Phase Modulation; Amplitude Modulation - Agilent Technologies E4438C Datasheet

Specifications for Analog Modulations

Phase modulation

1, 2
1, 6

Amplitude modulation

[fc > 500 kHz]
1. All analog performance above 4 GHz is typical.
2. For non-Option UNJ units, specifications apply in phase noise mode 2 [default].
3. Refer to frequency bands on page 12 for N.
4. Parentheses denote typical performance.
5. Bandwidth is automatically selected based on deviation.
6. AM is typical above 3 GHz or if wideband AM or I/Q modulation is simultaneously enabled.
7. Peak envelope power of AM must be 3 dB less than maximum output power below 250 MHz.
Resolution 0.1% of set deviation
Modulation frequency response
Standard
Maximum
Mode deviation
Normal BW N x 80 rad
6
High BW N x 8 rad
N x 1.6 rad
With Option UNJ
Maximum
Mode deviation
Normal BW N x 10 radians
High BW N x 1 radians
Deviation accuracy [1 kHz rate, Normal BW mode]
< ±5% of deviation + 0.01 radians
3
Distortion [1 kHz rate, deviation < 80 radians on standard model, < 10 N radians on
Option UNJ models, Normal BW mode]
< 1%
FM using external inputs 1 or 2
Sensitivity 1 V
peak
50 Ω, nominal
Input impedance
Paths FM path 1 and FM path 2 are summed internally for composite
modulation. The FM 2 path is limited to a maximum rate of
1 MHz. FM path 2 must be set to a deviation less than the FM
path 1.
Range 0 to 100%
Resolution 0.1%
Rates [3 dB bandwidth]
DC coupled 0 to 10 kHz
AC coupled 10 Hz to 10 kHz
4, 7
Accuracy 1 kHz rate
4, 7
Distortion [1 kHz rate, THD]
Option 501-504/Option UNJ
30% AM < 1.5%
90% AM (< 4%)
AM using external inputs 1 or 2
Sensitivity 1 V
peak
50 Ω, nominal
Input impedance
Paths AM path 1 and AM path 2 are summed internally for
composite modulation.
3, 4
Allowable rates [3 dB BW]
FM path 1
DC to 100 kHz
(DC to 1 MHz)
(DC to 10 MHz)
Allowable rates [3 dB BW]
FM path 1
DC to 100 kHz
(DC to 1 MHz)
for indicated deviation
< ±(6% of setting +1%)
Option 506
< 1.5%
(< 5%)
to achieve indicated depth
FM path 2
DC to 100 kHz
(DC to 0.9 MHz)
(DC to 0.9 MHz)
FM path 2
DC to 100 kHz
(DC to 0.9 MHz)
13