Tektronix 1L30, Instruction Manual

Page: 10 / 129

Operating Instructions-—Type 1L30
- i
POS— Controls the ver­
tical position of the dis­
play.
CAL — Adjustment to
calibrate the midrange
position of the IF CEN­
TER FREQ.
Fine— 1 turn control for
fine adjustment of the
IF center frequency.
DISP CAL— Adjustment
to match the oscillo­
scope sweep amplitude
to the analyzer disper­
sion.
DISP BAL— Adjusted to
balance the dispersion
center of the MHz/CM
and the kHz/CM posi­
tions of the DISPERSION
RANGE switch.
DISPERSION RANGE—
Selects the MHz or kHz
range of the DISPER­
SION control.
DISPERSION — Selects
the frequency width or
display window.
COUPLED RESO LU­
TION— Selects the reso­
lution bandwidth of the
analyzer. Pull the knob
and turn to uncouple
from the DISPERSION.
VIDEO FILTER— Restricts
the video bandwidth to
reduce high frequency
response and filte r out
noise.
GAIN— Varies the ver­
tical gain of the Spec­
trum Analyzer.
IF ATTEN dB— Series of
calibrated attenuation
steps.
FINE RF FREQ — Fine
tuning adjustment of the
local oscillator to set
phase lock operation.
RF CENTER FREQ— Con­
trol tunes the local os­
cillator and the dial.
Dial indicates the cen­
ter frequency of the dis­
play when the IF CEN­
TER FREQ controls are
centered.
LOCK CHECK— Push the
button to check and set
phase lock operation.
REF FREQ Selector— Se­
lects the source
(I NT
or EXT) for phase lock
operation.
Phase Lock Connector—
Used to apply an exter­
nal reference frequency
to the phase lock cir­
cuits or to provide an
outlet for the internal
1 MHz reference fre­
quency markers which
may be used to eoli
brate the dispersion.
MIXER PEAKING — Op­
timizes the conversion
action of the mixer.
RF INPUT— Input sig
nals < — 30 dBm rec­
ommended, ± 1 5 dBm
maximum.
TO RECORDER— Jack
provides an output for
recorders, etc.
VIDEO INPUT — BNC
connector to apply video
input signals to be dis­
played as a convention­
al (time domain) dis­
play.
VERTICAL DISPLAY— Se­
lects d is p la y mode.
LOGarithmic, LI Near,
SQuare LAW (power)
or VIDEO.
SWEEP INPUT — BNC
connector for applying
the sawtooth waveform
(100 V or 150 V) from
the associate oscillo­
scope.
Fig. 2-3. Function of front panel controls and connectors.