TOC

CV4400 ASR-9 ARTCC Converter, ASR-9 Formatter

The CV4400 converts ASR-9 into CD format data.

CV4400 formats

CD2 full-scan,
All ASR-9 native ASTRIX data is converted to CD format and provided at full ASR-9 scan rate.

CD2 skip-scan,
All ASR-9 native ASTRIX data is converted to CD format and provided at 1/2 ASR-9 scan rate by "skipping a scan"

CD–ASR

from FAA network you can get the user guide for ECG here; ​http://trac.tgf.tc.faa.gov/projects/tgf/attachment/wiki/EcgDocs/TI_6100.16A-ECG_UserManual20120302.pdf

To address the incompatibilities between short-range radar and enroute surveillance data processing, and
to address usability of CV4400 format converter output data with DARC, the conversion function formally
done by CV4400 hardware is now a software function within ECG.

...

This excerpt references a HOST/DARC configuration for ECG

1. If a site utilizes a CV4400 converter, that converter is reprogrammed to provide CD2 full-scan data to ECG. The PIP then converts that data to CD2 skip-scan data for use by HCS. The BIP, however,
does not need to do any conversion since DARC can utilize CD2 full-scan data. Refer to Figure 3–302, CV4400 Conversion Enabled in PIP and Disabled in BIP (with CV4400 Hardware).

RADAR sepadapt entry from c140un0

 <CDRADAR
            DEVICE_NAME="PHL-3"
            LDA1="0x17A"
            PROCESSOR="zcyappipa"
            SLOT="3"
            PORT="1"
            RADAR_CHANNEL="3"
            RADAR_ID="11"
            SITE_NAME="PHL"
            RADAR_TCP="YES"
            INVERT="NORMAL"
            MULTICAST="DISABLED"
            PROTOCOL="ASR9_RADAR">
        </CDRADAR>

   <Site
            SITE_NAME="PHL"
            RADAR_ID="11"
            CV4400="ENABLED"
            CV4400_RADAR_ID="11"
            CV4400_SCAN_TIME="4618"
            CV4400_TO_LAN="ENABLED">
   </Site>

PROTOCOL="ASR9_RADAR"

 ASR9_RADAR (ASR-9)
This is selected when the incoming data is from an ASR–9 short range radar that is delivering
CD–ASR format data to ECG. This protocol would typically only be selected when the ASR–9 radar
does not have CV4400 hardware filtering/formatting equipment (as with new ASR–9 radars).

MULTICAST="DISABLED"

With ECG/DARC, this parameter is used to enable or disable the multicasting of radar data before the
data is processed by the CV4400 filtering/formatting function in ECG (RAPPI and DARC are multicast
users). If it is desired to multicast radar data to RAPPI and DARC prior to it being processed by the ECG
CV4400 filter, then the multicast parameter should be set to ENABLED for each radar device for which
multicast is desired. The default for multicast for the radar device is DISABLED.

INVERT="NORMAL"

This parameter is set according to the compatibility of the incoming data signal relative to MIL-STD-188.
If invert is set to INVERTED, then ECG software inverts the polarity, treating an incoming 0 (zero) as
a logical 1 (one) and a 1 (one) as a logical 0 (zero). If INVERT is set to NORMAL, then no inversion
is performed. The default ECG SCT setting is INVERTED. This parameter is set in the device details
window of the SCT.
Note:
This parameter may not need to be set to NORMAL for short range (ASR) radars that do not
send data in conformance with MIL-STD-188.

CV4400="ENABLED"

This adaptation parameter is the main toggle for selecting whether the incoming radar data (for a given
radar) is to be processed by the CV4400 filtering/formatting function in ECG. The default for ECG CV4400
is DISABLED. If ECG CV4400 filtering is desired, then this parameter must be changed to ENABLED

When the ECG CV4400 filter is enabled, additional subparameters must also be set to support the ECG
filtering/formatting functionality. The adaptation specialist that is setting up the adaptation for a given site
must have access to the configuration data sheet for the short-range radar to be adapted. The data sheet
facilitates selection of the appropriate values for CV4400–related parameters within the ECG SCT. Most
of the other parameters discussed in subsequent subsections address how data from one message type
(i.e., ASR–9) is to be converted for CD2 output (full-scan or skip-scan, depending on adaptation).
If CD2 output is not desired, the ECG CV4400 parameter is left DISABLED. The output to
HCS/ECG/DARC is whatever the radar site is sending. (Host must receive CD2 skip-scan format data
from short-range [ASR] radar).

CV4400_SKIP_SCAN Note: The example <Site> element does not contain this parameter, so the default will be applied i.e. no skip scan. A sepadapt supporting host (HCS) would need this ENABLED

This parameter is used to enable or disable the ECG CV4400 filter that performs removal of every other
scan of incoming radar.
The CV4400_SKIP_SCAN parameter is disabled as the default and is set appropriately for the desired
output to Host/ECG/DARC. If the CV4400 parameter is enabled and the CV4400_SKIP_SCAN parameter
is enabled, then Host/ECG/DARC receives the CD2 skip-scan format data it requires. 

CV4400_TO_LAN="ENABLED"

This parameter is used to enable or disable the multicasting of radar data after the radar data has been pro-
cessed (by) the CV4400 filtering/formatting function in ECG. This parameter should be enabled for ECG/DARC
when it is desired to send short-range radar data (that has been processed by the ECG CV4400 con-
version software) to the multicast for the DARC and RAPPI clients to receive. The default is DISABLED.