Agilent Technologies E8247C PSG CW - Manual (Page 34)

24 Chapter 1
Signal Generator Overview
Rear Panel
25. SMI (SOURCE MODULE INTERFACE)
This interface is used to connect to compatible Agilent Technologies 83550 Series mm-wave source
modules.
26. 10 MHz OUT
This female BNC connector outputs a nominal signal level of >
+
4 dBm and has an output impedance of
50
Ω
. The accuracy is determined by the timebase used.
27. 10 MHz IN
This female BNC connector accepts an external timebase reference input signal level of >
−
3 dBm. The
reference must be 1, 2, 2.5, 5, or 10 MHz, within
±
1 ppm. The signal generator detects when a valid
reference signal is present at this connector and automatically switches from internal to external reference
operation. The nominal input impedance is 50
Ω
. For Option UNR, this BNC connector accepts a signal with
a nominal input level of 5
±
5 dBm. The external frequency reference must be 10 MHz, within
±
1 ppm. The
nominal input impedance is 50
Ω
with a damage level of
≥
10 dBm
.
28. 10 MHz EFC (Option UNR)
This female BNC input connector accepts an external dc voltage, ranging from
−
5 to +5V, for electronic
frequency control (EFC) of the internal 10 MHz reference oscillator. This voltage inversely tunes the
oscillator about its center frequency approximately
−
0.0025 ppm/V. The input resistance is greater than
1 M
Ω
. When not in use, this connector should be shorted using the supplied shorting cap to assure a stable
operating frequency.