(5) COMMON
MODE
REJECTION
(11)
OUTPUT
VOLTAGE
FREQUENCY
FOR
GAIN
>
200 FOR GAIN < 200
10
volts
pk-pk ahead of 600 ohms.
dc
to
100
Hz
120
dB
(min)
100 dB
(min)
(12)
OUTPUT
IMPEDANCE
1 kHz
100
dB
80
dB
10
kHz 80 dB
60 dB
600
ohms.
100
kHz 60
dB 40 dB
(13)
OVERLOAD
RECOVERY
(6) GA|N
Resets
immediately
with spring-loaded
front-panel
toggle.
See
Figure
Ill-2 for characteristic recovery
x10
to
x104
calibrated gain settings. Accuracy of
data-
calibrated
gains
is i2% when gain
vernier
is in the (14)
P()\/\/ER REQU|RE|\/|E|\|TS
calibrate position.
Gain
vernier
provides
uncalibrated
gain F8099 eXl3>an$i0n
01 LID ‘£0
X2-5(fT\ilmUm)-
(a) Rechargeable
nickel-cadmium batteries provide
approximately
30
hours
operation bet\/veen
(7)
FREQUENCY RESPONSE
charges.
A
front-panel,
three-position, spring-
loaded
toggle
switch and test lamp
permit
test
of
Rolloff frequencies
are switch
selectable.
Front
panel each of the -[W0 in-[ema|
bat-(erie5_
switch markings
indicate 3
dB point of 6 dB/octave
rolloff curve.
Rolloffs
are selectable as
follows:
(b) AC |ine
Operation; 195-125 \/ ac
or 210-259 \/
ac, 50-60
Hz, 5
watts. Internal
batteries
will
(8) I-OW FFBQUBHCVI
d¢ P050100
and 0-03 HZ ‘E0 I recharge automatically
while unit
is connected
to
kHz
positions
in
1-3-10 sequence.
ac power line_
(b) High Frequency:
3 Hz to
300
kHz
in
1-3-10
(15)
DIMENSIONS
sequence.
8.6" W
x 4.1" H x11.3"
D (21.8 cm
x
10.4
cm x 28.7
(8)
NOISE
cm).
At
10
Hz
with
a 2 megohm source impedance, noise
(16) WEIGHT
figure
is
0.3
dB
maximum. At 1 kHz
with
a 1
megohm
source impedance,
noise figure
is
0.2 dB
maximum.
4 pounds
(1.8
kg).
See Section
Ill for
further
discussion
and
noise figure
contours.
(17) ACCESSORIES
(9) DC DRIFT
If
the
source
impedance
is less than 100 ohms, best
low-noise
performance will be
obtained
if a
Model
(a) Referred
to input (dc coupling):
maximum
10
AM-1,
AM-2,
or 190 input transformer
is
used. Both
‘I-IV/QC Or
I688 than
10
/1V/24
hours at constant
the
AM-1
and the
AM-2 have
1:100
turns
ratios. The
ambient
temperature. A
front
panel screwdriver AM-1 has a 3 dB
bandwidth Qf fr()m 1 kHz
to 10 kHz
control provides
for dc Zeroing.
at 10 ohms
source
impedance,
and the
AM-2 has
a
bandwidth of
from
1 kHz to
150
kHz with
a 1
ohm
(bl Referred
to Output: less than 1 mv/CC’
or less
source.
The
Model
190 has a
1:10:100 turns
ratio. The
than 1 mv/24
hours at Constant ambmnt
tern‘ three dB
bandwidth is
from
0.25
Hz to
500
Hz with a
peratum
1 ohm source. See Section
lll
for further details
regarding
these transformers.
(10)
DISTORTION
Flanges
are available
for mounting on a single
unit or
two units side by
side in a
19" relay rack.
See
Typicaldistortion
is
less
than 0.01%.
Subsection III-12 for
the part numbers
of
these
flanges.
I-2
(5) COMMON MODE REJECTION
FREQUENCY
dc
to
100 Hz
1 kHz
10
kHz
100
kHz
(6)
GAIN
FOR
GAIN>
200
120 dB (min)
100
dB
BOdB
60
dB
FOR
GAIN
< 200
100 dB (min)
BO
dB
60 dB
40 dB
x10
to
X104
calibrated gain settings. Accuracy
of
calibrated gains
is
±2% when gain vernier
is
in the
calibrate position. Gain vernier provides uncalibrated
gain range expansion
of
up
to
x2.5
(minimum).
(7)
FREQUENCY
RESPONSE
Rolloff
frequencies
are
switch selectable.
Front
panel
switch markings indicate
~
dB
point
of
6 dB/octave
roll
off
curve.
Rolloffs
are
selectable
as
follows:
(a)
Low
Frequency:
dc
position
and
0.03 Hz
to
kHz
positions in 1-3-10 sequence.
(b) High Frequency: 3 Hz
to
300
kHz in 1-3-10
sequence.
(B)
NOISE
At
10 Hz
with
a 2 megohm source impedance, noise
figure
is
0_3
dB maximum_
At
1 kHz
with
a 1 megohm
source impedance, noise figure
is
0.2 dB maximum_
See
Section
III
for
further
discussion and noise figure
contours.
(9) DC
DRIFT
(a)
Referred
to
input
(dc coupling):
maximum
10
"IlV/C
or
less
than
10
IlV/24
hours at constant
ambient temperature. A
front
panel screwdriver
control
provides
for
dc
zeroing.
(b) Referred
to
output:
less
than 1
mV/C,
or
less
than 1
mV/24
hours at constant ambient tem-
perature.
(10)
DISTORTION
Typical
distortion
is
less
than 0.01%.
1-2
(11)
OUTPUT
VOLTAGE
10 volts pk-pk
ahead
of
600 ohms.
(12)
OUTPUT
IMPEDANCE
600 ohms.
(13)
OVERLOAD
RECOVERY
Resets
immediately
with
spring-loaded front-panel
toggle.
See
Figure
111-2
for
characteristic recovery
data.
(14) POWER
REQUIREMENTS
(a)
Rechargeable nickel-cadmium batteries provide
approximately 30 hours operation between
charges. A front-panel, three-position, spring-
loaded toggle switch
and
test lamp
permit
test
of
each
of
the
two
internal batteries.
(b)
Ac
line operation: 105-125 V
ac
or
210-250 V
ac,
50-60 Hz, 5 watts. I nternal batteries
will
recharge automatically
while
unit
is
connected
to
ac
power line.
(15) DIMENSIONS
B.6"
W x
4.1"
H x
11.3"
D (21.B cm x 10.4 cm x 2B.7
cm).
(16)
WEIGHT
4 pounds (1.B kg).
(17) ACCESSORIES
If
the source impedance
is
less
than 100 ohms, best
low-noise performance
will
be
obtained
if
a Model
AM-1, AM-2,
or
190
input
transformer
is
used. Both
the AM-1 and the AM-2
have
1: 100 turns ratios. The
AM-1
has
a 3 dB bandwidth
of
from
1 kHz
to
10 kHz
at 10 ohms source impedance,
and
the AM-2
has
a
bandwidth
of
from
1 kHz
to
150
kHz
with
a 1 ohm
source. The Model 190
has
a 1: 1 0: 1
00
turns ratio. The
three dB bandwidth
is
from
0.25 Hz
to
500
Hz
with
a
1 ohm source.
See
Section
III
for
further
details
regarding these transformers.
Flanges
are
available
for
mounting
on a single
unit
or
two
units side by side in a
19"
relay rack.
See
Subsection
111-12
for
the part numbers
of
these
flanges.
J
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