Filter
Top Products
Connectors
Connectors
Chapter 9
286
DATA IN
This connector provides a data input to the CDMA generator.
Operating Considerations
Input level = TTL
Input impedance = 50k Ω
Data Rate = 1.2288 Mcps
DUPLEX OUT
This connector is an output for the RF generator, CDMA generator and tracking
generator.
Operating Considerations
Output impedance = 50 Ω
The RF generator’s output is selected in the Output Port field. This field is available on
the RF GENERATOR, CDMA GENERATOR, and SPEC ANL screens.
CAUTION Connecting a signal of >60 mW (17.78 dBm) to the DUPLEX OUT port can cause
instrument damage (although internal protection circuits can typically withstand a
short-duration signal of several Watts).
If the overpower circuit is triggered (signified by a warning message at the top of the
screen), remove the signal from the DUPLEX OUT port, and reset using
Meas Reset
(press and release the
Shift
key, then the
Hold
key) or turn the Test Set off and on to reset
it.
EVEN SECOND SYNC IN
This port is an input for the even second clock from the base station under test. A
positive edge on this connector starts two timers. One timer, after reaching terminal
counts, starts CDMA frame clocks. The other timer starts pilot PN sequence generation.
The Even Sec In field on the CDMA GENERATOR screen controls this port. See “Even
Sec In” on page 158.
Operating Considerations
Input impedance = 50 kΩ
Input level range = TTL