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Acutime 2000 Synchronization Kit User Guide A-75
A Trimble Standard Interface Protocol
0x7A Command Packet 7A
Set or Request NMEA Interval and Message Mask
The NMEA mask determines whether or not a given NMEA message
will be output. If the bit for a message is set, the message will be sent
every “interval” seconds. To determine the NMEA interval and
message mask, use the values shown in Table A-64. While fixes are
being generated, the output order is: ZDA, GGA, GLL, VTG, GSA,
GSV, RMC.
Table A-64 Command Packet 7A
Byte Bit Item Type Value Definition
0 Subcode UINT8 0
1 Interval UINT8 1-255 Fix interval in seconds
2 Reserved UINT8 0
3 Reserved UINT8 0
40 RMC Bit0
1
Off
On
4 1-7 Reserved Bit 0
50 GGA Bit0
1
Off
On
51 GLL Bit0
1
Off
On
52 VTG Bit0
1
Off
On
53 GSV Bit0
1
Off
On
54 GSA Bit0
1
Off
On
55 ZDA Bit0
1
Off
On
5 6-7 Reserved Bit 0