Filter
Top Products
32
Chapter 2, Making Measurements
Code Domain Timing
Code Domain Timing
Overview Similar to the Code Domain Power test, this measurement shows the timing
relationship between the various Walsh channels and the Pilot channel.
Figure 12
CAUTION: Before performing any transmitter measurements, make sure that the power level applied
to the RF IN/OUT port of the PCS Interface does not exceed the published limit. For
CDMA base station signals this is 1 Watt (+30 dBm). You may have to use an external
attenuator or directional coupler, depending on the power output for your transmitter.
Signal levels greater than the specified maximum can cause damage to the test equipment.
NOTE: The test procedures outlined in this section require that you have already configured the
Test System as outlined in chapter 1, "Getting Started".
Requirements • You must have a means of turning on the base station transmitter and enabling various
Walsh channels (such as Pilot, Sync, Traffic, and Paging).
• Synchronization is required, so you must have an Even-Second clock signal and a
reference timebase (typically 19.6608 MHz) from the base station.
• You must know the following about the base station and setup:
❒ The base station channel number setting.
❒ The PN Offset for the base-station-under-test. If you do not know the PN Offset,
determine it by selecting Search for PN Offset in the main menu.
H
H
RF IN/OUT
SYNTH
REF IN
(Rear Panel)
EVEN SECOND/
SYNC IN
Time Base
Transmitter Port
Even-Second
Clock