Operation - HP 84811A Operating And Service Manual

Page 4
HP 84811A
Storage and Shipment (cont'd)
Original Packaging. Containers and materials
identical to those used in factory packaging are
available through Hewlett-Packard offices. If the
instrument is being returned to Hewlett-Packard
for servicing, attach a blue tag (found at the end of
this manual) indicating the type of service re¬
quired, return address, model number, and serial
number. Also, mark the container FRAGILE to
assure careful handling. In any correspondence,
refer to the instrument by model number and
serial number.
OPERATION
WARNING
BEFORE CONNECTING THE PEAK
PO WER SENSOR TO OTHER INSTR U-
MENTS, ensure that all instruments are
connected to the protective (earth)
ground. Any interruption of the protec¬
tive earth grounding will cause a poten¬
tial skock hazard that could result in
personal injury.
Correction Factor
Before- taking a measurement, find the correction
factor on the label attached to the Peak Sensor cover.
Find the correction factor that is associated with the
frequency of the measurement. The correction factor
for 2 GHz applies to frequencies from 100 MHz to 2
GHz. Enter the data into your HP 8900C or 8900D
peak power meter.
NOTE
Correction Factor data and Calibration
Factor data are not the same. Correction
Factor data must be set on the power
meter before the measurement. That is,
the measured value cannot be corrected
mathematically afterwards based on
this data.
Operating Instructions
Once the Peak Power Sensor has been attached to
the power meter and the Correction Factor has
been set, the power meter is ready to take a read¬
ing. For more information on operating the power
meter, refer to the operating instructions in the
power meter operating and service manual.
RETURN LOSS PERFORMANCE TEST
Specification
SWR: 100 MHz to 12 GHz <1.5
12 GHz to 18 GHz <2,0
Description
To verify SWR specifications a Return Loss Test is performed. The Return Loss Test
may berun without the Peak Power Sensor being connected to the Peak Power Meter. A
microwave source is connected by appropriate attenuation to a dual directional
coupler. The Peak Power Sensor is connected to the test port of the directional coupler.
The incident and reflected ports of the directional coupler are connected to power
meters. From the power measurements made on the incident and reflected ports,
Return Loss can be calculated.
Equipment Sweep Oscilator Mainframe... HP8620C
RF Plug-in. HP 86290A
Microwave Amplifier . HP 489A, 491C, 493A, 495A
Coaxial Step Attenuator (1 dB/step).HP 8494B
Dual Directional Coupler. HP 11692D
Power Meter (2 required) . HP436A
Power Sensor (2 required) . HP 8481A
Coaxial Attenuator (10 dB) ..HP 8491B Opt. 010
Type N Coaxial Short. HP 11512A
Type N Coaxial Open
(made from the following parts): .. HP 1250-0916 Body,
HP 1250-0016 Snap Ring,
HP 1250-0918 Nut