Tektronix 1L20, Инструкция по эксплуатации

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SECTION 1
CHARACTERISTICS
The Type 1L20 Spectrum Analyzer described in this manual
is designed for use in Tektronix oscilloscopes for the panor­
amic presentation of RF signals in the frequency range of 10
MHz to 4200 MHz. The analyzer displays the frequency
distribution o f the applied signal along the horizontal axis
of the oscilloscope CRT and displays the signal energy on
the vertical axis.
The analyzer is designed for use in all Tektronix 530-,
540-, 550-, and 580-1Series Oscilloscope. The analyzer
plugs directly into the oscilloscope and derives all its power
from the oscilloscope. The Type 1L20 can also be used in
an external Plug-In Unit Power Supply such a t the Tektronix
Type 127 and Type 132 Power Supplies when provided with
a 100 volt sawtooth signal.
The following electrical characteristics apply a t an ambi­
ent temperature o f 25° C ( ± 5 ° C) after an initial warmup
period of 20 minutes.
*A Tektronix Type 81 Plug-In Adapter must be used with 580-Series
Oscilloscopes.
CHARACTERISTICS
C haracteristic P erform ance Requirement
S upplem ental In fo rm a tio n
Input Frequency
Range 10 MHz to 4200 MHz— See Table 1-1
Sensitivity — See Table 1-1
Dial Accuracy ± (2 MHz + 1 % of dial reading)
Dispersion
kHz/CM RANGE
Range
1 kHz/cm to 500kHz/cm and 0 dispersion
In 1-2-5 sequence
Accuracy ± 3 %
Linearity
± 3 %
M H z/C M RANGE
Range
.2M H z/cm to lO M H z/cm
In 1-2-5 sequence; useful dispersion
limited to .2-5M Hz/cm in Band 1
Accuracy
See Table 1-2
Linearity ± 3 %
Sweep Latch-up
Sweep latch-up can not occur at any kHz/
CM DISPERSION setting when the IF CENTER
FREQ control is within ± 1 major division of
000 (midrange).
TABLE 1-1
S ensitivity2
Band
RF CENTER
FREQ in MHz
1 kHz RESOLUTION 100 kHz RESOLUTION
Remarks
1 10-275 - 1 0 0 dBm (2.2 fxV) - 8 0 dBm (22.5 /xV)
For Bands 2-5, FINE FREQ con-
2 275-900 - 1 1 0 dBm (0.7 /iV) - 9 0 dBm (7.0 ^V)
trol must be turned fully clock­
wise, MIXER PEAKING set for
3 850-2000 — 100 dBm (2.2 /
a
V) —80 dBm (22.5 ju.V)
optimum signal.
4 1950-3100 —95 dBm (4.0 ju.V) - 7 5 dBm (40 ^V)
5 3000-4200 —90 dBm (7.0 /
a
V) - 7 0 dBm (70.0 ^V)
250 S2 load impedance; all voltages are RMS.
TABLE 1-2
DISPERSION/CM
Remarks
Setting Accuracy
10 MHz ± 3 % (± 0 .3 MHz/cm)
Over the 50 MHz range of the IF CENTER FREQ control. The DIS-
5 MHz ± 3 % (± 0 .1 5 MHz/cm)
PERSION CAL adjust can be reset to improve the accuracy a t a
2 MHz ± 5 % (±0.1 MHz/cm) specific IF CENTER FREQ control setting by using the front panel
1 MHz ± 7 % ( ± 7 0 kHz/cm)
1 MHz CAL MARKERS OUT as a calibration signal.
.5 MHz
± 1 0 % (± 5 0 kHz/cm)
.2 MHz
± 1 5 % (± 3 0 kHz/cm)
1 -1