Model 432A Section I
1-1
SECTION I
GENERAL INFORMATION
1-1. DESCRIPTION.
1–2. The Hewlett-Packard Model 432A Power Meter,
with HP temperature-compensated thermistor mounts,
measures RF power from 10 microwatts (-20 dBm) to 10
milliwatts (+10 dBm) full scale with 1% of full scale
accuracy from 10 MHz to 40 GHz. With a selector switch,
the instrument normalizes the power meter reading to
compensate for the Callibration Factor of a thermistor
mount used for a given measurement. For portable
operation, Option 01 instruments have a rechargeable
nickel-cadmium battery. See Table 1–1 for complete
specifications.
1–3. The Model 432A has provision for dc substitution
measurements and for power meter calibration. An output is
provided for recorders or digital voltmeter readout.
1–4.
Accessories. Two accessories are supplied with the Model
432A Power Meter: a 7.5-foot (2290 mm) detachable power cable
and a 5-foot (1520 mm) cable that connects the thermistor mount
to the meter. Thermistor mounts are available but not supplied with
the Power Meter (refer to Table 1–2). Table 1–1 lists those
accessories supplied and also those available.
1-5. INSTRUMENT IDENTIFICATION.
1–6. Hewlett-Packard instruments are identified by an 8- or 10-
digit serial number. The first four digits are the Serial Prefix. To
properly match a manual with the instrument to which it applies,
the prefix on the instrument must be the same as the prefix at the
front of the manual. If the numbers are different, information is
supplied either on yellow Manual Change Supplements, or in an
Appendix in the Manual. If the change information is missing,
contact your HP Sales Office (Sales Offices are listed at the back
of the Manual).
SER. 1234A98765
COMPANYHEWLETT - PACKARD
MADE IN U.S.A.
SERIAL PREFIX
Figure 1-2. Instrument Identification
Table 1-1. Specifications
Instrument Type: Automatic, self-balancing power meter
for use with temperature-compensated thermistor
mount.
Power Range: 7 ranges with full-scale readings of 10, 30,
100, and 300 µW, 1, 3 and 10 mW; also calibrated in
dBm from -20 dBm to +10 dBm full scale in 5-dB steps.
Accuracy: ±1% of full scale on all ranges (+0˚C to +55˚C).
Calibration Factor Control: 13-position switch
normalizes meter reading to account for thermistor
mount Calibration Factor.
Range: 100% to 88% in 1% steps.
Thermistor Mount: External temperature-compensated
thermistor mounts required for operation (see Table
1-2).
Meter: Taut-band suspension, individually computer-
calibrated, mirror-backed scales. Milliwatt scale more
than 4-1/4 inches (108 mm) long.
Zero Carryover: Less than ±0.5% of full scale when
zeroed on most sensitive range.
Fine Zero: Automatic, operated by toggle switch.
Recorder Output: 1.000 volt into open circuit
corresponds to full-scale meter deflection (1.0 on 0 - 1
scale) ±0.5%; 1000-ohm output impedance, BNC
connector.
RFI: Meets all conditions specified in MIL-I-6161D.
Power: 115 or 230 Vac ±10%, 48 to 440 Hz,
13 VA (max). Optional rechargeable
battery provides up to 20 hours
continuous operation. Automatic battery
recharge.
Weight: Net 6-1/2 lb (3 kg).
Weight with Optional Battery Pack: Net 9-1/4 lb (4.2 kg).
Environmental:
Operating Temperature: 0 to +55˚C.
Storage Temperature: -20 to +60˚C.
Humidity: Up to 95% Relative Humidity at 40˚C.
EMC: Meets EN55011:1991 (Group 1, Class A), and
EN50082-1.
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