VOLTAGE RANG E:
DEcmEL RANGE:
FREQUENCY RANGE:
ACCURACY:
TERM STABILIT Y:
CALmRATION:
INPUT IMPEDANCE:
SPECIFICATIONS
MODEL 400D/H/L
0. 1 millivolt to 300 volts. Twelve ranges selected with front panel switch.
Full scale readings of:
0. 001
0.003
0. 010
0.030
0. 100
0.300
1.000
3.000
10. 00
30.00
100.00
300 .
.
00
-72
to
+
5
2
db, in 12 ranges.
10 cps to 4 mc/so
At nominal line voltage
±1O%.
Overall accuracy is within:
MODEL 400D:
±2%
of full scale, 20 cps to
I
mc;
±
3
%
of full scale, 20 cps to
2
mc;
±5%
of full scale, 10 cps to 4 mc.
MODEL 400H:
± 1%
of full scale, 50 cps to 500 kc;
±2%
of full scale, 20 cps to 1 mc;
±3%
of full scale, 20 cps to
2
mc;
±5%
of full scale, 10 cps to 4 mc.
MODEL 400L:
±2%
of reading or
±l%
of
full scale whichever is more
accurate, 50 cps
to
500 kc.
±3%
of reading or
±2%
of full scale whichever is more
accurate, 20 cps to
I
mc.
±4%
of reading or
±3%
of full scale whichever is more
accurate, 20 cps
to
2 mc.
±5%
of reading 10 cps to 4 mc.
Reduction in Gm of amplifier tubes to
75%
of nominal value results in
error of less than 0. 5
%
, 20 cps to
I
mc.
MODELS
400D and 400H:
Reads rms value of sine w ave. Voltage in
dication proportional to average value of ap
plied wave. Linear voltage scales 0 to 3.0
and 0 to
1.
0; db scale,
-12
db to
+
2
db, based
on 0 dbm
=
1 mw in 600 ohms;
10 db intervals
between ranges.
MODEL 400L:
Calibrated in the rms value of a sine wave. Logarithmic
voltage scales 0.3 to
I
and
0.8
to 3. Linear db scale,
.-10 db
to
+
2
db, based o n 0 db
=
1 mw in 600 ohms, 10
db
intervals between ranges.
10
megohms shunted
by
15
1J.J1.f
on ranges 1. 0 volt to 300 volts;
25
J.1.I..Lf
on
ranges
O.
001 volt to
O.
3 volt.
