Atec Agilent-E8257D - Manual (Page 17)

17
10 MHz to 3.2 GHz Above 3.2 GHz
Width compression ±5 ns (typ) ±5 ns (typ)
(RF width relative to video out)
Video feed-through
1 < 125 mv (typ) < 2 mv (typ)
Video delay (ext input to video) 50 ns (nom) 50 ns (nom)
RF delay (video to RF output) 45 ns (nom) 35 ns (nom)
Pulse overshoot < 15% (typ) < 10% (typ)
Input level +1 V
peak
= RF On +1 V
peak
= RF On
Input impedance 50 Ω (nom) 50 Ω (nom)
Modes Free-run, triggered, triggered with delay,
doublet, and gated. Triggered with delay,
doublet, and gated require external
trigger source.
Period (PRI) (Tp) 70 ns to 42 s
(Repetition frequency: 0.024 Hz to
14.28 MHz)
Pulse width (Tw) 10 ns to 42 s
Delay (Td)
Free-run mode
0 to ±42 s
Triggered with delay and doublet modes 75 ns to 42s with ±10 ns jitter
Resolution 10 ns (width, delay, and PRI)
All modulation types (FM, AM, FM, and pulse modulations) may be simultaneously
enabled except: FM with FM, and linear AM with exponential AM. AM, FM, and FM
can sum simultaneous inputs from any two sources (Ext1, Ext2, internal1, or internal2).
Any given source (Ext1, Ext2, internal1, or internal2) may be routed to only one activated
modulation type.
Measured pulse modulation envelope
Freq = 10GHz, Amp = 10dBM, ALC = OFF, Pulse w
Timebase (nsec)
0 10 20 30 40
Sync
Output
Video
Output
RF Pulse
Output
Td
Tm
Tw
Trf
Vf
Tf Tr
Vor
Tp
50%
50%
10%
90%
50%
Internal pulse generator
(Option UNU or UNW)
1. With attenuator in 0 dB position. Video feed-through decreases with attenuator setting.
Td Video delay (variable)
Tw Video pulse width (variable)
Tp Pulse period (variable)
Tm RF delay
Trf RF pulse width
Tf RF pulse fall time
Tr RF pulse rise time
Vor Pulse overshoot
Vf Video feedthrough
Simultaneous modulation