Specifications
20
Specifications
See definition of specifications and supplemental characteristics on page 16.
Sweep
Sweep time
Continuous
Sequential sweeps initiated by the trigger: 20 msec full span
to 1500 sec full span in 1,1.5,2,3,5,7.5,10 sequence.
Accuracy: Sweep time ≤ 100 sec, ±10%; >100 sec, ±20%.
Zero frequency span
Accuracy: same as continuous.
Marker (sweeps ≥ 20 msec only)
Normal: Displays time from beginning of sweep to
marker position.
Accuracy: Sweep time settings ≥ 20 msec but ≤ 100 sec,
±10% x (indicated time/sweep time setting);
settings > 100 sec, ±20% x (indicated time/sweep
time setting).
∆
: Displays time difference between stationary and
tunable marker.
Accuracy: same as normal.
Inputs
RF inputs
The standard instrument configuration is as follows:
Input #1
100 Hz to 1500 MHz, 50 Ω, BNC connector (fused); dc coupled.
Reflection coefficient: Typically < 0.20 (1.5 SWR) to 500 MHz,
< 0.33 (2.0 SWR) 500 MHz to 1500 MHz; ≥ 10 dB input
attenuation.
Fuse blow time: < 0.1 sec for input > 35 dBm (250 mA).
Input #2
100 kHz to 1500 MHz, 50 Ω, Type N connector; ac coupled.
Reflection coefficient: Typically < 0.20 (1.5 SWR);
> 10dB input attenuation.
LO emission (typical)
Typically < –75 dBm (0 dB RF ATTEN).
Isolation (typical)
> 90 dB between inputs.
Also available: Input #1, 100 Hz to 1500 MHz, 75 Ω.
BNC connector, dc coupled (Option 001).
Maximum input level
AC
Continuous power, +30 dBm (1 watt); 100 watts, 10 µsec
pulse into > .50 dB attenuation.
DC
Input #1, 0 volts; input #2, ±50 volts
To establish a particular spurious-free dynamic range (in the
coupled attenuator mode), the input mixer drive level is
specified using SHIFT, (comma) and the desired level is
entered through the keyboard.
Residual responses (no signal at input)
< –105 dBm for frequencies > 500 Hz with 0 dB input
attenuation.
Gain compression
< 0.5 dB for signal levels < –10 dBm at the input mixer.
Average noise level (sensitivity)
Displayed < –135 dBm for frequencies > 1 MHz, < –112 dBm
for frequencies ≤ 1 MHz but > 500 Hz with 10 Hz resolution
bandwidth (0 dB input attenuation, 1 Hz video filter).
Refer to Figure 4 for typical noise levels.
When SHIFT M is used with the marker the displayed noise
level is adjusted to reflect the RMS noise level/1 Hz BW
which is typically < –142 dBm/1 Hz and < –119 dB/1 Hz
respectively for frequencies > 1 MHz and ≤ 1 MHz but > 500 Hz.
Figure 4. Typical sensitivity vs. input frequency
Marker
Normal
Displays the amplitude at the vertical position of the
tunable marker.
Accuracy: Equals the sum of the calibrator uncertainty,
reference level uncertainty, and scale fidelity between the
reference level and marker position.
∆
Displays the amplitude difference between the stationary and
tunable markers. Reference frequency need not be displayed
Accuracy: Equals the sum of scale fidelity and frequency
response uncertainty between the two markers.