10
Internal LF and Pulse Generators (Option 27)
An internal pulse generator and two internal waveform generators are added, one provid-
ing a frequency or phase modulating signal and the other an amplitude modulating signal.
This Internal LF and Pulse Generators option can only be ordered in combination with
either FM/
Φ
M, AM, or Pulse options, 12, 14, and 26 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 10 MHz sinusoidal
0.1 Hz to 1 MHz square-wave, triangle, ramps
Resolution:
0.1 Hz
Accuracy:
Same as instrument timebase ±0.014 Hz
Waveform Outputs:
Two BNC connectors on the rear panel, FM/
Φ
M OUT and AM OUT
Pulse Modes:
Singlet, doublet, triplet, quadruplet
Pulse Triggers:
Free-run, triggered, gated, delayed, triggered with delay, swept-delay
Pulse Inputs/Outputs:
Video pulse and sync out, rear-panel BNC connectors
①
For 50 and 67 GHz units, overshoot >40 GHz is 20% typical at rated power.
②
Period must be longer than the sum of delay and width by 5 clock cycles minimum.
③
Rise time and Pulse Width Compression, >20 GHz, degrades by 2 ns,
with High Power Option 15.
* Typical
Amplitude Modulation (Option 14)
Option 14 adds amplitude modulation, driven externally via a rear panel BNC connector 50 Ω.
For internal modulation, add Internal LF and Pulse Generators Option 27.
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:
Reading ±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, 50 Ω input impedance.
For internal modulation, add LF Generator Option 27.
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:
±1Vpk
Pulse Modulation (Option 26)
Option 26 adds pulse modulation, driven externally via a rear panel BNC connector, TTL.
For internal modulation, add Internal LF and Pulse Generators Option 27.
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 (>70 dB with high power Option 15)
Minimum Leveled Pulse Width:
100 ns,
≥
1 GHz
1 µs, <1 GHz
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
External Input:
Rear-panel BNC. For internal modulation, add Pulse Generator Option 27
Drive Level:
TTL compatible input
Input Logic:
Positive-true or negative-true, selectable from modulation menu.
Pulse
Parameter
Selectable Clock Rate
Narrow (100 MHz)
Wide (10 MHz)
Pulse Width
10 ns to 160 ms
100 ns to 1.6 s
Pulse Period
②
100 ns to 160 ms
600 ns to 1.6 s
Variable Delay
Singlet
0 to 160 ms
0 to 1.6 s
Doublet
100 ns to 160 ms
300 ns to 1.6 s
Triplet
100 ns to 160 ms
300 ns to 1.6 s
Quadruplet
100 ns to 160 ms
300 ns to 1.6 s
Resolution
10 ns
100 ns
Accuracy
10 ns (5 ns typical)
10 ns (5 ns typical)
Frequency
Range
Rise and Fall
Time
(10% to 90%)
Overshoot
Pulse Width
Compression
Video
Feedthrough
≥
10 to <31.25 MHz
(Opt. 4)
400 ns*
33%*
40 ns*
±70 mV*
≥
31.25 to <125 MHz
(Opt. 4)
90 ns*
22%*
12 ns*
±130 mV*
≥
125 to <500 MHz
(Opt. 4)
33 ns*
11%*
12 ns*
±70 mV*
≥
500 to <2200 MHz
(Opt. 4)
15 ns*
10%
12 ns*
±50 mV*
≥
10 to <1000 MHz
(Opt. 5)
15 ns, 10 ns*
10%
8 ns*
±30 mV*
≥
1 to <2 GHz
(Opt. 5)
10 ns, 5 ns*
10%
8 ns*
±30 mV*
≥
2 to 67 GHz
③
10 ns, 5 ns*
10%
①
8 ns*
±30 mV*
