Marconi 6970 User Manual

Power Meters

6970 RF Power Meter

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• Hand-held for portability

• Battery powered for field use

• Wide frequency range:
30 kHz to 46 GHz

• Analog bargraph

• Excellent accuracy traceable to National
Standards

• Power levels from -70 dBm
(100 pW) to +44 dBm (25 W)

• Internal power reference

• Audible Pass/Fail limits alarm

• Rugged case

• Four digit display

The 6970 RF Power Meter provides precision
microwave power measurements in a hand
portable battery-powered package. A wide
range of user features, including duty cycle, rel­ative power measurements and limit checking
make the 6970 Power Meter highly versatile.
The same wide range of power sensors used
with the IFR 6960 Power Meters and the 6200B
series Microwave Test Set are used by the 6970.

Field and Bench Use

The 6970 is designed for both field and bench use. For the installa­tion and maintenance engineer the instrument replaces large and
expensive meters with no loss of measurement performance.
Rechargeable batteries mean that there is no need for an AC supply;
this greatly eases measurements at remote sites such as an antenna
tower.

Additional benefits of the 6970 are lower cost and portability. An
optional soft carrying pouch with both belt loop and shoulder strap
enable the 6970 to be easily carried in field environments

For bench operation the instrument takes up little bench space and
it can be powered from the AC adapter.

Battery operation is ideal for field operation

High Accuracy

The 6900 series power sensors all have an excellent return loss spec­ification to minimise mismatch errors in power measurements.
Correction for power sensor frequency response and high power
non-linearity is also provided by entry of calibration factor and lin­earity factor values into the 6970.

For the very latest specifications visit www.aeroflex.com

All the power sensors are individually calibrated and supplied with a
calibration data chart.

The auto ZERO function reduces offset errors on each of the 6970
ranges. This increases measurement accuracy at low power levels
and improves the measurement sensitivity.

Built-In Power Reference

The built-in power reference provides an accurate 0 dBm (1 mW) 50
MHz calibration signal. Power sensors can be calibrated against this
reference for improved measurement accuracy and traceability.

The power reference is automatically switched on during a CAL pro­cedure or it can be enabled at any time to provide a traceable 0 dBm
signal for verification.

Operation

The instrument front panel consists of a keyboard and a four digit
LCD with annunciators. Power levels are clearly displayed on a digi­tal readout with an analog bargraph to facilitate peaking and nulling.
Power levels may either be displayed in logarithmic units such as dBm
or dBV or in Watts.

To save battery life, the unit powers down six minutes after the last
key press. 6970 will operate for 7 hours from a full battery charge.
When the instrument powers down the last operator set-up is stored
and this will be the state the 6970 assumes when it is next switched
on.

Upper and lower power limits can be set. An audio and visual alarm
alerts the user of a measurement that is out of limits. This is useful
to set a power to a pre-determined level as well as for monitor-ing
purposes.

The 6970 is fully auto-ranging but manual range hold is also possible.
Manual range selection is used when measuring modulated or unsta­ble signals. The display indicates either AUTO or MAN as appropri­ate and will also provide information of over/under-range conditions.

Wide Range of Power Sensors

The 6970 uses the same rugged IFR power sensors that have been
developed for the 6960 Power Meter and 6200B series Microwave Test
Set. A wide range of 17 sensors is available covering the frequencies
from 30 kHz to 46 GHz. Power level measured depends on sensor
type, sensors cover from -70 dBm (0.1 nW) to +44 dBm (25 W).

To cater for the different frequency ranges connector types include N
type, PC 3.5 mm, 2.92 mm and N type (75 W).

