1.9. Legacy and New Generation Cards
Set Operating Parameters (GPS packet 0x2C)
Packet Data Item
Value
Packet ID
0x2c
Dynamics Code
4 (Static)
Elevation Angle Mask
0.1745 Radians (10 Degrees)
Signal Level Mask
6.0
PDOP Mask
12.0
PDOP Switch
8.0
Set High-8 / High-6 Mode (GPS packet 0x75)
Packet Data Item
Value
Packet ID
0x75
Mode
0 (high-8)
Set I/O Options (GPS packet 0x35)
Packet Data Item
Value
Packet ID
0x35
Position
0x03
Velocity
0x03
Timing
0x00
Auxiliary
0x00
To change any of the packet 0x35 options, keep the following in mind: The TFP monitors position and
velocity packets so the “position” and “velocity” options should be sent with bits 0 and 1 set; the TFP
extracts major time from time packets broadcast by the GPS receiver so the “timing” option should be
sent with bits zero, one, and two cleared.
1.9. Legacy and New Generation Cards
This section covers differences between legacy bc635/637PCI-U (PCI-U) cards and the new gen-
eration bc635/637PCI-V2 (PCI-V2) and bc635/637PCIe (PCIe) cards.
Both the legacy and the new generation cards map both register and DPRAM into memory spaces,
but there is a difference in the PCI base address register (BAR) mapping.
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