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 L-band path. The log will iterate through all available RF paths. Generally, the ITPSDDETECT log is output slightly slower than every 1 second. 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.

For dual antenna receivers, an ITPSDDETECT_1 log can be requested to view the power spectral density samples for the second antenna. As described in Table: Binary message header structure, the message type indicates the log is from the second antenna. To request an ASCII log enter ITPSDDETECTA_1, and for a binary log enter ITPSDDETECTB_1.

The ITPSDDETECT_1 log is configured using the ITDETECTCONFIG_1 command.

The ITPSDDETECT and ITPSDDETECT_1 logs use the same message ID.

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,USB1,1,52.5,FINESTEERING,2209,508190.633,12000020,32d1,16809;04021b22,1531.287,73242.188,1024,23036,20816,21178,20917,21252,21069,21186,21501,20228,21326,20561,21254,21157,20442,21682,20875,20916,20918,21560,20287,20694,21350,21409,20872,20725,20847,20715,21251,20716,21121,20794,21088,21757,21782,21421,20433,19660,21395,21592,21157,20945,21297,20162,21313,20726,21544,21468,20795,21080,21124,20490,20914,21649,20835,21548,21097,20551,20178,21341,20793,21013,20290,21337,21242,21183,21769,21520,21416,20519,21761,21211,21026,21408,21539,21257,20919,20828,20916,21124,20947,21278,20213,21124,21432,21284,21336,20645,21817,21091,21413,21390,20698,21843,20842,20867,20598,21750,20852,

...

27699,28604,28277,28894,28715,28949,29529,28176,28121,28923,28753,29411,28256,29559,27903,29107,29586,28285,29234,28915,28149,29504,28818,29505,28672,28325,28951,27607,28919,28644,27515,28498,28440,29568,28695,28305,28256,27916,29967,27756,28453,27556,28395,29259,28183,29241,29288,29205,28347,29147,29471,29428,28958,28990,29356,29099,28455,29793,28800,28017,28291,28704,27458,29274,29320,29374,28700,27100,28272,27938,29056,29151,28173,29381,29479,29597,29123,28960,28689,28853,28614,28530,28571,28328*fd9113f5

Field

Field type

Description

Format

Binary bytes

Binary offset

1

Log header

ITPSDDETECT header

For information about log headers, see ASCII, Abbreviated ASCII or Binary.

–

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 path

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

Description

2

L1

L1 RF Path

3

L2

L2 RF Path

5

L5

L5 RF Path
RF paths for OEM7 receivers

RF path

OEM719, OEM729,
OEM7700, PwrPak7,
CPT7700, SMART7

OEM7720,
PwrPak7D, CPT7

OEM7500,
SMART2

OEM7600

L1

GPS L1

GLONASS L1

Galileo E1

BDS B1

QZSS L1

SBAS L1

 

GPS L1

GLONASS L1

Galileo E1

BDS B1

QZSS L1

SBAS L1

 

GPS L1

GLONASS L1

Galileo E1

BDS B1

QZSS L1

SBAS L1

LBand

GPS L1

GLONASS L1

Galileo E1

BDS B1

QZSS L1

SBAS L1

 

L2

GPS L2

GLONASS L2

Galileo E6

BDS B3

QZSS L2/L6

 

 

GPS L2/L5

GLONASS L2/L3

Galileo E5

BDS B2

QZSS L2/L5

NavIC L5

SBAS L5

GPS L2/L5

GLONASS L2/L3

Galileo E5

BDS B2

QZSS L2/L5

NavIC L5

SBAS L5

GPS L2/L5

GLONASS L2/L3

Galileo E5

BDS B2

QZSS L2/L5

NavIC L5

SBAS L5

L5

GPS L5

GLONASS L3

Galileo E5

BDS B2

QZSS L5

NavIC L5

SBAS L5

 

 

 

LBAND

LBand

LBand

 

LBand