ALERT2 Repeater/Concentrator - 330X Series
ALERT2 Repeater/Concentrator - 330X Series

 

 

FEATURES:

 

  • Receives and Forwards ALERT2 Data
  • Programmable
  • Optional Sensor Inputs
  • Can be Equipped to Receive ALERT

 


 

DESCRIPTION:

The High Sierra Electronics, Inc. 330X Series of ALERT2 Repeaters/Concentrators supports ALERT2, the next generation of wireless communication protocol for use in real-time hydrologic monitoring systems.

The ALERT2 Repeaters/Concentrators receive and re-transmit ALERT2 data. Many configurations add concentrator capability which means that the ALERT2 Repeaters/Concentrator will also receive Legacy ALERT data and re-transmit it as Concentrated ALERT as defined within the ALERT2 Protocol.

HSE offers ALERT2 Repeaters and Repeater/Concentrators in three different types of enclosure with a variety of options available in each of the different enclosures.

      ALERT2 Repeaters/Concentrators rack mount unit - front
ALERT2 Repeaters/Concentrators rack mount unit - front

 

      ALERT2 Repeaters/Concentrators rack mount unit - back
ALERT2 Repeaters/Concentrators rack mount unit - back

 

The ALERT2 Repeaters/Concentrator - Model 3302 is a 2U Rack Mount enclosure for mounting in equipment racks common at mountain top repeater sites. The ALERT2 Repeaters/Concentrator - Model 3303 is in a similar 2U metal enclosure suitable for use in a HSE Telemetry Cabinet and the Model 3304 is provided in an 8 inch (20.3 cm) canister and suitable for standpipe installations.

One of the great advantages of the ALERT2 Protocol is the use of TDMA (Time Division Multiple Access). This allows a network design that assigns specific time slots for data transmission for every gauge and ALERT2 repeater. The result is virtually no data loss due to data collision which is a common occurrence in larger ALERT systems.

For existing ALERT Systems transitioning over time from Legacy ALERT to ALERT2 a Repeater will also need to operate as a Concentrator. This can be accomplished either through the inclusion of an internal ALERT receiver/decoder, or the Legacy ALERT data can be imported via serial cable from an existing ALERT repeater if it is equipped with a serial output stream. If the ALERT receiver is internal the Repeater/Concentrator will be equipped with three radios; one to receive ALERT2, one to receive Legacy ALERT, and a third for ALERT2 data re-transmission. When the system design permits half duplex, then a single radio can receive and re-transmit ALERT2 messages.

The ALERT2 Repeater/Concentrators include an Ethernet port. Data can be exported by the ALERT2 Repeaters/Concentrators via the Ethernet port to any Ethernet ready device such as a router or cell modem for transmission to the system base station.

Any ALERT2 Repeaters/Concentrator that includes internal Legacy ALERT concentration capability also offers the availability of sensor inputs. The range of sensor inputs is identical to the sensor range of the HSE Models 3306, 3316, and 3512.

Power requirements vary depending on the ALERT2 Repeaters/Concentrator configuration and the anticipated volume of data to be re-transmitted. Most sites will operate effectively with a 75 Watt Solar Panel and 36 Amp Hours of battery capacity (usually multiple 12 Ah batteries) but a High Sierra Electronics Applications Engineer can calculate the required power system given the specifics of your site.


 

SPECIFICATIONS:

