TIMTER
™ Multi
-mode Dual
Telemetry Transmitter
11
Quasonix, Inc.
Table 11: Standard Bit Rates Compared to Low/High Rate Options
Standard Bit Rate
With Low Rate Option
-LR
With High Rate Option
-HR
ARTM Tier 0 Modulation
(PCM/FM)
0.05 -14 Mbps
Down to 0.025 Mbps
Up to 23 Mbps
ARTM Tier I Modulation
(SOQPSK-TG)
0.1
—
28 Mbps
Down to 0.050 Mbps
Up to 46 Mbps
ARTM Tier II Modulation
(Multi-h CPM)
0.1
—
28 Mbps
Down to 0.050 Mbps
Up to 36 Mbps
Legacy Modulation
(BPSK)
0.05
—
10 Mbps
N/A
N/A
Legacy (QPSK, OQPSK)
0.05
—
20 Mbps
N/A
N/A
1.3.21 Internal Clock and Data Option
–
ID
The ID option allows the CS and DS user settings to be reloaded on power up or on a manual recall of a setup.
Without the ID option, CS and DS are both forced to 0. Refer to the CF option for information about the Clock Free
option.
1.3.22 Limited Current Option
—
LC
This option is used to specify low current in the RF Off state. Current draw is less than 10 mA when the transmitter
is Off. This is a hardware option.
1.3.23 Forward Error Correction / Low Density Parity Check (LDPC) Option
–
LD
This option provides the Low Density Parity Check (LDPC) encoding, which is being considered for use on the
iNET program. LDPC has been adopted by the Range Commander’s Council, IRIG 106
-17, Appendix 2-D.
1.3.24 Forward Error Correction / Low Density Parity Check (LDPC) Option
–
LD6
This option adds the extended LDPC option to the unit. It lets the user select from the six implemented LDPC codes,
and allows the randomizer command to select the CCSDS randomizer, if LDPC is enabled. Adding this option
automatically enables the existing LD option.
The IRIG standard calls out six variants of LDPC codes
—
all combinations of two different information block sizes
(k=4096 bits and k=1024 bits) and three different code rates (r=1/2, r=2/3, and r=4/5).
K=4096, r=1/2
k=1024, r=1/2
k=4096, r=2/3
k=1024, r=2/3
k=4096, r=4/5
k=1024, r=4/5