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Connectors
Chapter 9
282
Connectors
10 MHz REF OUT
This connector furnishes a 10 MHz reference for external instruments.
Operating Considerations
Waveform = sinewave
Output frequency = 10 MHz
Output level >0.5 V rms
Output impedance approximately 50 Ω.
NOTE The reference output frequency is always 10 MHz, independent of the selected input
reference frequency.
16 × CHIP CLOCK 19.6608 MHz OUT
This output provides a 19.6608 MHz (16 times the CDMA chip rate) square wave with a
60% duty cycle. This signal comes from the CDMA frame clocks.
Operating Considerations
Nominal output level = TTL
Output impedance = 50 Ω
ANALOG MODULATION IN
This connector provides an external modulation connection to the RF generator.
Operating Considerations
The Mod In To field of the RF GENERATOR screen sets the type of modulation (AM or
FM).
The FM Coupling field on the RF GENERATOR screen selects ac or dc coupling of this
signal for FM operation.