11730D AGILENT TECHNOLOGIES, 11730D Datasheet - Page 66

• Manufacturer Part Number: 11730D
• Description: SENSOR CABLE, 50FT
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 11730D

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Cable Length: 50ft
• Features: Reduces RFI Effect On Low Power Readings With Improved Shielding Design
• Cable Assembly Type: Sensor
• Cable Color: Gray
• Rohs Compliant: No
• For Use With: 8480 & E-Series Power Sensors
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Square law performance
When detectors are used in reflectometer
and insertion loss setups, the measurement
uncertainty depends on the output voltage
being proportional to input power. The
term square law comes from the output
voltage being proportional to the input
power (input voltage squared). Most
microwave detectors are inherently square
law from the P tss level up to about
–15 dBm. Figure 7 shows this
characteristic.
Figure 8 shows detector output in dB
relative to P in = –20 dBm. As P in exceeds
–20 dBm, the detector response deviates
from square law. The user can select a
load resistor that will extend the upper limit
of the square law range beyond ±15 dBm.
By choosing the square law load option,
the deviation from ideal square law
response will be ±0.5 dB (although the
sensitivity specification is decreased by a
factor of 4).
Figure 7. Typical detector square law response (mV).
Figure 8. Typical detector square law response (dB).
10000
1000
–12
–15
0.01
100
–3
–6
–9
0.1
10
3
0
1
–40
–40
R
L
R
: 50 kΩ & 10 MΩ
–30
L
2 kΩ
500 Ω
50 Ω
–30
: 50 kΩ & 10 MΩ
2 kΩ
500 Ω
50 Ω
Input power @18 GHz (dBm)
Input power @18 GHz (dBm)
–20
–20
–10
–10
PDB diode
0
0
www.agilent.com/find/mta
PDB diode
10
10
20
20
Detectors (continued)
Detectors
55
8