Spectracom Corporation
8194B, 8195B, 8197B
GPS Ageless Master Oscillator Instruction Manual
2-13
10= 00000 11= 00000 12= 00000 Q= 03600
TIME= 15:00:00 DATE= 2004-03-24
0= 00000 1= 00000 2= 00000 3= 00000 4= 00000
5= 00000 6= 00000 7= 00000 8= 02678 9= 00580
10= 00342 11= 00000 12= 00000 Q= 03600
TIME= 15:01:59 DATE= 2004-03-24
0= 00000 1= 00000 2= 00000 3= 00000 4= 00000
5= 00000 6= 00000 7= 00000 8= 00000 9= 00027
10= 00091 11= 00000 12= 00000 Q= 00118
END OF LOG
In this example, the receiver tracked six satellites for 19 seconds, seven satellites for
1537 seconds, and eight satellites for 2044 seconds for the hour ending 12:00:00. The
"Q" value of 3600 indicates the receiver had tracked at least four qualified satellites for
the entire hour (3600 seconds). Note the partial histogram shown in the time stamp of
15:01:59.
For optimum performance, the receiver should consistently track four or more satellites.
The Q value should typically be 3600 for most entries. Occasional drops below 3600
are considered acceptable. If the majority of the histograms show tracking less than
four satellites, or Q values less than 3000, the receiver may not provide reliable
operation. Refer to Section 2.9.2 for recommendations.
2.9
Reception Troubleshooting
Please review this section prior to calling the Spectracom Customer Service
Department. If the reception problem cannot be solved following the guidelines outlined
in this section, please call for Customer Service at 585.321.5800.
2.9.1 No
Reception
Cable or connector problem
: Measure the antenna cable resistance to verify the
integrity of the cable and connectors. Remove the antenna cable from the rear panel of
the receiver and measure the resistance from the coax center to shield. Refer to Table
2-2 for typical resistance values of the antenna and inline amplifier alone and when
combined.
DEVICE RESISTANCE
8225 180
ohms
8227 165
ohms
8225 and 8227
85 ohms
Table 2-2 Typical Antenna Cable Resistance Values
Failed impulse suppressor
: The Model 8226 has a high impedance when measuring
from the center conductor to ground and a low throughput resistance. A failing impulse