SSPPEECCIIFFIICCAATTIIOONN

Frequency Range

30 kHz to 46 GHz
Depending on sensor used

Power Range

-70 dBm (0.1 nW) to +44 dBm (25 W)
Depending on sensor used

Power Sensors Supported

6910 series (-30 dBm to +20 dBm)
6920 series (-70 dBm to -20 dBm)
6930 series (-15 dBm to +35 dBm)
6930 series opt 2 (-5 dBm to +44 dBm)

Instrumentation Accuracy Including Carryover

±1% range 0, 1, 2
±5% range 3

Power Accuracy

After calibration using 0 dBm, 50 MHz power reference: ±0.2 dB
Measuring a 50 MHz signal in the centre of the power sensor dynamic
range, from a source with a return loss better than 14 dB

DISPLAY

Resolution

4 digits for positive readings
3 digits for negative readings

Units

dBm, nW, mW, mW, W, mV, V, dBV

Annunciators

Analog bargraph, Battery low indicator, Indication of auto-ranging or
manual range, Upper and lower limits

CORRECTION

Linearity Factor

Ability to enter in range 0.01 to 15 with 0.01 resolution
Defaults to standard setting

Calibration Factor

Ability to enter in range 0.01% to 200%
Resolution: 0.01 to 99.99%

0.1 100% and above

Auto-Calibration

Ability to calibrate against a 0 dBm (1 mW),
50 MHz power reference

Auto-Zero

Removes DC offset from gain stages and power sensor

Set

<400 nW (6910 series)
<100 pW (6920)
<200 pW (6923/6924)
<12 mW (6930 series)

Drift

When measured over one hour at constant temperature
±10 nW (6910 series)
±100 pW (6920 series)
±300 nW (6930 series)

NOISE

Averaged over 5 s

±100 nW (6910 series)
±100 pW (6920 series)
±3 mW (6930 series)

FACILITIES

Averaging

Selected automatically
Audio limit

Produces audible tones when the measured power is above or below
programmed limits

Batteries

3 rechargeable NiCd AA size
Operating time
>7 hours from full charge when new

Operating Time

>7 hours from full charge when new

Time to Recharge

<14 hour

Power Consumption

250 mW

DC Input Requirement

9 V to 21 V, 120 mA via a 2.1 mm power connector

GENERAL

Operating Temperature Range

0 to +55°C

Storage Temperature Range

-40 to +55°C

Storage Humidity Range

Up to 85% RH at +40°C

Storage Altitude Range

Up to 4600 m (15000 ft)

DIMENSIONS AND WEIGHT

Height Width Depth Weight
50 mm 88 mm 190 mm 550 g

1.9 in 3.5 in 7.5 in

ELECTROMAGNETIC COMPATIBILITY

Conforms with the protection requirements of the EEC Council Directive
89/336/EEC. Conforms with the limits specified in the following stan­dards:
IEC/EN61326-1 : 1997, RF Emission Class B, Immunity Table 1,
Performance Criteria B

SAFETY

Conforms with the requirements of EEC Council Directive 73/23/EEC
(as amended) and the product safety standard IEC / EN 61010-1 :
2001 + C1 : 2002 + C2 : 2003 for class 3 portable equipment, for
use in a Pollution Degree 2 environment. The instrument is designed to
be operated from an Installation Category 1 supply.

POWER REFERENCE

Frequency

50 MHz ±0.05 MHz

Power level

0 dBm (1 mW)

Uncertainty

±0.7% traceable to National Standards

Accuracy

±1.2% worst case for one year

Output Connector

N (female), 50
mm power sensors.

Ω

. Adapters are supplied with 75 Ω, 3.5 mm and 2.92

For the very latest specifications visit www.aeroflex.com

VVEERRSSIIOONNSS AANNDD AACCCCEESSSSOORRIIEESS

CHINA

Tel: [+86] (21) 6282 8001
Fax: [+86] (21) 6282 8002

EUROPE

Tel: [+44] (0) 1438 742200
Fax: [+44] (0) 1438 727601

FRANCE

Tel: [+33] 1 60 79 96 00
Fax: [+33] 1 60 77 69 22

HONG KONG

Tel: [+852] 2832 7988
Fax: [+852] 2834 5364

SCANDINAVIA

Tel: [+45] 9614 0045
Fax: [+45] 9614 0047

SPAIN

Tel: [+34] (91) 640 11 34
Fax: [+34] (91) 640 06 40

UNITED KINGDOM

Tel: [+44] (0) 1438 742200
Toll Free: [+44] [phone] (UK only)
Fax: [+44] (0) 1438 727601

