Optional 10 Mhz Reference Connection; Checking The Signal - HP 85325A Operating And Service Manual

Optional 10 MHz
Reference Connection
NOTE
Procedure
Installation
Initial Setup
The 10 MHz reference connection (see Figure 1-1 on page 1-3) between the
RF and LO sources locks the signal frequency of the two sources together.
When the sources are separated by a long distance, make sure the 10 MHz
signal is at least -17 dBm or greater at the 10 MHz REF INPUT. The
10 MHz REF OUTPUT produces 0 dBm.

Checking the Signal

You can check to see if a 10 MHz signal is reaching the destination source as
follows:
This procedure assumes at least one source has a front panel.
1. Set up the sources so that they are not under HP 8530 control.
2. Connect the 10 MHz cable between the LO and RF source 10 MHz REF
jacks. Make sure you use the 10 MHz REF IN on the source with a front
panel. (This will be called the receiving unit.)
3. Preset the sources.
4. If is displayed on the bottom-left of the receiving units display,
EXT REF
the signal is satisfactory.
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