ITPSDDETECT

Power spectral density computed by the interference detection algorithm

Platform:

OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2

The ITPSDDETECT log contains the power spectral density samples for the interference detection algorithm for all available RF paths, excluding the LBand path. The log will iterate through all available RF paths. It collects raw samples from Predecimation data source (as per the ITPSDFINAL log) every 500 ms. For dual antenna receivers, only the RF paths from the primary antenna are considered. Note that one log is output for every 1024 expected samples for a maximum of 32 logs and can be grouped together through the sequence number in the log header.

To view the power spectral density samples for the secondary antenna of dual antenna receivers (OEM7720, PwrPak7D, PwrPak7D-E1, PwrPak7D-E2 and CPT7), log ITPSDDETECT_1.

PSD Samples

PSD samples are compressed into 2 byte samples to reduce log sizes. The range of values that can be displayed is -200 dBm to +56 dBm with a 1/256 resolution. The following steps should be performed on the PSD samples in this log to convert them back into dBm units for display purposes:

  1. Divide the sample by 256.0

  2. Subtract 200

Message ID: 2063

Log Type: Asynch

Recommended Input:

log itpsddetect onnew

ASCII Example

ITPSDDETECTA,USB3,1,77.0,FINESTEERING,2052,151452.017,02000020,32d1,32768;
08021b25,1141.287,73242.188,1024,19893,19839,20418,18698,19618,20176,20243,
19332,20410,20326,19996,19113,20048,19865,19522,18944,
… 27573,27360,27674,27275,26996,26463,27356,26813,27360,26959,26799,27733,26212,
27136,27631,27116*fad8207c

Field

Field Type

Description

Format

Binary Bytes

Binary Offset

1

ITPSDDETECT header

Log header. See Messages for more information.

H

0

2

Status word

Status word containing information about the detection configuration (see Table: Interference Detection Status Word)

Ulong

4

H

3

Frequency start

Frequency represented by first data sample in MHz

Float

4

H+4

4

Resolution bandwidth

The resolution bandwidth (RBW) in Hz

Float

4

H+8

5

# of samples

Number of spectral density samples

Ulong

4

H+12

6

Sample array

Array of power spectral density samples

Ushort

2*NumOf
Samples

H+16

7

xxxx

32-bit CRC (ASCII and Binary only)

Ulong

4

H+16+
2*NumOf
Samples

8

[CR][LF]

Sentence terminator (ASCII only)

Interference Detection Status Word

Nibble

Bit

Mask

Description

Range Value

N0

0

0x00000001

Frequency

See Table: RF Frequency PathTable 2

1

0x00000002

2

0x00000004

3

0x00000008

N1

4

0x00000010

Data Source

Predecimation

5

0x00000020

6

0x00000040

7

0x00000080

N2

8

0x00000100

Reserved

9

0x00000200

10

0x00000400

11

0x00000800

N3

12

0x00001000

Reserved

13

0x00002000

14

0x00004000

15

0x00008000

N4

16

0x00010000

Reserved

17

0x00020000

18

0x00040000

19

0x00080000

N5

20

0x00100000

Reserved

21

0x00200000

22

0x00400000

23

0x00800000

N6

24

0x01000000

Reserved

25

0x02000000

26

0x04000000

27

0x08000000

N7

28

0x10000000

Reserved

29

0x20000000

30

0x40000000

31

0x80000000

RF Frequency Path

Binary

ASCII Value

Description

2

L1

L1 RF Path

3

L2

L2 RF Path

5

L5

L5 RF Path