Fixed (ECL, ECL, TTL) Pulses
Pulse levels for
5On
loading as shown:
ECL
-1
8”
A
-0.9V
.
Em
-,
.8V
--7-r--
-“”
Delay
Pulse occurrence can be delayed from less than 10 ns to
100 ms with respect to the sync pulse. Maximum duty
cycle is 70% for periods to 200 ns, decreasing to 30% for
20 ns periods.
Delay jitter is less than 0.1% plus 50 picoseconds.
ECL, ECL Transition Time: < 6 ns.
TTL
<o
4Vn
>2s4V
.
TTL Transition Time:
<
10 ns.
Sync Pulse
Sync pulse is 0 to at least
+1V
from a
5Oa
source.
Normal/Complement Control
Normal pulse or its complement is selected. The normally
quiescent and active levels are reversed in complement
format. This control affects all outputs except sync pulse.
1.2.3
Time Domain
Period range is from less than 20 ns to greater than 200 ms
External Trigger
in 7 overlapping ranges.
Period jitter is less than 0.1% plus 50 picoseconds.
Width
Width range is from less than 10 ns to 100 ms in 7 over-
lapping ranges. Maximum duty cycle is 70% for periods to
200 ns, decreasing to 50% for 20 ns periods. Range switch
also has a square wave detent
(
%
).
‘L
duty cycle is 50
-
+4% to 2
pus
period changing to
50 +15% at 20 ns period.
Width jitter is less than 0.1% plus 50 picoseconds.
Sync pulse duty cycle is 50
24% of pulse period to 2
pus
period, changing to 50
+I
5% at 20 ns period except in
trigger and external width modes, in which case it is deter-
mined by the trigger signal.
Transition Time
For variable amplitude pulse only. Independently adjustable
leading and trailing edges from less than 7 ns (5 ns typical)
to 250 ms in 7 overlapping decade ranges (measured from
10 to 90% points). Verniers give
50:1
adjustment on all
ranges except 5 ns, which gives 25: 1.
Linearity:
For transition greater than 10 ns
+5% between
10 to 90% points on pulse.
Fixed delay is as shown:
1.2.4
TRIGGER LEVEL
TRIGGER INPUT
FIXED
DELAY4
b
-4Ons
SYNC PULSE
t
1
FIXED DELAY
--+(
k
~20
ns
VARIABLE
AMPLITUDE
PULSE
Input Characteristics
__n-
The external signal required to trigger the generator has a
minimum amplitude of
+200
mV
p-p to 5 MHz increasing
to
k600
mV
p-p to 50 MHz (from
5Oa
source) and a maxi-
mum amplitude of
+lOV
with a minimum width of 10 ns.
Input impedance is approximately
1
ka
in parallel with
22 pF
Triggering is selected to occur at either rising or falling edge
of trigger signal; triggering level is adjustable to be between
+4V.
An LED lights for approximately 100 ms for each
external and manual trigger occurrence accepted.
1.2.5
General
Environmental
Specifications apply at 25°C
*5”C
after
1
hour warm-up.
Instrument will operate from 0°C to 50°C.
Dimensions
28.8
cm (11.4 in.) wide; 17.3 cm (6.8 in.) high; 29 cm
(11.4
in.) deep.
Weight
5.4
kg (12 lb) net; 7.3 kg (16 lb) shipping.
Power
90
to
1
10V,108 to
132V,
180
to220Vor216
to250V;
50to400 Hz;
60 watts nominal.
l-2
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