Atec Agilent-E8257D - Manual (Page 14)

14
Depth Linear mode Exponential (log) mode
(downward modulation only)
Maximum:
ALC On: > 90% > 20 dB
ALC Off with Power Search 2
or ALC On with Deep AM 3 : > 95 % > 40 dB
Settable: 0 to 100 % 0 to 40 dB
(0 to 100 %/volt sensitivity) (0 to 40 dB/volt sensitivity)
Resolution: 0.1% 0.01 dB
Accuracy (ALC On, 1kHz rate): < ±(6% of setting + 1%)
< ± (2% of setting +0.2dB)
Ext sensitivity ± 1 V
peak
for indicated depth –1 V for indicated depth
Rates (3 dB bandwidth, 30% depth)
DC Coupled
0 to 100 kHz
AC coupled 10 Hz to 100 kHz (useable to 1 MHz)
Distortion (1 kHz rate, ALC On, linear mode, Total Harmonic Distortion)
30% AM
< 1.5%
60% AM < 2%
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.
Amplitude modulation 1
(part of Option UNT)
(typical)
1. AM specifications are typical. For carrier frequencies below 2 MHz or above 50 GHz, AM is useable but not specified. Unless
otherwise stated, specifications apply with ALC on and envelope peaks within ALC operating range (–20 dBm to maximum
specified power, excluding step-attenuator setting).
2. ALC Off is used for narrow pulse modulation and/or high AM depths, with envelope peaks below ALC operating range.
Carrier power level will be accurate after a Power Search is executed.
3. ALC On with Deep AM provides high AM depths together with closed-loop internal leveling. This mode can be used with a
repetitive AM waveform (frequency > 10 Hz) with peaks > –5 dBm (nominal, excluding step-attenuator setting).