Performance veri
fi
cation
5.
Con
fi
gure the GPI 1 output to be asserted on unlock as follows:
a.
Press the
SYSTEM
button on the SPG8000 under test.
b.
Use the down (
▼
) arrow button to select
GPI
, and then press the
ENTER
button.
c.
Use the down (
▼
) arrow button to select
GPI : OUTPUT 1
, and then
press the
ENTER
button.
d.
Use the down (
▼
) arrow button to select
LOCK ERROR
.
e.
Press the right (
►
) arrow button to select
Enable
, and then press the
ENTER
button.
6.
Check that the voltage on the GPI 1 output measures between 4.5 V and 5.5 V.
7.
Record the result in the test record.
8.
Disconnect the reference input to the SPG8000 under test. After 15 seconds,
check that the GPI 1 output is below 0.5 V.
9.
Record the result in the test record.
10.
Reconnect the cable from the reference unit to the reference input on the
SPG8000 under test.
11.
Repeat steps 5 through 10 for the GPI 2 output.
12.
Solder a wire to pin 6 of the male 9-pin DSUB connector.
13.
Use test leads to attach the voltmeter to the pin-6 wire from the DSUB
connector and to chassis ground.
14.
Repeat steps 5 through 10 for the GPI 3 output.
15.
Disconnect the GPI 3 output from the voltmeter.
54
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