Data Format ...........................   ALERT2 (Some models also receive ALERT)
Data Output ...........................   Serial port female DB9 connector
Serial Data Rate ...........................   19,200 BAUD, 8 Data Bits, 1 Stop Bit, No Parity
Frequency Range ...........................   VHF 135 - 174MHz
Switch Selectable ...........................   Define up to eight frequencies when ordering unit
Squelch ...........................   Open for ALERT2, Squelch for Internal ALERT receive
Radio Type ...........................   Ritron DTXL
Operating Voltage ...........................   12 to 18 VDC
Current Draw ...........................  
Fuse ...........................   3 Amp
Connectors
     Receive Antenna ...........................   SO-239
     ALERT2 Transmit Antenna ...........................   BNC Female
     Ethernet ...........................   RJ45
     Power ...........................   Two 3-Pin MS connectors (one for power source & one for external back-up battery)
     Demod & Encoder Console ...........................   9-Pin serial male
     Serial In ...........................   9-Pin serial male (for ALERT option)
Enclosure ...........................   Aluminum box with external connectors
Operating Temperature ...........................   -22° to 122° F (-30° to 50° C)
Dimensions ...........................   13x3.75x14.5 inch (33x9.5x36.8 cm) (For Model 3302-IFPSN)
Weight ...........................   12 Lbs (5.4 kg) (For Model 3302-IFPSN)
Shipping Weight ...........................   17 Lbs (7.7 kg) (For Model 3302-IFPSN)

 

ORDERING GUIDE:
HSE Warranty
General Terms and Conditions



      ALERT2 Repeaters/Concentrators Ordering Guide
ALERT2 Repeaters/Concentrators Ordering Guide

 

For example, a 3302-IFNSN would specify a Receive antenna split between ALERT and ALERT2 Receivers, operating in full duplex without a Power Amp or Receive Crystal Filters in a rack mount chassis.

ORDERING GUIDE NOTES:

Each Model number includes a five letter suffix indicating the exact configuration of the unit.

The first letter in the suffix indicates whether or not the unit is equipped to receive and decode Legacy ALERT data. An “I” indicates that the unit has an internal receiver / decoder dedicated to receiving and decoding Legacy ALERT data for re-transmission as Concentrated ALERT following the ALERT2 Protocol. An “S” in the first position indicates that Legacy ALERT data will be ingested from an external source via a serial connector on the enclosure. An “N” indicates that the unit is not ingesting Legacy ALERT data and serves only as an ALERT2 Repeater.

The second letter in the suffix indicates whether the Repeater/Concentrator will operate in full or half duplex mode. Full duplex means that the Repeater/Concentrator will receive and transmit simultaneously. This mode requires at least a 1 MHz separation between the transmit and receive frequencies and adequate vertical separation between the transmit and receive antennas. Half duplex means that the unit will not receive while transmitting. In most ALERT2 Systems the use of TDMA time slots will enable all the data throughput needed in half duplex mode. An “F” in the second position indicates full duplex and an “H” indicates half duplex.

The third letter in the suffix indicates whether or not the unit has a power amplifier. A “P” in this position indicates that a power amp is installed and an “N” indicates that there isn't.

The fourth position in the suffix indicates whether or not an antenna splitter or multi-coupler is in use. These devices allow two receivers to utilize a single receive antenna. The splitter is a passive device that does not draw any power but does introduces a minor amount of signal loss. While the multi-coupler does not introduce any signal loss it does draw power and therefore most commonly used at AC powered sites. An “S” in the fourth position indicates a splitter is included, an “M” indicates that a multi-coupler is in use and an “N” indicates that neither is used.

The fifth and last letter of the suffix indicates whether or not a Crystal filter(s) is installed. Crystal filters are used in noisy radio environments that can be found at many mountaintop repeater sites. It should be noted that Crystal filters do induce some signal loss on the incoming signal and in some cases adequate filtering can be accomplished with external band pass cavity filters that lower signal losses. A “C” in the fifth position of the suffix indicates the presence of a Crystal filter(s) and an “N” indicates that no Crystal filter is in use.


 

RELATED PRODUCTS:

1002 Series ......... ALERT2 Demodulator
Model 3306-02 ......... ALERT/IFLOWS Data Transmitter with ALERT2 Format
Model 3316-02 ......... IFLOWS/ALERT Data Logger with ALERT2 Format
Model 3324-02 ......... ALERT2 Rain Gauge Data Transmitter Upgrade Kit
Model 3800 ......... Power Amplifier
Model 7110-00 ......... 3dB Gain Omni-Directional Antenna


 

SUPPORT:

ALERT2 Repeater/Concentrator - Model 3302: Datasheet