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Page 2
Model 423A/8470A
1. GENERAL INFORMATION
2. This manual contains operating instructions for
the Hewlett-Packard Model 423A and 8470A Crys¬
tal Detectors. Included in the manual is the inform¬
ation required to install and test the crystal
detectors.
3. On the rear cover of this manual, below the
manual part number, is a "Microfiche", part num¬
ber. This number may be used to order a 4 x 6-
inch microfilm transparency of the manual.
4. Specifications
5. Instrument specifications are listed in Table 1.
These specifications are the performance standards,
or limits against which the instrument may be tested.
6. Description
7. The Hewlett-Packard Model 423A and 8470A
Crystal Detectors are 5012 (nominal) devices de¬
signed for measurement use in coaxial systems. The
instruments convert RF power levels applied to the
50ft input connector into proportional values of
dc voltage. The instruments measure relative power
up to 100 mW and have a BNC female connector
for the output jack which allows the detected out¬
put to be connected to a SWR meter. The output
voltage polarity is negative, unless Option 003 is
selected. The frequency range of the 423A is
10 MHz to 12.4 GHz. The 8470A's frequency range
extends from 10 MHz to 18 GHz.
8. Options
9. The 423A and 8470A Crystal Detectors are
available with the following options (see Table 1
for further descriptions):
Option 001:
Matched pair of detectors
Option 002:
Furnished with matched load re¬
sistor (HP 11523A) for optimum
square law characteristics
Option 003:
Positive polarity output
Option 012:
Furnished with stainless steel
type N male connectors (8470A
only).
Option 013:
Furnished with stainless steel
type N female connectors (8470A
only).
10. INSTALLATION
11. Initial Inspection
12. Inspect the shipping container for damage. If
the shipping container or cushioning material is
damaged, it should be kept until the contents of the
shipment have been checked for completeness and
the instrument has been checked mechanically and
electrically.
13. The procedures for checking electrical perfor¬
mance are given under PERFORMANCE TESTS. If
the contents are incomplete, if there is mechanical
damage or defect, or if the instrument does not pass
the electrical performance test, notify the nearest
Hewlett-Packard office. If the shipping container is
damaged, or the cushioning material shows signs of
stress, notify the carrier as well as the Hewlett-
Packard office. Keep the shipping materials for the
carrier's inspection. The HP office will arrange for
repair or replacement at HP's option without wait¬
ing for claim settlement.
14. Mating Connectors
15. The 8470A (standard) RF input connector
must be an APC-7 type connector. The mating
RF input connectors used with the 423A and
8470A Option 012 must be Type N female connec¬
tors which comply with U.S. military standard
MIL-C-39012. The mating RF input connector
used with the 8470A Option 013 must be Type N
male connector which complies with MIL-C-39012.
16. Operating Environment
17. The operating environment of the crystal de¬
tectors should be within the following limitations:
a.
Temperature: 0° to +55°C
b.
Altitude: < 4572 metres (15,000 feet)
c.
Humidity: <95% relative.
18. STORAGE AND SHIPMENT
19.
Environment. The instrument should be stored
in a clean, dry environment. The following environ¬
mental limitations apply to both storage and
shipment:
a.
Temperature: — 20°C to+55°C
b.
Altitude: <7620 metres (25,000 feet)
c.
Humidity: <95% relative.
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