Genesys GDR- COM Series, Руководство по установке, Страница: 51 / 62

GDR-XXXX NAV/COMM INSTALLATION MANUAL
64-000109 Page 51 of 62
29. ARINC Labels 030 and 047, VHF COM
Labels 030 or 047 determine the frequency of the VHF COM and both labels are accepted by
the radio. Only the label received by the radio shall be retransmitted, e.g., if radio 030 is
received by the LRU, it will be transmitted without label 047 and vice versa. Label 030 shall
be used for 25 kHz channels, while 047 shall be used for 8.33 kHz spaced channels. Both
labels contain the channel name rather than frequency as per channel labeling scheme in
ARINC 716, which is listed in Appendix A for reference.
The example shown below is for channel 118.000, which also has a frequency of 118.000
MHz and sets the receive bandwidth required for reception of a 25 kHz channel. Channel
118.005, has a frequency of 118.000 MHz and sets the receive bandwidth required for
reception of an 8.33 kHz channel.
Table 12: VHF COM 118 MHz Frequency with 25 kHz or 8.33 kHz channel bandwidth
Function
L
ab
el
P
a
rit
y
(
odd)
S
ign/S
ta
tu
s
M
at
ri
x
10 MHz
(1)
1 MHz
(8)
0.1 MHz
(0)
0.01 MHz
(0)
0.001 MHz
(0)
Res
(SDI)
LABEL
VHF COM FREQ.
Octal
LSB MSB
1 2 4 1 2 4 1 2
Bit # 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
25 kHz 030 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0
8.33 kHz 047 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 1 1 0 0 1 0 0
Table 13: Sign Status Matrix definition and SDI bit definition
Bit
31 Bit
30 Status SDI Bits
10 9
Radio Number
0 0 Squelch Normal 0 0 All Call
0 1 No Computed Data 0 1 COM 1
1 0 Functional Test 1 0 COM 2
1 1 Squelch Open 1 1 COM 3
Notes: 1. The SSM matrix defines a bit configuration binary 10 for “Functional Test”, which
shall initiate any COM IBIT, unless the NAV receiver is in the ILS mode.
2. A received SSM of 11 opens the receiver’s squelch. A SSM returned from the unit
indicates the squelch is opened by either a received signal or the RMU. This can
be used as a means to indicate channel activity.
3. The LRU shall use the SSM matrix of labels 030 and 047 to annunciate any corrupt
or invalid data associated with the label by setting the SSM to NCD on the
retransmitted word. LRU failures are reported on label 350.
4. The channel number’s hundreds place both have a default value of “1”, i.e., they
have 100 MHz added to the sent number.