Keysight E8357D/67D & E8663D PSG User’s Guide 249
GPS Modulation (Option 409)
Real Time GPS
The maximum data rate for this input connector is 50 Mb/s with a voltage
range of
−
0.5 to 5.5 V.
NOTE
The chip rate of the external source must match the chip rate value set using
the
GPS Ref (f0)
softkey.
shows what the signal generator display should look
like after all the steps have been completed. The
CA Chip Rate
,
P Chip
Rate
,
GPS Ref (f0)
, and
GPS Ref Clk
fields in the status area of the display
show the new parameters you set in this procedure. Notice the settings
Satellite ID
,
Doppler Shift
,
Data
, and
Data Mode
, have not changed
from the previous procedure,
“Setting Up the Real Time GPS Signal” on page
.
Figure 8-7
Real Time GPS Setup with External Clock
This procedure used an external source as the reference clock signal. The
reference frequency was changed from the GPS standard of 10.23 Mcps to
11.03 kcps. This change in the reference signal frequency automatically
changed the P and C/A code chip rates. Since the P code chip rate matches
the reference frequency, its chip rate is now 11.03 kcps; the C/A code rate is
one-tenth of the reference frequency and so is now 1.103 kcps. For more
information on the GPS option, refer to
.
Testing Receiver Sensitivity
Refer to
.
1.
Connect the cables between the receiver and the PSG as shown in
