vide indication of sweep
Same as RF unit frequency
End-point accuracy . . . . .
duration on slower sweep
accuracy.
times.
Sweeps upward in frequency,
F sweep . . . . . . . . . . .
Direct-coupled sawtooth zero
* Sweep output --------
centered on CW setting.
to approx. +15 v, concur-
Continuously adjustable from
Width . . . . . . . . . . . . . . .
yent with swept RF output.
zero to 10% of the fre-
Zero at start of sweep, ap-
quency band; calibrated
proximately +15 v at end
directly in MHz.
of sweep, approximately
10% of F being awept
Width accuracy . . . . . .
+15 v at end of sweep re-
1% of maximum. F
gardless of sweep width
(20%, 2% respectively
or direction.
imped-
with 8691A/B RF unite).
ance, 10,000 ohms.
Frequency linearity . . .
(Correlation between fre-
Same as RF unit frequency
Center-frequency
quency and both the sweep
accuracy.
accuracy.
output).
and reference
Two frequency markers, in-
Frequency markers . . . . .
Same as RF unit frequency
dependently adjustable
accuracy.
over the entire frequency
..... .
* Blanking
RF automatically turned off
range, amplitude modulate
during retrace, turned on
the RF output. Amplitude
after completion of retrace
is adjustable from the
On automatic sweeps, RF
front panel. The markers
is on long enough before
are also available for ex-
eweep starts to stabilize
ternal use.
external circuits and equip-
Accuracy . . . . . . . . . . . .
1% of full scale for all RF
ment whose response is
units.
compatible with the selec-
Better than 0.05% of RF unit
Resolution . . . . . . . . . . .
tad sweep rata. Blanking
disable switch provided.
* Marker output . . . . . .
Triangular pulse, typically
Blanking automatically dis-
-6 v peak into 1000-ohm
abled for power meter
load.
leveling.
CW operation . . . . . . . . . .
Single-frequency RF output
Direct-coupled
* Blanking output . . . .
rectragular
selected by START/CW or
pulse approximately -4 v
MARKER 1 control, de
coincident with RF blank-
pending upon sweep func-
ing. Source impedance ap-
tion selected.
proximately 3000 ohms.
Accuracy . . . . . . . . . . .
Same as RF unit frequency
For uze with X-Y graphic
* Pen lift . . . . . . . . . .
accuracy.
recorderz. Penlift terminals
shorted during sweep, open
Preset frequencies . . . .
Start-stop sweep end pointa
during retrace.
and marker frequencies can
be used aS four preset CW
Internal dc-coupled leveling
* Power leveling
frequencies.
amplifier provided.
amplifier.
Approximately -20 to -350
Crystal input . . . . . . . .
Sweep mode:
mv for specified leveling at
Auto . . . . . . . . . . . . . . . .
Sweep recurs automatically.
rated output; for use with
Manual . . . . . . . . . . . ..
Front panel control providea
negative-polarity detectors.
continuous manual adjust
* Modulation:
ment of frequency between
Square wave modulation con-
Internal AM. . . . . . . . .
end frequencies act in any
tinuously adjustable from
of the above sweep func-
950 to 1050 Hz on all sweep
tions.
times. On/off ratio greater
*Triggered . . . . . . . . . .
Sweep is actuated by front
than 20 db at rated output.
panel pushbutton or by
External AM:
externally applied signal
<-25 v peak, >1 sec
DC to 350 kHz unleveled,
Frequency response
pulse width, and >0.1 v/
DC to 50 kHz leveled.
sec rise.
-10 v reduces RF output
sensitivity . . . . . . . . .
level at leazt 20 db below
Sweep characteristics:
mted CW output.
Sweep time . . . . . . . . .
Continuously adjustable in
Approximately 1000 ohnm
Input impedance . . .
four decade ranges, 0.01
to 100 seconds. Can be
External FM:
synchronized with the pow-
DC to 3 kHa.
Frequency reeponze
erline frequency.
Deviation from CW setting
Sensitivity . . . . . . . . .
* Sweep indicator . . .
appmximatily 67c of the
Front panel indicator lights
frequency band per volt-
during the sweep to pm-
5
