25B/28B Half-Rack Frequency Counter

25B & 28B

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This product is no longer orderable.

25B/28B Frequency Counters

The 25B and 28B CW frequency counters are ideal for communications applications. These portable, rugged, all-die-cast-body units combine durability and small size with high-performance features typically found in larger, benchtop instruments. The 25B measures CW, FM, AM as well as complex modulated frequencies from 10 to 20 GHz, and the 28B extends the range up to 26.5 GHz.

Features

• Carrier Signal Measurement
• Transmitter Frequency / Power Verification
• Channel-Specific Signal Measurements
• Microwave Link Alignment and Testing
• ATE Measurements

Accessories

End of Life Notice:
This product is no longer orderable.

25B/28B Accessories

Part Number	Description	Documentation	Image
M25B-ACC011 M28B-ACC011	Rack mount kit for 1 unit w/o handles	Datasheet
M25B-ACC012 M28B-ACC012	Rack mount kit for 2 side-by-side units (Agilent compatible)	Datasheet
M25B-ACC016 M28B-ACC016	Chassis slide and rack mount kit for 1 unit	Datasheet
M25B-ACC018 M28B-ACC018	Front panel handle kit (not compatible w/accessories 011, 012, 015, or 017)	None
M25B-ACC021 M28B-ACC021	Trunk-style transit case	None
M25B-ACC051 M28B-ACC051	Canvass case	None
M25B-ACC031 M28B-ACC031	Operation manual	None
M25B-ACC032 M28B-ACC032	Service manual	None
M25B-ACC042 M28B-ACC042	Service kit	None

Documentation

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This product is no longer orderable.

Documentation

Datasheet

Operation Manual QuickSyn Data Sheet

About Memory Clearing QuickSyn Data Sheet

Ordering Information

End of Life Notice:
This product is no longer orderable.

Ordering Information

Models	25B	10 Hz to 20 GHz frequency counter
	28B	10 Hz to 26.5 GHz frequency counter
Options	05	High-stability ovenized time base
	14	Two-year warranty extension (for total of three years)
	15	ANSI/NCSL Z540 Standard data & certificate
Accessories	M25B-ACC011 M28B-ACC011	Kit, rack-mount, without handles
	M25B-ACC012 M28B-ACC012	Kit, rack-mount for 2 side-by-side units (Agilent compatible)
	M25B-ACC016 M28B-ACC016	Kit, chassis slide rack-mount for 1 unit
	M25B-ACC018 M28B-ACC018	Kit, front-panel handle (not compatible w/accessories 011, 012, 015, or 017)
	M25B-ACC021 M28B-ACC021	Case, trunk-style
	M25B-ACC051 M28B-ACC051	Case, canvas-style
	M25B-ACC031 M28B-ACC031	Manual, operation (extra hardcopy in addition to the one that ships with a new unit)
	M25B-ACC032 M28B-ACC032	Manual, service (hardcopy)
	M25B-ACC042 M28B-ACC042	Kit, service

Servicing Information►

Servicing Information

When requiring service for your PMI product through NI, please reference your serial number and the applicable module part number:

NI Module Part Number	Description
134414A-01	MOD ASSY, PMI, MODEL 25B
134415A-01	MOD ASSY, PMI, MODEL 28B

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Product Warranty

Phase Matrix warrants its products to be free from defects in material and workmanship for one year from the date of delivery. Damage due to accident, abuse, or improper signal level is not covered by the warranty. Removal, defacement, or alteration of any serial number, inspection label, marking or seal may void the warranty. Phase Matrix will repair or replace, at its option, any components of this product that prove to be defective during the warranty period provided that the entire unit is returned freight prepaid to Phase Matrix, Inc. or an authorized service facility. In-warranty units will be returned freight prepaid; out-of-warranty units will be returned freight COLLECT. No warranty other than the above is expressed or implied.