PHASE MODULATION
(Normal mode only)
r
7
[
Deviation 0 to 10 radians in 0.01 radian steps.
Selection By keyboard entry of data. Variation by
IF/11
keys and by rotary
control.
Indication
3
digits with annunciators.
Resolution 0.01 radians.
Accuracy
at
1 kHz Better than ±5% of indicated deviation excluding residual phase
modulation.
3
dB
bandwidth
100 Hz to 10 kHz.
Distortion Less than 3% at maximum deviation at 1 kHz modulation rate.
Modulation source Internal LF generator or external via front panel sockets.
AMPLITUDE MODULATION
For carrier
frequencies up to
1 GHz (and for output levels
less than +13 dBm with
Option
003):
Range 0
to
99.9% in 0.1% steps.
Selection
By keyboard
entry of data. Variation
by IF/11
keys and by
rotary
control.
Indication
3
digits with annunciator.
Depth accuracy
at 1
kHz ±4% of setting ±1%. Usable to
5.4
GHz.
Envelope distortion For a modulation rate of 1 kHz:
Less than 1% total harmonic
distortion for depths
up
to
30%.
Less than
3%
total harmonic distortion for depths up to 80%.
Modulation
source Internal LF
generator or external via front panel sockets.
External
AM accuracy With
ALC
off the modulation is calibrated for an input level of
1 .0 V PD RMS sine wave.
External AM 1 dB
bandwidth
With modulation ALC off; DC to 30 kHz in DC coupled mode
and 10 Hz to 30 kHz in AC coupled mode. Typical modulation
bandwidth exceeds 50 kHz.
Modulation bandwidth is limited to 1.5 kHz in low noise mode 1.
MODULATION OSCILLATOR
Frequency range 0.1 Hz to 500 kHz (sine wave).
Selection By keyboard entry of data. Variation by 11711 keys and by rotary
control.
1-10
46882-074C
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