Frequently Asked Questions

1. Which interface levels are supported by the SATELLINE-EASy / -EASy 869 / TR1 / TR1-869?
2. I have a SATELLAR-1DS/10DS in the Source Routing Mode. Can I do data and NMS monitoring simultaneously?
3. What should be taken into account when configuring SATELLAR network with repeater stations running in the Packet Mode?
4. Why the Basic mode (sometimes referred to as transparent mode) is not working in SATELLAR?
5. What do I need to take into account about configuring SATELLAR-2DS to synchronize its time from NTP server?
6. I need a RS-485 as a part of my or my customer’s SATELLAR solution. What do I need to take into account?
7. What is the end-to-end latency of the SATEL I-LINK 100 communication? How fast is the command from I-LINK 100 to another one?
8. How to get RSSI and SNR values from SATELLAR radio network via WEB browser?
9. Channel spacing vs. channel width
10. 868 ... 869 MHz frequency range duty cycle limitation, what does that mean?


Q1: Which interface levels are supported by the SATELLINE-EASy / -EASy 869 / TR1 / TR1-869 ?

A:

RS-232
RS-422
TTL
LVTTL
RS-485
EASy
X
X
**

**

TR1
X
X
X
X
EASy 869
X
X
TR1 869
X
X
X
X

*For the RS-485 operation, the port2 must be configured by the user to RS422 mode and then take care of the termination by the external cable or adapter. The difference of NARS2 and CRS-PB is that NARS2 provides two wire connectivity (4-wire for RS422), whereas the CRS-PB provides D9 connectivity.
** Must be ordered separately
The wiring diagram of the external adaptation for RS-485
The YC0485 (NARS2) wiring diagram
The CRS-PB (YC0501) wiring diagram


Q2: I have a SATELLAR-1DS/10DS in the Source Routing Mode. Can I do data and NMS monitoring simultaneously?

A: If your modem has the physical serial port in mode  RS-232, you can connect an Y-cable (YC0500) to the port and have both, data and NMS monitoring, at the same time. If the port is supporting RS-422/RS485, this is not possible.
Read the full answer.


Q3: What should be taken into account when configuring SATELLAR network with repeater stations running in the Packet Mode?

A: All repeater stations can be SATELLAR-1DS, if they only repeat the received data to the next station (and do not for example forward IP packets to other networks or do Serial IP functions). Forwarding via repeaters is done based on Packet Routes and RMAC addresses and processed by the RU.
The Routing / IP / IP Header Compression  must be switched to "OFF" for all modems in the network.
The Modem Settings / Packet Mode Radio Access Control / Network Topology must be set to "Repeater" in all modems in the network.
Consider also the effect of the added station to the overall end-to-end latency and the automation protocol used.


Q4: Why the Basic mode (sometimes referred to as transparent mode) is not working in SATELLAR? Radio is not transmitting the data it is receiving from the serial port.

A: With the Central Unit (CU) firmware version 1.3310 and earlier and (Radio Unit) RU firmware version 5.5.0.0 or earlier, set the Modem Settings / Packet Mode Radio Access Control / Training Sequence Length to value “Full”. In newer versions (when available), you are able to enable the basic mode regardless of the Training Sequence Length parameter.


Q5: What do I need to take into account about configuring SATELLAR-2DS to synchronize its time from NTP server?

A: Follow the steps listed here:

1. Set the SATELLAR modem time manually as close to actual date and time as possible:

a. select Modem Settings/Time Control/Time Operation Mode to value “Manual Time Operation
b. set the correct date and time to Time field
c. commit the changes. This will cause SATELLAR to reboot.

2. Configure the NTP operation:

a. select Time Operation Mode to value “NTP Time
b. set the NTP Server Address and adjust the synchronization interval if needed by the setting NTP Interval.
c. make sure you have the IP connectivity available from SATELLAR to the NTP server.
d. commit the changes. This will cause SATELLAR to reboot.

After the reboot, the NTP time synchronization will start.


Q6: I need a RS-485 as a part of my or my customer’s SATELLAR solution. What do I need to take into account?

A: Always contact SATEL Technical Support before ordering modems with RS-485 support.


Q7: What is the end-to-end latency of the SATEL I-LINK 100 communication? How fast is the command from I-LINK 100 to another one?

A: This depends slightly on the used radio modem as well as whether you have repeater in the network or  not. Please see the following PDF for details.


Q8: How to get RSSI and SNR values from SATELLAR radio network via WEB browser?

A: 1. Enter the WEB user interface of SATELLAR
2. Go to Tools -tab -> NMS Value
3. Enter the value / values to fetch from the radio modem:
- 1.111 for current RSSI value
- 1.122 for current SNR value
4. Set the RMAC address that the values are fetched from
5. Press the "Get Values Repeatedly" and wait for reply
6. Check that the readings are in the required levels

Read the full answer.


Q9: Channel spacing vs. channel width

Channel spacing: Defines the frequency difference between adjacent radio channels in the radio modem.
Channel Width: Occupied channel bandwidth. Typically channel spacing is the same in the radio modems as the channel width.

Channel Spacing (width) with Satel products:

  • SATELLINE-3AS product family (SATELLINE-3AS, -3AS Epic, -3AS Epic Pro, -3AS NMS, -3AS Epic NMS, -3AS VHF) => always fixed, 25, 20*, 12.5 kHz
  • SATELLINE-EASy product family (SATELLINE-EASy, -EASy Pro, -M3-TR1, SATEL Compact-Proof and EASy-Proof) => Adjustable 25, 20*, 12.5 kHz
  • SATELLAR XT 5R / 5RC products => Adjustable 150, 25 and 12.5 kHz
  • SATELLINE-M3-R3 / -TR3 / -TR4 products => Adjustable 25, 12.5 kHz

In the context of Satel radio modems channel spacing defines also the width of the radio channel. *) The only exception is that SATELLINE radio modems with 20 kHz channel spacing uses 12.5 kHz channel width. 

Read more.


Q10: 868 ... 869 MHz frequency range duty cycle limitation, what does that mean?

The duty cycle is defined as the ratio, expressed as a percentage, of the maximum transmitter “on” time monitored over one hour, relative to a one hour period. The purpose of the duty cycle limit is to ensure that no single application can occupy this license-free band for more than a certain percentage of time. 

Read the full answer.

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