Accuracy
at 1 kHz
external modulation
1 dB bandwidth
3 dB bandwidth
Carrier frequency offset
Distortion
Modulation
source
Group delay
WIDEBAND
FM
Deviation
Indication
Selection
Input level
Accuracy
3 dB bandwidth
Modulation source
Group Delay
In normal mode: ±5% of indication ±10 Hz excluding residual
FM.
With
ALC off, the modulation is calibrated for an input
level
of
1.0
V
PD RMS sine wave.
In low
noise mode: ±6% of indication ±1 Hz excluding residual
FM.
DC
to 300 kHz (DC coupled).
10 Hz to 300 kHz (AC
coupled).
Typically 500 kHz.
Bandwidth is limited
to 100 kHz in low noise mode.
Typically greater than 1 MHz.
Capable of accepting
external sources
of
FSK
signals.
In DC FM mode less than
±(1
Hz + 0.1% of set deviation) after
using DC FM nulling
facility.
Using external
modulation without ALC:
Less than 3% at maximum deviation for modulation frequencies
up to 20 kHz.
Less than 0.3% at
10%
of maximum deviation for modulation
frequencies up to 20 kHz.
Internal LF generator
or
external via front panel sockets.
Less than ljis, 3 kHz
to
500 kHz.
In low
noise mode less than
3
{is, 3
kHz
to 250 kHz.
A rear panel input on a BNC connector allows an external
modulation
signal to produce up to the
maximum deviation.
The
deviation
is controlled in 3 dB steps only and the generator will
display the deviation equivalent
to
1 V RMS sine wave
input.
3 digits with annunciators.
By keyboard entry of
data.
The sensitivity is controlled
in 3
dB
steps
and the display
will indicate the
value
of
deviation
nearest
to the requested value.
1 V RMS sine wave to achieve indicated deviation.
As
FM.
In normal noise
mode typically 10 MHz (DC or AC coupled).
In low noise modes typically 250 kHz (DC or AC coupled).
External
via
rear panel socket
(50
Q impedance).
Less than
0.5
{is, 3 kHz to 10 MHz.
46882-074C
1-9
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