ITBANDPASSCONFIG
Enable and configure bandpass filter on receiver
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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.
When applying a filter to a signal using the MEC correlator, a brief interruption in tracking may occur on affected channels.
This command is available only on some software models. Contact your NovAtel Sales representative (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
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Field |
Field Type |
ASCII Value |
Binary Value |
Description |
Format |
Binary Bytes |
Binary Offset |
|---|---|---|---|---|---|---|---|
|
1 |
Command header |
- |
- |
ITBANDPASSCONFIG header This field contains the command name for abbreviated ASCII or the message header for ASCII (see page 1) or Binary (see page 1). |
- |
H |
0 |
|
2 |
frequency |
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). Refer to ITBANDPASSBANK log for the allowable values. |
Float |
4 |
H+8 |
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