HCJB Global HCJB Global Voice DRM Voice DRM BroadcastsBroadcasts

Charles JacobsonCharles Jacobson

HCJB Global Technology HCJB Global Technology CenterCenter

Elkhart, INElkhart, IN

DRM from HCJBDRM from HCJB

Special even broadcasts – NAB, Special even broadcasts – NAB, NASB, DX events, etc.NASB, DX events, etc.

Regular broadcastsRegular broadcasts Europe – since May 2007Europe – since May 2007 Brazil – since January 2008Brazil – since January 2008

DRM from HCJBDRM from HCJB

EquipmentEquipment HCJB developed DRM Content Server and HCJB developed DRM Content Server and

modulatormodulator Siemens class A transmitterSiemens class A transmitter

Built in the 1960s, acquired by HCJB in 1990sBuilt in the 1960s, acquired by HCJB in 1990s Used for SSB, back for tropical band broadcastsUsed for SSB, back for tropical band broadcasts Capable of 20 kW analog, 4 kW DRM Capable of 20 kW analog, 4 kW DRM

Stearable antenna – high gain parabolic Stearable antenna – high gain parabolic screenscreen

Rhombic antenna to BrazilRhombic antenna to Brazil

DRM from HCJBDRM from HCJB

European broadcastEuropean broadcast Since May 2007Since May 2007 Primarily German, some Spanish and EnglishPrimarily German, some Spanish and English Summer months on 9815 kHz 0500-0600 UTCSummer months on 9815 kHz 0500-0600 UTC Winter months on 15275, 15350, 1100-1300 Winter months on 15275, 15350, 1100-1300

UTCUTC Used 16 QAM to achieve a decode at 6 db less Used 16 QAM to achieve a decode at 6 db less

SNRSNR Used Mode A and Unequal Error Protection to Used Mode A and Unequal Error Protection to

maximize audio qualilty at 14 kbps with SBR maximize audio qualilty at 14 kbps with SBR

DRM from HCJBDRM from HCJB

European broadcastsEuropean broadcasts Early results very encouragingEarly results very encouraging DW monitoring network included HCJB in DW monitoring network included HCJB in

its regular monitoringits regular monitoring Received attention from the DRM Received attention from the DRM

consotrium Systems Evaluation (SE) consotrium Systems Evaluation (SE) groupgroup

Many listeners also monitored and Many listeners also monitored and reportedreported

See DRMRX forumSee DRMRX forum

DRM from HCJBDRM from HCJB

Audio recording Audio recording from listener in from listener in Sweden – Sweden – September 2007September 2007

DRM from HCJBDRM from HCJB

Brazil broadcastBrazil broadcast Begun January 2008Begun January 2008 Using rhombic antenna that will be used Using rhombic antenna that will be used

for our regular broadcasts once the current for our regular broadcasts once the current Brazil antennas are removed at the end of Brazil antennas are removed at the end of 20082008

Purpose – to encourage DXs in Brazil to Purpose – to encourage DXs in Brazil to investigate DRMinvestigate DRM

At this point only one person regular At this point only one person regular monitorsmonitors

DRM from HCJBDRM from HCJB

Questions?Questions?