11730D AGILENT TECHNOLOGIES, 11730D Datasheet - Page 87

• 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

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Frequency Meter
Frequency Meter
Overview
Passive frequency meters are intended for moderate (+0.05%)
accuracy applications in microwave measurement setups. Reaction
cavity types are usually best for this purpose since they permit
full power flow down the transmission line except at the precise
tuned frequency. At the tuned frequency, a slight amount of power
(1.5 dB dip) is absorbed by the cavity which is visible on an
oscilloscope or SWR meter display.
Key specifications
• SWR
• Insertion loss
• Accuracy
• Turning dip
• Spurious response
Low SWR and insertion loss are important to provide flat power
transmission off-frequency. The Agilent frequency meter features
broadband coupling loops that are very flat versus frequency.
Accurate calibration is maintained by attention to thermal
considerations and metal selection in design. Long effective
scales are provided with a highly-readable spiral dial.
A constant tuning dip ensures readable indications at all
frequencies in the band. The Agilent frequency meter is carefully
designed and tested for uniformity of tuning dip. Likewise, spurious
responses are undesirable since two responses near the same
input frequency cause confusion. Although this meter covers
more than 1 octave, the design uses a loaded coaxial cavity that
prevents resonance at 3/4 λ tuned frequencies providing
low-error operation.
Specifications
Model
537A
Frequency
range
3.7 to 12.4 GHz
Reflection
coefficient
off resonance
0.33 (2.0 SWR,
9.5 dB return loss)
Dial
accuracy
0.100%
Overall
accuracy
0.170%
Agilent 537A frequency meter
This direct-reading frequency meter measures frequencies from
3.7 to 12.4 GHz quickly and accurately. Its long scale length and
numerous calibration marks provide high resolution. This is
particularly useful when measuring frequency differences or
small frequency changes. Frequency is read directly in GHz so
interpolation or charts are not required.
The instrument comprises a special transmission section with a
high-Q resonant cavity tuned by a choke plunger. A 1-dB or
greater dip in output indicates resonance; virtually full power is
transmitted off resonance. Tuning is by a precision lead screw,
spring-loaded to eliminate backlash.
Resolution is enhanced by a long, spiral-scale calibrated in small
frequency increments. Resettability is extremely good, and all
frequency calibrations are visible so that the measurement point is
directly indicated. Overall accuracy of the frequency meter
includes allowance for 0 to 100 percent relative humidity and
temperature variation from 13 to 33°C. There are no spurious
modes or resonances.
Agilent 537A
Minimum
dip at
resonance
1 dB
Calibration
increment
10 MHz
Connector
Type-N (f)
Dimensions
mm (in)
118 x 146 x 89
(4.6 x 5.8 x 3.5) (5)
Shipping
weight
kg (lb)
2.3