Position Fix Parameters - ashtech ZY-12 Information Supplement

Parameter
PORT A PORT B
PORT C PORT D
EXT FREQ
PULSE GEN
DATUM
MODEM
SUBCMDS
SEC. MODUL

Position Fix Parameters

Use the Position Fix Parameters screen (Figure 3.7) to specify position
computation criteria (stored and displayed) such as how many satellites to use,
when to hold altitude fixed, Dilution of Precision (DOP) masks, elevation mask,
and use of unhealthy satellites. You can also enable the ionospheric model to be
used for position computation, display computed position in Screen 2 using UTM
coordinates, and use point positioning mode.
30
Table 3.7. Screen 4 Parameters (continued)
Takes you to a subscreen where you can specify serial port output
parameters.
Can be accessed only if the external frequency (x) option has been loaded
into the receiver. When EXT FREQ is selected, the receiver presents a
subscreen which lets you set up the external frequency parameters.
Goes to the Pulse Generation Parameters subscreen that controls the 1PPS
output.
Goes to the Datum Selection subscreen where you can select one of 46
possible datums to use for displaying the pseudo-range position shown on
Screen 2. Note that this datum is not used for computing the position stored
in memory.
Lets you set up your modem for Port A, B, C, or D.
Lets you enter system-level commands.
Lets you set a mission duration or zeroize the key
Figure 3.7. Position Fix Parameters
Description
ZY-12 GPS Receiver