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Standard Standard Option 1E6

> 3.2 GHz 500 MHz to 3.2 GHz 10 MHz to 3.2 GHz

On/off ratio 80 dB 80 dB (typical) 80 dB

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

Pulse width

Internally leveled ≥ 1µs ≥ 2 µs (typical) ≥ 1µs

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

(ALC Off with power search)

Repetition frequency

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

(typical) (typical) (typical)

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

Level hold ≤ 20 GHz ±0.8 dB ±0.5 dB (typical) ±1.2 dB (typical)

(typical)

(ALC Off with power ≤ 40 GHz ±1.2 dB

search)

(typical)

Width compression ±5 ns (typical) ±50 ns (typical) ±5 ns (typical)

Video feed-through

< 2 mV (typical) < 200 mV (typical) < 125 mV (typical)

Video delay

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

RF delay (Tm)

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

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

≥ 1GHz 10% (typical)

Input level +1 V

peak

= RF On +1 V

peak

= RF On +1 V

peak

= RF On

Input impedance 50 Ω (nominal) 50 Ω (nominal) 50 Ω (nominal)

Pulse modulation

(E8257C only)

1. 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.

2. Option 1E6 provides narrow pulse (20 ns typical) capability between 10 MHz and 3.2 GHz. Narrow pulse

capability above 3.2 GHz is standard.

3. 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.

4. 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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