test results of nautel am iboc hd transmitter …...iboc exciter ibiquity am hd receiver. ibiquity...

PRESENTED TONRSC DAB SUBCOMMITTEE

BYTOM F. KING

PRESIDENT, KINTRONIC LABORATORIES, INC.

TEST RESULTS OF NAUTEL AM IBOC HDTEST RESULTS OF NAUTEL AM IBOC HDTRANSMITTER PERFORMANCE TRANSMITTER PERFORMANCE

VERSUSVERSUSANTENNA LOAD IMPEDANCEANTENNA LOAD IMPEDANCE

CHARACTERISTICSCHARACTERISTICS

APRIL 5, 2003

• NO AM ANTENNA SYSTEM REQUIREMENTS FOR HD RADIO SUBSTANTIATED BY DOCUMENTED TEST RESULTS HAVE BEEN PUBLISHED

• HD RADIO IS NOW BEING IMPLEMENTED IN THE US MARKET

• AS A LEADING PROVIDER OF AM ANTENNA SYSTEMS IN THE US MARKET, IT IS OF VITAL INTEREST TO KINTRONIC LABS TO PROVIDE ACCURATE DESIGN CRITERIA FOR HD TRANSMITTERS TO POTENTIAL CUSTOMERS

BACKGROUNDBACKGROUND

• TO ASSESS THE EFFECTS OF ANTENNA LOAD SIDEBAND VSWRON TRANSMITTER BIT ERROR RATE (BER)

• TO ASSESS THE EFFECTS OF ANTENNA LOAD CUSP ORIENTATION ON TRANSMITTER BER

• TO ASSESS THE EFFECTS OF ANTENNA LOAD SIDEBAND VSWR AND CUSP ORIENTATION ON RECEIVED AUDIO SIGNAL QUALITY, I.E., HYBRID, MARGINAL DIGITAL+ANALOG, OR ANALOG ONLY

• TO DEVELOP AM ANTENNA SYSTEM CRITERION FOR RELIABLEHD TRANSMISSION SYSTEM OPERATION

HD DAB TEST GOALSHD DAB TEST GOALS

IBOC HD DABTEST SETUP BLOCK DIAGRAM

IBOC DABANTENNA LOAD SIMULATOR

NAUTEL ND1 HD TRANSMITTER AND IBIQUITY RECEIVER

NAUTEL ND1 AM TRANSMITTER

NAUTEL AM IBOC EXCITER

IBIQUITY AM HD RECEIVER

IBIQUITY HD TEST RECEIVER

EXAMPLE OF SIMULATED ANTENNA LOAD PASSBAND SWEEP

EXAMPLE OF SIMULATED ANTENNA LOAD PHASE SHIFT CHARACTERISTICS

PHASE SHIFT OF ND1 OUTPUT NETWORK

*HP 4396 NETWORK ANALYZER PLOT

5V/div

-53°

EXAMPLE OF 3:00 CUSP ROTATION

EXAMPLE OF 6:00 CUSP ROTATION

EXAMPLE OF 12:30 CUSP ROTATION

TEST RESULTS FOR 3:00 CUSP ROTATION

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

2.60

2.80

fc-20 fc-15 fc-10 fc-5 fc fc+5 fc+10 fc+15 fc+20

FREQUENCY (kHz)

VS

WR

PERFECT HYBRID RECEPTION2 LOCK LOSSES IN 5 MIN7 LOCK LOSSES IN 5 MIN9 LOCK LOSSES IN 5 MIN

ANALOG ONLY

0000

6.3 x 10-4

AUDIO RECEPTION BER

TEST RESULTS FOR 6:00 CUSP ROTATION

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

2.60

2.80

fc-20 fc-15 fc-10 fc-5 fc fc+5 fc+10 fc+15 fc+20

FREQUENCY (kHz)

VS

WR

PERFECT HYBRID RECEPTION

4 LOCK LOSSES IN 5 MIN

46 LOCK LOSSES IN 5 MIN

000

AUDIO RECEPTION BER

PERFECT HYBRID RECEPTION INDEPENDENTOF CUSP ROTATION FOR ILLUSTRATED PASSBAND

1.00

1.10

1.20

1.30

1.40

1.50

1.60

fc-20 fc-15 fc-10 fc-5 fc fc+5 fc+10 fc+15 fc+20

FREQUENCY (kHz)

VS

WR

1.00

1.20

1.40

1.60

1.80

2.00

2.20

fc-20 fc-15 fc-10 fc-5 fc fc+5 fc+10 fc+15 fc+20

FREQUENCY (kHz)

VS

WR

BER vs. CUSP ROTATION FOR +/- 10kHz VSWR < 1.4:1

ANALOG ONLY4.8 x 10-512:30

11 LOCK LOSSES/5MIN3.0 x 10-51:30

3.5 LOCK LOSSES/5MIN5.2 x 10-62:00

15 LOCK LOSSES/5MIN8.9 x 10-62:30

PERFECT03:00

AUDIO QUALITY

BERCUSPROTATION

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

fc-20 fc-15 fc-10 fc-5 f c fc+5 fc+10 fc+15 fc+20

FREQUENCY (kHz)

VS

WR

BER vs. CUSP ROTATION FOR +/- 10kHz VSWR < 1.5:1

35 LOCK LOSSES/5MIN1.8 x 10-63:00

7 LOCK LOSSES/5MIN2.06 x 10-54:00

1 LOCK LOSSES/5MIN05:00

PERFECT06:00

AUDIO QUALITY

BERCUSPROTATION

CONCLUSIONSCONCLUSIONS

SIDEBAND VSWR THRESHOLD FOR PERFECT HYBRID DIGITAL + ANALOG RECEPTION INDEPENDENT OF CUSP ORIENTATION

1.00

1.10

1.20

1.30

1.40

1.50

1.60

VSWR THRESHOLD

ANTENNA LOAD SIDEBANDS (kHz)

VSWR 1.11 1.25 1.40 1.55

± 5 ± 10 ± 15 ± 20

SIDEBAND VSWR THRESHOLD FOR PERFECT HYBRID DIGITAL +ANALOG RECEPTION FOR 3:00 AND 6:00 CUSP ORIENTATION

1.00

1.20

1.40

1.60

1.80

2.00

2.20

VSWR THRESHOLD

ANTENNA LOAD SIDEBAND (kHz)

3:00 CUSP ROTATION

6:00 CUSP ROTATION

3:00 CUSP ROTATION 1.16 1.34 1.56 1.82

6:00 CUSP ROTATION 1.22 1.47 1.79 2.18

± 5 ± 10 ± 15 ± 20

SIDEBAND VSWR THRESHOLD AT WHICH DIGITAL RECEPTION DROPOUT OCCURS FOR 3:00 CUSP ORIENTATION

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

VSWR THRESHOLD

ANTENNA LOAD SIDEBANDS (kHz)

Series1 1.23 1.50 1.85 2.27

± 5 ± 10 ± 15 ± 20

• ALL RESULTS SHOWN ARE CONCLUSIVE, EXCLUDING ANY PROPAGATION PATH EFFECTS

• ALL RESULTS SHOWN APPLY FOR THE NAUTEL ND1 TRANSMITTER, WHICH UNIQUELY UTILIZES AN OUTPUT NETWORK WITH ZERO PHASE SHIFT. OTHER TRANSMITTER MAKES AND MODELS MAY YIELD DIFFERENT RESULTS

• BIT ERROR RATE IS NOT A FULL INDICATOR OF DIGITAL RECEPTION QUALITY

GENERAL CONCLUSIONSGENERAL CONCLUSIONS