EIP Microwave 28B Data Sheet

Phase Matrix, Inc.

25B

Instruments You Can Count On

High Performance
in a Small Package

28B

Phase Matrix, Inc.
EIP 25B and 28B
Frequency Counters

Page 1

• Count Carrier and IF Frequencies From 10Hz to 26.5 GHz

• Measure Frequency and Power Level With A Single Connection

• Analyze Individual Signals In A Multi-Channel Spectrum

• 200 Watts Peak Input Protection

• Ideal For Field Maintenance and Bench-Top Applications

• World Wide Proven Reliablity

Phase Matrix / EIP 25B and 28B. . . .

High Performance in a Small Package

The Ideal Communications Counters

The 25B and 28B CW frequency counters from Phase Matrix, Inc are the ideal
counters for communications applications. These portable, rugged units combine
durability and small size with high performance features typically found only in
larger, bench-top instruments.

The 25B measures CW, FM and AM frequencies from 10 Hz to 20 GHz, and the 28B
extends that range up to 26.5 GHz. With simultaneous power measurement
capability, and options for a high stability time base and a protective transit case,
these high performance counters are ideally suited for applications in:

• Carrier signal measurement

• Transmitter frequency verification

• Channel specific signal measurements

• Microwave link testing

• Channel monitoring

• ATE

The 25B and 28B are ideal for
frequency and power level testing of terrestrial
microwave systems.

Unsurpassed Burnout Protection

Typically found in high performance spectrum analyzers; only Phase Matrix
counters feature a YIG-preselected microwave input, which provides unparralled
burnout protection, FM tolerance and frequency selectivity. The YIG preselector
works like a tunable bandpass filter, preventing harmonics and other out-of-band
spurious signals from interfering with measurement of the desired signal. It also
protects the counter from accidental application of high level signals (up to 200
watts peak), reducing downtime and the associated high cost of repairing
damaged microwave circuitry.

Selective Frequency and Power Measurements

With a single connection, the 25B and 28B can simultaneously measure and
display the input signals frequency and power level in the microwave band,
eliminating the need for a seperate microwave power meter. Within the 25MHz
bandwidth of the YIG-preselector, only the selected signals frequency and power
level are measured. Signals to be analyzed are selected by keystroke entry of an
individual center frequency, or search a range between a low and high frquency
limit. This signal selectivity, combined with 20MHz of FM tolerance at all rates up to
10MHz, allows the 25B and the 28B to make accurate frequency and power level
measurements even while the input signal is carrying traffic; there is no need to
take the transmitter, or adjacent channels, off the air for routine checks.

Only Phase Matrix counters offer the unique
YIG-preselected heterodyne technique.

These useful counters are as capable
on the bench as in the field. Their high
performance matches or exceeds the
best performance available in larger, bench­top instruments.

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Phase Matrix / EIP 25B and 28B. . . .

Field Proven Reliability

Easy to Read and Operate

Frequency and Power measurements can be made to a resolution of 1Hz and 0.1 dB,
respectively. Easy keystroke entry of frequency and power offsets allows system­under-test frequency translation devices and cable losses to be compensated for in
the displayed measurement results.

Portable, Rugged Construction

The small size of the 25B and 28B, along with their convenient carrying handle and
protective front cover, makes these units perfect for portable field maintence applica­tions. Their rugged, durable construction will provide years of reliable operation under
the roughest conditions. The units even feature an optional fast warm-up ovenized
time base (Option 05) that delivers a reference frquency within 5x10-9 of the final value
within 10 minutes of power-up. This ensures the best possible accuracy with minimum
warm-up time delay.

Proven Reliability

The design of the 25B and 28B is based on the Phase Matrix / EIP 545B CW microwave
frequency counter. This counter has become the standard in reliability, achieving over
26,000 hours (12.5 years) of field-proven MTBF. The high performance, economy and
compact configuration of the 25B and 28B make them the ideal choice for your
communications applications in the field and on the bench.

POWER
(dBm)

+10

0

-5

-30

FREQUENCY

MEASURED SIGNAL

The frequency selective operation of the
counters allows measurement of any individual
signal’s frquency and power in a multi-signal
environment.

The Phase Matrix 25B/28B feature a convenient
built-in carrying handle and protective front
cover.

Page 3

SPECIFICATIONS

MODEL 25B and 28B

Frequency Range

Sensitivity

Impedance

Connector

Input Coupling

Maximum Operating Level

Damage Level

Acquisition Time

Standard
Center Frequency Mode

Automatic Amplitude
Discrimination

BAND 1 BAND 2

10 Hz-100 MHz
25mV rms

1MΩ/20pF
BNC (female)
DC
120 V rms*
150 V rms*

N/A
N/A

N/A

10 MHz-1 GHz

-20dBm

50 Ohms
BNC (female)
AC
+10 dBm
+27 dBm

<50mS
N/A

N/A

BAND 3

1-20 GHz (25B)
1-26.5 GHz (28B)

-30 dBm 1-12.4GHz

-25 dBm 12.4GHz-20GHz

-20 dBm 20GHz-26.5GHz
50 Ohms
Precision Type N-female (25B)

APC 3.5-female (28B)
AC

+10 dBm
+45 dBm (30 watts) continuous

+53 dBm (200 watts) peak pulsed
(<1uS PW, 0.1% duty)
<200ms
<20ms

10 dB

FM Tolerance

Maximum Tracking Speed

VSWR

Center Frequency Mode

Frequency Limits

Carrier remains in
band
Carrier remains in
band
N/A

N/A

N/A

Carrier remains in
band
>800MHz/sec
typical

2.5:1 typical
N/A

N/A

20 MHz P-P up to 10MHz rate
>800MHz/sec typical

2.5:1 typical
Keyboard controlled. Unit will mea-

sure signal within ± 5 MHz
of entered frequency. Signals of
equal amplitude must be seperated
by 40 MHz

Keyboard controlled. Unit will mea­sure largest signal within set limits.
Signals outside desired range must
be seperated by ≥200 MHz (typical)
from either limit.

