JRC JQE-103 - Electrical Specs: 406 MHz & Digital Message; 406 MHz Transmission Specs; Digital Message Specifications

5-2
B) Electrical specifications
B-(1) 406 MHz
Long-time stability 406.028 MHz (within +2 kHz, -5 kHz)
Frequency stability
Short term : Less than 2 x 10
-9
/100 ms
Medium term
Mean slope : Less than ±1 x 10
-9
/min.
Residual frequency variation : Less than 3 x 10
-9
Output power Less than 5 W ±2 dB
Transmitting spurious
Intensity of unwanted radiation during modification is shown below.
Data encoding Bi-phase L
Modulation method Phase modulation (PSK : G1B)
Phase deviation ±1.1 ± 0.1 radian (peak value)
Rise in modulation 50 μs to 250 μs
Antenna polarization Linear polarization
Antenna gain
-3 dBi to 4 dBi Elevation angle : 5° < < 60°
VSWR 1.5 or less
Impedance 50Ω
B-(2) Digital message
Repetition time of
transmission
47.5 to 52.5 sec. (random)
Transmission time 440 ms ± 1% (short message)
Digital message As setting
Bit rate 400 bps ± 1%
Bit synchronization All 15 bits are “1”
Synchronization frame 000101111
-24kHz
406.0MHz
Pc
-40
ｃdB
ｃ-35dB
-30
ｃdB
-20
ｃdB
ｃ
0dB
-20
ｃdB
-30
ｃdB
ｃ-35dB
-40
ｃdB
406.1MHz
-12
kHz
-7
kHz
-3
kHz
ｆｃ
3
kHz
7
kHz
12
kHz
-24kHz