SECTION FIVE: Checking out the system
Page 22
958 Installation Manual, Rev. A1
Selecting differential options
The 958 has several settings for differential reception. To select one, press the
STAR
key to display
the
OPTIONS/SERVICE INFO
screen, then press the
RECEIVER OPTIONS
key to display the
RECEIVER
OPTIONS
screen. The
DIFFERENTIAL OPERATIONS
field offers the following options (depending on
the equipment connected to the 958):
•
DISABLED
- to turn off all differential corrections
•
RADIO BEACON
- to force radiobeacon differential
if
the 958 is connected to a
radiobeacon source (for example, the 2701)
•
WAAS
- to force WAAS differential corrections
if
the 958 is connected to a
WAAS-capable unit (for example, the 2201, 2301, or 2701)
•
AUTO
- (the default setting) to prefer WAAS differential corrections, but
if
the 958 is
connected to the optional 2701, the 958 will automatically switch to radiobeacon
corrections
if and when
WAAS becomes unavailable or is less accurate than
radiobeacon
Installation-test checklist
To check-out the 958 system after installation:
1. Turn on the 958, then check for the presence of GPS, WAAS, or DGPS signals.
2. Review the functions: With a chart cartridge inserted
,
check that the
CHART
screen
is displayed.
3. Confirm that the
DIFFERENTIAL OPERATIONS
option is at the desired setting
.
If
not, press the
STAR
key to display the
OPTIONS/SERVICE INFO
screen, then press
the
RECEIVER OPTIONS
menu key to display the
RECEIVER OPTIONS
screen.
Press the
EDIT
key, change it to the desired setting, then
press the
ENTER
key.
For more in-depth information about troubleshooting the 958 installation, see ”SECTION SEVEN:
Troubleshooting and servicing the 958 system” starting on page 35.
TABLE 5: Satellite identification numbers
PRN
120 121
122
123
124
125
126
127
128
129
ON GPS
SATS
SCREEN
33
34
35
36
37
38
39
40
41
42
PRN
130
131
132
133
134
135
136
137
138
ON GPS
SATS
SCREEN
43
44
45
46
47
48
49
50
51