Fluke 9500B - Ref Frequency Input; Ref Frequency Output; Aux in

4.2-2 Section 4: Using the Model 9500B — Interconnections
Final Width = 215mm
Descriptions assume 9500B/1100
4.2.3 AUX IN (Rear Panel)
Despite the huge flexibility if the 9500B, it is
sometimes desirable to apply signals from
user's equipment to the inputs of a UUT
oscilloscope, for specific calibration or test
purposes.
With the 9500B Auxiliary Input selected,
wideband passive routing is available from a
rear-panel 50Ω SMA input through to the
selected 9500B channel output, using 9500B
front panel controls.
No trigger pickoff is provided, and internal
triggers are not available.
4.2.4 REF FREQUENCY INPUT
A BNC connector on the 9500B rear panel
accepts reference frequency inputs from 1MHz
to 20MHz in 1MHz steps, from a TTL source,
to enhance the 9500B internal clock.
4.2.5 REF FREQUENCY
OUTPUT
A BNC connector on the 9500B rear panel
provides a reference frequency output at either
1MHz or 10MHz, from a 50Ω source (VSWR
< 1.2 to 100MHz). This can use the 9500B
internal clock to enhance the frequency
accuracy of other devices.