HP 83206A, Руководство пользователя

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S:\HP83206A\USRGUIDE\MANUAL\connect.fm
Chapter 8, Connector Descriptions
Rear Panel Connectors
NOTE: Using a Frame or 2X Frame Reference: it takes about 30 seconds to lock to a 25 or 50 Hz
reference after connecting the reference signal and selecting the correct setting in the
Reference field. The 200 and 400 Hz selections are a little faster. If the reference signal is
disconnected and then reconnected, you must re-select the reference frequency in the
Reference field to start the phase-locking process over again. If you do not re-select the
reference frequency, it can take hours to re-establish phase lock with these very low
frequency references.
Serial Port
Not used.
Symbol Clk Out
This connector provides an output for the Symbol Clock of the Digital Generator.
This allows you to synchronize external equipment to the Digital Generator.
Operating Considerations
Data Delay is not programmable yet. When using internally generated data, and
the Data Delay value is an even number, the first bit of a symbol is present on the
rising edge of the Symbol Clock. If the delay is an odd number, the second bit of
the symbol is present on the rising edge of the Symbol Clock.
Nominal output frequency = 24.3 kHz
Nominal output = CMOS
Output impedance = 50 Ohms
114.3 MHz IF In
This connector is where the Cellular Adapter receives the 114.3 MHz IF from the
Test Set’s receiver section. It is usually connected to the Test Set’s 114.3 MHz IF
OUT port.
Operating Considerations
Input impedance = 50 Ohms
Input level range = -53 to -30 dBm
Input Bandwidth: The incoming signal goes through a 114.3 MHz bandpass filter
with about 400 kHz 3 dB bandwidth before down-conversion to 700 kHz. A 20
MHz LPF and a 3 MHz LPF provide additional filtering before being analyzed.