Atec Anritsu-68369ANV - Manual (Page 14)

12
Amplitude Modulation
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.
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
External AM Input: Log AM or Linear AM input, front or rear-panel
BNC, 50 Ω or 600 Ω input impedance. All options selectable from
modulation menu.
AM 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
Frequency Modulation
Maximum FM Deviation:
Locked Mode (1 kHz to 500 kHz rates): The lesser of ±10 MHz
or rate x 300
Unlocked Narrow Mode (DC to 500 kHz rates) : ± 10 MHz
Unlocked Wide Mode DC to 100 Hz rates: ± 100 MHz
FM Bandwidth (3 dB):
Locked Mode : 1 kHz to 500 kHz
Unlocked Narrow Mode: DC to 500 kHz
Unlocked Wide Mode : DC to 100 Hz
Flatness locked mode (10 kHz to 500 kHz rates: ±1 dB
Accuracy (100 kHz rate, ± 1 V input) : 10% (5% typical)
External FM Input: Front or rear panel BNC, 50 Ω or 600 Ω input
impedance. All options selectable from modulation menu.
FM Sensitivity: Continuously variable from ±10 kHz per volt to
±20 MHz per volt (Locked and Unlocked Narrow FM modes),
or ±100 kHz per volt to ±100 MHz per volt (Unlocked Wide FM
mode), selectable from modulation menu.
Maximum Input: ± 1V
Square Wave Modulation
The RF output can be pulse modulated via an external
modulating signal or an internal square wave generator.
On/Off Ratio: >50 dB
Rise/Fall Time: < 1 µs typical
Internal Square Wave Generator: Four square wave signals
(400 Hz, 1 kHz, 7.8125 kHz, and 27.8 kHz), selectable from
modulation menu.
Accuracy: Same as internal or external 10 MHz time base.
Square Wave Symmetry: 50% ± 5%
External Input: Front or rear-panel BNC, selectable from
modulation menu.
Drive Level: TTL compatible input
Minimum Pulse Width:
>5 µs
Input Logic: Positive-true or negative-true, selectable from
modulation menu.
681XXC/691XXB MODULATION