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Specifications
Model 211B
Specifications
50 and 600 ohm
Outputs
SYMMETRY
CONTROL:
Continuously variable
from
25%
-
75% duty cycle.
POLARITY:
Negative
6
PHASE
DIFFERENCE:
180°
between 502 and 600Q
outputs at 50% duty cycle.
50 ohm Output
SOURCE
IMPEDANCE:
approximately 15pF.
PULSE SHAPE:
(Measured at 5 V across 502)
RISE AND FALL
TIMES:
< 5ns
.
OVERSHOOT AND RINGING:
< 5% peak of pulse
amplitude.
PRESHOOT:
<5%
502
+*3% shunted by
AMPLITUDE
MAXIMUM
OUTPUT:
5V
across
502,
10V
across an open circuit. Output circuit protec-
ted, cannot be damaged by shorting.
ATTENUATOR:
Provides
7 steps from 0.05 to
5 Vinal,
2.5, 5 sequence.
VERNIER:
Provides
continuous
adjustment
be-
tweenranges, minimum output less than 0.02V
across
502.
Rotating vernier to minimum
(ccw) may increase preshoot to 10%.
600 ohm Output
SOURCE IMPEDANCE:
6002 410%
PULSE SHAPE
RISE AND FALL
TIMES:
<
70ns
across
6002, less than140ns across anopencircuit.
Decreased
amplitude
setting will improve
rise time.
OVERSHOOT AND RINGING:
< 5%
AMPLITUDE
MAXIMUM OUTPUT:
30 V across
6002,
60 V
across
an open circuit.
ATTENUATOR:
Providescontinuous
adjustment
from
full output to less than 0.3 V across
6002.
1-0
Repetition Rate and Trigger Output
FREE RUN
REPETITION
RATE
502
output:
1 Hz to 10 MHz,
7 ranges
6002 output:
1 Hzto
1MHz,
6 ranges
DIAL CALIBRATION:
1 - 10 (linear)
DIAL ACCURYCY:
+5% to 10 MHz at 50%
duty
cycle.
Variation
of symmetry
control
may
change frequency and additional +5% (10% on
10 MHz range).
PERIOD
JITTER:
< 0.2% at any duty cycle
and
repetition rate setting.
SYNCHRONIZATION
SYNC INPUT:
DC coupled,
sine waves or positive
pulses
from
1 Hz to 10 MHz.
Frequency
of
synchronizing
signal
must be 105% - 140%
of dial setting.
SENSITIVITY:
Willsynchronizeon positive pulses
of at least 1 V, sine waves
of at least
2V
peak to peak.
INPUT IMPEDANCE:
Approximately 5002
TRIGGER OUTPUT
PULSE:
(suitable for synchroni-
zation with another 211B).
WIDTH:
10
(+5) ns at 50% points.
AMPLITUDE:
At least 2 V across 502
TIMING:
Coincident with leading edge of 502 pulse
POLARITY:
Positive or Negative
General
POWER:
115 or 230 V 10% - 15%, 50 Hzto 400 Hz,
23 W.
DIMENSIONS:
WEIGHT:
Net, 9ibs (4kg). Shipping 11 lbs (5kg)
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