NF WF1973, Инструкция по эксплуатации

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3.2 I/O Terminals
15
WF1973/WF1974
• Gate of gated oscillation
)
p. 115.
• Triggered gate oscillation trigger
)
p. 120.
• Sequence oscillation start trigger
)
“6.2 Basics” in the Application Instruction Manual
TRIG IN can also be used as the external modulation input for FSK and PSK
)
p. 73
■
Input Characteristics
3.2.5 External 10 MHz frequency reference input (10 MHz REF IN)
10 MHz REF IN can be used for the following purposes.
■ When frequency accuracy higher than the frequency accuracy specification of the
equipment is required, or when the frequency reference of a different signal generator is
desired
Input the 10 MHz reference signal output from an external frequency standard or another
signal generator.
Enable external frequency reference setting.
)
“5. USING EXTERNAL FREQUENCY REFERENCE” in the Application Instruction
Manual
■ To unify the frequency and phase for multiple WF1973, WF1974 units
Connect the frequency reference output of the master unit when multiple units are
combined in synchronous connection, or the master WF1973 or WF1974, to the external 10
MHz frequency reference input of the WF1973 or WF1974.
Set the frequency setting of each unit to the same value.
Also enable external frequency reference setting for the slave units and perform phase
synchronization with the master unit.
)
“4. SYNCHRONIZING MULTIPLE UNITS” in the Application Instruction Manual
The frequency accuracies of the connected WF1973 and WF1974 units are all the same as
that of the master unit.
An external frequency standard can also be used for the master unit.
■ Input Characteristics
Input voltage TTL level (low: 0.8 V or lower; high: 2.6 V or higher)
Maximum allowed input −0. 5 V to +5.5 V
Input impedance 10 k
Ω
, pull up to +3.3 V
Signal GND Same potential as housing
Input voltage 0.5 Vp-p to 5 Vp-p
Maximum allowed input 10 Vp-p
Input impedance
1 k Ω , AC coupled
WF1974 WF1973
10MHz REF IN
[Insulated from housing] 10MHz REF IN
[Insulated from housing]