*Above 1KHz, decreases @ 6dB/
octave down to 3.0 V rms

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SPECIFICATIONS

Power Measurement

Time Base: Standard TCXO

Frequency Range
Accuracy
Resolution

Minimum Level
Display
Offset Range
Offset Resolution
Offset Input
Measurement Time
Measurement Window

1-20 GHz (25B)
1-26.5 GHz (28B)

±1.2 dB typical (0˚ to 50˚C, input padded by 3 dB)
±0.5 dB typical (25˚C, input padded by 3 dB)

Power:±0.1 dB
Frequency: 100 kHz to 1 GHz (selectable) via GPIB

1 Hz to 1 GHz (selectable) via GPIB
Equal to counter sensitivity
Simultaneous frequency and power reading

-99.9 dB to +99.9 dB

0.1 dB
Keyboard or optional GPIB
1 Gate Time + 50ms + Freq Measurement Time
25 MHz nominal

Crystal Frequency
Stability

Output Frequency
External Time Base

GPIB (IEEE-488/1978) Programmabilty

GPIB

General

Warranty
Frequency Resolution
Display

Frequency Accuracy
Test
Sample Rate

Reset
Frequency Offset
Frequency Multiply

Computer Interface
Certifications

Operating Temperature
Power
Net Weight
Shipping Weight
Dimensions
Standard Accessories

10 MHz
Aging Rate
Short Term
Temperture
Line Variation
10 MHz square wave, 1V P-P min into 50Ω
Requires 10 MHz, 1VP-P min into 300Ω

Functions, special functions and diagnostics are
programmable. Address settable from the front
panel. Compatible IEEE STD-488. SH1, AH1, T5, L3,
SR1, RL1, DC1 and DT1 implimented.

1 year Standard (Extendable to 3 years)
Selectable 0.1 Hz to 10 MHz in band 1, 1 Hz to 1 GHz in bands 2 and 3.
12-digit LED sectionalized to read GHz, MHz, kHz, Hz or GHz, MHz,
kHz, dBm.
± 1 count ± time base error.
Front panel selected service diagnostics and user information.
Varies time between measurements, from 0 sec to 10 sec.
HOLD freezes display indefinitely.
Resets display to zero and initiates new acquisition.
Displayed frequency is offset by the entered value to 1 Hz resolution.
Displayed frequency is multiplied by an entered integer from 1 to 99 and
displayed to 1 kHz resolution. OFFSET is added or subtracted to obtain
y = mx ±b result.
GPIB (IEEE 488/1978)
CE Certified for EMI/RFI to EN50011 and EN50082-1
Certified for Safety to IEC 1010-1 (1990)
0˚ to 50˚C.
100/120/140/200/220/240/VAC ±10%, 50 to 400 Hz; 60 VA typical.
~ 20 lbs. (9.1 kg).
~ 26 lbs. (11.8 kg).

3.5” H x 8.125” W x 18.75” D (89 mm H x 206 mm W x 476 mm D).
Power cord, Operating manual, Protective front cover.

<1x10-7/month, <1x10-6/year
<1x10-9 rms for one sec. averaging time
<1x10-6, 0˚ to 50˚C
<1x10-7, ±10% line voltage

Page 5

SPECIFICATIONS

OPTION 05
Stability

High Stability Ovenized Timebase

Aging Rate
Short Term
Temperture
Line Variation
Retrace
Time base option utilizes a proportional control oven which is energized
whenever the line cord is connected to an AC source, and operates even
when the unit is switched off.

ORDERING INFORMATION

MODEL 25B
MODEL 28B

Options

10 Hz - 20 GHz Microwave Frequency Counter
10 Hz - 26.5 GHz Microwave Frequency Counter

05
14
15

Accessories

011
016
018
021
031
032
042

-10

<5x10
<1x10

/day, (After 24 hour warm up).

-10

rms for one sec. averaging time

<3x10-8, 0˚ to 50˚C

-10

<2x10

, ±10% line voltage

<5x10-9 of final value 10 minutes after counter is turned on at 25˚C

High Stability Ovenized Time Base
2 Year Warranty Extension (3 years total)
MIL-STD 45662 (ANSI Z540-1:94)

Rack Mount Kit without Handles
Chassis Slide Kit for 1 Unit
Front Panel Handle Kit
Suitcase Style Transit Case
Extra Operating Manual (one supplied at no cost)
Maintenance and Service Manual (includes operation information)
Service Kit

For More Information Contact:

Phase Matrix, Inc.
109 Bonaventura Dr.
San Jose, CA. 95134 USA
tel: [phone]
fax: [phone]
toll free: 877-4PhaseM
www.phasematrix.com

Specifications and ordering
information subject to change without notice.

Copyright ©1999 Phase Matrix, Inc. All Rights Reserved
Printed in the USA
Revision 10/99

Datasheet Prepared By:
Sonic Imagery Labs and

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