Chapter 1 33
Signal Generator Overview
Rear Panel
34. PULSE SYNC OUT
This female BNC output connector (functional only with Options UNU or UNW) outputs a
synchronizing TTL–compatible pulse signal that is nominally 50 ns wide during internal and triggered
pulse modulation. The nominal source impedance is 50 ohms. On signal generators without Option
1EM, this connector is located on the front panel.
35. PULSE VIDEO OUT
This female BNC output connector (functional only with Options UNU or UNW) outputs a TTL–level
compatible pulse signal that follows the output envelope in all pulse modes. The nominal source
impedance is 50 ohms. On signal generators without Option 1EM, this connector is located on the
front rear panel.
36. PULSE/TRIG GATE INPUT
This female BNC input connector (functional only with Options UNU or UNW) accepts an externally
supplied pulse signal for use as a pulse or trigger input. With pulse modulation, +1 V is on and 0 V
is off (trigger threshold of 0.5 V with a hysteresis of 10 percent; so 0.6 V would be on and 0.4 V
would be off). The damage levels are ±5 V
rms
and 10 V
p
. The nominal input impedance is 50 ohms.
On signal generators without Option 1EM, this connector is located on the front panel.
37. ALC INPUT
This female BNC input connector is used for negative external detector leveling. This connector
accepts an input of −0.2 mV to −0.5 V. The nominal input impedance is 120 kohms and the damage
level is ±15 V. On signal generators without Option 1EM, this connector is located on the front panel.
38. DATA CLOCK
This female BNC input connector (E8267D only) is CMOS compatible and accepts an externally
supplied data clock input signal to synchronize serial data for use with the internal baseband
generator (Option 601/602). The expected input is a 3.3 V CMOS bit clock signal (which is also TTL
compatible) where the rising edge is aligned with the beginning data bit. The falling edge is used to
clock the DATA and SYMBOL SYNC signals. The maximum clock rate is 50 MHz. The damage levels
are > +5.5 V and < −0.5V. The nominal input impedance is not defined. On signal generators without
Option 1EM, this connector located on the front panel.
39. I IN
This female BNC input connector (E8267D only) accepts the in–phase (I) component an externally
supplied, analog, I/Q modulation. The quadrature–phase (Q) component is supplied through the Q IN
connector. The signal level is = 0.5 V
rms
for a calibrated output level. The nominal input
impedance is 50 or 600 ohms. The damage level is 1 V
rms
and 10 V
peak
. To activate signals applied to
the I and Q input connectors, press
Mux > I/Q Source 1 or I/Q Source 2 and then select either Ext 50 Ohm or
Ext 600 Ohm. On signal generators without Option 1EM, this connector is located on the front panel.
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