Atec Agilent-E8247C_57C - Manual (Page 10)

10
1. 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.
2. For AM depth settings > 90% or > 20 dB, deep AM mode or 1 kHz ALC BW is recommended.
3. Internal2 is not available when using swept sine or dual sine modes.
Depth Linear mode Exponential (log) mode
(Downward modulation only)
Maximum > 90% > 20 dB
Settable 2 0 to 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 V
peak
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 %
Paths 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.
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)
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.
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
3
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
LF out
Output
Internal1 or internal2. Also provides monitoring of
internal1 or internal2 when used for AM, FM, or FM.
Amplitude 0 to 3 V
peak
, (nominal) into 50 Ω
Output impedance 50 Ω (nominal)
Swept sine mode:
(frequency, phase continuous)
Operating modes
Triggered or continuous sweeps
Frequency range 1 Hz to 1 MHz
Sweep rate 0.5 Hz to 100 kHz sweeps/s, equivalent to sweep
times 10 us to 2 s
Resolution 0.5 Hz (0.5 sweep/s)
Amplitude modulation
(f
c
> 2 MHz) 1 (typical)
(E8257C only)
External modulation inputs
(Ext1 & Ext2)
(E8257C only)
Simultaneous modulation
(E8257C only)
Internal modulation source
(E8257C only)