Aar Channel Selection - Ritron RCCR Owner's Manual

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AAR Channel Selection

CHAN
The CHAN button is used in conjunction with the numeric keypad to select AAR channels:
•
03 - 97 for Wide Band (25 kHz) operation
•
005 - 097 for Narrow Band (12.5 kHz) operation
•
104 - 197 for Narrow Band (12.5 kHz), 7.5 kHz Offset operation
•
302 – 488 for Digital (6.25 kHz) operation
Refer to chart "AAR Channels" on page 31 for the complete list of AAR frequencies available with the
CHAN button. Note that wide band channels 05-97 are the same frequency as the corresponding
narrow band channels 005-097, only the operating bandwidth is different. 7.5 kHz offset, narrow band
channels 104-197 operate the transmitter and the receiver on a frequency 7.5 kHz higher than the
selected AAR channel. For example, wide band channel 12 and narrow band channel 012 both
operate at 160.290 MHz while narrow band offset channel 112 operates 7.5 kHz above channels 12
and 012 at 160.2975 MHz.
Mixed Bandwidth
When entering AAR channel pairs the TX and RX frequencies must use the same bandwidth. It is not
possible to enter a mixed wide/narrow band TX/RX pair. For example, if the TX frequency is entered
to operate Wide Band and the RX frequency is entered to operate Narrow Band the radio will not allow
it and revert to the last valid channel entry.
Invalid Channel Entries
If an invalid AAR channel entry is attempted "INVALID" will momentarily show across the top of the
display and no changes will be made.
When selecting an AAR channel, the maximum delay between digit entries is 2 seconds
(programmable, factory value). If the 2 seconds between digits is exceeded the radio will:
•
Revert back to the last valid entry if digits entered up to the point of the delay were not valid.
•
Operate on the channels specified by the digits entered up to the point of the delay if they are
valid. For example, you intend to enter channel 11 for TX and 21 for RX but delay after
rd
entering the 3
digits entered (112) are a valid Quick Entry channel.
Non-AAR Channels
Valid AAR channels are 03-97, 005-097, 104-197 and 302-488 per chart "AAR Channels" on page 31.
Any other channel entry must be made via a HOME channel. See the section "Home Channel
Selection" for details on the programming and use of HOME channels.
CTCSS or DCS Tone Squelch
AAR channel selection using the CHAN button is carrier squelch only. If CTCSS or DCS is required
the channel must be selected via a HOME channel entry. See the section "Home Channels" for
details on the programming and use of HOME channels.
DTMF Sequences or Single-Tone
If a DTMF sequence or a Single-Tone is displayed at the time an AAR Channel entry is made, it will be
retained after the new channel is selected. See sections "DTMF Tones", "Single-Tone" and "DISP
Button" for instructions on the use of DTMF sequences and Single-Tones.
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OPERATING THE RADIO
digit. The radio will be set to operate on 112 TX and 112 RX because the 3
Ritron RCCR Clean Cab User Manual 4