GENERAL INFORMATION
1-6
Modulation
Internal and external modulation can be simultaneously enabled to allow combined
amplitude and frequency (or phase) modulation. The pulse modulation can be used in
combination with the other forms of modulation from an external pulse source.
Frequency modulation
Resolution: 1 Hz.
Deviation range: CW range (MHz) Max. deviation (kHz)
1200 to 2510 12800
600 to 1200 6400
300 to 600 3200
150 to 300 1600
75 to 150 800
37.5 to 75 400
18.75 to 37.5 200
0.009 to 18.75 100
Accuracy:
±4% at 1 kHz modulation rate.
Bandwidth (1 dB): DC to 275 kHz (DC coupled),
10 Hz to 275 kHz (AC coupled),
20 Hz to 275 kHz (AC coupled with ALC).
Group delay:
Less than 5 μs to 100 kHz.
Carrier frequency offset (DC
coupled):
Less than 1% of the set frequency deviation.
Distortion: Less than 1% at 1 kHz rate for deviations up to 20% of max. available deviation.
Typically 0.1% for deviations of 2% of max. available deviation and less than 3% at max.
available deviation.
Modulation source: Internal LF generator or external via front panel BNC.
FSK
Modes: 2-level or 4-level FSK.
Data source: External data connected to TRIGGER connector (2-level) or TRIGGER and PULSE
connectors (4-level).
Note that with Option 7 fitted, rear-panel PULSE input is labeled FSK2.
Frequency shift: Settable up to ±100 kHz.
Accuracy: As FM deviation accuracy.
Timing jitter:
±3.2 μs
Filter:
8
th
order Bessel, −3 dB at 3.9 kHz.
Phase modulation
Range: 0 to 10 radians.
Resolution: 3 digits or 0.01 radians.
Accuracy at 1 kHz: ±4% of indicated deviation excluding residual phase modulation.
Bandwidth (3 dB): 100 Hz to 10 kHz.
Distortion: Less than 3% at 10 radians at 1 kHz modulation rate.
Typically <0.5% for deviations up to 1 radian at 1 kHz.
Modulation source: Internal LF generator or external via front-panel BNC.
Amplitude modulation
(for carrier frequenciesup to 2 GHz)
Range: 0 to 99.9%.
Resolution: 0.1%.
Accuracy:
±5% of set depth at 1 kHz rate (at +17°C to 27°C ambient temperature).
Temperature coefficient <±0.02% per °C.
Bandwidth (1 dB): DC to 30 kHz (DC coupled),
10 Hz to 30 kHz (AC coupled),
20 Hz to 30 kHz (AC coupled with ALC).
Distortion: Less than 2.5%* at 1 kHz rate for modulation depths up to 80%;
less than 1.5% at 1 kHz rate for modulation depths up to 30%.
* Less than 3.5% for carrier frequencies above 500 MHz
Modulation source: Internal LF generator or external via front-panel BNC.
To Next Page
Loading...