Atec Agilent-E8251A - Manual (Page 8)

8
Amplitude modulation (f
c
> 2 MHz) 13 (typical)
Exponential (log) mode
Depth Linear mode (Downward modulation only)
Maximum > 90% > 20 dB
Settable 14 0 - 100 % 0 to 40 dB
Resolution 0.1% 0.01 dB
Accuracy < ±(6 % of setting + 1 %) < ±(2% of setting + 0.2 dB)
(1 kHz rate)
Ext sensitivity ±1 Vpeak for –1 V for indicated depth
indicated depth
Rates (3 dB bandwidth, 30% depth) dc/10 Hz to 100 kHz typical (useable to 1 MHz)
Distortion (1 kHz rate, linear mode, THD)
30% AM < 1.5%
90% AM < 4 %
Path AM1 and AM2 are summed internally for
composite modulation. Either path may be switched
to any one of the modulation sources: Ext1, Ext2,
internal1, internal2.
External modulation inputs (Ext1 & Ext2)
Modulation types AM, FM, and FM
Input impedance 50 or 600 Ω, nominal, switched
High/low indicator
(100 Hz to 10 MHz BW, ac coupled inputs only) Activated when input level error exceeds
3%, nominal
Simultaneous modulation All modulation types may be simultaneously
enabled except: FM with FM, and linear AM with
exponential AM. AM, FM, and FM can sum
simultaneous inputs from any two sources (Ext1,
Ext2, internal1, or internal2) Any given source
(Ext1, Ext2, internal1, or internal2) may be routed
to only one activated modulation type.
Internal modulation source Dual function generators provides two independent
signals (internal1 and internal2) for use with
AM, FM, FM, or LF Out.
Waveforms Sine, square, positive ramp, negative ramp, triangle,
Gaussian noise, uniform noise, swept sine,
dual sine
15
Rate range
Sine 0.5 Hz to 1 MHz
Square, ramp, triangle 0.5 Hz to 100 kHz
Resolution 0.5 Hz
Accuracy Same as timebase
13 For f c < 2 MHz AM is usable but not specified.
AM specifications apply with ALC on, and envelope
peaks < maximum specified power. For instruments
without Option 1E1 attenuator, specs apply for
carrier amplitude > –2 dBm.
14 For AM depth settings > 90% or > 20 dB, deep AM
mode or 1 kHz ALC BW is recommended.
15 Internal2 is not available when using swept sine or
dual sine modes.
A Series only