Tektronix DC 5010 Anleitung Seite 19

Table
1-1
(cont)
Characteristics
Auto Trigger
Range (A or B)
Operating Range
Attenuation
X1
X5
AC Coupling
Maximum Alilowable lnput
(Damage Level)
50
Q
--
Attenuation Impedance
lnput Imped'ance
50
Q
Performance Requirements
20 Hz to a 3 5 0 MHz
Minimum signal required for Auto Trigger
is 100 mV p-p.
In Ratio mode, with Channel B
frequency 2 2 0 0 MHz, the Auto Trigger
will provide a CHA B level within
k
24 mV of the 50% point.
+
2 V to -2 V (dc
+
peak ac)
+10 V to -10 V (dc
+
peak ac)
50
Q
input dc
G
a 2 V (dc plus peak ac) times
attenuator 1 MQ input ~ 4 2 V dc
+
peak ac
Vpk ~2 V
Vpk 4 0 V
50
Q
approximately
+
3% dc
1 MQ approximately
+
l0/0
23 pF approximately a 10% (2.2 pF)
Supplemental Information
Trigger point is set (once) to
a nominal 50% of the p-p in-
put signal. For signals dc to
20 Hz (inclusive), level will
still be set between 0% and
1 0O0/0, but not necessarily
near 50%. A ten-bit DAC is
used, giving nominal 4 mV
steps (X attenuation factor).
In 50
Q
input mode, 50
Q
over-
voltage protection trips in 1 M input
impedance for signals greater than
approximately
-t
2 V times
attenuator dc
+
peak ac to
200 kHz.
dc to 350 MHz
+
42 V dc
+
peak ac, dc to
200 kHz
a 2 V dc
+
peak ac, 2 MHz to
300 MHz
+ 1 0 V d c
+
peak ac, dc to
350 MHz
+
42 V dc
+
peak ac, dc to 1 MHz
+
10 V dc
+
peak ac, 1 MHz to
300 MHz
VSWR approximately 1.5:1,
dc to 350 MHz
Bleeder resistor results in
=390 kQ dc input resistance.
For inputs greater than a 5 Vdc
+
peak ac, input impedance
becomes approximately 300 kQ
1000 pF, XI.
lnput C from XI to X5 are equal by
approximately
a
1 %.