Itprogfiltconfig - Novatel OEM6 Integration Manual

Chapter 2 New for OEM7 – Firmware

2.2.17 ITPROGFILTCONFIG

Enable and configure filtering on the receiver
Platform: OEM729, OEM719, OEM7700
Use this command to set the programmable filter to be either a notch filter or a bandpass filter
to mitigate interference in the pass band of GNSS signals. The notch filter is used to attenuate a
very narrow band of frequencies (specified by the notch width) around the center frequency. The
bandpass filter attenuates the entire range of frequencies above the high end of the cutoff fre-
quency and below the low end of the cutoff frequency (which is symmetrical about the center fre-
quency of each GNSS signal). For instance, applying a cutoff frequency of 1576.3 MHz in the
GPSL1 frequency band (this is on the high side as the center frequency is 1575 MHz) will also
apply a cutoff at 1573.7 MHz (low side). The ITPROGFILTBANK log (see page 106) provides
information on the allowable configuration settings for the programmable filter (i.e. the allow-
able settings for the notch filter and bandpass filter) for each frequency band. Only one filter can
be applied for each signal.
Message ID: 2000
Abbreviated ASCII Syntax:
ITPROGFILTCONFIG frequency progid switch [filtermode] [cutofffreq]
[notchwidth]
ASCII Example:
ITPROGFILTCONFIG gpsl1 pf0 enable notchfilter 1580 1
Field Field Type
ITPROGFILT
1 CONFIG
header
2 frequency
3 progid
4 switch
OEM6 to OEM7 Integration Guide v1
ASCII Binary
Value Value
- -
See Table 21:
Frequency Types
on page 47
See Table 18:
Programmable
Filter ID on the
next page
DISABLE 0
ENABLE 1
Description
Command header. See
Messages for more
information.
Set the frequency band
on which to apply the
filter
Select the filter ID to use
Any filter can be used
and filters can be used
with other filters to
create cascading filters
Disable the filter
Enable the filter
Binary Binary
Format
Bytes Offset
- H 0
Enum 4 H
Enum 4 H+4
Enum 4 H+8
44