Tektronix 494A Water Dispenser User Manual


 
OPTION
07 ALTERNATE
SPECIFICATIONS
Within
2ao/o
ol selected
bandwidth
*2.0
dB about
the
midpoint
between
two
extremes
+20
dBmV
*0.5
dB
at
100
MHz
Optons
-
4944/494Ap
Servlce,
Vol.
1
Option
07
(75O
Inpur)
Option
07
provides
an
optional
7SO
input
and
*20
dBmV
calibrator
in
addition
to the standard
50O
input
and +20
dBm calibrator.
Also,
a
300
kHz
Resolution
Bandwidth
filter replaces
the
100 kHz
fitter.
The
7SO
input
replaces
the €xtemal
mixer
capability.
Table
g-2
lists
the changes
and
additions
to
the
standard
instru-
msnt
electrical
characteristics.
These
characteristics
apply
to
the 75o
Input
except
for
the
3@ kHz
50 o
Input
sensitivity.
Option
08
(Delete
External
Mixer Input)
Option
08 deletes the
ext€mal
mixer
capability.
The
frequency range
is 10
kHz
to 21
GHz.
o
o
O
a
I
o
o
a
o
o
o
o
o
o
a
o
o
o
a
o
o
o
o
o
o
o
o
o
O
a
o
o
o
o
O
o
o
o
o
o
o
o
O
o
8-2
Table
8-2
Characlerlstic
Input lmpedance
R€tum
Loss
5
MHz
to
800
MHz
800
MHz
to
1000
MHz
Maximum
Input
L€vel
Center Frequency
Operating
Rang€
Static Resolution
Bandwidth
Frequency
Response
5 MHz
to 1000
MHz
Coaxial
Input
1
MHz
to
5
MHz
Reference
Level
Range
Calibrator
Output
(cAL
OUT)
Level
Output lmpedance
Supplemental
Informaton
75(}
17
dB
(1.35:1
VSWR)
13
dB
(1.6:1
VSWR)
with
>10
dB
attenuation
+78
dBmV,
100
(dc
f
peak)
Vo.
maximum
1 MHz to 1000
MHz
300 kHz resolution
filter replaces
the
standard
instrument
100
kHz filter.
Frequency response
is
measured
with
)10
dB RF
attenuation.
The
response
figure
includes
the
effects of:
.
input
vswr
r
gain
variations
Variations in
display flatness
contribute
about 1
dB to the response
figure.
Typically <3
dB down from
the
5 MHz r€sponse,
-68
dBmV to
+89
dBmV
+99
dBmV
is
achievable
in
the
reduced
gain
mode.
100
MHz
comb
of markers
provide
amplitude calibration.
Phase locked
to
frequency
reference.
75o nominal