ITBANDPASSCONFIG

Enable and configure bandpass filter on receiver

Platform:

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

Use this command to apply a bandpass filter at a certain frequency to mitigate interference in the pass band of GNSS signals. The ITBANDPASSBANK log provides information on the allowable configuration settings for each frequency band. The bandpass filter is symmetrical in nature, which means that specifying one cutoff frequency will apply a cutoff on both the low side and high side of the signal's center frequency. Only one filter can be applied for each signal.

To enable a filter on the signal received from the secondary antenna of dual antenna receivers (OEM7720, PwrPak7D, PwrPak7D-E1, PwrPak7D-E2 and CPT7), use the ITBANDPASSCONFIG_1 command.

On OEM7720, PwrPak7D, PwrPak7D-E1, PwrPak7D-E2 and CPT7 receivers, any filter enabled for GPS L2 or GLONASS L2 on the secondary antenna will be applied to both GPS L2 and GLONASS L2. For this reason, care must be taken to avoid attenuating the signals with a bandpass filter that is too narrow in bandwidth. The recommended maximum lower cutoff frequency is 1221 MHz. The recommended minimum upper cutoff frequency is 1254 MHz.

This command is available on E model receivers only. Contact your NovAtel Sales representation (novatel.com/contactus/sales-offices) to obtain interference mitigation functionality.

Message ID: 1999

Abbreviated ASCII Syntax:

ITBANDPASSCONFIG frequency switch [cutofffrequency]

ASCII Example:

ITBANDPASSCONFIG gpsl5 enable 1165.975

Field

Field Type

ASCII Value

Binary Value

Description

Format

Binary Bytes

Binary Offset

1

ITBANDPASS
CONFIG header

-

-

Command header. See Messages for more information.

-

H

0

2

frequency

See Table: Frequency Types

Set the frequency band on which to apply the filter

Enum

4

H

3

switch

DISABLE

0

Disable filter

Enum

4

H+4

ENABLE

1

Enable filter

4

cutofffrequency

 

Cut off frequency for band pass filter (MHz).
(default = 0)

Refer to ITBANDPASSBANK log for the allowable values.

Float

4

H+8