5
AM and scan (8360B only)
Bandwidth (3 dB, 30% depth, modulation peaks
3 dB below maximum rated power): DC to 100 kHz
Modulation depth
(ALC levels noted, can be offset using step attenuator)
Normal Mode: –20 dBm to maximum available power
Deep Mode
14
: 50 dB below maximum available
power
Unleveled Mode
15
: 50 dB below maximum available
power
Sensitivity
Linear: 100%/volt
Accuracy (1 kHz rate, 30% depth, normal mode):
5%
Exponential: 10 dB/volt
Accuracy (normal mode): 0.25 dB ±5% of depth
in dB
Incidental phase modulation (30% depth): 0.2
radians peak, typical
Incidental FM: Incidental phase modulation ´
modulation rate
FM (8360B only)
Locked mode
Maximum deviation: ±8 MHz
Rates (3 dB bandwidth, 500 kHz deviation):
100 kHz to 8 MHz
Maximum modulation index (deviation/rate): n ´ 5
Unlocked mode
Maximum deviation
At rates ²100 Hz: ±75 MHz
At rates >100 Hz: ±8 MHz
Rates (3 dB bandwidth, 500 kHz deviation): DC to
8 MHz
Sensitivity
100 kHz, 1 MHz, or 10 MHz/volt, switchable.
Accuracy (1 MHz rate, 1 MHz deviation): 10%
Simultaneous modulations (8360B only)
Full AM bandwidth and depth is typically available
at any pulse rate or width. FM is completely inde-
pendent of AM and pulse modulation.
Internal modulation generator (Option 002)
AM, FM modulation signals
Internal waveforms: Sine, square, triangle,
ramp, noise
Rate
Range:
Sine: 1 Hz to 1 MHz
Square, triangle, ramp: 1 Hz to 100 kHz
Resolution: 1 Hz
Depth, deviation
Range: same as the base instrument
Resolution: 0.1%
Accuracy: same as base instrument
Pulse
Modes: free-run, gated, triggered, delayed
Period range: 300 ns to 400 ms
Width range: 25 ns to 400 ms
Resolution: 25 ns
Accuracy: 5 ns
Video delay
Internal sync pulse: 0 to 400 ms
Externally supplied sync pulse: 225 ns to 400 ms
Modulation meter
Accuracy (rates ²100 kHz): 5% of range)
14. Deep mode offers reduced distortion for very deep AM. Waveform is DC-coupled and feedback-leveled at ALC levels above –13 dBm. At ALC levels below
–13 dBm, output is DC-controllable, but subject to sample-and-hold drift of 0.25 dB/second.
15. The 8360 has two unleveled modes, ALC Off and Search. In ALC Off mode, the modulator drive can be
controlled from the front panel to vary quiescent RF output level. In Search mode, the instrument microprocessor
momentarily closes the ALC loop to find the modulator drive setting necessary to make the quiescent RF output level equal to an entered value, then opens
the ALC loop while maintaining that modulator drive setting. Neither of these modes is feedback leveled.
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