SECTION 1 GENERAL
1-11
<Option>
■ Option 01 (Reference crystal oscillator)
● Frequency 10MHz
● Aging rate 5×10
-10
/day
● Temperature characteristics ±5×10
-9
(0 to 50°C)
■ Option 11 (Pulse modulator)
● Frequency 0.125 to 2080MHz
● On/Off ratio >80dB
● Rise/Fall time <100ns
● Min. pulse width <500ns
● Pulse repetition frequency DC to 1MHz
● Max. delay time <100ns
● Overshoot/ringing <20%
● Video feed through <20%
● Pulse modulation signal External, rear-panel BNC connector, 50/600 Ω , TTL (positive logic)
■ Option 21 (AF synthesizer)
● Frequency 0.01Hz to 400kHz (sine wave)
0.01Hz to 50kHz (triangular wave, square wave, sawtooth wave)
● Resolution 0.01Hz
● Waveform Sine, triangular, square, sawtooth
● Frequency accuracy Same as reference oscillator
■ Option 22 (FSK encoder)
● Frequency shift amount: Shifts frequency depending on data state, as below.
(Data2
1
, Data2
0
)=(0, 0): -FM deviation set value
(Data2
1
, Data2
0
)=(0, 1): -FM deviation set value/3
(Data2
1
, Data2
0
)=(1, 0): +FM deviation set value
(Data2
1
, Data2
0
)=(1, 1): +FM deviation set value/3
● Setting frequency: Set frequency for data input in the following timing.
Free: Shift frequency at data input.
Rise Trig: Shift frequency at rising edge of external clock.
Fall Trig: Shift frequency at falling edge of external clock.
● Baseband filter: Following filters can be used to pass signal.
Filter type: 10th-order Besser filter
Cutoff frequency: 100Hz to 30kHz(-3dB)
Set resolution: Upper 2 digits
● FM deviation accuracy: Same as that of MG3641A/MG3642A, with restriction of no baseband filter (by-passed)
● External modulation signal input
Data2
0
: Rear-panel BNC connector (Int Mod Cont 2)
TTL level, pull-down
Data2
1
: Rear-panel BNC connector (Int Mod Cont 1)
TTL level, pull-down
● External clock signal input
Ext Clock: Rear-panel BNC connector (Int Mod Cont 3)
TTL level, pull-up
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