iXBlue GAPS - Page 180

GAPS - User Guide
H.3 ITSTELEMETRY
$PTLMT
Data received: Telemetry
$PTLMT,T,bal,sig,nd
u
,d
u
k
*ck<CR> <LF>
$PTLMT,R,bal,sig,nd
s
,nq
s
,nd
u
,nq
u
,d
s
i
,…,q
s
j
,d
u
k
,…,q
u
l
,…*ck<CR> <LF>
Fields Values Description
bal -
Transponder ID
In T mode (transmit):
- If bal > 0 data is sent when the transponder is interrogated
- If bal ≤ 0 data is sent as soon as possible
In R mode (receive): bal is the ID of the transponder whose answer carries data
sig -
Carrier signal ID
In T mode (transmit):
- If sig > 0 data is sent when the carrier signal sig is transmitted
- If sig ≤ 0 data is sent as soon as possible
In R mode (receive): sig is the ID of the carrier signal
nd
s
{0, …, 4} Number of service data
nq
s
{0, …, 1} Number of service qualities
nd
u
{0, …, 20} Number of user data
nq
u
{0, …, 5} Number of user qualities
d
s
i
{00
hex
, …, FF
hex
} Service data with i ∈ {1, ..., nd
s
}
q
s
j
{0
hex
, …, F
hex
} Quality of service data with j ∈ {1, ..., nq
s
}
d
u
k
{00
hex
, …, FF
hex
} User data with k ∈ {1, ..., nd
u
}
q
u
l
{0
hex
, …, F
hex
} Quality of user data with l ∈ {1, ..., nq
u
}; 0: worst quality; F: best quality
ck {00
hex
, …, FF
hex
} NMEA183 string checksum
180 MU-GAPS-AN-005-H - November 2019