GENERAL INFORMATION
1-4 46882/439
Performance data
Carrier frequency
Range: 10 kHz to 2.4 GHz with a resolution of 1 Hz.
Accuracy: As frequency standard.
RF output
Range
Individual outputs:
−137 dBm to +24 dBm
(output power above +20 dBm is uncalibrated for carrier frequencies
above 1.2 GHz).
Combined output:
−137 dBm to +4 dBm (settable to +10 dBm)
(output power above 4 dBm is uncalibrated for carrier frequencies
above 1.2 GHz; output power is uncalibrated at all levels for carrier
frequencies below 1 MHz).
Maximum output is reduced by 5 dB when pulse modulation is
selected and/or by up to 6 dB when AM is selected, dependent upon
set AM depth.
Resolution: 0.1 dB.
RF level units:
Units may be set to μV, mV, EMF or PD; dB relative to 1 μV, 1 mV,
EMF or PD; or dBm. Conversion between dB and linear units may be
achieved by pressing the appropriate units key (dB or V, mV, μV).
The output level can be normalized for 75 Ω operation with an external
impedance converter (applies to all outputs simultaneously).
Accuracy:
Up to 1.2 GHz (over temperature range 17°C to 27°C):
RF level
−127 dBm to
+6 dBm
+6 dBm to
+24 dBm
†
Individual outputs ±0.8 dB ±1.0 dB
RF level
>−127 dBm to
+4 dBm
‡
Combiner output ±1.0 dB
Up to 2.4 GHz (over temp range of 17°C to 27°C):
RF level
−127 dBm to
+6 dBm
+6 dBm to
+20 dBm
Individual outputs ±1.6 dB ±2.0 dB
RF level
>−127 dBm to
0 dBm
Combiner output ±2.0 dB
Temp stability <1.2 GHz >1.2 GHz
dB/°C
<±0.02 <±0.04
RF level tracking* (over a temperature range of +17°C to +27°C):
The relative level accuracy between any two or more combined signals
of equal amplitude is typically:
1 MHz−1.2 GHz 1.2 GHz−2.4 GHz
−18 to +4 dBm
±0.3 dB ±0.6 dB
<−18 dBm
±0.6 dB ±1.2 dB
Attenuator hold: Inhibits operation of the step attenuator from the level at which the key
is enabled. Usable for a level reduction of at least 10 dB. Typical
accuracy ±3 dB.
* This specification does not apply to external RF input signals to combiner.
†
Level accuracy is unspecified below 100 kHz for levels greater than +6 dBm.
‡
Level accuracy is unspecified below 1 MHz.
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General