Automatic Modem Selector
ASM Modem Selector is a device enabling communication of the VSAT terminal with three satellite modems operating in the L band frequency range (950 MHz to 2150 MHz) and it comes in two versions:
A - with a high-stability 10 MHz reference generator
B - without the 10 MHz reference generator
The VSAT terminal and the modems are connected to the N-type connectors located on the rear part of the selector enclosure. Additionally, the version with the 10 MHz reference generator is equipped with a power supply socket (230V 50/60 Hz). The version without the reference generator is a passive device that does not require power.
Characteristics |
|---|
VSAT terminal operation with three satellite modems |
Operation in the L band frequency range (950 MHz to 2150 MHz) |
| Dimensions | 482,1 x 44,1 x 250 mm |
|---|---|
| Weight - version A with a 10 MHz reference generator | 3,4kg |
| Weight - version B without the 10 MHz reference generator | 2,8kg |
| Operation in the L band frequency range | 950 MHz to 2150 MHz |
sockets for connecting the VSAT terminal (Tx - output of the TX signal to the BUC and optionally the 10 MHz reference signal, Rx - Rx input of the signal from the LNB)
sockets for connecting the TX outputs of modems 1-3
sockets for connecting the RX inputs of modems 1-3
Each of the MODEM [Tx] inputs enables transfer to the Tx output of a 10 MHz signal (also in the version with the reference signal generator) so special attention should be paid to the configuration of the satellite modems in this range
On the front panel of the Modem Selector there are measurement sockets (N-type) enabling monitoring of TX and RX signals
950-2150 MHz and 10 MHz
8.5 dB +/- 1 dB
<20dB
"N" 50 Ω
10 MHz
+7 dBm +/- 1 dB
<3 x 10-9 in the range -20°C to +70°C
<1 x 10-11
8 min. from power-on
10 Hz: 130 dBc/Hz 100 Hz: 145 dBc/Hz 1 kHz: 155 dBc/Hz 10 kHz: 158 dBc/Hz 50 kHz: 160 dBc/Hz