Short Form Specification Test - Fluke PM6690 Service Manual

Short Form Specification
Test
Sensitivity and Frequency Range
– Recall the DEFAULT settings.
– Press .
INPUT A
W input impedance,
– Select
50
trigger and ger level
Trig
– Connect a signal from a HF generator to a BNC power
splitter.
– Connect the power splitter to Input A of your counter
and an oscilloscope.
– Set the input impedance to 50 W on the oscilloscope.
– Adjust the amplitude according to the following table.
Read the level on the oscilloscope. The timer/counter
should display the correct frequency.
– Connect the signal to Input B.
– Press .
INPUT B
W input impedance,
– Select
50
trigger and Trig ger level
®
– Press MEAS FUNC Freq
– Repeat the measurements above for Input B.
Frequency Level
(MHz)
mV dBm
rms
10 15
50 15
100 15
200 15
300 25
Table 2-5
Sensitivity for inputs A & B at various frequencies
Voltage
– Recall the DEFAULT settings.
®
– Press
MEAS FUNC Volt
– Press and select
INPUT A
input signal to Input A yet.
– Press .
EXIT/OK
– The display should now indicate
(disregard the main parameter V
V = 0 ± 0.015 V and
MIN
V = 0 ± 0.015 V
MAX
– Adjust the current limit of the voltage source to
<200 mA.
– Connect +2.500 V to Channel A, using the external
DC
low-pass filter on the input.
– The display should now indicate:
V = 2.500 ± 0.040 V and
MIN
V = 2.500 ± 0.040 V
MAX
2-4 Performance Check, Short Form Specification Test
attenuation,
1x MAN
.
0 V
attenuation,
1x MAN
0 V .
® ®
Freq A B
Pass/Fail
Input A Input B
–23
–23
–23
–23
–19
® ®
Vpp A
coupling. Do not apply an
DC
):
PP
– Repeat the measurement with inverted polarity.
– Press
INPUT A
– Press
EXIT/OK
CAUTION: Before the next step, make sure
the input impedance is still 1 MW. Apply-
ing more than 12 V without proper current
limiting may cause extensive damage to
ual
the main PCB, if the impedance is set to
50 W.
– Change the DC level to +50.00 V.
– The display should now indicate:
V = 50.00 ± 0.65 V and
MIN
V = 50.00 ± 0.65 V
MAX
– Repeat the measurement with inverted polarity.
– Disconnect the DC voltage from Channel A.
– Remove the external low-pass filter.
– Press
INPUT A
– Press
EXIT/OK
ual
– Connect a sinusoidal signal to Input A with an amplitude
of 4.000 Vpp and a frequency of 100 kHz.
– The display should now indicate: 4.000 ± 0.150 V
– Press
INPUT A
– Press
EXIT/OK
– Change the amplitude to 18.00 V
– The display should now indicate:
18.00 ± 0.84 V
– Disconnect the signal from Channel A.
– Press
MEAS FUNC
– Press
INPUT B
input signal to Input B yet.
– Press EXIT/OK
– The display should now indicate
(disregard the main parameter V
V = 0 ± 0.015 V and
MIN
V = 0 ± 0.015 V
MAX
– Proceed by repeating the measurements for Input B as
described above for Input A.
Trigger Indicators vs. Trigger Levels
Trigger Level
(manually set)
+1 V
-1 V
0.0 V
Table 2-4
NOTE: This test must be performed in the sequence given.
– Recall the DEFAULT settings.
and select .
10x
.
and select .
1x
.
and select .
10x
.
.
PP
.
PP
® ® ®
Volt Vpp
and select coupling. Do not apply an
DC
.
):
PP
Trigger Indicator
Input A
off
on
blinking
Trigger indicator check.
.
PP
B
Pass
Input B