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5-31
Servicing
Performance Tests
Test 8. Output Power
1
Connect the Agilent 83430A’s
OPTICAL OUT
connector to a optical power meter.
2
Disconnect any cables connected to the Agilent 83430A’s
ANALOG IN
or
DIGITAL
IN
input connectors.
3
Turn the Agilent 83430A on, and press the front-panel
PRESET/VARIABLE
button
so that the
BIAS ADJUST
light is off.
4
Press the Agilent 83430A’s front-panel
SELECT
key repeatedly until the
DIGITAL
IN DC COUPLED
light is on.
5
Verify that the optical output power measures 10.0 dBm ±0.2 dB.
6
Press the front-panel
PRESET/VARIABLE
button so that the
BIAS ADJUST
light is on.
7
Turn the front-panel
BIAS ADJUST
knob fully clockwise.
8
Verify that the optical output power does not exceed –2.5 dBm.
9
Turn the front-panel
BIAS ADJUST
knob fully counterclockwise.
10
Connect the pattern generator’s output to the Agilent 83430A’s
DIGITAL IN DC
COUPLED
input connector.
11
Configure the Agilent 70841B pattern generator to output an ECL logic level 1:
a
Set the pattern generator to the following settings. For step-by-step instruc-
tions on setting these values, refer to “Configuring the pattern generator” on
page 5-35.
data pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
23
–1
data amplitude (ECL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .850 mV p-p
data output high level (ECL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –900 mV
data termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–2 V
trigger mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLOCK / 23
trigger pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 zeros
clock rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51.84 MHz
clock amplitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 mV
b
Press the left-side
edit usr-pat
softkey.
c
Press
CURRENT PATTERN
,
more 1 of 3
,
set pat length
, enter the value 8, and then
press
ENTER
.
d
Press
BIN HEX
so that
HEX
is underlined.
e
Press
more 2 of 3
and then press the
F
softkey twice.