Agilent Technologies E8247C PSG CW Instrukcja Użytkownika Pobierz pdf (Strona 11)

Standard Option 1E6

≥ 500 MHz ≥ 500 MHz > 3.2 GHz

to ≤ 3.2 GHz to ≤ 3.2 GHz

On/off ratio 80 dB typical 80 dB 80 dB

Rise/fall times (Tr, Tf ) 100 ns typical 10 ns (8 ns typical) 10 ns (6 ns typical)

Pulse width

Internally leveled ≥ 2 µs typical ≥ 1µs ≥ 1µs

Level hold ≥ 0.5 µs typical ≥ 20 ns typical ≥ 20 ns typical

(ALC Off with power search)

Repetition freq

Internally leveled 10 Hz to 250 kHz 10 Hz to 500 kHz 10 Hz to 500 kHz

typical typical typical

Level hold dc to 1 MHz typical dc to 10 MHz typical dc to 10 MHz typical

(ALC Off with power search)

Level accuracy

(relative to CW)

Internally leveled ±0.5 dB ±0.5 dB ±0.5 dB

(±0.15 dB typical)

Level hold ±0.5 dB typical ±1.0 dB typical ≤ 20 GHz ±0.8 dB typical

(ALC Off with power search)

≤ 40 GHz ±1.2 dB typical

Width compression ±50 ns typical ±5 ns typical ±5 ns typical

Video feed-through

< 200 mV typical < 125 mV typical < 2 mV typical

Video Delay

(Ext input to Video) 40 ns nominal 40 ns nominal 40 ns nominal

RF Delay (Tm)

(Video to RF output) 280 ns nominal 45 ns nominal 35 ns nominal

Pulse overshoot (Vor) < 10% typical < 1GHz 20% typical < 10% typical

≥ 1GHz 10% typical

Input level +1 Vpeak = RF On +1 Vpeak = RF On +1 Vpeak = RF On

Input impedance 50 Ω, nominal 50 Ω, nominal 50 Ω, nominal

Pulse modulation

22 With ALC off, specs apply after the execution of power search. For instruments without a step attenuator,

specs apply between 0 and + 10 dBm. For instruments with the step attenuator, specs apply with Atten Hold

Off, or ALC level between 0 and +10 dBm.

23 Power search is a calibration routine that improves level accuracy in ALC-off mode. Un-pulsed RF power

will be present typically up to 50 ms when executing power search.

24 With attenuator in 0 dB position. Video feed-through decreases with attenuator setting.

Measured pulse modulation envelope

Freq = 10GHz, Amp = 10dBM, ALC = OFF, Pulse width = 50ns

Timebase (nsec)

0 10 20 30 40 50 60 70 80 90 100

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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Agilent Technologies E8247C PSG CW Instrukcja Użytkownika Strona 11

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