pressing any
key unkeys the transmitter.
Transmit GE-MARC Tone (FCN 0 8)
The FCN 0 8 function prompts the user for the GE-
MARC tone to be transmitted with the [TONE?] The user
then enters the number 00-42 of the GE-MARC TONE
(00-42). If the tone specified is valid the radio checks the
synthesizer lock and then imediatley keys the transmitter and
sends the tone (even if an "unlock condition exist). If tone
00 is specified the radio will transmit microphone audio only.
Pressing any key unkeys the transmitter.
Manual Channel Increments (FCN 0 9)
The FCN 0 9 function increments the channel number
and loads the synthesizer. The radio will then display the
number of the channel loaded i.e. [CHAN0340] = channel
340.
Across Band Switching (FCN 1 0)
The FCN 1 0 functiondisplays [SYNTOGLE] and con-
tinuously toggles the synthesizer between the first and last
channels in the band (806.0125 MHz and 825.9875 MHz).
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