Configuring The External Reference Clock - Keysight E8267D User Manual

GPS Modulation (Option 409)
Real Time GPS
The real-time GPS signal is now available at the signal generator RF OUTPUT
connector.
should like after all steps have been completed. Notice the GPS, I/Q, and RF
ON annunciators are on and the parameter settings for the signal are displayed
in the status area of the signal generator display.
This procedure sets up a GPS signal that incorporates a subframe structure
using 10 words, each with 24 raw data bits and 6 parity bits computed from the
data source. The signal generator created this subframe structure when you
selected Enc as the data mode and a PN15 sequence as the data type. The
PN15 sequence was encoded with the C/A code at 50 bps. Using factory
preset settings, the C/A chip rate is 1.023 Mcps with a clock reference of 10.23
Mcps. A 2.5 kHz doppler shift simulates the relative motion of the satellite with
respect to the receiver. For more information on the GPS option, refer to
Time GPS" on page
Figure 8-6 Real Time GPS Setup with Internal Clock

Configuring the External Reference Clock

1. Access the real-time GPS personality (Mode > More(1 of 2) > GPS > Real
2. Press More (1 of 2) > GPS Ref Clk Ext Int to Ext.
3. Press GPS Ref (f0) > 11.03 > kcps.
4. Connect the external reference clock source to the DATA CLOCK INPUT
5. Set the external reference clock source to the chip rate value entered in
248
Figure 8-6 on page 248
243.
Time GPS).
connector.
The maximum clock rate for this input connector is 50 MHz with a voltage
range of
−0.5 to 5.5 V.
step 3.
shows what the signal generator display
Keysight E8357D/67D & E8663D PSG User's Guide
"Real