Anritsu MG3690A manual Amplitude Modulation Option, LF Generator Option, Pulse Generator Option

Amplitude Modulation (Option 14)

All amplitude modulation specifications apply at 50% depth, 1 kHz rate, with RF level set 6 dB below maximum specified leveled output power, unless otherwise noted. Amplitude Modulation is not available <10 MHz with Option 22.

AM Depth (typical): 0-90% linear; 20 dB log

AM Bandwidth (3 dB):

DC to 50 kHz minimum

DC to 100 kHz typical

Flatness (DC to 10 kHz rates): ±0.3 dB

Accuracy: ±5%

Distortion: <5% typical

Incidental Phase Modulation (30% depth, 10 kHz rate):

<0.2 radians typical

External AM Input: Log AM or Linear AM input, rear-panel BNC, 50Ω input impedance. For internal modulation, add LF Generator Option 23.

Sensitivity:

Log AM: Continuously variable from 0 dB per volt to 25 dB per volt.

Linear AM: Continuously variable from 0% per volt to 100% per volt.

Maximum Input: ±1V

LF Generator (Option 23)

Two internal waveform generators are added, one providing

a frequency or phase modulating signal and the other an amplitude modulating signal. This Low Frequency (LF) Generator option can only be ordered in combination with either FM/Φ M or AM options, 12 and 14 respectively.

Waveforms: Sinusoid, square-wave, triangle, positive ramp, negative ramp, Gaussian noise, uniform noise. (Check Option 10 for User-Defined)

Rate:

0.1 Hz to 1 MHz sinusoidal

0.1 Hz to 100 kHz square-wave, triangle, ramps

Resolution: 0.1 Hz

Accuracy: Same as instrument timebase

Output: Two BNC connectors on the rear panel, FM/Φ M OUT and

AM OUT

External Pulse Modulation (Option 13)

Pulse modulation specifications apply at maximum rated power, unless otherwise noted. Pulse modulation is not available <10 MHz with Option 22.

On/Off Ratio: >80 dB

Minimum Leveled Pulse Width:

100ns, ≥ 2 GHz1

1µs, <2 GHz1

Minimum Unleveled Pulse Width: <10 ns

Level Accuracy Relative to CW (100 Hz to 1 MHz PRF):

±0.5 dB, ≥ 1 µs pulse width ±1.0 dB, <1 µs pulse width

Pulse Delay (typical): 50 ns in External Mode

PRF Range:

DC to 10 MHz, unleveled 100 Hz to 5 MHz, leveled

Frequency	Rise & Fall		Pulse Width	Video
Range	Time	Overshoot	Compression	Feedthrough
	(10% to 90%)
≥ 10 to
<31.25 MHz	400 ns*	33%*	40 ns*	±70 mV*
(Opt. 4)
≥ 31.25 to
<125 MHz	90 ns*	22%*	12 ns*	±130 mV*
(Opt. 4)
≥ 125 to
<500 MHz	33 ns*	11%*	12 ns*	±70 mV*
(Opt. 4)
≥ 500 to
<2200 MHz	15 ns	10%	12 ns*	±15 mV*
(Opt. 4)
≥ 10 to	15 ns
<1000 MHz	10 ns*	10%	8 ns*	±15 mV*
(Opt. 5)
≥ 1 to	10 ns
<2 GHz	5 ns*	10%	8 ns*	±15 mV*
(Opt. 5)
≥ 2 to	10 ns	10%2
≤ 65 GHz	5 ns*		8 ns*	±10 mV*

External Input: Rear-panel BNC. For internal modulation, add Pulse Generator Option 24.

Drive Level: TTL compatible input

Input Logic: Positive-true or negative-true, selectable from modulation menu.

Pulse Generator (Option 24)

Modes: Free-run, triggered, gated, delayed, singlet, doublet, triplet, quadruplet.

Parameter	Selectable Clock Rate
	40 MHz	10 MHz
Pulse Width	25 ns to 419 ms	100 ns to 1.6 s
Pulse Period 3	250 ns to 419 ms	600 ns to 1.6s
Variable Delay
Singlet	0 to 419 ms	0 to 1.6 s
Doublet	100 ns to 419 ms	300 ns to 1.6 s
Triplet	100 ns to 419 ms	300 ns to 1.6 s
Quadruplet	100 ns to 419 ms	300 ns to 1.6 s
Resolution	25 ns	100 ns

Accuracy: 10 ns (5 ns typical)

Inputs/Outputs: Video pulse and sync out, rear-panel BNC connectors

Pulse Generator option is not available without Pulse Modulation Option 13.

12.2 GHz with Option 4, DDC.

2For 50 and 65 GHz units, overshoot >40 GHz is 20% typical at rated power.

3Period must be longer than the sum of delay and width by 5 clock cycles minimum.

* Typical

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