USA

Tel: [+1] [phone]
Toll Free: [+1] [phone] (US only)
Fax: [+1] [phone]

www.aeroflex.com

[e-mail]

As we are always seeking to improve our products,
the information in this document gives only a general
indication of the product capacity, performance and
suitability, none of which shall form part of any con­tract. We reserve the right to make design changes
without notice. All trademarks are acknowledged.
Parent company Aeroflex, Inc. ©Aeroflex 2003.

When ordering please quote the full ordering number information.

Ordering Numbers
Versions

6970 RF Power Meter with built-in power reference 6970 RF

Power Meter must be used with one of the AC Adapters
listed below. One Adapter must therefore be ordered with
each instrument

54441/016 AC Adapter - UK Style
54441/017 AC Adapter - European Style
54441/018 AC Adapter - USA Style

Supplied with

43138/663 1.5 m Power Sensor Cable
46882/182 Operating Manual
46882/183 Summary Card
23421/641 2.1 mm Power Connector Plug

Accessories

54112/159 Carrying Pouch
54311/171 DC Supply Lead
46882/207 Service Manual
54417/002 Waveguide 22 to 2.92 mm Transformer

POWER SENSORS - STANDARD

56910/900 10 MHz to 20 GHz (-30 dBm to +20 dBm) Type N.
56911/900 10 MHz to 20 GHz (-30 dBm to +20 dBm) APC 7.
56912/900 30 kHz to 4.2 GHz (-30 dBm to +20 dBm) Type N.
56913/900 10 MHz to 26.5 GHz (-30 dBm to +20 dBm) MPC

3.5.

56914/001 10 MHz to 40 GHz (-30 dBm to +20 dBm)

2.92 mm.

56914/002 10 MHz to 40 GHz (-30 dBm to +20 dBm) 2.92 mm

plus waveguide 22 coax transition and calibration
table.

56914/003 10 MHz to 46 GHz (-30 dBm to +20 dBm)

2.92 mm.

56919/900

POWER SENSORS - LOW POWER

56920/900 10 MHz to 20 GHz (-70 dBm to -20 dBm) Type N.
56923/900 10 MHz to 26.5 GHz (-65 dBm to -20 dBm) MPC

75 Ω 30 kHz to 3 GHz (-30 dBm to +20 dBm) Type N

3.5
56924/001 10 MHz to 40 GHz (-65 dBm to -20 dBm) 2.92 mm.
56924/002 10 MHz to 40 GHz (-65 dBm to -20 dBm) 2.92 mm

plus waveguide 22 coax transition and calibration
table

56924/003 10 MHz to 46 GHz. (-65 dBm to -20 dBm)

2.92 mm.

Power Sensors - High power

56930/900 10 MHz to 18 GHz (-15 dBm to +35 dBm) Type N.
56932/900 30 kHz to 4.2 GHz (-15 dBm to +35 dBm) Type N.
56934/001 10 MHz to 40 GHz (-15 dBm to +30 dBm) 2.92 mm
56934/002 10 MHz to 40 GHz (-15 dBm to +30 dBm) 2.92 mm

plus waveguide 22 coax transition and calibration

table
56934/003 10 MHz to 46 GHz (-15 dBm to +30 dBm) 2.92 mm
56930/002 10 MHz to 18 GHz (-5 dBm to +44 dBm) Type N
56932/002 30 kHz to 4.2 GHz (-5 dBm to +44 dBm) Type N

Part No. 46891/066, Issue 7, 02/04